SAN LUIS REY RIVER WATERSHED Urban Runoff Management Program Annual Report for Fiscal Year 2009-10

Prepared for California Regional Water Quality Control Board San Diego Region 9

By the

City of Oceanside ● City of Vista ● County of San Diego

January 2011

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SAN LUIS REY RIVER WATERSHED URBAN RUNOFF MANAGEMENT PROGRAM Annual report for Fiscal Year 2009-10

Prepared for

California Regional Water Quality Control Board San Diego Region 9

By the

City of Oceanside City of Vista County of San Diego

January 2011

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EXECUTIVE SUMMARY

Introduction This San Luis Rey (SLR) Watershed Urban Runoff Management Program (WURMP) Annual Report (AR) is the third annual report by the San Luis Rey Watershed Copermittees (SLR Copermittees) addressing Municipal Storm Water Permit Order Number R9-2007-0001 (Municipal Permit). The San Luis Rey Watershed Copermittees (SLR Copermittees) include the City of Oceanside, the City of Vista, and the County of San Diego. The City of Oceanside serves as the Lead Watershed Copermittee for the SLR Watershed Management Area (WMA). The SLR WURMP AR covers the time period July 1, 2009 – June 30, 2010 (FY 2009-10) and describes the SLR Copermittees collaborative plans and efforts to reduce the impacts of urban activity on receiving water quality within the SLR WMA to the maximum extent practicable.

During this reporting period the SLR Copermittees continued to address the watershed’s high priority water quality pollutants identified in the 2008 San Luis Rey WURMP (2008 SLR WURMP) as bacteria and nutrients. This focus is reflected in Section 3.0 - Implementation of Watershed Activities, which enumerates the high-priority-focused watershed water quality and watershed education activities.

The SLR Copermittees will continue to re-evaluate and refine the SLR WURMP by implementing an effectiveness assessment component for the overall program. As more knowledge about pollutant sources and innovative and effective management measures to address those sources become available, the SLR Copermittees will use the Model Watershed Urban Runoff Management strategy to guide selection and implementation of watershed activities. Moreover, the SLR Copermittees will continue to utilize the Baseline Long-Term Effectiveness Assessment (BLTEA) process to assist in further identifying pollutant sources and focusing program efforts to control those sources.

Program Highlights During this reporting period the SLR Copermittees made significant progress in developing and implementing watershed water quality and watershed education activities that receive WURMP credit based on the current Municipal Permit. In addition to these activities the SLR Copermittees coordinated other activities that they feel work toward reaching the overall goal of the SLR WURMP.

The goal of the WURMP is to positively affect the water quality of the SLR WMA while balancing economic, social, and environmental constraints. This goal will be pursued and ultimately achieved through the implementation of the following specific objectives: • Objective #1: Develop and implement a strategic plan to assess and improve water quality within the SLR WMA, which responds to identifiable problems and reflects the beneficial uses of the watershed. • Objective #2: Integrate watershed principles into land use planning that affects the SLR WMA. • Objective #3: Enhance public understanding of watershed issues and pollution prevention within the SLR WMA.

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• Objective #4: Encourage and enhance public involvement in activities related to urban runoff management within the SLR WMA.

To help reach this goal and the objectives, the SLR Copermittees worked to identify, implement, and assess appropriate watershed water quality, education, and public participation activities, as well as watershed-based land use planning mechanisms, to properly target high priority water quality problems and their sources.

Report Organization The 2009-10 SLR WURMP AR consists of a total of five sections and is organized as follows:

Section 1.0 – Introduction Section 1 summarizes the program background, program approach (including goals and objectives), and applicable regulatory requirements. It briefly describes the watershed and gives a general overview of the organization and content of the report. It also describes Copermittee collaboration during the reporting period.

Section 2.0 – Water Quality and Pollutant Source Assessment This section provides an updated assessment and analysis of the watershed’s current and past applicable water quality data reports, analyses, and other information, including identification of the watershed’s water quality problems and high priority water quality problems during the reporting period. This section also describes the likely sources, pollutant discharges, and other factors causing the high priority water quality problems within the watershed.

Section 3.0 – Implementation of Watershed Activities This section includes a summary of all watershed water quality and watershed education activities planned for implementation during the reporting period FY 2009-10. The Watershed Activity Implementation Sheets for these activities are presented in Appendix A. This section also discusses public participation mechanisms utilized during the reporting period and the parties that were involved. In addition, this section describes the efforts implemented to encourage collaborative watershed based land-use planning amongst the SLR Copermittees. And, Section 3.5 provides an updated five-year strategic plan that the SLR Copermittees have proposed for the SLR WMA, including new watershed water quality and education activities.

Section 4.0 – Effectiveness Assessment This section focuses on assessing WURMP effectiveness as a whole with consideration of the following: • An assessment of SLR Copermittee collaboration efforts during the reporting period • An assessment of whether watershed activities are focused on the appropriate water quality problems and sources or whether additional information is needed to reach such conclusions. • A comprehensive assessment of the impact of all WURMP activities (considered collectively) on the watershed’s high priority problems, with a focus at the Hydrologic Area (HA) level. This section includes any documented changes in pollutant loads, urban runoff and discharge quality, and receiving water quality.

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• Measurable targeted outcomes and assessment measures will be used to facilitate assessment whenever possible. Assessment Levels 1-6 will be applied to the watershed as a whole, where applicable and feasible.

Section 5.0 – Conclusions and Recommendations This section provides conclusions and recommendations as determined by the SLR Copermittees based on the overall Annual Report and assessment.

Conclusions and Recommendations

Lower San Luis Hydrologic Area Conclusions The high priority water quality problems in the Lower San Luis HA identified in the SLR WURMP 2008 are bacteria and nutrients. Water quality data collected during previous reporting periods in FY 2007-08 and FY 2008-09 provided new information specific to the HA, as there was a TWAS installed towards the bottom of the Bonsall HSA (FY 2007-08 only) in addition to the historical MLS. Data was collected during ambient (dry) and storm (wet) conditions at the TWAS and MLS. Data collected from water quality monitoring activities during FY 2009-10, in addition to the data mentioned above continues to support listing bacteria and nutrients as high priority water quality problems in the Lower San Luis Rey HA.

Watershed Water Quality Activities During FY 2009-10, six water quality activities in the HA were in the implementation phase, two designed to address water quality problems related to bacteria, two designed to address nutrients, and two that address both bacteria and nutrients. These activities appear well designed to address high priority water quality problems in the watershed. Continued monitoring programs throughout the watershed will continue to complement Copermittee data collected as part of the Regional and Jurisdictional Monitoring Programs. These additional programs will likely lead to the implementation of appropriate water quality and education activities targeting identified sources of bacteria and nutrients in the watershed.

During FY 2010-11, eight water quality activities are planned to be implemented, with three designed to address water quality problems related to bacteria, two designed to address nutrients, and three that address both bacteria and nutrients.

Watershed Education Activities During FY 2009-10, the Copermittees implemented six watershed education activities: one focused on bacteria, one focused on nutrients, and four focused on both bacteria and nutrients. Through these education activities outreach was conducted to a variety of populations including pet owners, nurseries, and horse property owner/operators.

In FY 2010-11, seven education activities are planned with one designed to address water quality problems related to bacteria, two designed to address nutrients, and four that address both bacteria and nutrients.

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Recommendations Current water quality activities appear to address identified high priority water quality problems. However, sources need to be linked to the high priority pollutants in order to more completely assess the effectiveness of these activities. This may be accomplished via research, current data assessments, and supplemental monitoring specific to these activities. The current monitoring programs under implementation in the watershed are a positive step in establishing this linkage.

Future data collection should focus on MS4 discharges and source characterization. The current Regional Monitoring program focus is largely on receiving water quality characterization and does not provide the watershed groups data to support MS4 investigations and source identification efforts. The development and implementation of the MS4 outfall and Source Identification programs may provide useful information to the WURMPs but will be limited in scope.

Some of the hydrologic areas in the SLR Hydrologic Unit (HU) have no receiving water data. Collection of receiving water data where limited sets exist may assist WURMP Copermittees in developing water quality assessments and prioritizing HAs.

Water quality activities that have proven effective may be expanded to other HAs where funding is available. Education activities are often broad in nature and reach targeted groups throughout the watershed; however, where this is not occurring, other Copermittees may wish to build on the experience gained in some of the specific education activities.

Activities in the watershed appear to be properly focused on identified water quality problems in the HU. These types of activities should continue as bacteria and nutrients show increasing trends at receiving water monitoring stations. Future monitoring should continue to focus on source identification activities in the watershed, especially related to suspected bacteria and nutrient pollution. TWAS data should be examined carefully as it is available to discern between water quality in the upper and lower watersheds. At this time, it appears that the focusing of activities in the lower watershed is appropriate. Additional TWAS and MLS data will be collected during FY 2010-11.

Monitoring programs throughout the watershed will continue to complement Copermittee data collected as part of the Regional and Jurisdictional Monitoring Programs. These additional programs will likely lead to the implementation of appropriate water quality and education activities targeting identified sources of bacteria and nutrients in the watershed.

Elevated TDS concentrations are persistent throughout the SLR HU and most of San Diego County. Sources of the elevated TDS are suspected to be related to the region’s reliance on imported water and its relation to groundwater recharge in San Diego aquifers, as shown in the results of WURMP Activity SLR-001, the SLR Watershed Water Quality Monitoring Program. Because this is a region-wide problem, efforts for source reduction and abatement will likely be addressed on a regional scale rather than by watershed.

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Warner and Monserate Hydrologic Areas Conclusions and Recommendations With minimal development in both the Warner and Monserate HAs, it is expected that anthropogenic impacts to water quality are limited. Although water quality data for these HAs is minimal, the available data and amount of development in the lower parts of the watershed support the Copermittees decision to focus efforts elsewhere in the watershed to maximize positive impacts of activities.

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ES EXECUTIVE SUMMARY ES-1

1 INTRODUCTION 1-1

1.1 COPERMITTEE COLLABORATION 1-6 1.1.1 SAN LUIS REY WURMP MEETINGS 1-6 1.2 WATERSHED MAP UPDATES 1-7

2 WATER QUALITY AND POLLUTANT SOURCE ASSESSMENT 2-1

2.1 WATERSHED WATER QUALITY ASSESSMENT 2-1 2.1.1 2009-10 WATER QUALITY PROGRAMS AND DATA 2-1 2.1.2 2009-10 WATER QUALITY MONITORING RESULTS 2-2 2.1.3 WATERSHED WATER QUALITY PROBLEMS 2-14 2.2 POLLUTANT SOURCE ASSESSMENT 2-16 2.2.1 POTENTIAL BACTERIA SOURCES 2-16 2.2.2 POTENTIAL NUTRIENT SOURCES 2-19 2.2.3 OTHER POTENTIAL POLLUTANT SOURCES 2-23

3 IMPLEMENTATION OF WATERSHED ACTIVITIES 3-1

3.1 WATERSHED WATER QUALITY ACTIVITIES 3-2 3.2 WATERSHED EDUCATION ACTIVITIES 3-2 3.2.1 ADDITIONAL WATERSHED ACTIVITIES 3-3 3.3 PUBLIC PARTICIPATION ACTIVITIES 3-3 3.4 COLLABORATIVE LAND -USE PLANNING EFFORTS 3-7 3.4.1 CROSS -JURISDICTIONAL COMMUNICATION 3-7 3.5 UPDATED 5-YEAR STRATEGIC PLAN 3-8 3.5.1 NEW WATERSHED ACTIVITIES 3-8 3.5.2 UPDATED 5-YEAR STRATEGIC PLAN 3-8 3.6 TMDL BMP IMPLEMENTATION 3-8

4 EFFECTIVENESS ASSESSMENT 4-1

4.1 ASSESSMENT OF OVERALL WURMP EFFECTIVENESS 4-2 4.1. PERMIT COMPLIANCE (L EVEL 1) 4-2 4.1.1 CUMULATIVE IMPACTS OF ACTIVITIES (L EVELS 2, 3, AND 4) 4-2 4.1.2 INTEGRATED ASSESSMENT : LEVEL 5 (C HANGES IN DISCHARGE WATER QUALITY ) AND LEVEL 6 (C HANGES IN RECEIVING WATER QUALITY ) 4-9

5 CONCLUSIONS AND RECOMMENDATIONS 5-1

5.1 CONCLUSIONS FOR WARNER VALLEY HA 5-1 5.2 CONCLUSIONS FOR MONSERATE HA 5-1 5.3 CONCLUSIONS FOR THE LOWER SAN LUIS HA 5-1

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5.3.1 WATER QUALITY ACTIVITIES 5-1 5.3.2 WATER QUALITY EDUCATION ACTIVITIES 5-2 5.4 RECOMMENDATIONS 5-2

6 REFERENCES 6-1

APPENDICES A WATERSHED ACTVITY IMPLEMENTATION SHEETS

LIST OF TABLES Table 1-1. Watershed Acreages by Jurisdiction. 1-5 Table 1-2. SLR WURMP Meeting Dates and Agenda Items Discussed. 1-6 Table 2-1. Water Quality Monitoring Activities in the San Luis Rey River WMA (FY 2009-10) 2-2 Table 2-2. Summary of San Luis Rey River Watershed Management Area Assessment Findings 2-4 Table 2-3. Summary of Spatial Distribution of Priority Wet Weather Constituents Compared to 2009-10 Random Wet MS4 Outfall Data. 2-6 Table 2-4. Summary of Spatial Distribution of Priority Dry Weather Constituents Compared to 2009-10 Random and Targeted Dry MS4 Outfall Data. 2-7 Table 2-5. San Luis Rey River WMA Assessment Conclusions in Relation to 2006 Section 303(d) Listings 1 2-8 Table 2-6. Water Quality Problems in the San Luis Rey WMA. 2-15 Table 2-7. Overview of Major Land Uses for San Luis Rey River WMA. 2-16 Table 2-8. Potential Bacteria Sources for the SLR River Watershed (From BLTEA). 2-17 Table 2-9. Potential Bacteria Sources by Hydrologic Sub-Area. 2-18 Table 2-10. Potential Nutrient Sources for the SLR River Watershed (From BLTEA). 2-21 Table 2-11. Potential Nutrient Sources by Hydrologic Sub-Area. 2-22 Table 3-1. Watershed Water Quality Activities. 3-2 Table 3-2. Watershed Education Activities. 3-3 Table 3-3. Additional Watershed Activities. 3-3 Table 3-4. River, Creek and Beach Cleanup Event Summary. 3-5 Table 3-5. SLR Watershed Five-Year WURMP Strategic Plan FY 2009-10 Update. 3-9 Table 4-1. SLR WURMP Municipal Permit Compliance Assessment. 4-2 Table 4-2. Summary of Watershed Water Quality and Education Activities in the SLR WMA. 4-4

LIST OF FIGURES Figure 1-1. San Luis Rey Watershed Hydrologic Areas. 1-5 Figure 2-1. Location of MLS, TWAS, and HSA – San Luis Rey River WMA 2-5 Figure 4-1. Trend Analysis for Bacteriological Constituents at the SLR MLS. 4-13 Figure 4-2. Trend Analysis for Dissolved Phosphorus at the SLR MLS. 4-14

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1 INTRODUCTION The San Luis Rey (SLR) River Watershed Urban Runoff Management Program (WURMP) Annual Report (AR) describes the watershed activities conducted by the City of Oceanside, the City of Vista, and the County of San Diego (SLR Copermittees) from July 1, 2009 through June 30, 2010. During this reporting period, the SLR Copermittees worked extensively to develop and implement activities that address water quality issues affecting the SLR River Watershed Management Area (WMA) based on requirements of the National Pollutant Discharge Elimination System (NPDES) Municipal Storm Water Permit (Municipal Permit) for San Diego County Copermittees, Order No. 2007-0001, NPDES No. CAS0108758.

Organization and Content of the Report This annual report is organized according to the Standardized Format for Watershed Urban Runoff Management Program Annual Reports outline included with the updated Watershed Urban Runoff Management Program (WURMP) documents submitted to the Regional Water Quality Control Board (RWQCB) in March 2008. This report endeavors to adhere to the organizational requirements of the Municipal Permit issued to 21 San Diego County Copermittees (County Copermittees) in January 2007.

The 2009-10 SLR WURMP AR consists of a total of five sections and is organized as follows:

Section 1.0 – Introduction Section 1 summarizes the program background, program approach (including goals and objectives), and applicable regulatory requirements. It briefly describes the watershed, gives a general overview of the organization and content of the report, and describes Copermittee collaboration during the reporting period.

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Section 4.0 – Effectiveness Assessment This section focuses on assessing WURMP effectiveness as a whole with consideration of the following: • An assessment of SLR Copermittee collaboration efforts during the reporting period • An assessment of whether watershed activities are focused on the appropriate water quality problems and sources or whether additional information is needed to reach such conclusions • A comprehensive assessment of the impact of all WURMP activities (considered collectively) on the watershed’s high priority problems, with a focus at the Hydrologic Area (HA) level. This section includes any documented changes in pollutant loads, urban runoff and discharge quality, and receiving water quality. • Measurable targeted outcomes and assessment measures will be used to facilitate assessment whenever possible. Assessment Levels 1-6 will be applied to the watershed as a whole, where applicable and feasible.

Section 5.0 – Conclusions and Recommendations This section provides conclusions and recommendations as determined by the SLR Copermittees based on the overall Annual Report and assessment.

Regulatory Requirements In January 2007, Municipal Storm Water Permit Order Number R9-2007-0001 (Municipal Permit) was issued to the San Diego County Copermittees as a renewal permit for Order No. 2001-01. The Permit was issued to 21 jurisdictions and agencies in San Diego County. The Permit addresses the basic federal requirement for a program that reduces pollutants discharged from municipal separate storm sewer systems (MS4s) to the maximum extent practicable (MEP).

Section E of the Municipal Permit requires that the Copermittees within the SLR River Watershed collaborate to develop and implement a watershed-based program that addresses urban runoff and surface water quality. The rationale for this program is simple: urban runoff does not follow jurisdictional boundaries and often travels through multiple jurisdictions while flowing to receiving waters. Therefore, the actions of various municipalities within a watershed regarding urban runoff can have a cumulative impact upon shared receiving waters. The Municipal Permit directs San Diego County Copermittees with land use authority within the watershed to collaborate in developing and implementing the WURMP, the purpose of which is to identify and address the watershed’s highest priority water quality problems. In addition, the Municipal Permit requires that the Copermittees develop activities that address education, public participation, and watershed-based land use planning.

Section E of the Municipal Permit defines the Copermittees within the nine regional watersheds, as well as a Lead Copermittee for each watershed. The following Copermittees are included in the SLR River Watershed: • City of Oceanside • City of Vista • County of San Diego

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The Municipal Permit designates the City of Oceanside as the default Lead Copermittee for the SLR River Watershed, and the City of Oceanside has agreed to continue to fulfill this role. The Municipal Permit requires that the Lead Watershed Copermittee be responsible for producing and submitting the WURMP. They are also responsible for coordinating meetings among watershed Copermittees to facilitate the development and implementation of watershed activities. The City of Oceanside continues to coordinate meetings at least quarterly to discuss and implement the various watershed activities and coordinate required regulatory submittals.

In accordance with Section E of the Municipal Permit, the Copermittees listed for each watershed must participate in the development and implementation of a WURMP. The requirements for the WURMP are listed in the Municipal Permit and include the following: • Mapping the watershed and identifying all receiving waters, all impaired receiving waters, land uses, highways, jurisdictional boundaries, and inventoried commercial, industrial, construction, municipal sites, and residential areas. • Assessing the water quality of all receiving waters in the watershed based on existing data and eventually performing watershed-based water quality monitoring activities. • Identifying and prioritizing major water quality problems in the watershed caused or contributed to by discharges from MS4s, including potential sources of the problems. • Developing and implementing a strategy of water quality and educational activities needed to address the highest priority water quality problems. • Identifying which Copermittees are responsible for implementing each recommended watershed activity. • Developing and implementing a mechanism for public participation in watershed activities. • Developing and implementing watershed-based education activities. • Developing a mechanism to facilitate collaborative watershed-based land use planning with other Copermittees in the watershed. • Developing a long-term strategy for assessing the effectiveness of the WURMP. • Submitting annual WURMP reports which shall document the Copermittees’ activities during the preceding year. At a minimum, the annual report must include: o A comprehensive description of all watershed activities conducted by the Watershed Copermittees for permit compliance. o Public participation mechanisms utilized during implementation. o Watershed-based land use planning mechanism description. o Effectiveness assessment of the WURMP. o Summary of watershed-related data not already included in the annual monitoring report. o Identification of water quality improvements or degradation.

SLR WURMP Goals and Objectives The goal of the WURMP is to positively affect the water quality of the SLR WMA while balancing economic, social, and environmental constraints. This goal will be pursued and ultimately achieved through the implementation of the following specific objectives:

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• Objective #1: Develop and implement a strategic plan to assess and improve water quality within the SLR WMA, which responds to identifiable problems and reflects the beneficial uses of the watershed. • Objective #2: Integrate watershed principles into land use planning that affects the SLR WMA. • Objective #3: Enhance public understanding of watershed issues and pollution prevention within the SLR WMA. • Objective #4: Encourage and enhance public involvement in activities related to urban runoff management within the SLR WMA.

To help reach this goal and the objectives, the SLR Copermittees work collaboratively to identify, implement, and assess appropriate watershed water quality, education, and public participation activities, as well as watershed-based land use planning mechanisms, to properly target high priority water quality problems and their sources.

San Luis Rey Watershed Description The SLR River Watershed is located along the northern border of San Diego County. It is bordered to the north by the Santa Margarita River Watershed and to the south by the Carlsbad and San Dieguito River Watersheds. The SLR River originates in the Palomar and Hot Springs Mountains, both over 6,000 feet above mean sea level (MSL), and extends west over 55 miles to form a watershed with an area of approximately 360,000 acres, or 562 square miles (see Figure 1-1). The river ultimately discharges to the Pacific Ocean at the western boundary of the City of Oceanside. Of the nine major watersheds in the San Diego region, the SLR River Watershed is the third largest in terms of land area (SANDAG 1998).

The SLR River Watershed or SLR Hydrologic Unit (HU) (903.00) is comprised of three HAs, which have been delineated by the San Diego Regional Water Quality Control Board (RWQCB) based on drainage patterns: Lower San Luis (HA 903.1), Monserate (HA 903.2), and Warner Valley (HA 903.3) (see Figure 1-1). Over 54% of the land in the watershed is vacant or undeveloped. The next largest land uses in the watershed are residential (15%) and agriculture (14%). The highest concentration of population is located in the Lower San Luis HA. There are six federally recognized Tribal Indian Reservations with land in the watershed. The highest point in the San Luis Rey Watershed (and in San Diego County) is Hot Springs Mountain with an elevation of 6,533 feet (1,991 meters).

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Figure 1-1. San Luis Rey Watershed Hydrologic Areas.

About half (49%) of the land in the watershed is privately owned. Publicly owned land accounts for approximately 37% of the area, and the remaining 14% consists of numerous reservations in the watershed. In the western half of the watershed, private ownership dominates. Moving east through the watershed, public lands increase and dominate in the Warner Valley HA. The Vista Irrigation District (VID) is the single largest landowner in the watershed.

Five jurisdictions have land use authority in the SLR Watershed and include the Cities of Escondido, Oceanside and Vista and the Counties of San Diego and Riverside. A number of other governmental agencies also administer lands within the unincorporated areas of San Diego County. A general breakdown of jurisdictional areas within the watershed is shown in Table 1-1.

Table 1-1. Watershed Acreages by Jurisdiction. Jurisdiction Acres Percentage of Watershed (%) Escondido 52 0.0 Oceanside 15,883 4.4 Vista 743 0.2 Unincorporated San Diego County 342,566 95.2 Riverside County 649 0.2 Total 359,893 100.0 Source: SANDAG 1998. (Note: Of the sources reviewed, values for total size of the watershed and the breakdown of the watershed by jurisdictions were similar but often different. Therefore, the values provided in this table are for general purposes only and should be verified if used for other purposes.)

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1.1 Copermittee Collaboration The Cities of Oceanside and Vista and the County of San Diego share the implementation responsibilities for the SLR WURMP. Using the watershed approach, the SLR Copermittees aim to positively affect the water quality of the SLR River Watershed in a cost effective, environmentally sensitive, and collaborative manner.

The San Diego County Copermittees have developed a Model Watershed Urban Runoff Management Strategy (Strategy) to guide the selection and implementation of Watershed Activities that appropriately addresses each watershed Copermittees’ contribution to the high priority water quality problems in their WMA. Data analyzed to date for the SLR Watershed suggests that bacteria and nutrients are high priority water quality problems in the Lower San Luis HA.

Having used the watershed strategy as the basis for developing the activities, the SLR Copermittees have focused activity efforts on the potential sources that are most likely to be contributing the pollutants that are causing the high priority water quality problems in the SLR WMA. Where receiving water conditions and pollutants sources were not clearly characterized, monitoring and source identification activities were planned and implemented.

1.1.1 San Luis Rey WURMP Meetings In order to effectively develop the 2008 SLR WURMP Update required by Municipal Permit Order R9-2007-0001 and to plan and implement the San Luis Rey WURMP in current and subsequent years the SLR Copermittees met five times during FY 2009-10. The SLR Copermittees developed and prioritized water quality activities that address pollutants of concern in the watershed, exchanged ideas on how to address high priority water quality pollutants in the watershed, evaluated the effectiveness of actions, and collaborated on development of required submittals. See Table 1-2 for dates of these meetings and pertinent agenda items discussed at these meetings.

The general watershed meetings of the San Luis Rey WURMP workgroup were led by the City of Oceanside. Activities and tasks developed by the Copermittees were then carried out by the Copermittees within the structure of their jurisdictional organization. Task completion was then tracked and assessed at the workgroup meetings and is being reported in this Annual Report.

Table 1-2. SLR WURMP Meeting Dates and Agenda Items Discussed. Date Agenda Item Topics Review of 08-09 activities; Review of 09-10 Activities; Proposed 303(d) listings; 10/20/09 Annual report schedule and section assignments WURMP Annual Report section updates; New 303(d) listings; Watershed 01/05/10 activity review and updates; 2010-11 activity planning; meeting schedule 02/16/10 Assessment of activities; Activity updates; Monitoring and reporting; Regional water quality monitoring results; Review of Copermittee SLR water 4/20/10 quality monitoring efforts; activity updates Review of SLR River monitoring programs; 2012 303(d) list call for data; Activity 06/15/10 updates;

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1.2 Watershed Map Updates Section J.2. of the Municipal Permit requires that the WURMP provide an accurate map of the watershed that identifies the following: All receiving waters (including the Pacific Ocean); Clean Water Act section 303(d) impaired receiving waters; land uses; MS4s, major highways, jurisdictional boundaries; and inventoried commercial, industrial and municipal sites. In a letter dated September 23, 2008, the Regional Water Quality Control Board requested Copermittees increase the size of the watershed maps to no smaller than 36 inches by 24 inches. See Appendix B of the 2007-08 WURMP AR for a copy of the increased map size.

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2 WATER QUALITY AND POLLUTANT SOURCE ASSESSMENT This section presents a current assessment of surface water quality and potential pollutant sources within the SLR WMA. The SLR Copermittees participate in a regional monitoring program, which rotates between the northern and southern watersheds of San Diego County every other year. During the FY 2009-10 reporting period, regional monitoring efforts were focused in the southern watersheds. Therefore, the current water quality assessment for the SLR WMA does not include FY 2009-10 data from several major monitoring programs, including the Temporary Watershed Assessment Stations (TWAS) and Mass Loading Stations (MLS). Instead, this assessment is largely based on historical MLS and TWAS data as well as data collected from jurisdictional monitoring programs, Stormwater Monitoring Coalition (SMC) Program ambient monitoring, and special watershed studies. A detailed review of all monitoring activities taking place within the SLR watershed over the current reporting period can be found in the 2009-10 Urban Runoff Monitoring Annual Report (Regional Monitoring Report). The pollutant source assessment is based on land use coverages, facility source inventories, as well as past and present source characterization efforts.

2.1 Watershed Water Quality Assessment This section provides an updated assessment of applicable water quality data reports, analyses, and other information, including identification of the watershed’s water quality problems and high priority water quality problems.

2.1.1 2009-10 WATER QUALITY PROGRAMS AND DATA Table 2-1 identifies the active water quality monitoring programs within the SLR WMA and briefly summarizes monitoring activity during FY 2009-10.

For further details on the following programs, please refer to the Regional Monitoring Report, which is submitted under separate cover:

• Stormwater Monitoring Coalition (SMC) Program • Jurisdictional Dry Weather Monitoring (DWM) • Coastal Storm Drain Monitoring (CSDM)

Jurisdictional DWM Program results are also discussed in individual Jurisdictional Urban Runoff Management Program (JURMP) Annual Reports. CSDM Program results are also included as an attachment to the 2009-10 Regional Monitoring Report.

In addition to jurisdictional and regional efforts, monitoring is conducted by the SLR Copermittees as part of two collaborative WURMP activities. Results from the SLR Watershed Water Quality Monitoring Activity (SLR-001) and the Guajome Lake Water Quality Monitoring Activity (SLR-008) are provided in the appendices to the respective activity sheets located in Appendix A of this document. SLR-001 monitoring is conducted jointly by the City of Oceanside and the County of San Diego. This monitoring specifically addresses total dissolved solids (TDS), chloride, nutrients, and bacteria throughout the lower SLR River and its tributaries.

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SLR-008 monitoring is conducted by the County of San Diego to characterize the contribution of nutrients to Guajome Lake.

Table 2-1. Water Quality Monitoring Activities in the San Luis Rey River WMA (FY 2009-10) Program Data Set Data Assessed Number of Sites Assessed Receiving Water Monitoring 3 Ambient Monitoring – SMC Regional Water chemistry and toxicity 3-SMC Sites* Monitoring Participation Rapid Stream Bioassessment –SMC Benthic macroinvertebrates, 3-SMC Sites* Regional Monitoring Participation periphyton, and physical habitat Water chemistry, bacteria, toxicity, Wet Weather Monitoring None (Off rotation) and trash Grain size, synthetic pyrethroid Post-Storm Sediment Pyrethroid pesticides, and total organic carbon None (Off rotation) Monitoring (TOC) Urban Runoff Monitoring 118 Field, analytical chemistry, and Jurisdictional Dry Weather Monitoring 38 trash 13 randomly selected outfalls MS4 Outfall Random Dry Weather Chemistry and bacteria visited: 8 sites dry, 5 flowing sites Monitoring sampled MS4 Outfall Random Wet Weather Chemistry and bacteria 5 randomly selected outfalls Monitoring MS4 Outfall Targeted Dry Weather Chemistry, metals, and bacteria 19 Monitoring MS4 Outfall Targeted Wet Weather Chemistry, metals, pesticides, and None Monitoring bacteria Regional Source Identification General chemistry, metals, 2 sites (1 in SLR) Monitoring bacteria, and pesticides Coastal Storm Drain Monitoring Coastal Outfall and Receiving 5 coastal sites, 36 harbor sites (CSDM) Program Waters WURMP Monitoring Activities 21 SLR-001: SLR Receiving Water and Field, TDS, chloride, nutrients, and 8 Receiving Water Sites; Urban Runoff Monitoring bacteria 11 Tributary Sites SLR-008: Guajome Lake Urban Field, nutrients, TSS 2 Tributary Sites Runoff Monitoring * The SMC Monitoring Program uses a random stratified program design and is one sample from a 425 sample point program to be collected over five years ( http://socalsmc.org/ProjectThree.aspx ).

2.1.2 2009-10 WATER QUALITY MONITORING RESULTS Table 2-2 summarizes annual monitoring results and identifies relationships between receiving water and municipal separate storm sewer system (MS4) outfall results during both wet and dry weather. The constituents listed in Table 2-2 represent medium and high priority constituents based on the Methodology for Annual and Long-Term Data Assessments for San Diego County Watershed Management Areas , Final Draft-Version 1 (SDCRC, 2010).

2-2 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report

Key findings for the San Luis Rey River WMA include the following: Comparison of Wet Weather and Dry Weather Results: o Receiving Water: No receiving water data were collected at the MLS or TWAS in this WMA due to the rotational nature of the Permit. Data from the three SMC sites and data from the previous monitoring season are presented for discussion purposes only with regard to potential relationships between priority constituents. The 2009-10 SMC data were collected as grab samples during ambient, dry season conditions. The priority constituents identified include total dissolved solids (TDS), total nitrogen, total phosphorus, chloride, and sulfate. In comparison, the wet weather priority constituents identified in 2008-09 were TDS and bacteria indicators. TDS was, therefore, a common priority constituent for both wet and dry weather flows. The SMC dry weather program did not include bacteria monitoring; therefore, the priority of bacteria in receiving waters in dry weather conditions cannot be determined from the available data. o MS4: The results of the MS4 outfall program indicated TDS and bacteria as priority constituents for both wet and dry weather flows at MS4 outfalls. Comparison of Receiving Water and MS4 Results: o Wet Weather: No wet weather MLS or TWAS data were available for receiving waters for 2009-10. The MS4 data for wet weather flows indicated bacteria, TDS, and pH were priority constituents. For comparison purposes, the 2008-09 wet weather results identified TDS and bacteria as priority constituents. o Dry Weather: No dry weather MLS or TWAS data were available for receiving waters for 2009-10. The MS4 data for dry weather flows indicated that bacteria, TDS, chloride, total nitrogen, total phosphorus, nitrate, and nitrate/nitrite were priority constituents. For discussion purposes, in comparing the dry weather MS4 results with the SMC receiving water dry weather results, nutrients (total nitrogen and total phosphorus) and TDS were identified as common priority constituents. Bacteria were not measured in the SMC sample.

No Copermittee composite, toxicity data were available for this reporting year due to the rotational nature of the Permit. For discussion purposes, the SMC toxicity grab sample results for dry weather indicated toxicity to C. dubia for chronic survival and reproduction at two of three SMC sites in the Bonsall HSA. The historical wet weather results from 2008-09 did not indicate toxicity as a concern. No toxic chemicals were identified as high priority constituents based on the MS4 data. TDS was considered a high priority constituent for both wet and dry weather based on the MS4 data. For comparison purposes, TDS was also rated as a high priority constituent in receiving waters based on the SMC dry weather results and historical Permit wet weather results. Several aquatic species, including C. dubia, have a low tolerance to higher concentrations of TDS and ion imbalance and thus TDS may be a cause of the toxicity (Mount et al., 1997).

The results of the SMC bioassessment survey indicated a Very Poor Index of Biotic Integrity (IBI) rating at two locations and a Fair IBI at an upper watershed location. These results are similar to the most recent Permit bioassessment survey results for the mass loading station (MLS) and temporary watershed assessment station (TWAS) locations from 2008-09 that were

2-3 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report rated Very Poor. The physical habitat was rated good and moderate at the two SMC sites with Very Poor ratings.

Table 2-2. Summary of San Luis Rey River Watershed Management Area Assessment Findings San Luis Rey River MLS Drainage Area

Annual Annual Dry Weather Constituents of 1

1 Wet Weather Constituents of Concern Core

System Concern Assessed Questions Addressed No MLS or TWAS Sampling During No MLS or TWAS Sampling During 2009- 2009-10 Season (South County 10 Season (South County Rotation) Rotation) SMC Results-2010 (3 Stations) (for 2008-09 Season Results (for comparison discussion purposes only) purposes only) • • Chemistry – Chloride, Sulfate, Chemistry – TDS • TDS, Total Nitrogen, Total Bacteria – Fecal Coliform • Phosphorus (station dependent) Toxicity – None • • Bacteria – Not Assessed Synthetic Pyrethroids Assessment – 1, 2 • Toxicity – C. dubia (station Bifenthrin (Med) dependent) • Bioassessment – Very Poor IBI at lower stations, Fair IBI at (MLS, TWAS, and SMC) SMC00693 Receiving Water Monitoring Synthetic Pyrethroids Assessment (2008-09) – Below thresholds (sediment) • Chemistry – TDS, Chloride, Total • Chemistry – TDS, pH (Med) Nitrogen, Total Phosphorus, Nitrate • Bacteria – Fecal Coliform (Med) (Med), Nitrate/Nitrite (Med) • Bacteria – Enterococci 3, 4 Monitoring (MS4 Outfall) Urban Runoff MLS Trends* Total coliforms, fecal coliforms, enterococci, Increasing dissolved phosphorus, and turbidity. 5 Decreasing TDS and total hardness Regional Source Study : Results of the Regional Source Study for Residential Land Use in San Luis Rey WMA (City of Oceanside) indicated that single-family residential land uses may be potential sources of TSS, turbidity, fecal coliforms and synthetic pyrethroids (bifenthrin, cyfluthrin, L-cyhalothrin, and permethrin) in stormwater flows during wet weather events. Residences with architectural copper may also be a source of copper to wet weather storm flows. *Trends based on available data. Due to the rotational nature of the monitoring program, some years may not have recorded data (based on 2008-09 monitoring season). 1: High frequency constituents of concern are determined following the Final Draft Annual Assessment Methodology developed during the 2009-10 Monitoring Season.

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Figure 2-1 presents the locations of the Copermittee and SMC receiving water monitoring locations in addition to the jurisdictional and HSA boundaries. The MLS station has been monitored since 2001. The TWAS station was monitored during the 2007-08 FY, and the SMC sites were monitored during ambient weather this fiscal year.

Figure 2-1. Location of MLS, TWAS, and HSA – San Luis Rey River WMA

Tables 2-3 and 2-4 present the wet and dry weather priority constituents, respectively, for receiving waters and allow a spatial comparison for MS4 data. The wet weather priority constituents were identified as such based on 2008-09 Copermittee data. The dry weather priority constituents were identified as such based on the 2009-10 SMC data. Because bacteria were not sampled as part of the SMC program, fecal coliform and Enterococci were added based on the MS4 outfall data. These tables summarize the spatial distribution of MS4 data compared to the priority constituents in the receiving water.

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Table 2-3. Summary of Spatial Distribution of Priority Wet Weather Constituents Compared to 2009-10 Random Wet MS4 Outfall Data. Total Dissolved Station Fecal Bifenthrin HA HSA Parameter Solids Type Coliforms (Med) (estimated) Mission n 1* 1* 0 (903.11) % > Criteria 0% 100% NA Bonsall n 3 3 0 (903.12) % > Criteria 67% 67% NA Moonsa Lower San NA NA NA NA (903.13) Luis (903.1) Valley Center NA NA NA NA (903.14) Woods MS4 by NA NA NA NA HSA (903.15) Rincon NA NA NA NA (903.16) Pala n 1* 1* 0 (903.21) % > Criteria 100% 100% NA Pauma Monserate NA NA NA NA (903.2) (903.22) La Jolla Amago NA NA NA NA (903.23) MS4 (n) 5 5 0 MS4 (%) > SLR-MLS Summary 60% 80% NA (MS4 to RW Comparison) Criteria RW Score** High* High* Med* *One station was used in the summary. **No receiving water data for current year. 2008-2009 data used for SLR-MLS receiving water comparison. HAs without MS4 data are not listed and include Warner Valley (903.3). HA - hydrologic area Key HSA- hydrologic subarea High > 50% MLS - mass loading station Medium >Exceedance 25% and ≤ MS4 - municipal separate storm sewer system Low 50%≤ 25% Exceedance NA – not available No Data RW – receiving water SLR - San Luis Rey River

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Table 2-4. Summary of Spatial Distribution of Priority Dry Weather Constituents Compared to 2009-10 Random and Targeted Dry MS4 Outfall Data. Total Total Station Total Fecal Entero- HA HSA Parameter Nitrogen Dissolved Chloride Sulfate Type Phosphorus Coliform coccus (calculated) Solids Mission n 0 2 2 2 2 2 0 (903.11) % > Criteria NA 100% 100% 100% 100% 50% NA Bonsall n 4 13 13 13 13 9 0 (903.12) % > Criteria 75% 85% 100% 23% 54% 89% NA Moonsa n 0 2 2 2 2 2 0 Lower (903.13) % > Criteria NA 100% 100% 0% 0% 0% NA San Luis Valley (903.1) Center NA NA NA NA NA NA NA NA (903.14) MS4 by Woods HSA NA NA NA NA NA NA NA NA (903.15) Rincon NA NA NA NA NA NA NA NA (903.16) Pala n 1* 2 2 2 2 1* 0 (903.21) % > Criteria 100% 100% 100% 0% 100% 0% NA Pauma Monserate NA NA NA NA NA NA NA NA (903.2) (903.22) La Jolla Amago NA NA NA NA NA NA NA NA (903.23)

Above Above Above Above Above SMC 02457 Score NA NA Benchmark* Benchmark* Benchmark* Benchmark* Benchmark*

Above Below Above Above Above RW** SMC 02933 Score NA NA Benchmark* Benchmark* Benchmark* Benchmark* Benchmark*

Above Above Above Above Above SMC 00693 Score NA NA Benchmark* Benchmark* Benchmark* Benchmark* Benchmark*

*One station was used in the summary. **No MLS data for current year. SMC sites are located in Lower San Luis HA and results for a station based on single grab sample. HAs without MS4 data are not listed and include Warner Valley (903.3). HA - hydrologic area Key HSA- hydrologic subarea High > 50% Above benchmark MLS - mass loading station Medium > 25% and ≤ 50% Above benchmark MS4 - municipal separate storm sewer system Low ≤ 25% Above benchmark NA – not available No Data RW – receiving water SMC – Stormwater Monitoring Coalition

The Regional Monitoring Program also included a source identification study that characterized runoff from two residential neighborhoods in Oceanside and Del Mar. The site in Oceanside was located in the SLR WMA and indicated that single-family residential land uses may be potential sources of total suspended solids (TSS), turbidity, fecal coliforms, and synthetic pyrethroids (bifenthrin, cyfluthrin, L-cyhalothrin, permethrin) in stormwater flows during wet weather events. Residences with architectural copper may also be a source of copper to wet weather storm flows. The Lower San Luis Rey hydrologic area (HA) is the most developed within the

2-7 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report

WMA and is characterized by primarily residential/spaced rural residential (35%) land uses. The land uses are primarily undeveloped in the upper HAs.

Table 2-5 summarizes the §303(d) listed water bodies and constituents within the San Luis Rey River WMA, and identifies whether available data support the listings. Table 2-5 also identifies where there are no data, and whether total maximum daily loads (TMDLs) have been developed. As identified in the table, there are listed waterbodies where data may be needed to verify impairments.

Table 2-5. San Luis Rey River WMA Assessment Conclusions in Relation to 2006 Section 303(d) Listings 1

303(d) Listed Waterbody Name HSA HSA No. Pollutant/ Stressor Supported by Regional Data Supported by SMC/ Third-Party Data No Data TMDL Pacific Ocean Mission 903.11 Indicator bacteria Shoreline

San Luis Rey River Mission 903.11 Chloride and TDS

Guajome Lake Mission 903.11 Eutrophic

Source: SWRCB, 2006. 1. The 2010 Section 303(d) List was made available after the development of this report and will be updated in future reports.

HSA – hydrologic subarea SMC – Stormwater Monitoring Coalition SWRCB – State Water Resources Control Board TDS – total dissolved solids TMDL – total maximum daily load

Answers to the five Core Management Questions are provided below. Since the SLR WMA was not sampled as a part of the Regional Monitoring Program during FY 2009-10, the answers have been formulated based on jurisdictional monitoring programs and SMC data, as well as historical regional monitoring data results.

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Core Management Question 1. Are conditions in receiving waters protective, or likely to be protective, of beneficial uses?

Core Management Question 1 aims to link water and habitat quality and species toxicity to the many beneficial uses of the San Luis Rey River Watershed. This question is best addressed using a long-term assessment in addition to a more detailed look at the linkage between priority constituents and specific beneficial uses. The Long-Term Effectiveness Assessment five-year analysis to be completed in the next fiscal year will provide a more robust data analysis, using a triad approach, and may provide the opportunity to better link these long-term trends with beneficial uses.

To present an annual snapshot, the question is best addressed with the Copermittee wet weather data assessment from the most recent wet weather data collection in 2008-09. The results of the 2008–09 wet weather monitoring data in the San Luis Rey River WMA indicate that TDS and indicator bacteria are priority constituents, although TDS and hardness show decreasing trends over time for wet weather. During the 2009-10 monitoring period ambient monitoring at three SMC sites identified chloride, sulfate, total nitrogen, and TDS above their respective benchmarks. Total phosphorus and nitrate were measured above the benchmarks in one of three SMC sites.

Historical stream bioassessment results indicate evidence of benthic community impairment in the San Luis Rey River WMA, with either Very Poor or Poor ratings. In 2010, two of the SMC bioassessment sites had Very Poor ratings. The third SMC site had a Fair rating and was the furthest upstream site sampled within the Lower San Luis HA. The low ratings may be influenced by a number of factors, including poor in-stream physical habitat, and the presence of pesticides (e.g., the synthetic pyrethroid Bifenthrin was detected during wet weather monitoring).

In previous years, toxicity has been sporadic and infrequent at the MLS. Since 2001, toxicity has been identified three times to C. dubia , once to H. azteca and twice to S. capricornutum. There is no evidence of persistent toxicity at the MLS during ambient or wet weather monitoring. In 2010, toxicity to C. dubia chronic survival and reproduction was observed in the furthest upstream SMC site in the Bonsall HSA, and to C. dubia reproduction at the other Bonsall HSA SMC site. Both of these SMC sites had results above the benchmarks for TDS, chloride, and sulfate, which may have contributed to the observed toxicity.

The monitoring conducted jointly between the City of Oceanside and the County of San Diego as WURMP Water Quality Activity SLR-001 provides additional ambient data for bacteria, TDS, and nutrients for eight main stem sites of the San Luis Rey River.

Monthly bacteria sampling conducted year-round during ambient conditions since 2004 indicates that the means of total coliform, fecal coliform and Enterococcus indicators remained below their corresponding AB411 single sample standards in the receiving water. Individual site means for two sites in the Mission HSA and one site in the Bonsall HSA were above the AB411 single sample standard for Enterococcus. Beginning in 2006, sampling has taken place at the Pacific Ocean and San Luis Rey River Mouth mixing zone. The mean bacteria results from this shore sampling were below the AB411 single samples standards for all bacteria indicators indicating

2-9 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report that conditions are likely protective of beneficial uses during ambient conditions along the shoreline. Eleven samples of total coliform, fecal coliform, and Enterococcus were conducted under the SLR-001 program in FY 2009-10. In this reporting year, there were no total coliform exceedances at the shoreline or in the river mouth. There was one exceedance at the shoreline for fecal coliform and three at the river mouth, and there were two exceedances for Enterococcus at the shoreline and nine at the river mouth. The number of exceedances has increased from the previous year. See Appendix A for more detailed information.

Supporting the 2009-10 SMC priority constituent findings, the WURMP monitoring Activity SLR-001 results show that both the mean total nitrogen and total phosphorous concentrations exceeded the Basin Plan water quality objectives of 0.1 mg/L for total phosphorus and 1.0 mg/L for total nitrogen at all monitoring locations. Along the main stem of the River, mean total phosphorous concentrations increased gradually from upstream (east) to downstream (west) but this pattern was not observed for total nitrogen whose highest mean concentration was recorded at the easternmost sampling location within the Bonsall HSA.

TDS and chloride concentrations were also collected through WURMP Activity SLR-001. The results support the SMC priority constituent findings for those analytes, as well. Generally, the mean concentrations of both TDS and chloride in the River tend to increase from east to west and mostly exceed the surface water Basin Plan objectives.

Core Management Question 2 What is the extent and magnitude of the current or potential receiving water problems?

As identified through multiple receiving water monitoring programs, the priority constituents during wet weather are TDS and bacteria. The priority constituents during dry weather are bacteria, nutrients, and TDS constituents including chloride and sulfate. Core Management Question 2 was addressed with magnitude of exceedance ratios for the FY 2008-09 ambient and wet weather conditions in the receiving waters and a spatial analysis of priority constituents during ambient conditions (wet weather monitoring was conducted only once at the MLS in 2008–09 due to participation in the Bight ’08 Program). The joint monitoring conducted by the County of San Diego and the City of Oceanside, detailed in Appendix A, also provides a spatial extent of exceedances for bacteria, TDS and chloride, and nutrients for mean results from 2004 through 2010 to supplement the regional and SMC data.

The greatest concentration-to-benchmark exceedances during ambient conditions in the San Luis Rey River WMA were observed for total nitrogen and TDS. Ratios varied among the three SMC sites assessed. Total nitrogen concentrations were sixteen times greater than the benchmark at the uppermost Bonsall HSA site and TDS concentrations were over three times greater at all three sites. Concentration-to-benchmark exceedances during wet weather at the MLS were greatest for indicator bacteria. The fecal coliform concentration during the 2008-09 storm event was more than 30 times greater than the water quality benchmark. Bacterial concentrations vary widely in storm water runoff, but fecal coliform concentrations at the MLS on average have been 12 times greater than the benchmark. The TDS concentration during wet weather in 2008–09 was 50 percent greater than the water quality benchmark, which is lower than the historical mean for the site.

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Receiving water spatial patterns in the San Luis Rey River WMA varied by constituent. Total nitrogen concentrations were greater than the benchmark at all three ambient SMC sites monitored in the WMA. Total nitrogen concentration was greatest at the most upstream site in the Bonsall HSA. The total nitrogen value at this site was driven entirely by nitrate. This site is located within a dense agricultural land use setting. Total phosphorus concentrations exceeded benchmark values only at the most downstream site in the Mission HSA and only by a small amount. The joint monitoring program, WURMP Activity SLR-001, observed similar spatial trends for nutrient data. The mean nitrate concentrations are highest at the eastern most location, Shearer Crossing, decrease moving west, and then spike again at the Murray sampling location.

Concentrations of chloride and sulfate, which are constituents comprising TDS, were one to two times greater than the benchmark at all ambient sites monitored by the SMC program. The uppermost site in the Bonsall HSA had the highest concentrations of chloride, sulfate, and TDS values, decreased at the next downstream site in the Bonsall HSA, and then increased slightly at the site in the Mission HSA. These results provide a snapshot of receiving water conditions during the time of the survey. Additional data are needed to provide a more robust assessment of the spatial patterns of water quality constituents within the San Luis Rey River WMA. The joint monitoring program results (SLR-001) show TDS and chloride increasing from east to west, with a slightly lower mean result at Douglas and a larger increase at Benet. All stations except for Shearer Crossing exceed the Basin Plan water quality objectives for TDS and chloride.

The joint monitoring program (SLR-001) also concluded that indicator bacteria means are typically lowest at the eastern and western most sampling stations, with a peak at the Douglas sampling location.

Historical stream bioassessment ratings conducted in the WMA indicate a Very Poor benthic community at both MLS and TWAS locations. The consistent rating of Very Poor at both the MLS and TWAS since 2001 suggests that the extent of the impairment on the benthic community is not isolated only to a single location. The SMC 2009–2010 bioassessment results also indicate a Very Poor benthic community at two of three random sites monitored within the WMA. However, the SMC site located furthest upstream had a fair rating that may suggest some variability in biological conditions spatially.

For a snapshot of spatial extent, toxicity results were assessed and varied by site during ambient weather SMC monitoring. Toxicity to C. dubia chronic survival was observed at the furthest upstream site in the Bonsall HSA and toxicity to C. dubia reproduction was observed at the next downstream SMC site within the Bonsall HSA.

Core Management Question 3 What is the relative urban runoff contribution to the receiving water problem(s)?

Core Management Question 3 was partially answered through the MS4 Outfall Monitoring Program. In 2009–2010, the San Luis Rey River WMA MS4 was assessed through the random dry, random wet, and targeted dry components of the MS4 Outfall Monitoring Program. The Long-Term Effectiveness Assessment five-year analysis to be completed in the next fiscal year will provide a more robust data analysis to answer this question. In addition, CSDM results and

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WURMP Activity SLR-001 provide supplemental information to address the relative urban runoff contribution to the receiving water problems.

During wet weather (random), results showed that fecal coliform and TDS were identified as high priority constituents while pH was identified as a medium priority constituent. The elevated TDS in the outfalls may be related to groundwater influences during the time of sampling as most outfalls were located in the Bonsall HSA and are likely within natural or earthen channels. The random MS4 Outfall Monitoring Program data will be more robust following the 5-year planned assessment period.

During dry weather (random and targeted), MS4 results showed that total nitrogen, total phosphorus, TDS, chloride, and enterococci were identified as high priority constituents. Nitrate was identified as a medium priority dry weather constituent. At the HSA level, results indicate a high number of the high priority constituents occurred in the Bonsall HSA, which is also the area with a high proportion of agricultural and spaced rural residential land use.

The CSDM results indicate that coastal storm drains do not appear to be affecting bacterial concentrations in the coastal receiving waters during dry weather conditions among the sites sampled.

Activity SLR-001 targets eight main stem river sites as well as eleven tributaries to the San Luis Rey River. Bacteria, nutrients and constituents comprising TDS (including chloride) were monitored in both the main stem and tributary sites. For bacteria, the total and fecal coliform relative mean concentration results are all below AB411 single sample standards and do not appear to correlate with the spikes in tributary concentrations. All but one tributary sampled for Enterococcus had results that were equal to or greater than the AB411 single sample standard; however, the majority of main stem sites and relative mean concentrations were less than the standard. The site with the highest mean concentration (Douglas) has no visible tributaries or outfalls between it and the next upstream main stem site (Murray).

All of the tributaries sampled during joint monitoring have a mean concentration greater than the Basin Plan objective for TDS and all but one have mean concentrations greater than the objective for chloride. Two tributaries in the Mission HSA (Sleeping Indian and Pilgrim Creek) have also been identified as having high TDS concentrations. Pilgrim Creek was also identified as having the highest chloride concentration. Both sites downstream of these tributaries do show a slight increase in TDS and chloride levels. However, mineral composition of TDS at Pilgrim Creek renders that tributary characteristically different from the others. The mean concentrations of the main stem samples are very similar to the mean groundwater concentrations, which indicate that groundwater is influencing water quality in the main stem.

Nitrate concentrations at the Sleeping Indian tributary are significantly higher than the other tributaries, although it does not contribute the highest loading amounts. However, the location downstream of Sleeping Indian does have an increase in nitrate concentrations. Shearer Crossing, in the main stem, has the highest mean nitrate concentration, but is the easternmost sampling location and is therefore not associated with a tributary upstream. Orthophosphate concentrations are again highest at the Sleeping Indian and Pilgrim Creek outlets. Murray,

2-12 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report downstream of Sleeping Indian, shows a decrease in orthophosphate levels. Benet, downstream of Pilgrim Creek, does show a slight increase in orthophosphate levels indicating the tributary may have an affect on the receiving waters.

Core Management Question 4 What are the sources of urban runoff that contribute to receiving water problem(s)?

Core Management Question 4 is partially answered through land use analysis and limited monitoring data through the Source Identification Monitoring Program. The Source Identification Monitoring Program targeted single family residential neighborhoods to characterize discharges from this land use. During the previous fiscal year, monitoring was focused on ambient conditions. During FY 2009-10, monitoring was focused on assessing wet weather conditions. The Jurisdictional DWM Program, the CSDM Program, and trash assessment in the receiving waters also provide some information on urban runoff sources. More detailed discussion of urban runoff sources can be found in each Copermittees Jurisdictional Urban Runoff Monitoring Program Annual Report and in the CSDM Program Annual Report.

A wet weather source identification study of single family residences was conducted by the Copermittees during the 2009–2010 monitoring season. Results from this study suggest that fecal coliforms, TSS, turbidity, synthetic pyrethroids, dissolved metals, and Malathion may locally occur in concentrations above wet weather benchmarks. The results of the dry weather source identification study conducted by the Copermittees during the 2008–2009 Monitoring Season also indicated that synthetic pyrethroids were commonly detected in runoff from residential land uses in concentrations above published toxicity benchmarks for aquatic invertebrates. However, the Stormwater Monitoring Coalition suggests that the synthetic pyrethroid analytical method may be highly variable (Schiff, 2009). Pyrethroid benchmarks are provided for comparison purposes only and should be used as tool for further assessment when compared with toxicity results. The 2008-2009 dry weather monitoring source identification study also indicated bacteria concentrations were generally higher at sites influenced from overland runoff in comparison to one site influenced from continuous groundwater flows. Additionally, nitrate, chloride, and elevated conductivities were associated with areas influenced by groundwater discharges (which may be a result of perched water tables).

In the CSDM Program, one site has reoccurring exceedances for which the source has been sufficiently characterized. Coast 8 outfall drains the Harbor boat wash and RV dump station. Signage and structural BMPs have reduced the frequency of exceedances there.

The trash assessment conducted in 2009-10 as part of the Jurisdictional DWM Program was used to identify sources of trash in the San Luis Rey River WMA. A total of 41 sites were assessed for trash in the San Luis Rey River WMA, including six HSAs (some sites were visited multiple times). The highest number of submarginal or poor ratings occurred in the Mission HSA (25 submarginal and 3 poor ratings). This result coincides with the urbanized population centers, which are also found in the lower portion of the WMA. Two assessments were conducted in areas where an aquatic health threat was identified. The remaining ratings for the watershed were marginal, suboptimal, or optimal. No human health threats were identified.

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The sources of bacteria, TDS, and nutrients at the two tributaries with the highest concentrations of constituents of concern found through the joint monitoring program (SLR-001) are only partly characterized. A source investigation into the Sleeping Indian tributary found only a small, less than one gallon per minute, overland flow from an agricultural field. The remaining flow was from groundwater seepage. TDS and hardness has been shown to decrease to the northeast, but the sources of the minerals, nutrients, and bacteria have not been identified.

Core Management Question 5 Are conditions in receiving waters getting better or worse?

Core Management Question 5 is best addressed through trend analysis of constituent concentrations from monitoring over time. The majority of historical data is from wet weather monitoring at the San Luis Rey MLS (2001 through 2008). Because of the rotational nature of the permit, no new Copermittee data were collected in the SLR Watershed during this reporting period. Therefore, the following analysis is based on previous data assessments. The Long- Term Effectiveness Assessment five-year analysis to be completed in the next fiscal year will provide a more robust data analysis to assist in answering this question.

Based on the trend analysis, indicator bacteria (i.e., total coliforms, fecal coliforms, and enterococci), dissolved phosphorus, and turbidity are increasing over time at this site. In contrast, concentrations of TDS, total hardness, and dissolved nickel are decreasing over time.

Although dissolved phosphorus and turbidity appear to be increasing over time, the slopes of all three are shallow, and most concentrations have been well below the respective benchmark values. At the current observed rate of increase, it does not appear that any of these constituents will exceed wet weather benchmarks during the current Permit cycle.

Concentrations of TDS and total hardness appear to be decreasing over time at the San Luis Rey MLS. In 2008–2009, TDS concentrations were below the benchmark for the first time since monitoring began at the site. Relatively low TDS values in 2008–2009 are reflected in the total hardness values, which were also much lower during this sampling period compared with previous years. Future monitoring will determine if this trend can be sustained. The decreasing trend in dissolved nickel concentrations is likely inconsequential in terms of benchmarks, since concentrations of this constituent have been very low historically at this site.

The bioassessment ratings at the San Luis Rey MLS and TWAS have been Very Poor in nearly all assessments conducted from 2001 to 2008 and there are no apparent trends in the benthic community.

Toxicity has rarely been observed in samples collected from the San Luis Rey MLS. Between 2001 and 2008, toxicity to C. dubia was observed during the first storm season of 2001-2002 as well as toxicity to H. azteca during the 2007–2008 Monitoring Season, but no trends in the data set are apparent.

2.1.3 WATERSHED WATER QUALITY PROBLEMS Section 3.1.3 of the March 2008 WURMP identifies criteria to be used by the SLR Copermittees to identify priority and high priority water quality problems within the SLR WMA (SLR

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WURMP 2008). Based on these criteria, Table 2-6 identifies all the watershed water quality problems, including high priorities, and provides a brief explanation of the supporting information used to make each decision. In the 2007-2008 SLR WURMP Annual Report, the scale of the bacteria problem was expanded to include HSA 903.12 in addition to HSA 903.11. This change to the March 2008 WURMP was the result of new data that became available from the TWAS.

Table 2-6. Water Quality Problems in the San Luis Rey WMA. Water WURMP Quality High HSA(s) Explanation Problem Priority? Bacteria Yes HSA 903.11 - Pending TMDL for bacterial indicators at the HSA 903.12 mouth of the San Luis Rey River - 303(d) listing for bacterial indicators at the Pacific Ocean Shoreline - Persistent exceedances of fecal coliform and enterococcus benchmarks at the MLS and TWAS. Also see Appendix A, SLR-001. - Bacteria BLTEA rating of “A” for HA 903.1 Nutrients Yes HSA 903.11 - 303(d) listing for Eutrophication at Guajome Lake - Nutrients BLTEA rating of “A” for HA 903.1 Dissolved No HSA 903.11 - 303(d) listings for TDS and chloride for 19-mile Minerals downstream reach of San Luis Rey River (TDS & - Dissolved Minerals BLTEA rating of “A” for HA Chloride) 903.1 - Persistent exceedances of TDS and chloride benchmarks observed in SLR River and Tributaries (see Appendix A, SLR-001) Benthic No HSA 903.11 - Consistent “Poor” or “Very Poor” IBI ratings at the Alteration HSA 903.12 MLS and TWAS - Benthic Alteration BLTEA rating of “A” for HA 903.1

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2.2 Pollutant Source Assessment This section describes the likely sources, pollutant discharges, and other factors causing the high priority water quality problems within the watershed. Land use and facility source data have been examined and mapped for the entire watershed in order to identify the potential pollutant sources contributing to the watershed’s high priority water quality problems presented in Appendix A, Figure 3-4 of the 2008 San Luis Rey WURMP (SLR WURMP 2008). Table 2-7 presents an overview of the land use distribution for major land use categories and potential sources within each HSA. This table supports the Watershed Copermittees’ focus on activities in the Lower SLR Hydrologic Area. The Monserate and Warner Valley HAs consist of over 70% vacant land, open space, and preserve. Urban pollutant sources and anthropogenic influences appear to be very limited in the upper portions of the watershed. Moreover, there are only a few monitoring stations in these areas and very few exceedances have been observed to date. Figure 3-1 in Appendix A of the SLR WURMP 2008 provides a map of sampling locations in the SLR Watershed (SLR WURMP 2008).

Table 2-7 shows the contrast between the lower and upper watershed. Residential and agriculture land uses make up the highest percentage in the lower watershed whereas open space and vacant land make up most of the upper watershed.

Table 2-7. Overview of Major Land Uses for San Luis Rey River WMA. Major Land Use Categories 1

Hydrologic Sub Area Residential Commercial / Agriculture OS/Preserve Vacant Military Total Area Accounted for Industrial

acres % acres % acres % acres % acres % acres % % Lower San Luis HA (903.1) Mission HSA (903.11) 7,700 26 1,000 3 3,900 12 2,500 8 2,000 7 9,600 32 88 Bonsall HSA (902.12) 24,000 37 1,800 3 20,900 32 1,100 2 14,000 21 400 <1 96 Moosa HSA (903.13) Valley Center (903.14) 8,400 38 600 3 5,400 21 500 2 6,600 28 0 0 92 Woods HSA (903.15) Rincon HSA (903.16) Monserate HA (903.2) 9,200 9 800 1 18,300 17 14,000 13 64,200 59 0 0 99 Warner Valley HA (903.3) 4,300 3 400 <1 3,600 3 14,200 9 108,600 82 0 0 98 Total Land Area 53,600 52,100 32,300 195,400 1. Source: County of San Diego based on SANDAG 2006 data, land use categories have been grouped for demonstration purposes.

2.2.1 Potential Bacteria Sources The Baseline Long Term Effectiveness Assessment (BLTEA) represented the Copermittees’ first attempt to identify sources of bacteria in the SLR River Watershed. Table 2-8 presents the

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BLTEA’s list of “Likely” and “Unknown” bacteria sources that were identified based on the development of source loading potential (SLP) ratings (WESTON, LWA, & MOE 2005).

Table 2-9 lists the number of potential bacteria sources by HSA in addition to relevant land uses with the greatest potential to generate bacteria. Potential bacteria sources for which facility inventories have been developed are shown on maps in the SLR WURMP 2008, Appendix A, Figures 3-5 through 3-10 (SLR WURMP 2008).

Table 2-8. Potential Bacteria Sources for the SLR River Watershed (From BLTEA). Source Number of Potential Bacteria Sources Loading Sources Potential Botanical or zoological gardens and nurseries/greenhouses 315 Likely Eating or drinking establishments 277 Likely Animal Facilities 47 Likely POTWs (water and wastewater) 17 Likely Landscaping - parks, golf courses, cemeteries, etc. 15 Likely Home automobile associated activities, home and garden care activities, - Likely waste disposal Roads, streets, highways, and parking facilities - Likely Sites for disposing and treating sewage sludge - Likely Development subject to SUSMPs 115 Unknown Active or closed municipal landfills 5 Unknown Automobile wholesale 5 Unknown Motor Freight 2 Unknown Auto parking lots and storage facilities - Unknown Pest Control Services 49 Unknown Flood management projects and flood control devices - Unknown MS4s - Unknown Park and Recreational facilities - Unknown “-” signifies that no inventory information is available Inventory data provided by the County of San Diego – 2005

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Table 2-9. Potential Bacteria Sources by Hydrologic Sub-Area. Number of Facilities HSA Potential Bacteria Source or % Land Use

Food Establishments 198

Commercial Animal 66 Facilities

Mission HSA 903.11 Auto Facilities 7

Nurseries 54

% Residential 26%

% Agricultural 12%

Food Establishments 48

Commercial Animal 168 Facilities

Bonsall HSA 903.12 Auto Facilities 34

Nurseries 15

% Residential 37%

% Agricultural 32%

Food Establishments 20

Moosa HSA 903.13 Commercial Animal 47 Valley Center HSA 903.14 Facilities

Woods HSA 903.15 Auto Facilities 4 Rincon HSA 903.16 Nurseries 15

% Residential 38%

% Agricultural 21%

Food Establishments 9

Commercial Animal 34 Facilities

Monserate HSA 903.20 Auto Facilities 1

Nurseries 4

% Residential 9%

% Agricultural 17%

Food Establishments 7

Commercial Animal 0 Facilities

Warner Valley HSA 903.30 Auto Facilities 1

Nurseries 2

% Residential 3%

% Agricultural 3%

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There is currently only one location within the watershed where an adequate source identification study has been performed to characterize the bacterial pollutant source: the Oceanside Harbor Boat Wash outfall. The City of Oceanside performs routine sampling at the harbor boat wash and recreational vehicle sewage dump area as part of its CSDM Program. This monitoring has revealed high levels of bacteria in samples collected from the boat wash outfall. The outfall drains a short storm drain system where the only influence is from the public boat wash area which borders the sewage dump area for recreation vehicles. Educational signage and the installation of structural BMPs have decreased the exceedances of benchmark values at this site.

To identify the other sources of bacteria, specifically related to beach closures at the mouth of the SLR River, the City of Oceanside was awarded a Proposition 50 Clean Beaches Initiative grant. With matching funds from the County of San Diego and City of Oceanside, the bacteria source tracking project planned to: • Identify point and non-point sources of bacteria contamination in the lower SLR River and at the River mouth during dry and wet weather. • Estimate the dry, wet, and annual bacterial loading in the lower SLR River and at the River mouth. • Recommend Best Management Practices (BMP) to reduce and eliminate bacterial sources. Grant funding for this project was suspended in December of 2008 for one year. Though funding had ceased, monitoring by the City of Oceanside and County of San Diego continued monthly. Funding was reallocated and a new contract was approved in the Spring of 2010. Monitoring for the project is expected to be completed by the end of April 2011, with a final report due in the fall.

2.2.2 Potential Nutrient Sources The BLTEA represented the Copermittees’ first attempt to identify sources of nutrients in the SLR River Watershed. Table 2-10 presents the BLTEA’s list of “Likely” and “Unknown” sources that were identified based on the development of source loading potential (SLP) ratings (WESTON, LWA, & MOE, 2005).

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Table 2-11 lists the number of potential nutrient sources by HSA in addition to relevant land uses with the greatest potential to generate nutrients. Potential nutrient sources for which facility inventories have been developed are shown on maps in the SLR WURMP 2008, Appendix A, Figures 3-11 through 3-16 (SLR WURMP 2008). Preliminary investigations into land uses in the Guajome Lake drainage area have identified potential sources of nutrients to include residential, agricultural sources, commercial nurseries and agriculture, commercial horse facilities, and residential horse facilities.

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Table 2-10. Potential Nutrient Sources for the SLR River Watershed (From BLTEA). Source Number of Potential Nutrient Sources Loading Sources Potential Botanical or zoological gardens and nurseries/greenhouses 315 Likely Commercial Animal Facilities 47 Likely Landscaping - parks, golf courses, cemeteries, etc. 15 Likely Home automobile associated activities, home and garden care activities, - Likely waste disposal Roads, streets, highways, and parking facilities - Likely Park and Recreational facilities - Likely Eating or drinking establishments 277 Unknown Development subject to SUSMPs 115 Unknown Auto mechanical repair, maintenance, fueling, or cleaning 57 Unknown POTWs (water and wastewater) 17 Unknown Active or closed municipal landfills 5 Unknown Automobile wholesale 5 Unknown Corporate yards (incl. maintenance/storage yards) 4 Unknown Fabricated metal 4 Unknown Equipment mechanical repair, maintenance, fueling, or cleaning 3 Unknown Chemical and allied products 2 Unknown Airfields 2 Unknown Motor Freight 2 Unknown Primary metal 1 Unknown Auto parking lots and storage facilities - Unknown Mobile carpet, drape, or furniture cleaning 76 Unknown Pool and Fountain cleaning 60 Unknown Sites for disposing and treating sewage sludge - Unknown “-” signifies that no inventory information is available Inventory data provided by the County of San Diego - 2005

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Table 2-11. Potential Nutrient Sources by Hydrologic Sub-Area. Number of Facilities HSA Potential Nutrient Source or % Land Use

Commercial Animal Facilities 7

Nurseries 66

% Residential 26% Mission HSA 903.11 % Agricultural 12%

% Open Space 8%

% Industrial/Commercial 3%

Commercial Animal Facilities 34

Nurseries 168

Bonsall HSA 903.12 % Residential 37%

% Agricultural 32%

% Open Space 2% % Industrial/Commercial 3%

Commercial Animal Facilities 4 Moosa HSA 903.13 Nurseries 47 Valley Center HSA 903.14 Woods HSA 903.15 % Residential 38% Rincon HSA 903.16 % Agricultural 21%

% Open Space 2% % Industrial/Commercial 3%

Commercial Animal Facilities 1

Nurseries 34

Monserate HSA 903.20 % Residential 9%

%Agricultural 17%

%Open Space 13% % Industrial/Commercial 1%

Commercial Animal Facilities 1

Nurseries 0

Warner Valley HSA 903.30 % Residential 3%

%Agricultural 3%

%Open Space 9% % Industrial/Commercial <1%

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2.2.3 Other Potential Pollutant Sources In addition to the potential pollutant sources discussed in the preceding sections, there are other likely pollutant sources that contribute to water quality degradation in the San Luis Rey River WMA. These sources include natural groundwater, imported water supply, aerial deposition, wildlife impacts, natural erosion, transportation corridors, and military facilities and activities. These potential sources present very unique and difficult challenges in their identification, quantification and assessment of either degradation or improvement. Also noteworthy is the Copermittees’ jurisdictional and regulatory inability to control these sources or regulate their impacts and contribution to water quality degradation in the watershed.

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3 IMPLEMENTATION OF WATERSHED ACTIVITIES Per the requirements of the Municipal Permit, the SLR Copermittees are required to identify and implement Watershed Activities that address the high priority water quality problems in the WMA. Watershed Activities shall include both Watershed Water Quality Activities and Watershed Education Activities. These activities may be implemented individually or collectively, and may be implemented at the regional, watershed, or jurisdictional level.

Activity Selection Process During the planning process for the SLR WURMP 2008 the SLR Copermittees identified Watershed Activities that address the high priority water quality problems specific to the SLR WMA. Activity planning was conducted using the Collective Watershed Strategy which is a component of the Model Watershed Urban Runoff Management strategy found in the Regional Urban Runoff Management Program (RURMP). This process allows for the San Diego County Copermittees to establish and prioritize activities through the integration of water quality data to the loading potential of sources within the watershed and sub-watershed areas.

The first step in the strategy is to identify water quality problems watershed-wide and in each HA, where sufficient data is available. The second step is to identify the sources that are most likely contributing to the high priority water quality problems. The process used for the selection of potential sources that can contribute particular pollutants to the MS4 is outlined in the BLTEA document created by the San Diego County Copermittees in 2005. Based on the available data and the assessment of the first year of completed activities under the new Municipal Permit, the SLR Copermittees made appropriate management decisions when selecting and designing watershed water quality and watershed education activities. The overall goal of these activities is to reduce the discharge of pollutants causing the high priority water quality problems.

Activity Implementation WURMP activities may be implemented individually or collectively, but do not need to be implemented watershed wide. WURMP activities can be implemented by one or more jurisdictions in the watershed yet should be a part of an overall watershed strategy collaboratively developed by the watershed Copermittees. Some of the activities the SLR Copermittees conducted or planned during this reporting period were implemented jurisdictionally while others were implemented watershed-wide or regionally. See Section 3.5 below for an updated five-year strategic plan. This plan provides summary information about each of the proposed watershed activities (both water quality and education) including, the watershed priority pollutants targeted by the activity and an implementation schedule for that activity.

The Copermittees have made significant progress in developing and implementing programs aimed at improving stormwater and urban runoff quality in the watershed during this reporting period. See Section 3.1 for information about Watershed Water Quality Activities implemented and Section 3.2 for Watershed Education Activities implemented during this reporting period.

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3.1 Watershed Water Quality Activities The SLR Copermittees are responsible for identifying and implementing Watershed Water Quality Activities that address the high priority water quality problems in the WMA. These activities may be implemented individually or collectively, and may be implemented at the regional, watershed, or jurisdictional level. The activity selection process is briefly described above and more fully in the SLR WURMP 2008.

During this reporting period, the SLR Copermittees implemented six water quality activities. Table 3-1 lists the activities that were in active implementation during the reporting period. Details of the each activity, including the effectiveness assessment for each activity, can be found in Appendix A – Activity Implementation Summary Sheets.

Table 3-1. Watershed Water Quality Activities. Activity 2 ID # 1 Status Activity/Project Name Type Pet Waste Removal Pilot Project Along San Luis Rey Recreation SLR-004 WQ I Trail SLR-005 WQ I Pet Waste Bag Dispenser Program in County Parks SLR-009 WQ I Nutrient Source Identification and Abatement: Guajome Lake SLR-012 WQ I Land Acquisitions SLR-015 WQ I Focused Horse Property Outreach in the SLR River Watershed SLR-021 WQ I Fallbrook Community Center Artificial Turf 1WQ = Watershed Water Quality Activity 2I = Implemented

3.2 Watershed Education Activities This section describes actions planned by the SLR Copermittees during the 2009-10 reporting period to enhance the general public’s understanding of basic watershed principles and sources of water pollution. The Copermittees are responsible for identifying and implementing Watershed Education Activities that address the high priority water quality problems in the San Luis Rey WMA.

During the reporting period, the Copermittees implemented six watershed education activities. Table 3-2 below lists the activities that were in active implementation during the reporting period. Details of the each activity, including the effectiveness assessment for each activity, can be found in Appendix A – Activity Implementation Summary Sheets.

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Table 3-2. Watershed Education Activities. Activity Status 2 ID # 1 Activity/Project Name/Copermittee(s) Type Pet Waste Removal Pilot Project Along San Luis Rey SLR-004 WE I Recreation Trail SLR-007 WE I Water Runoff Management and Agricultural Waiver Workshop SLR-015 WE I Focused Horse Property Outreach in the SLR River Watershed Focused Grove and Nursery Outreach in the SLR River SLR-016 WE I Watershed Focused Onsite Wastewater System Outreach in the SLR River SLR-017 WE I Watershed SLR-019 WE I Hellhole Canyon County Park Educational Signage 1 WE = Watershed Education Activity 2I = Implemented

3.2.1 Additional Watershed Activities In addition to the Watershed Water Quality and Watershed Education activities that qualify for WURMP credit, the SLR Copermittees implemented, planned or assessed nine activities that they feel are important to implementation of the WURMP and development of future activities but don’t receive WURMP credit. Table 3-3 below lists the activities for which tasks were implemented, planned or assessed during the reporting period. Details of each activity can be found in the Activity Implementation Sheets located in Appendix A.

Table 3-3. Additional Watershed Activities. Activity ID # Activity/Project Name/Copermittee(s) Type* SLR-001 M, S SLR Watershed Water Quality Monitoring Program SLR-003 M Modular Wetland Installation of Oceanside Harbor Boat Wash Outfall SLR-008 M, S Guajome Lake Water Quality Monitoring Program SLR-010 M, S Lower SLR River Bacteria Source Tracking Study SLR-013 A Harbor Boat Wash Camera SLR-014 P Harbor Boat Wash Coin Operated Water Dispenser SLR-018 P Sports Park Watershed Education Signs SLR-020 P Residential Composting Workshop SLR-022 P Residential Rain Barrel Subsidies and Distribution M = Watershed Water Quality Monitoring Activity; S = Source Identification/Characterization Activity A = Assessment; P = Activity in Planning Stages

In addition to the above activity sheets the SLR Copermittees implemented various public participation and collaborative planning efforts that they feel are notable and should be reported in this WURMP Annual Report. The Copermittees feel that these additional activities are vital to the implementation of the overall WURMP and are complementary to the activities that qualify to receive WURMP credit. Details of each of these additional activities can be found Section 3.3.

3.3 Public Participation Activities The SLR Copermittees are responsible for implementing a watershed-specific public participation mechanism within the watershed. The mechanism encourages participation from

3-3 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report other organizations within the watershed which could include other agencies, private companies, non-governmental organizations, environmental groups, etc. Several opportunities are available to the public to engage them in the implementation of the WURMP. Below is a summary of these opportunities and information about how they were implemented during this reporting period.

Outreach Events The SLR Copermittees collaborated to staff informational booths at special events throughout the watershed. During this reporting period SLR Copermittees staffed booths at the following events and disseminated storm water related educational materials. • August 1 & 2, 2009 – Vista Rod Run • September 26, 2009 – Bates Nut Farm Education Day (Valley Center) • October 10, 2009 – Bonsall Country Festival • October 10, 2009 – Pride at the Beach (Oceanside Amphitheatre) • February 17, 2010 – Watershed Interpretation Signs at Hellhole Canyon Preserve • March 8, 2010 – Oceanside Green Fair (Oceanside Amphitheatre) • March 10, 2010 – San Diego County High Tech Fair • April 18, 2010 - Fallbrook Avocado Festival • April 25, 2010 – North County Earth Day at Mission San Luis Rey • May 15, 2010 – Operation Appreciation (Oceanside Amphitheatre) • May 22, 2010 – Strawberry Festival (Vista) • June 19, 2010 - EnviroFair Day at the San Diego County Fair

Educational Materials Distributed The SLR Watershed Copermittees collaborated on the dissemination of stormwater education pieces at outreach events. These materials were developed by the Copermittees, the Regional Education and Residential Sources Workgroup (ERS Workgroup) or developed in previous years by the North County Storm Water Program (NCSWP). Below is a summary of the materials distributed by the SLR Copermittees during this reporting period. • Construction brochure highlighting construction site BMPs • North County watershed map (“We All Live Downstream” poster) • BMP posters specifically for restaurant activities • BMP posters specifically for automotive repair and auto body repair activities • General BMP brochure for residents • Door hangers for residents with observed violations • Click-message pens • Pencils with Regional Stormwater Hotline • Integrated Pest Management (IPM) Tip Cards, English and Spanish • Personal pet waste bag dispensers • Fats, oil and grease (FOG) education materials

River, Creek, and Beach Cleanup Events River, creek, and beach cleanup events are an excellent way to get the public involved with water quality programs and to educate them about how pollutants, including trash, reach the waterways through the storm drain system. During this reporting period there were five major cleanup

3-4 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report events that had staging sites at several locations throughout the SLR watershed. A total of 880 volunteers removed over 7,200 pounds of trash and debris from coastal beaches and inland sites along the San Luis Rey River. Table 3-4 below provides summary information about these cleanup events.

Table 3-4. River, Creek and Beach Cleanup Event Summary. # of Participants # of Total # of Date Name Location Pounds Inland Coastal Participants Sites Sites Removed 7/06/2009 Morning After Mess Oceanside Harbor 71 71 476 Oceanside Beach 9/19/2009 Cleanup South side of Pier 410 410 880 San Luis Rey River 11/07/2009 Cleanup Inland River Sites 154 154 5,500 Oceanside Beach 11/07/2009 Cleanup Harbor South Jetty 57 57 175 Oceanside Beach 4/25/2010 Cleanup South side of Pier 188 188 205 Totals 154 726 880 7,236

North County Storm Water Program Since the initiation of the ERS Workgroup in 2007-08 the San Luis Rey Copermittees have been attending bi-monthly meetings of the ERS Workgroup collaborating with all 21 Copermittees on regional stormwater education programs. Therefore the NCSWP group combined efforts with the ERS Workgroup during the FY 08-09 reporting period and has discontinued meeting.

San Luis Rey Watershed Council The SLR Watershed Copermittees continued participating in regular meetings of the San Luis Rey Watershed Council (SLRWC) during this reporting period. The SLRWC is a partnership of local landowners, agricultural growers, Native American Tribal bands, community and environmental organizations, government agencies, and special districts with ties to the watershed. The SLRWC’s primary goal is to keep stakeholders apprised of issues and projects concerning the SLR Watershed and to develop and implement a comprehensive resource management plan for the SLR watershed. During FY 2009-10 the SLRWC was awarded nonprofit status by the Federal Internal Revenue Service. The SLRWC can now submit grants on behalf of the watershed stakeholders and move toward implementing priority projects identified by the members. Staff from two SLR Copermittees (Oceanside and County of San Diego) fill seats on the Board of Directors of the organization.

Pet Waste Surveys Since FY 2005-06 the SLR and Carlsbad Copermittees have collected and analyzed pet waste survey data and implemented pet waste pilot projects in areas where pet waste accumulates. During this reporting period compilation of Pet Waste Surveys was discontinued for the following reasons: • Data analyzed from north county pet waste surveys collected during previous reporting periods showed no significant changes in survey answers.

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• Barriers to picking up pet waste were clearly identified through survey data collected from activity SLR-004 Pet Waste Removal Pilot Project Along San Luis Rey Recreation Trail. Since survey data seems to be consistent, the SLR Copermittees determined it best to focus efforts on implementation of pilot projects where pet waste accumulates and to address the barriers that prevent people from picking up their pet waste. Some Copermittees distributed pet waste bag dispensers at community events encouraging people to pickup after their pets.

Project Clean Water Project Clean Water (PCW) is a water quality resource for the San Diego County region including Municipal NPDES Copermittees and the public. PCW, initiated in July 2000, established a framework for the broad-based and collaborative development of solutions to local water quality problems. PCW seeks to actively involve a multitude of stakeholders in exploring water quality problems, their causes, and their solutions. It was formed under the guidance of a Technical Advisory Committee made up of local stormwater-related professionals. For more details on the development of PCW refer to the FY 2007-08 SLR WURMP Annual Report.

One component of PCW is the PCW website which is accessible to the public and is promoted for use by the public to gather information about San Diego County watersheds. There are several web pages that provide information on San Diego’s Watersheds, programs and laws related to urban runoff, education information and how to report water pollution. This website provides Best Management Practices information for both residential and industrial/commercial audiences (http://www.projectcleanwater.org/bmp/ ).

PCW features a page devoted to the SLR WMA, with details on the watershed, major pollutants, and organizations related to water quality. Additionally the webpage also offers links to relevant documents such as the WURMP and WURMP Annual Reports. During FY 2009-10 the hits for the SLR Watershed page totaled 2,859 and there were also 536 hits on the SLR WURMP document.

Regional Education and Residential Sources Workgroup The Regional Education and Residential Sources Workgroup (ERS Workgroup), was formed during FY 2007-08 under the auspices of the MOU between the 21 San Diego County Copermittees. During FY 2009-10, the ERS Workgroup was co-chaired by the City of Oceanside and City of Imperial Beach with support from the San Diego Regional Airport Authority as Secretary. The ERS Workgroup met six times during FY 2009-10. A list of meeting dates, locations, agenda items and accomplishments are provided in the Regional Urban Runoff Management Program (RURMP) Annual Report scheduled to be submitted to the RWQCB in January 2011.

During FY 2007-08, the ERS Workgroup developed a Regional Residential Education Plan (Plan) which was submitted to the Regional Water Quality Control Board as part of the March 2008 RURMP. During FY 2009-10 the SLR Copermittees, in conjunction with County Copermittees, continued to implement components of this Plan. A brief summary of the accomplishments of the ERS Workgroup are mentioned below.

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Regional Branding Regional Branding was finalized in FY 2008-09 which includes an icon and the name Think Blue San Diego Region which is how the ERS Workgroup identifies itself to the public. Regional branding helps to unify the region’s stormwater outreach messages. During this reporting period the logo was officially released for use by San Diego County Copermittees for regional stormwater activities, outreach materials, and promotional items.

EnviroFair at the San Diego County Fair During this reporting period Copermittees collectively staffed a table at EnviroFair held on June 19, 2010 during the San Diego County Fair. This event is an excellent opportunity for Copermittees to collect event surveys that gather knowledge and awareness from event attendees related to stormwater related activities. Event survey results have been tabulated and are summarized in the RURMP AR due to the RWQCB in January 2011.

Mass Media The ERS Workgroup continues to purchase media buys at various outlets. These include radio and television ads, as well as Public Service Announcements shown at movie theatres throughout the county.

3.4 Collaborative Land-Use Planning Efforts This section describes collaborative land use planning efforts within the San Luis Rey Watershed during FY 2009-10. The SLR Copermittees have identified enhanced education and cross- jurisdictional communication as key elements in lessening the potential watershed impacts resulting from jurisdictional land use decisions. Efforts are ongoing to further integrate watershed priorities into jurisdictional land use planning processes and to search for innovative opportunities to enhance collaboration at the watershed scale. JURMP annual reports contain information on individual Copermittee efforts to integrate watershed and water quality principles into local general plans and ordinances.

Land Acquisitions (Activity ID# SLR-012) During this reporting period the County of San Diego acquired 167.1 acres of land within the San Luis Rey Watershed. These land acquisitions will provide a significant water quality benefit, preclude development from occurring, and allow land to retain its natural perviousness. All SLR Copermittees support the purchase of these lands with this purpose in mind.

3.4.1 Cross-Jurisdictional Communication The primary means of collaborative land use planning is the clear and timely communication of pending land use decisions among the SLR Copermittees. One way this is accomplished is through notification of the availability of environmental documents and public hearings pursuant to the California Environmental Quality Act (CEQA). To improve awareness of pending projects beyond CEQA requirements, the Copermittees adopted a Memorandum of Understanding in 1991 that establishes guidelines for the notification of land use and development actions approved by Copermittee agencies. Notification triggers are based on considerations of project size, location, and type as specified in the MOU. Each jurisdiction typically provides neighboring jurisdictions with the opportunity to review and comment on

3-7 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report discretionary projects located near jurisdictional borders. Through this process, the SLR Copermittees have the ability to participate in and comment on land use planning efforts outside of their jurisdiction. By working together and creating partnerships, Copermittees provide an opportunity to ‘catch’ potential watershed issues from adjacent jurisdictions. Through enhanced communication and strong relationships, the Copermittees are able to better address watershed needs as a whole.

3.5 Updated 5-year Strategic Plan As mentioned at the beginning of this section the SLR Copermittees are responsible for identifying and implementing Watershed Water Quality and Education Activities that address the high priority water quality problems in the SLR WMA. Utilizing the Collective Watershed strategy the SLR Copermittees have identified activities that will address priority pollutants in the SLR WMA. See Table 3-5 for an updated 5-year SLR WURMP Strategic Plan.

3.5.1 New Watershed Activities Three new watershed activities not listed in the FY 2008-09 SLR WURMP Annual Report 5- year strategic plan were implemented during this reporting period: • SLR-019: Hellhole Canyon County Park Educational Signage • SLR-021: Fallbrook Community Center Artificial Turf • SLR-022: Residential Rain Barrel Subsidies and Distribution

Following is one additional activity not listed in the FY 2008-09 SLR WURMP Annual Report 5-year strategic plan that was not implemented during this reporting period and is planned for implementation in FY 2010-11: • SLR-020: Residential Composting Workshop

These new activities are reflected in the updated 5-year SLR WURMP Strategic Plan. Activity Summary Sheets for these new activities are provided in Appendix A of this annual report.

3.5.2 Updated 5-Year Strategic Plan Table 3-5 at the end of this section provides an updated 5-year Strategic Plan that reflects the status of watershed activities and includes new activities planned for future reporting periods. The updated 5-year strategic plan supersedes the version presented in the FY 2008-09 SLR WURMP Annual Report.

3.6 TMDL BMP Implementation The TMDL for Indicator Bacteria Project I – Twenty Beaches and Creeks in the San Diego Region (Bacteria I TMDL) was adopted by the SDRWQCB in February 2010. The Pacific Ocean Shoreline at the San Luis Rey River mouth is specifically addressed in this TMDL. Final approval by the SWRCB and EPA are pending. In preparation for the Bacteria I TMDL, the City of Oceanside, with matching fund support provided by the County of San Diego and the City of Vista, was awarded a Proposition 50 Clean Beaches Initiative grant to conduct a bacteria source tracking study along the lower San Luis Rey River. For more information about this project refer to Appendix A, Activity SLR-010.

3-8 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report

Table 3-5. SLR Watershed Five-Year WURMP Strategic Plan FY 2009-10 Update. Priority HA Pollutant Implementation Schedule SAN LUIS REY RIVER WATERSHED 903.1 903.1 903.2 903.3 Bacteria Bacteria Nutrients Nutrients FY 2007-08 FY 2008-09 FY 2009-10 FY 2010-11 FY 2011-12 Watershed Activities Implemented in FY 2009-10 and Planned for Implementation in FY 2010-11 and FY 2011-12 SLR-001: SLR Watershed Water Quality Monitoring Program x x x M M M M M SLR-002: Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall-Signage & Cleaning Frequency x x WQ SLR-003: Modular Wetland Installation at Oceanside Harbor Boat Wash Outfall x x P WQ M M M SLR-004: Pet Waste Removal Pilot Project Along San Luis Rey Recreation Trail x x WE WE WQ WE WQ WE WQ SLR-005: Pet Waste Bag Dispenser Program in County Parks x x WQ WQ WQ WQ WQ SLR-006: Agricultural and Nursery Operations Runoff Assessment & Monitoring Program x x x x x M SLR-007: Water Quality Runoff Management and Agricultural Waiver Workshop x x x x x WE WE WE SLR-008: Guajome Lake Water Quality Monitoring Program x x x M M M M M SLR-009: Nutrient Source Identification and Abatement: Guajome Lake x x M S WQ M S WQ M S WQ M S * SLR-010: Lower SLR River Bacteria Source Tracking Study x x M S M S M S M S M S SLR-011: LID & Watershed Planning Education for Community Planners & Sponsor Groups x x x x WE WE SLR-012: Land Acquisitions x x x WQ WQ WQ ** ** SLR-013: Harbor Boat Wash Camera x x WQ A SLR-014: Harbor Boat Wash Coin Operated Water Dispenser x x WQ P WQ P WQ SLR-015: Focused Horse Property Outreach in the SLR River Watershed*** x x x x WQ WE P WQ WE WQ WE WQ WE SLR-016: Focused Grove and Nursery Outreach in the SLR River Watershed x x x WE WQ WE WQ WE SLR-017: Focused Onsite Wastewater System Outreach in the SLR River Watershed x x x x WE WQ WE WQ WE SLR-018: Sports Park Watershed Education Signs x x x WE P WE SLR-019: Hellhole Canyon County Park Educational Signage x x WE SLR-020: Residential Composting Workshop x WE P WE SLR-021: Fallbrook Community Center Artificial Turf x WQ SLR-022: Residential Rain Barrel Subsidies and Distribution x x WQ WE P WQ WE Potential Future Activities SLR River Bacteria BMP Implementation x x Contingent upon funding for prioritized BMPs Low Impact Development and SUSMP Workshop x x x x x Pilgrim Creek Source ID x x

* Future activity will be assessed based upon program results WQ = Watershed Water Quality Activity ** Unable to project land acquisitions in advance WE = Watershed Education Activity *** Activity previously named Community Based Residential Horse Property Pilot Project WQ = Watershed Water Quality Activity (not in active implementation) WE = Watershed Education Activity (not in active implementation) M = Watershed Water Quality Monitoring Activity S = Source ID/Characterization Activity P = Activity in Planning Stages A = Activity Assessment

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4 EFFECTIVENESS ASSESSMENT This section summarizes the effectiveness of all of the WURMP activities conducted during FY 2009-10. In addition, there is an assessment of the effectiveness of the collective WURMP implementation.

Each activity summary sheet in Appendix A of the FY 2009-10 SLR WURMP Annual Report identifies specific targeted outcomes (Levels 1-6) that will be assessed and the measures and methods that will be used to gauge activity effectiveness. Each watershed activity is unique and its impacts on water quality are equally distinctive. As a result, measurable outcomes do not always follow a linear path (assessing effectiveness at each of the six outcome levels). For example, a capital project may result in pollutant load reductions (Level 4), but may not have any bearing on changes in the awareness or behavior of a target population (Levels 2 and 3). It is also unlikely that the implementation of an individual watershed activity would be measureable at levels 5 or 6 which are typically measureable through cumulative assessments. The assessment levels are defined below. Definitions are from the Municipal Permit.

Effectiveness Assessment Outcome Level 1 - Compliance with Activity-based Permit Requirements – Level 1 outcomes are those directly related to the implementation of specific activities prescribed by Order 2007-0001 or established pursuant to it.

Effectiveness Assessment Outcome Level 2 - Changes in Attitudes, Knowledge, and Awareness – Level 2 outcomes are measured as increases in knowledge and awareness among target audiences such as residents, businesses, and municipal employees.

Effectiveness Assessment Outcome Level 3 - Behavioral Change and BMP Implementation – Level 3 outcomes measure the effectiveness of activities in affecting behavioral change and BMP implementation.

Effectiveness Assessment Outcome Level 4 - Load Reductions – Level 4 outcomes measure load reductions which quantify changes in the amounts of pollutants associated with specific sources before and after a BMP or other control measure is employed.

Effectiveness Assessment Outcome Level 5 - Changes in Urban Runoff and Discharge Quality– Level 5 outcomes are measured as changes in one or more specific constituents or stressors in discharges into or from MS4s.

Effectiveness Assessment Outcome Level 6 - Changes in Receiving Water Quality – Level 6 outcomes measure changes to receiving water quality resulting from discharges into and from MS4s, and may be expressed through a variety of means such as compliance with water quality objectives or other regulatory benchmarks, protection of biological integrity, or beneficial use attainment.

The activity summary sheets presented in Appendix A include effectiveness assessment summaries for each water quality and education activity, as required in the Municipal Permit, I.2.a.(1).

4-1 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report 4.1 Assessment of Overall WURMP Effectiveness

4.1. Permit Compliance (Level 1) A basic Municipal Permit compliance assessment is presented in Table 4-1. This table describes minimum permit requirements set forth in the Municipal Permit, whether or not compliance was achieved by the SLR Copermittees in FY 2009-10, and where in this report, required compliance points are fulfilled or described. As shown in the table, the Copermittees were in compliance with all WURMP related Municipal Permit requirements during FY 2009-10.

Table 4-1. SLR WURMP Municipal Permit Compliance Assessment. Targeted Outcome Measure Report Section Update any watershed maps. Completed during FY 2007-08, no updates Section 1.2 necessary this FY. Update watershed water quality assessment, including identification of the watershed’s water quality problems Completed. Section 2.1 and high priority water quality problem(s) during the reporting period. Identify the likely sources, pollutant discharges, and/or other factors causing the high priority water quality Completed. Section 2.2 problems within the watershed. Update list of potential Watershed Water Quality Completed. Section 3.5 Activities. Identify and describe the Watershed Water Quality Activities implemented by each Copermittee during the Completed. Section 3.1 reporting period. Update list of potential Watershed Education Activities. Completed. Section 3.5 Identify and describe the Watershed Education Activities implemented by each Copermittee during the Completed. Section 3.2 reporting period. Describe the public participation mechanisms used during the reporting period and the parties that were Completed. Section 3.3 involved. A description of Copermittee collaboration efforts. Section 1.1, Completed. Section 3.4 Minimum quarterly meetings of the SLR WURMP Five (5) meetings Section 1.1.1 Workgroup. Describe the efforts implemented to encourage Completed. Section 3.4 collaborative, watershed-based, land-use planning. Describe all TMDL activities implemented (including Not applicable at this BMP Implementation Plan or equivalent plan activities) Section 3.6 time. for each approved TMDL in the watershed.

4.1.1 Cumulative Impacts of Activities (Levels 2, 3, and 4) Activity Assessments During FY 2009-10, there were 19 activities in various stages of implementation, planning or assessment. Four activities focused solely on water quality, four focused solely on education, two focused on water quality and education, four focused on monitoring, and/or source identification and four activities were in planning stages during FY 2009-10 (SLR-014, SLR-018, SLR-020, and SLR-22). SLR-013 was in an assessment phase during this reporting period. All activities

4-2 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report focused on one or more of the high priority water quality problems in the SLR Watershed (bacteria and nutrients).

Although more water quality data are available after three years of Regional Monitoring under this Municipal Permit, it is not feasible to link changes in discharge or receiving water directly to most of the watershed activities. At this point, several questions may be helpful in assessing the cumulative impacts of the watershed activities. Table 4-2 summarizes the assessments of the water quality and education activities that were in active implementation phase during this reporting period in an effort to provide a collective picture of the overall effectiveness of the watershed activities. The activities will be related to historical and recent water quality data and examined by hydrologic area in subsequent sections.

4-3 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report Table 4-2. Summary of Watershed Water Quality and Education Activities in the SLR WMA. High Priority Water Level 2 – Changes in Activity Level 3 - Change Level 4 - Load Activity Quality Knowledge/ Sources Identified? Number in Behavior Reduction Problem(s) Awareness Addressed San Luis Rey Not applicable, Watershed Water Bacteria, Not applicable, All sources have not Not as part of the SLR-001 monitoring activity Quality Monitoring Nutrients monitoring activity only been identified monitoring program only Program BMPs implemented during FYs 07-08, 08- 09, and 09-10; it appears that loads have Yes, bacteria been reduced as Bacteria Reduction generated due to illustrated through Pilot Program at SLR-003 proximity of boat reductions in Oceanside Harbor Bacteria No No washing and RV exceedances of Coastal Boat Wash Outfall sewage dump station Storm Drain Monitoring – Modular Wetland to storm drain. Program Action Levels in the storm drain and exceedances of AB411 standards in the receiving water. Controlled experiment will be Cleanup contractor Pet Waste completed in early used to remove pet Removal Pilot Yes, anticipated but not FY10-11, Yes, pet waste in waste from trail prior to SLR-004 Project Along San Bacteria measured. complete results recreational areas. installation of BMPs; Luis Rey to be reported in removed 23.25 pounds Recreational Trail next Annual of pet waste (229 piles) Report Yes, in general, In total, estimated that Pet Waste Bag Yes, via based on usage more people Yes, pet waste in 6,738 pounds of pet SLR-005 Dispenser Program Bacteria of bags and positive picking up after parks. waste were removed in County Parks examples their pets from the watershed.

4-4 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report

High Priority Water Level 2 – Changes in Activity Level 3 - Change Level 4 - Load Activity Quality Knowledge/ Sources Identified? Number in Behavior Reduction Problem(s) Awareness Addressed Yes, measured through pre and post tests, pre Water Quality test scores averaged Yes, nurseries have Runoff Nutrients, 5.48 and post test been identified as SLR-007 Management and None measured None measured Bacteria scores averaged 8.36, potential sources of Agricultural Waiver representing an nutrients and bacteria Workshop increase in knowledge of 61% Attempting to characterize sources; potential sources Guajome Lake Not applicable, include residential Nutrients, Not applicable, Not applicable, SLR-008 Water Quality monitoring activity areas, commercial Bacteria monitoring activity only monitoring activity only Monitoring Program only nurseries, and commercial and residential horse facilities Study area was On going via expanded and 25 Measured through assessments nurseries in the Twenty-five nurseries assessments during Nutrient Source during inspections; upstream area were inspected; BMPs inspections; all sites but Identification and BMP compliance inspected; although implemented as a result SLR-009 Nutrients one showed Abatement: improved or four nurseries were of inspections will likely improvement or similar Guajome Lake stayed the same found to have BMP reduce and abate scores from previous at all facilities but violations, there were sources. reporting periods. one. no direct sources of nitrates identified. Not at this time, Lower San Luis Once sources are Not applicable, ongoing study using Rey River Bacteria Not applicable, identified, reduction and SLR-010 Bacteria monitoring activity genetic analysis to Source Tracking monitoring activity only abatement activities will only determine bacteria Study be pursued sources 167.1 acres acquired Bacteria, SLR-012 Land Acquisitions None measured None measured Potential development and preserved by the Nutrients County of San Diego.

4-5 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report

High Priority Water Level 2 – Changes in Activity Level 3 - Change Level 4 - Load Activity Quality Knowledge/ Sources Identified? Number in Behavior Reduction Problem(s) Awareness Addressed In the Pre and Post Tests, a question regarding ideas for BMPs to Focused Horse prevent pollution Pre and Post Tests Property Outreach Bacteria, showed that Residential Equestrian SLR-015 show improvements in Not measured in the San Luis Rey Nutrients participants were Properties knowledge River Watershed able to identify more positive behavioral changes after the workshops. Pre and Post Test show Focused Grove and SLR-016 Nutrients improvements in None measured Groves and Nurseries None measured Nursery Outreach knowledge None measured, in the future it may be Focused Onsite Pre and Post Tests were Bacteria, Three vouchers Onsite Wastewater possible to estimate SLR-017 Wastewater administered but no pre Nutrients were distributed. Systems load reductions through System Outreach tests were returned calculated volumes of sewage removed. Hellhole Canyon County Park Nutrients, Anticipated but not SLR-019 None measured No No Educational Bacteria quantified Signage Reduction in fertilizer Yes, fertilizer and Fallbrook usage by 120 pounds irrigation associated SLR-021 Community Center Nutrients None None per year and irrigation with natural turf Artificial Turf by 170,000 gallons management annually

4-6 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report High Priority Water Quality Problems All activities addressed high priority water quality problems as identified in the WURMP. Of the activities in active implementation, bacteria was specifically addressed in 11 activities and nutrients in 10 activities. A combination of water quality, education, source identification and monitoring activities appear effective at addressing identified high priority water quality problems in the San Luis Rey HU.

Level 2 - Changes in Knowledge and Awareness Changes in knowledge and awareness of water quality problems were measured in six of the water quality and education activities implemented during this reporting period. Additionally, increases in knowledge are assumed in two activities with no mechanism in place to measure the changes.

Six of the watershed education activities conducted during the reporting period implemented specific measures to assess changes in knowledge and awareness.

• The Pet Waste Bag Dispenser Program in County Parks accounts for changes in knowledge based on changes in behavior. In FY 2009-10, there were 33,915 bags used from the 11 stations in the SLR Watershed. • The Water Quality Runoff Management and Agricultural Waiver Workshop measured changes in knowledge by administering pre- and post-workshop surveys. Scores increased in the post-workshop survey by 61% over the pre-workshop survey indicating an increase in knowledge. • The Nutrient Source Identification and Abatement in the Guajome Lake Drainage Area also quantified changes in knowledge during inspections. Standardized assessment ratings were given to each facility during inspections over the three years of implementation. A comparison of these numbers over time indicates that overall all sites but one showed improvement or similar scores from previous years. • The Focused Horse Property Outreach in the San Luis Rey River Watershed illustrated increases in knowledge by administering pre- and post-workshop surveys at the workshop conducted on February 3, 2010. These surveys showed increases in knowledge related to people being aware that they live in a watershed, stormwater treatment (or lack of), and the contribution of horse manure to water quality problems. • The Focused Grove and Nursery Outreach assessments included pre- and post- workshop surveys to assess knowledge of general watershed principles and changes in awareness of proper irrigation and fertilization practices. An increase was noted in general watershed concepts and in knowledge pertaining to agriculture as a potential source of pollutants. • The Focused Onsite Wastewater System Outreach was a public workshop focused on septic system maintenance. Attendees at the workshop were asked to complete pre- and post-workshop surveys to assess changes in knowledge. There were eight post workshop surveys completed, however there were no pre-workshop surveys returned therefore the intended assessment was not feasible.

Several of the activities can be assumed to result in increased awareness, although a formal mechanism to measure the change may not be feasible. For example, knowledge was likely increased through the implementation of pet waste bag dispensers and signage at County Parks,

4-7 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report but was not quantified. Similarly, with the installation of educational signage in Hellhole Canyon Park, an increase in knowledge is anticipated, but not measured. The activities that did not result in increased awareness were designed solely to implement BMPs targeting load reductions. These activities generally focused on public lands and implemented BMPs to reduce the effects of bacteria, nutrients, and other pollutants on receiving waters.

Collectively, the water quality activities are focused efforts leading to localized changes in knowledge and awareness. However, the education activities are broad based, applicable to all hydrologic areas in the watershed and are expected to provide for a general increase in knowledge in the San Luis Rey River Watershed over time.

Level 3 – Changes in Behavior, Implementation of BMPs A change in behavior was observed and BMPs were implemented in three of the activities implemented during the Fiscal Year. One additional activity also assumed a change in behavior with no mechanism to measure. Each change in behavior is described below. • In the activity targeting pet waste in County Parks there was evidence that people continued utilizing the pet waste bags from installed dispensers to pick-up and properly dispose of pet waste. • In the Nutrient Source Identification and Abatement activity focusing on the Guajome Lake drainage area within the County, changes in behavior were assessed by tracking the number of violations observed during inspections of the nursery facilities. In most cases, BMP compliance has been shown to improve over time. • The activity focused on Horse Property Outreach, the pre and post surveys included a question regarding BMPs to prevent pollution. Survey scores showed that participants were able to identify more positive behavioral changes after the workshops. • The activity designed around Focused Onsite Wastewater System Outreach illustrated the intent of the participants to positively change their behavior in that three vouchers were distributed that would pay for a portion of the pumping costs for residents’ onsite wastewater systems.

Sources addressed through these activities included nurseries, pet waste, horse properties, and recreational areas. The connection of the BMPs to the specific water quality problems are further discussed below.

Level 4 – Load Reductions In general, water quality and monitoring activities appear effective at identifying and abating sources of high priority water quality problems in the SLR HU.

The Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall included activities designed to reduce bacteria at the outfall. The source of the bacteria has been well characterized. In previous reporting periods the City of Oceanside increased the cleaning frequency at the outfall, provided more educational signage at the boat wash, implemented a new Modular Wetlands BMP, and installed a video surveillance camera to monitor activity at the station. Since the implementation of these activities exceedances at the outfall do still occur, but flow rates are usually less than one gallon per minute (gpm) and receiving water exceedances

4-8 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report rarely occur (two total coliform and fecal coliform exceedance of AB411 single-sample standards throughout FY 2009-10).

The Pet Waste Project addressing behaviors along the San Luis Rey Trail included cleanup of pet waste along the trail. A cleanup contractor was used to remove pet waste from trail prior to installation of BMPs. In total, 23.25 pounds of pet waste (229 piles) was removed.

The Pet Waste Bag Dispenser Activity in County Parks and Pet Waste Removal Project along the SLR Trail have caused a direct, measurable reduction in pet waste, estimated at nearly 6,738 pounds of pet waste during FY 2009-10.

The acquisition of land by public agencies, specifically the County of San Diego, will provide for preservation of the land in the future, reducing the negative effects of development on the watershed. The source has been identified as new development and by acquiring the land for public use, the pollutants associated with this source have been prevented. Although load reductions are not quantifiable, the 167.1 acres acquired by the County this fiscal year will contribute to preservation of existing water quality within the watershed.

In the activity that installed Artificial Turf at the Fallbrook Community Center, estimations of water and fertilizer savings were calculated. The annual use of irrigation water at the facility was reduced by 18% (approximately 170,000 gallons) and the annual amount of fertilizer used decreased by 25% (approximately 120 pounds). The reductions in the amount of fertilizers used and in the transport mechanism both play important roles in reducing dry weather nutrient loads.

In addition to the six watershed water quality activities actively implemented during the reporting period, there were four monitoring activities occurring in an attempt to characterize and identify sources. Two of these activities are designed to address bacteria and two that address bacteria and nutrients. Each of the monitoring activities currently supports or will support future watershed activities.

4.1.2 Integrated Assessment: Level 5 (Changes in Discharge Water Quality) and Level 6 (Changes in Receiving Water Quality)

4.1.2.1 Warner Valley Hydrologic Area With minimal development in the HA, it is expected that anthropogenic impacts to water quality are limited. Although water quality data for the HA is minimal, the available data and amount of development in the lower parts of the watershed support the Copermittees decision to focus efforts elsewhere in the watershed to maximize positive impacts of activities.

4.1.2.2 Monserate Hydrologic Area With minimal development in the HA, it is expected that anthropogenic impacts to water quality are limited. Although water quality data for the HA is minimal, the available data and amount of development in the lower parts of the watershed support the Copermittees decision to focus efforts elsewhere in the watershed to maximize positive impacts of activities.

4-9 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report 4.1.2.3 Lower San Luis Hydrologic Area As discussed in Section 2.2, residential and agricultural land uses make up the highest percentage in the lower watershed whereas open space and vacant land make up most of the upper watershed. The Monserate and Warner Valley HAs consist of over 70% vacant land, open space, and preserve. Urban pollutant sources and anthropogenic influences appear to be very limited in the upper portions of the watershed. Moreover, there are only a few monitoring stations in these areas and very few exceedances have been observed to date (SLR WURMP 2008). For these reasons, the watershed activities and monitoring programs focus primarily on the Lower San Luis HA and are discussed below.

4.1.2.3.1 Water Quality The high priority water quality problems in the Lower San Luis HA identified in the SLR WURMP 2008 are bacteria and nutrients. Recent monitoring efforts performed in FY 2007-08 and FY 2008-09 provide new information specific to the HA, as there was a TWAS installed towards the bottom of the Bonsall HSA (FY 2007-08 only) in addition to the historical MLS. Data was collected during ambient (dry) and storm (wet) conditions at the TWAS and MLS. Due to the rotational nature of monitoring required at these stations in the Permit, there has been no additional monitoring at MLS or TWAS sites over the past year. However, the City of Oceanside and the County of San Diego continued sampling in the receiving water and tributaries of the Lower San Luis HA for WURMP Activity SLR-001, the SLR Watershed Water Quality Monitoring Program. Monitoring to assess urban runoff contribution in the Lower San Luis HA was completed through the DWM and CSDM programs as well as through several WURMP activities.

Bacteria Bacteria have been identified as a high priority water quality problem in the SLR WURMP 2008. This decision is further supported by recent water quality data collected during ambient and storm conditions. The SLR Copermittees have implemented several activities designed to address identified sources of bacteria in the watershed. There are also several monitoring and source identification activities related to bacteria in the planning or implementation phase.

During this reporting period, four water quality activities focused on the abatement of specific sources of bacteria: the Pet Waste Removal Pilot Project along the San Luis Rey Recreational Trial (SLR-004), the Pet Waste Bag Dispenser Program in County Parks (SLR-005), Land Acquisitions in the County (SLR-012), and the Focused Horse Property Outreach in the San Luis Rey River Watershed (SLR-015).

During this permit cycle several activities have been designed to address the pollutant sources identified at the Oceanside Harbor Boat Wash Outfall. Because concentrations of bacteria continued to exceed action levels on occasion, the project has been adaptively managed to incorporate various BMPs intended to reduce bacteria concentrations at the outfall. Previously, antimicrobial fabric had been tested as a BMP to reduce bacteria at the outfall, with limited success. Implementation during FY 2007-08 involved increased cleaning of the storm drains in the area and the addition of signage at the boat wash and RV dump areas to encourage people to utilize the facilities properly. During FY 2008-09, additional BMPs were implemented, designed to reduce bacteria concentrations through the use of a modular wetlands system (SLR-003) and through the installation of a video camera (SLR-013). This project is a good example of the use

4-10 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report of an iterative process to address an identified problem in the watershed. Although the activities have had some success in their effectiveness to address bacteria, the problem has not been entirely eliminated at this location. The City of Oceanside will continue to investigate ways to reduce the bacteria concentrations at this location. Preliminary Level 5 assessments have been performed at this outfall. Results indicate that fecal coliform and enterococcus concentrations have been reduced by the implementation of the various BMPs at the location, while the total coliform concentrations have remained relatively consistent. For further details on the assessment methods, refer to the Activity Sheet in Attachment A of this report.

The SLR-004 and SLR-005 activities have had direct and positive impacts on bacteria in the HA during this reporting period. The project along the SLR Recreational Trail has examined the ways to positively influence behavior during this reporting period. The existing pet waste dispenser stations in County parks are estimated to have reduced the amount of pet waste entering the watershed by 6,738 pounds over the reporting period. The installation and use of these BMPs has proven effective at reducing the amount of fecal bacteria entering the watershed and its water bodies. For this reason, the City of Oceanside and the County will continue to service pet waste bag dispensers at these locations during the coming years consider installing additional dispensers where needed.

One activity focused on residential horse properties this year. The activity focused on outreach to horse owners and is expected to result in BMP implementation by residents in the future. Through implementation of these BMPs, it is expected that there will be less contact with rainwater and pollutants generated on residential horse properties, thereby reducing the impacts of these activities on stormwater flows, specifically related to bacteria and nutrients.

During this reporting period, five education activities focused on the abatement of specific sources of bacteria: the Pet Waste Removal Pilot Project (SLR-004), the Water Quality Runoff Management and Agriculture Waiver Workshop (SLR-007), the Focused Horse Property Outreach in the San Luis Rey River Watershed (SLR-015), Focused Onsite Wastewater System Outreach (SLR-017) and the Hellhole Canyon County Park Educational Signage (SLR-019).

During previous reporting periods the SLR-004 project implemented BMPs to educate people using the San Luis Rey Recreational Trail and used Community-Based Social Marketing (CBSM) techniques to determine the most effective methods of education and BMP implementation targeting pet waste along the trail. The activity was initiated during FY 2007-08 and continued during this reporting period. The activity has been effective in educating residents about the importance of picking up after their pet. BMP installation and focused education outreach to the target audience along the trail will be performed in FY 2010-11.

Other outreach activities focused on sources of bacteria such as agriculture, via fertilizer, compost, and trash management; residential horse properties through manure management education; and septic systems, through efforts to implement a voucher program to partially subsidize pumping of onsite wastewater systems.

In addition to the required water quality and education activities, the watershed Copermittees also invested significant resources in monitoring activities. Four of the monitoring activities

4-11 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report include sample collection and analyses pertaining to bacteria concentrations and sources in the watershed. These efforts include: the SLR Watershed Water Quality Monitoring Program (SLR-001), monitoring at the Harbor Boat Wash outfall (SLR-003), the Guajome Lake Water Quality Monitoring Program (SLR-008), and the Lower SLR River Bacteria Source Tracking Study (SLR-010). These monitoring programs are designed to complement ongoing activities in the watershed and will provide useful source information in the future. The SLR-001 monitoring project was designed to identify and characterize the constituents of concern affecting water quality in the lower watershed. The SLR-003 monitoring activity assesses the effectiveness of the various BMPs implemented at the Boat Wash. The SLR-008 project was designed to assess sources of the high priority water quality problems in the watershed, specifically targeting nurseries and agricultural operations. The SLR-010 activity is an intensive bacteria source tracking study that is designed to provide insight into specific sources of bacteria in the watershed. Specific data and analyses pertaining to each activity are provided in Appendix A of this report.

Through the implementation of a combination of water quality and education activities, complemented by specific monitoring projects, the SLR Copermittees are moving forward in addressing the bacteria problems in the watershed. By implementing practical activities that are targeting identified sources of bacteria, the Copermittees are effectively addressing bacteria problems in the watershed, with demonstrated load reductions resulting. The combination of activities is having significant positive impacts on the watershed. However, this does not always translate to changes in discharge and/or receiving water quality, especially related to bacteria. With many diverse sources of bacteria suspected in the watershed, some identified and others not, the Copermittees are implementing activities to address known sources and conducting monitoring activities to identify or confirm other sources.

Various amounts of discharge water quality data related to bacteria have been collected as part of several monitoring programs in the watershed. However, the data have not been assessed in relation to trends. Therefore, at this time it is not feasible to link the watershed activities and program to changes in discharge water quality. Because data collected as part of SLR-003 and SLR-008 are indicating improvements in water quality, this data may be further assessed in the future to address changes in discharge water quality (Level 5).

Because there was no additional data collected at the MLS or TWAS stations during FY 2009- 10, trend analyses have not changed over the past year and are based on data collected previously. Trend analyses of the monitoring results at historical mass loading stations for bacteriological constituents indicates significantly increasing trends for total coliform (p < 0.001), fecal coliform (p = 0.002), and enterococci (p = 0.004) over the monitoring period (Weston 2010). These samples are collected during storm events only. These trends are illustrated in Figure 4-3 below.

4-12 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report

100,000,000 San Luis Rey 10,000,000 River Sen's Slope=719 1,000,000 100,000 10,000 1,000 100 Total Coliform (MPN/100ml) Coliform Total 10 94 03 06 09

100,000,000 ) l San Luis Rey m 10,000,000 0 River 0 1 / 1,000,000 Sen's Slope =719 N

P 100,000 M ( 10,000 m r o f i 1,000 l o C

100 l Significant Trend a

c Water Quality Benchmark

e 10

F Upper and Lower 1 90% Confidence Interval 94 03 06 09 10,000,000

) San Luis Rey l

m 1,000,000 River 0

0 Sen's Slope = 137 1 / 100,000 N P M (

10,000 i c c o

c 1,000 o r e t

n 100 E 10 94 03 06 09 Figure 4-1. Trend Analysis for Bacteriological Constituents at the SLR MLS.

Nutrients Nutrients have also been identified as a high priority water quality problem in the SLR Watershed. The decision to identify nutrients as a high priority problem is based primarily on the listing of Guajome Lake as impaired for nutrients on the 2006 303(d) listing.

During this reporting period, there were two monitoring and four water quality activities that were specifically focused on the sources of nutrients. These were chosen because the sources of the nutrients remain largely uncharacterized in the watershed. Nutrient-related monitoring activities occurring during the FY 2009-10 reporting period included the SLR Watershed Water

4-13 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report Quality Monitoring Program (SLR-001) and the Guajome Lake Water Quality Monitoring Program (SLR-008). In addition Copermittees implemented four water quality activities intended to identify and and/or address nutrient sources: Nutrient Source Identification and Abatement for Guajome Lake (SLR-009); the Focused Horse Property Outreach in the San Luis Rey River Watershed (SLR-015); the Focused Grove and Nursery Outreach in the SLR Watershed (SLR- 016); and the Fallbrook Community Center Artificial Turf Activity (SLR-021). Each of these activities is designed to assess sources of nutrients causing or contributing to water quality problems in the watershed. Results of each activity are presented in Appendix A.

Through the implementation of monitoring, source identification projects, and education activities, the SLR WURMP group is moving forward in addressing the nutrient problems in the watershed. In the future, it is expected that the combination of activities will have positive impacts on the watershed. However, this does not always translate to changes in discharge and/or receiving water quality. With many diverse sources of nutrients suspected in the watershed, the Copermittees are conducting monitoring activities to identify or confirm sources as a precursor to designing water quality and education activities in the future.

Various amounts of discharge water quality data have been collected as part of several monitoring programs in the watershed. Often, the data related to nutrients has been collected using field test kits. The data have been partially assessed in relation to spatial distribution in the watershed but have not been assessed in relation to trends. Section 2 of this report contains more detailed information on nutrient data collected in the watershed. At this time it is not feasible to link the watershed activities and program to changes in discharge water quality.

Because there was no additional data collected at the MLS or TWAS stations during FY 2009- 10, nutrient trend analyses have not changed over the past year and are based on data collected previously. With respect to nutrients, recent data indicate that nitrates no longer show significantly increasing trends at long term receiving waters monitoring stations during storm events. However, dissolved phosphorus, although well below action levels, shows a slight increasing trend. Figure 4-4 below illustrates the increasing ortho-phosphate trend during storm events. At this time, it is not feasible to link the watershed activities to receiving water data. Changes in water quality trends will take place slowly and will continue to be assessed in future years.

) 4 Significant Trend L

/ San Luis Rey g River Water Quality Benchmark m Upper and Lower (

s 3 Sen's Slope= 90% Confidence Interval u r 0.00859 o h p

s 2 o h P

d e

v 1 l o s s i D 0 94 03 06 09 Figure 4-2. Trend Analysis for Dissolved Phosphorus at the SLR MLS.

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Elevated total dissolved solids (TDS) concentrations are persistent throughout the San Luis Rey HU and most of San Diego County. Sources of the elevated TDS are suspected to be related to the region’s reliance on imported water and its relation to groundwater recharge in San Diego aquifers. As this is a region-wide problem, TDS has not been identified as a high priority water quality problem specific to the SLR WURMP.

Other Activities The Land Acquisitions activity (SLR-012) does not reduce existing loads, but is intended to prevent future loading of pollutants related to new development. Loading estimations are difficult to predict based on land use; however acquisition of the land for public use will prevent the development of commercial and residential areas on the land, both of which have been shown to contribute to bacteria loading. Land acquisition also helps maintain the natural conditions of the site, allowing for natural processes such as infiltration and pollutant uptake to continue. When land is developed, these natural processes are often reduced or eliminated by increasing impervious areas and channelizing or undergrounding stream systems. Preservation of the land will provide for less pollutant generation and may provide for continued pollutant removal, depending on the land acquired. This would directly apply to the bacteria and nutrient water quality problems identified in the WURMP.

Conclusions for the Lower San Luis HA During FY 2009-10, six water quality activities in the HA were in the implementation phase. These activities appear well designed to address high priority water quality problems in the watershed with four addressing bacteria and four addressing nutrients. During FY 2009-10, the six education activities in the HA addressed all high priority water quality problems in the HA, with five addressing bacteria and five addressing nutrients.

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5 CONCLUSIONS AND RECOMMENDATIONS

5.1 Conclusions for Warner Valley HA With minimal development in this HA, it is expected that anthropogenic impacts to water quality are limited. Although water quality data for this HA is minimal, the available data and amount of development in the lower parts of the watershed support the Copermittees decision to focus efforts elsewhere in the watershed to maximize positive impacts of activities.

5.2 Conclusions for Monserate HA With minimal development in this HA, it is expected that anthropogenic impacts to water quality are limited. Although water quality data for this HA is minimal, the available data and amount of development in the lower parts of the watershed support the Copermittees decision to focus efforts elsewhere in the watershed to maximize positive impacts of activities.

5.3 Conclusions for the Lower San Luis HA The high priority water quality problems in the Lower San Luis HA identified in the SLR WURMP 2008 are bacteria and nutrients. Water quality data collected in FY 2007-08 and FY 2008-09 provided new information specific to the HA. A TWAS was installed towards the bottom of the Bonsall HSA in FY 2007-08 and gathered data in addition to the historical MLS. Data was collected during ambient (dry) and storm (wet) conditions at the TWAS and MLS. Due to the rotational nature of the TWAS between northern and southern watersheds no new data was acquired from the TWAS during this reporting period. The data collected to date continues to support listing bacteria and nutrients as high priority water quality problems in the Lower San Luis Rey HA.

5.3.1 Water Quality Activities During FY 2009-10, six water quality activities in the HA were in the implementation phase. These activities appear well designed to address high priority water quality problems in the watershed. Continued monitoring programs throughout the watershed will continue to complement Copermittee data collected as part of the Regional and Jurisdictional Monitoring Programs. These additional programs will likely lead to the implementation of appropriate water quality and education activities targeting identified sources of bacteria and nutrients in the watershed.

During FY 2010-11, eight total water quality activities are planned to be implemented, with three designed to address water quality problems related to bacteria, two designed to address nutrients, and three that address both bacteria and nutrients.

Bacteria The SLR Copermittees have implemented several activities designed to address identified sources of bacteria in the watershed. During FY 2009-10, four water quality activities focused on the abatement of specific sources of bacteria. There are also several monitoring and source identification activities related to bacteria in the planning or implementation phase.

5-1 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report Nutrients During FY 2009-10, two water quality activities focused on the abatement of specific sources of nutrients. In addition there were two monitoring and source identification activities specifically focused on the sources of nutrients. These were chosen because the sources of the nutrients remain largely uncharacterized in the watershed. Each of these activities appears to be well designed to assess sources of nutrients causing or contributing to water quality problems in the watershed.

5.3.2 Water Quality Education Activities During FY 2009-10, six water quality education activities were implemented, one focused on bacteria, one focused on Nutrients, and four focused on both bacteria and nutrients. During this reporting period targeted outreach related to pet waste educating residents on the impacts of pet waste and improper disposal proved successful and activity implementation is recommended to continue in FY 2010-11. Newsletters distributed through utility bills to over 40,000 Oceanside households provided information about picking up and properly disposing pet waste along the SLR Recreational Trail.

In FY 2010-11, six education activities are planned with one designed to address water quality problems related to bacteria, two designed to address nutrients, and four that address both bacteria and nutrients. See table 3-7 and associated activity sheets in Appendix A for more information about implementation tasks related to these activities.

5.4 Recommendations Current water quality activities appear to address identified high priority water quality problems. However, sources need to be linked to the high priority pollutants in order to more completely assess the effectiveness of these activities. This may be accomplished via research, current data assessments, and supplemental monitoring specific to these activities. The current monitoring programs under implementation in the watershed are a positive step in establishing this linkage.

Some of the hydrologic areas in the SLR HU have no receiving water data. Collection of receiving water data where limited sets exist may assist WURMP Copermittees in developing water quality assessments and prioritizing HAs.

Water quality activities that have proven effective may be expanded to other HAs when funding is available. Education activities are often broad in nature and reach targeted groups throughout the watershed; however, where this is not occurring, other Copermittees may wish to build on the experience gained in some of the specific education activities.

5-2 San Luis Rey River Watershed Urban Runoff Management Program FY 2009-10 Annual Report Activities in the watershed appear to be properly focused on identified water quality problems in the SLR HU. These types of activities should continue as bacteria and nutrients show increasing trends at receiving water monitoring stations. Future monitoring should continue to focus on source identification activities in the watershed, especially related to suspected bacteria and nutrient pollution. Future TWAS data will be examined carefully to discern between water quality in the upper and lower watershed. At this time, it appears that the focusing of activities in the lower watershed is appropriate.

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6 References Oceanside (City of Oceanside). 2008. Jurisdictional Urban Runoff Management Program 2007-08 Annual Report. September 30, 2008. Updated December 15, 2008.

SANDAG (San Diego Association of Governments). 1998. SANDAG INFO, Watershed of the San Diego Region. March-April 1998.

SDCRC (San Diego County Regional Copermittees). 2010. Methodology for Annual and Long-Term Data Assessments for San Diego County Watershed Management Areas , Final Draft-Version 1 (November 2010).

SLR WURMP (Watershed Urban Runoff Management Program). 2008. San Luis Rey River Watershed Urban Runoff Management Program. Prepared by the Cities of Oceanside and Vista and the County of San Diego. March 2008.

WESTON (Weston Solutions, Inc.), Larry Walker Associates (LWA), and Mikhail Ogawa Engineering (MOE). 2005. Baseline Long-Term Effectiveness Assessment . Prepared for the San Diego County Copermittees. August 2005.

Weston (Weston Solutions, Inc.). 2010. San Diego County Municipal Copermittees 2008–2009 Urban Runoff Monitoring. Prepared for the County of San Diego. January 2010.

Weston (Weston Solutions, Inc.). 2011. San Diego County Municipal Copermittees 2009–2010 Urban Runoff Monitoring. Prepared for the County of San Diego. January 2011.

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Appendix A

SAN LUIS REY

Watershed Activity Implementation Summary Sheets with Associated Attachments and Proposed Watershed Activity Summary Sheets

Annual Report for Fiscal Year 2009-10

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WATERSHED ACTIVITY IMPLEMENTATION SUMMARY SHEET Water Quality Monitoring Activity

TITLE: San Luis Rey Watershed Water Quality Monitoring Program ID NUMBER: SLR-001

ACTIVITY DESCRIPTION A primary component of the San Luis Rey WURMP is to identify and characterize the constituents of concern adversely affecting water quality in the San Luis Rey River Watershed. Therefore, the County of San Diego and the City of Oceanside began a coordinated sampling program in 2004 consisting of both field observations and field and analytical water quality sampling. This activity was developed collaboratively by the Watershed Copermittees within the San Luis Rey Watershed.

The activity includes the following tasks to be performed by the Watershed Copermittees: • Update the monitoring plan as needed. • Implement monitoring plan with field and laboratory analyses of constituents. • Collect, compile, and analyze data. • Prepare an annual written report including conclusions and recommendations.

A full description of the monitoring program, including sampling locations, procedures, and analyses is provided in the following attachments to this Activity Implementation Sheet: • Attachment A: General Program Description • Attachment B: Bacteria Sampling Description and Analyses • Attachment C: TDS and Chloride Sampling Description and Analyses • Attachment D: Nutrient Sampling Description and Analyses • Attachment E: Monitoring Results for FY 2009-10

ACTIVITY IMPLEMENTATION FY 2007-08 A description of the FY 2007-08 monitoring program, including sampling locations, procedures, and analyses is included in the FY 2007-08 WURMP Annual Report

ACTIVITY IMPLEMENTATION FY 2008-09 A description of the FY 2008-09 monitoring program, including sampling locations, procedures, and analyses is included in the FY 2008-09 WURMP Annual Report

ACTIVITY IMPLEMENTATION FY 2009-10 A description of the FY 2009-10 monitoring program, including sampling locations, procedures, and analyses is included as Attachments A–D to this Activity Implementation Sheet.

In addition, the County of San Diego and the City of Oceanside initiated a review of existing efforts to explore how the voluntary sampling program may be refined to increase program efficiencies and provide useful data in light of upcoming regulatory drivers. Future regulatory drivers which may impact the current sampling efforts may include the agricultural waiver monitoring program, the Draft Total Maximum Daily Load (TMDL) for Indicator Bacteria in the

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San Luis Rey watershed, and the recent addition of pollutants to the US EPA Clean Water Act Section 303(d) list. In order to assist with assessment efforts the County of San Diego convened a Technical Advisory Committee (TAC) composed of watershed stakeholders and water quality experts. The TAC met twice during the FY 2009-10 and efforts will continue during FY 2010- 11. TAC recommendations will likely result in changes to the joint monitoring program in FY 2010-11.

TMDL APPLICABILITY This activity is planned for future implementation of the TMDL for Indicator Bacteria, Project 1 – Beaches and Creeks in the San Diego Region.

TIME SCHEDULE FOR IMPLEMENTATION Monitoring activities will be revised in response to recommendations from the San Luis Rey Voluntary Monitoring TAC when released in FY 2010-11.

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside • County of San Diego

OTHER PARTICIPATING ENTITIES • San Luis Rey Joint Water Quality Monitoring TAC

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The collective watershed strategy identifies nutrients and bacteria as high priority water quality problems in the Mission HSA (903.11). This monitoring program is therefore consistent with the strategy.

EFFECTIVENESS ASSESSMENT The County of San Diego and the City of Oceanside collected periodic samples from San Luis Rey River and its tributaries beginning March 2004, sampling bacteria, TDS, Chloride, Magnesium, Iron, Manganese, Total Phosphorus, Nitrates, and pH samples from San Luis Rey River and its tributaries. • Bacterial indicators, total dissolved solids (TDS) and chloride data were compiled and analyzed (Level 1 Outcome). • Written reports including conclusions and recommendations were prepared (Level 1 Outcome).

An overview of the joint monitoring program is provided in Attachment A; detailed analysis of bacteria results is provided in Attachment B; detailed analysis of TDS and chloride results is provided in Attachment C; detailed analysis of nutrient results is provided in Attachment D.

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ATTACHMENT A TO SLR-001

SAN LUIS REY WATERSHED WATER QUALITY MONITORING PROGRAM ACTIVITY 2009-10 SLR WURMP Annual Report

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1.0 PROGRAM DESCRIPTION

The San Diego Regional Water Quality Control Board reissued the Municipal National Pollutant Discharge Elimination System (NPDES) permit, Order 2007-0001, to all 21 San Diego County Copermittees. Order 2007-0001 continues to require Copermittees to implement Watershed Urban Runoff Management Plans (WURMP) for all watersheds in San Diego County. A primary component of the San Luis Rey WURMP (SLR WURMP) is to identify the constituents of concern adversely affecting the water quality of the River. Therefore, the County of San Diego and the City of Oceanside began a coordinated sampling program of the lower 19 miles of the San Luis Rey River, on March 10, 2004, consisting of both field observations and field and analytical sampling.

From March 2004 through June 2010, 20 locations were sampled: nine by the City of Oceanside and 12 by the County of San Diego. Seven sampling sites were located along the San Luis Rey River and 11 in the mouths of River’s tributaries. One location, Pacific Mix Zone, was in the Pacific Ocean 75 ft south of San Luis Rey River outlet. This location was sampled for bacteria only. One site along the River’s main stem, Bonsall Bridge (SLR16), was sampled by both agencies for quality control. All sampling locations are described in more detail in the table below.

In addition, in 2007, the City of Oceanside was awarded a State Proposition 50, Clean Beaches Initiative grant to conduct a bacteria source tracking study in the Lower San Luis Rey River. As part of the grant, the City and County agreed to continue the joint monitoring program and updated the bacteria sampling protocols to be compliant with the Surface Water Ambient Monitoring Program (SWAMP) during the duration of the project which began in June of 2008 and was scheduled to end in 2010. The grant was halted during calendar year 2009 due to State budget cuts, but was restarted in the beginning of 2010. Joint monthly monitoring continued through 2009 and is planned to continue through April 2010, the expected end date for monitoring under the grant-funded study.

2.0 PROGRAM DESIGN

The County and the City coordinate monitoring to collect samples on the same day when possible. No sampling is conducted if rainfall over 0.1 inches has occurred within 72 hours prior to the sampling date. Rescheduling with the County must occur if the regularly scheduled sampling date has been interrupted.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment A FY 2009-10 Activity Implementation Summary Sheet SLR-001

Sample Locations

The following table shows a list of the City and County monitoring sites:

Latitude Longitude (NAD 83 (NAD 83 Jurisdiction Site Name Site Description decimal decimal degrees) degrees) Pacific Ocean 75 ft south of Oceanside Pacific Mix 33.20156 -117.39178 San Luis Rey River outlet. San Luis Rey River Oceanside Pacific southeast of Parking Lot 33.20303 -117.39117 #10 San Luis Rey River on the west side of Benet Bridge, Benet 33.22037 -117.35836 north of Hwy 76 and Airport Rd. Benet Oceanside (Site moved At USGS Station west of downstream in Benet Bridge approximately 33.21790 -117.35958 June 2008 for 850ft downstream of bridge improved flow monitoring) San Luis Rey River on the Oceanside Douglas east side of Douglas Dr, 33.24051 -117.32238 north of Hwy 76/Douglas Dr. North side of SLR River at Pilgrim Creek end of Flood Control Oceanside 33.24103 -117.3359 Outlet Embankment, entered from Whelan Ranch Road San Luis Rey River on the north side of Murray Bridge Oceanside Murray 33.2505 -117.29866 at intersection of College Blvd. and Vandergrift Blvd. Guajome Lake South side of SLR River, Outlet where Guajome Lake effluent flows into river. Oceanside 33.25342 -117.28889 (Sampling of this 5030 Tyler Road. site ended in FY Easement Key #A227. 06/07) Drive North, then walk. Sleeping Indian North side of San Luis Rey

River; South of intersection Oceanside (Sampling of this 33.25998 -117.26422 of Sleeping Indian Rd and site began in FY North River Rd. 06/07) Oceanside Bonsall San Luis Rey River under 33.26042 -117.23833 County (SLR 16) the Bonsall Bridge San Luis Rey River at Olive County SLR25 33.28838 -117.22335 Hill Road San Luis Rey River at County SLR28 33.33281 -117.14975 Pankey Rd

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment A FY 2009-10 Activity Implementation Summary Sheet SLR-001

Latitude Longitude (NAD 83 (NAD 83 Jurisdiction Site Name Site Description decimal decimal degrees) degrees) Moosa Canyon Creek at Old County SLR01 33.2836 -117.218683 River Road Little Gopher Canyon Creek County SLR02 33.265683 -117.2332 at Old River Road Bonsall Creek at Highway County SLR26 33.28959 -117.22525 76 Ostrich Farm Creek at County SLR14 33.29335 -117.22396 Highway 76 Live Oak Creek at Highway County SLR27 33.31514 -117.19418 76 County SLR17 Keys Creek at Dulin Rd 33.32363 -117.15744 Tributary to the San Luis SLR 34 Rey River East of East Vista County (Sampling begun in 33.25872 -117.23931 Way and Mission Rd. June 2008) Intersection SLR 32 County (Sampling begun in Horse Ranch Creek 33.33138 -117.15067 June 2008) SLR31 County (Sampling begun in Moulder Ranch Creek 33.30205 -117.21691 June 2008)

Field Screening, Sample Collection and Analysis

For each site visit, the sampler should use the San Luis Rey River Monitoring form. Samples should not be collected until 72 hours after a rainstorm.

Observations

Qualitative field observations are made during each site visit. These observations are intended to provide a general assessment of the site and include the following runoff characteristics: odor, clarity, color, floatables, deposits, vegetation and biology.

Flow

Instantaneous flow measurements are used to estimate pollutant mass loading and identify significant changes in discharge that may be indicative of an illegal release upstream.

Field Analysis

The City of Oceanside and the County of San Diego conduct the following in-situ water quality measurements:

• Water temperature • pH • Conductivity

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment A FY 2009-10 Activity Implementation Summary Sheet SLR-001

• Turbidity • Dissolved Oxygen • Flow

Prior to 2005, field test kits were employed to measure sample concentrations of Nitrate as N 1, Orthophosphate as P and Ammonia as N by both the County of San Diego and the City of Oceanside. Prior to October 2009, the City used field test kits exclusively while the County supplemented field test kit results with analytical laboratory testing. After October 2008, the County discontinued all field test kit testing in favor of laboratory analysis. The City initiated laboratory analysis for nutrients in October 2009.

Laboratory Analysis for City of Oceanside

The analytical laboratory analyses conducted by the City include the following constituents 2 • Ammonia as N (quarterly) • Nitrate as N (quarterly) • Nitrite as N (quarterly) • Total Kjeldahl Nitrogen (quarterly) • Orthophosphate as P (quarterly) • Total Phosphorus (quarterly) • Total and Fecal Coliforms • Enterococcus • Chloride (quarterly) • Sulfate (quarterly) • Total Suspended Solids (quarterly) • Total Dissolved Solids (quarterly) • Total Hardness (quarterly) • Bicarbonate Alkalinity (quarterly) • Carbonate Alkalinity (quarterly) • Total Alkalinity as CaCO3 (quarterly) • Dissolved Magnesium (quarterly) • Dissolved Iron (quarterly) • Dissolved Manganese (quarterly) • Dissolved Calcium (quarterly) (quarterly) • Dissolved Sodium (quarterly) • Dissolved Potassium (quarterly) •

Note: At Pacific and Pacific Mix monitoring locations, only indicator bacteria samples are collected and analyzed due to the saltwater/freshwater influence. At Pacific, general chemistry is also recorded from the in-situ measurements.

Lab Analysis for County of San Diego

The analytical laboratory analyses conducted by the County include the following constituents 2:

1 Field testing for nitrate is occasionally unattainable using current testing equipment, due to high conductivity levels 2 Collected samples are submitted to a California Department of Health Services certified laboratory

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment A FY 2009-10 Activity Implementation Summary Sheet SLR-001

• Ammonia as N • Nitrate as N • Nitrite as N • Total Kjeldahl Nitrogen • Organic Nitrogen • Orthophosphate as P • Total Phosphorus • Total and Fecal Coliforms • Enterococcus • Chloride (quarterly) • Sulfate (quarterly) • Total Suspended Solids (quarterly) • Total Dissolved Solids (quarterly) • Total Hardness (quarterly) • Bicarbonate Alkalinity (quarterly) • Carbonate Alkalinity (quarterly) • Hydroxide Alkalinity (quarterly) • Total Alkalinity (quarterly) • Dissolved Magnesium (quarterly) • Iron (quarterly) • Dissolved Manganese (quarterly) • Dissolved Calcium (quarterly) • Dissolved Sodium (quarterly) • Dissolved Potassium (quarterly)Boron (quarterly) • Fluoride (quarterly)

Bacteria Monitoring Protocols

As detailed in the Lower San Luis Rey River Source Identification Project Quality Assurance Project Plan (QAPP), sample collection for indicator bacteria consists of composite bacterial grab samples and lower detection limits. These samples were collected with equivalent volumes taken from three points perpendicular to stream flow at approximately 10, 50, and 90% stream width away from the stream bank. Detection limits for total and fecal coliform were 2 MPN/100ml and for Enterococcus was 1 MPN/100ml.

Quality Assurance/Quality Control (QA/QC)

During each sampling event one site is selected (at random or rotating) to conduct duplicate analyses of all laboratory measured parameters.

Laboratory Parameters

1 container – grab sample is collected for bacteria analysis 1 container – grab sample, for TDS and Chloride 1 container – grab sample, for Fe, Mn, and Mg. 1 container – grab sample, for nutrients

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ATTACHMENT B TO SLR-001

SAN LUIS REY WATERSHED WATER QUALITY MONITORING PROGRAM ACTIVITY 2009-10 SLR WURMP Annual Report

Joint Bacteria Monitoring Program

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Introduction The Pacific Ocean Shoreline at the San Luis Rey River mouth was included on the 2006 California Clean Water Act Section 303(d) List of Water Quality Limited Segments (303(d) List) for indicator bacteria. The 2008 303(d) List, which was partially approved by the USEPA on November 18, 2010, adds the Lower San Luis Rey River (west of Interstate 15) as impaired for fecal coliform and Enterococcus, and changes the listing for the Pacific Ocean shoreline from indicator bacteria to total coliform and Enterococcus. In addition, a Total Maximum Daily Load (TMDL) for indicator bacteria was adopted by the San Diego Regional Water Quality Control Board for the San Luis Rey River on February 10, 2010, as part of the Beaches & Creeks TMDL. Once formally adopted by the State Water Resources Control Board, the TMDL will establish limits for indicator bacteria at the Pacific Shoreline.

The City of Oceanside (City) and the County of San Diego (County) began a joint bacteria monitoring program in the San Luis Rey River in March 2004. The goal of this project is to better characterize levels of bacterial indicators in the watershed segment from Interstate 15 to the Pacific Ocean. In 2007, the City was awarded a Proposition 50 Clean Beaches Initiative grant to conduct a bacteria source tracking study in the Lower San Luis Rey River. As part of the grant, the City and County agreed to continue their joint bacteria monitoring program. They also updated the bacteria sampling protocols to match Surface Water Ambient Monitoring Program (SWAMP) guidelines over the duration of the project: starting in June 2008 and scheduled to end in 2010. New monitoring protocols that included composite sampling and lower detection limits for indicator bacteria analysis were also implemented in June 2008. Although funding for the City’s bacteria source tracking study was halted in December 2008, routine bacteria monitoring continued monthly through June 2010.

Hydrologic Setting The San Luis Rey River originates mainly in the Palomar and Hot Springs Mountains. In 1922, Henshaw Dam was built and Lake Henshaw was formed at the base of Palomar Mountain. No imported water is released directly into the lake and TDS and chloride concentrations in the lake fall below Basin Plan standards. The Vista Irrigation District (VID) owns Lake Henshaw and uses the Lake as a drinking water reservoir. Seven miles downstream of the Lake Henshaw dam, water from the main channel of the River is diverted into the man-made Escondido Canal. Nearly all non-storm flows are diverted from that section of the SLR River into the canal, which discharges to Lake Wohlford in the Carlsbad Watershed. The flow in the remainder of SLR River is intermittent through Pauma and Pala. The River is perennial through Oceanside, although it flows underground in several sections during dry weather.

Precipitation in the coastal portion of the watershed is about 11 inches/yr, 17 inches/yr in the coastal plains and valleys, and about 45 inches/yr at Palomar Mountain. On an annual basis, there are two distinct climatic periods in the area – a dry (semi-arid) period from late April to mid-October, and a wet period from mid-October to late April. The wet period typically provides 85 to 90 percent of the annual average rainfall in the coastal areas. The River is generally dry in the summer months except for locations where groundwater seeps and springs emanate in the river bed and form perennial riparian habitats. There are three groundwater basins within the lower San Luis Rey Watershed: Bonsall, Mission and Moosa Canyon. The basins provide baseflow surface water to sections of the River that would otherwise be dry during the dry season.

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Methods From March 2004 through June 2010, 18 locations (Figure 1) were sampled: seven by the City of Oceanside and 12 by the County of San Diego (Table 1). Both agencies collected samples on the same days or within one or two days of one another. Seven sampling sites were located along the San Luis Rey River and 11 in the mouths of the River’s tributaries. One site along the River’s mainstem, Bonsall Bridge (SLR16), was sampled by both agencies for quality control.

During FY 2009/2010, monthly sample collection was attempted from all locations. Prior to FY 2008/2009, main stem samples were collected monthly from Bonsall Bridge to the ocean and less frequently at sampling points east of Bonsall Bridge. The tributaries were sampled monthly from March through December 2004 and less frequently thereafter. Since July 2006, sampling at the Guajome Lake Outlet, which was frequently dry, was abandoned and replaced by sampling at the Sleeping Indian Outlet. Also, beginning in July 2006, additional bacterial samples were collected at the Pacific shoreline (named “Pacific Mix Zone” in Tables 3 through 5) in order to compare bacterial concentrations at the mouth of SLR to those at the shoreline nearby (75 ft south of the River mouth).

All samples were collected during dry weather, which was defined as at least 72 hours following any rain event with precipitation greater than or equal to 0.10 inches. During FY 2009/2010, the April 2010 sampling event was postponed several times due to rain and then cancelled. Sampling was continued in May. Prior to June 2008, single grab samples were collected from the center of the stream. Thereafter, as detailed in the Lower San Luis Rey River Source Identification Project Quality Assurance Project Plan (QAPP), composite samples were collected with equivalent volumes taken from three points perpendicular to stream flow at approximately 10, 50, and 90% stream width away from the stream bank. Samples were placed in sterilized collection bottles supplied with sodium thiosulfate as a preservative. Samples were stored at 4ºC and transported to the laboratory to be analyzed with multi-tube fermentation method to estimate bacterial counts for total and fecal coliforms and Enterolert methodology for Enterococcus.

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THIS MAP/DATA IS PROVIDED WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE. Note: This product may contain information from the SANDAG Regional Information System which cannot be reproduced without the written permission of SANDAG. This product may contain information reproduced with permission granted by RAND MCNALLY & COMPANY® to SanGIS. This map is copyrighted by RAND MCNALLY & COMPANY®. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without the prior, written permission of RAND MCNALLY & COMPANY®.Copyright SanGIS 2009 - All Rights Reserved. Full text of this legal notice can be found at: http://www.s angis.org/Legal_Notice.htm

Figure 1: Sampling locations.

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Table 1: Sample Site Identification and Locations City of Oceanside Sampling Locations Site ID Site Description Latitude Longitude Pacific Mix Pacific Ocean 75 ft south of San Luis Rey River outlet. 33.20156 -117.39178 Pacific San Luis Rey River southeast of Parking Lot #10 33.20303 -117.39117 Benet At USGS Station west of Benet Bridge approximately 33.21790 -117.35958 850ft downstream of bridge San Luis Rey River on the east side of Douglas Dr, Douglas 33.24051 -117.32238 north of Hwy 76/Douglas Dr. Pilgrim Creek North side of SLR River at end of Flood Control 33.24103 -117.3359 Outlet Embankment, entered from Whelan Ranch Road San Luis Rey River on the north side of Murray Bridge Murray 33.2505 -117.29866 at intersection of College Blvd. and Vandergrift Blvd. Sleeping Indian North side of San Luis Rey River; South of intersection 33.25998 -117.26422 of Sleeping Indian Rd and North River Rd.

Bonsall San Luis Rey River under the Bonsall Bridge 33.26042 -117.23833

County of San Diego Sampling Locations Site ID Site Description Latitude Longitude Bonsall (SLR16) SLR River under the Bonsall Bridge 33.26042 -117.23833 Olive Hill (SLR25) SLR River at Olive Hill Road 33.28838 -117.22335 Shearer Crossing SLR River at Pankey Road 33.33281 -117.14975 (SLR28) Moosa Canyon Creek Moosa Canyon Creek tributary at Old River Road 33.283600 -117.218683 (SLR01) Little Gopher Canyon Little Gopher Canyon Creek tributary at Old 33.265683 -117.233200 Creek (SLR02) River Road Bonsall Creek Bonsall Creek tributary at Highway 76 33.28959 -117.22525 (SLR26) Ostrich Farm Creek Ostrich Farm Creek tributary at Highway 67 33.29335 -117.22396 (SLR14) Live Oak Creek Live Oak Creek tributary at Highway 67 33.31514 -117.19418 (SLR27) Keys Creek (SLR17) Keys Creek tributary at Dunlin Road 33.32363 -117.15744 Moulder Ranch Creek Moulder Ranch Creek tributary 33.30205 -117.21691 (SLR31) Horse Ranch Creek Horse Ranch Creek tributary 33.33138 -117.15067 (SLR 32) East Vista Way Tributary to SLR River East of East Vista Way 33.25872 -117.23931 (SLR 34) and Mission Rd. Intersection

Rain Event Summary Rain occurred in trace amounts in June and October 2004, in larger quantities January through March 2005, and again in April 2005 and 2006 (Table 2). Significant rainfall also took place three and four days prior to the December 4, 2007, sampling event. Some rain also occurred prior to the February 7, 2008, sampling. Significant rainfall also occurred in late November 2008 and in mid-February 2009. In 2010, several rain events occurred from December through April SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 4 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

2010. The April 2010 sampling was postponed and eventually cancelled due to several rain events. Sixty-one (61) out of 74 samples collected at Pacific St. Crossing appeared to have been influenced by seawater as evidenced by the high concentration of chloride and high conductivity (Attachment E).

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 5 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Table 2: Rain Event Summary. Date Fallbrook Airport Oceanside Airport Oceanside Harbor 3/10/2004 None None None 4/14/2004 None None None 5/12/2004 None None None 6/9/2004 None Trace on 6/8 and 6/7 None 7/14/2004 None None None 8/17/2004 None None None 9/13/2004 None None None 10/13/2004 None Trace on 10/12 None 11/17/2004 None None None 12/15/2004 None None None 1/26/2005 0.25” on 1/26 Trace on 1/26 None 2/9/2005 0.48” on 2/7 0.04” on 2/7 None 3/9/2005 0.01” on 3/9 None Trace on 3/8 4/6/2005 None Trace on 4/4 None 5/3/2005 None None None 6/8/2005 None None None 7/12/05 None None None 7/13/05 None None None 8/9/05 None None None 8/10/05 None None None 9/6/05 None None None 10/4/05 None None None 11/1/05 None None None 12/7/05 None None None 1/10/06 None None None 2/7/06 None None None 0.02” on 3/31, 0.05” on 4/1 & 4/3/06 0.07” on 4/1 0.06” on 4/2 0.02” on 4/3 5/17/06 None None None 5/30/06 None None None 6/20/06 None None None 7/11/06 None None None 8/1/06 None None Trace on 8/1, 7/31 & 7/30 9/12/06 None None None 10/3/6 None None Trace on 10/2 11/7/06 None None None 12/5/06 None None None 1/9/07 None None None 2/7/07 None None None 3/6/07 None None None 4/3/07 None None None 5/1/07 None Trace on 5/1 None 6/5/07 None None None 7/10/07 None None None 8/7/07 None None None 9/4/07 None None None 10/2/07 None None None 11/6/07 None None None 1.84” on 11/30 & 12/4/07 Missing Data 0.94” on 12/1/07 1.14” on 12/1/07 1/14/08 None None None 2/7/08 2/3-4 Data Missing 0.4” on 2/3 & 0.06” on 2/4 2/3-4 Data Missing 3/4/08 None None None 4/8/08 Missing Data None None

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Table 2: Rain Event Summary. Date Fallbrook Airport Oceanside Airport Oceanside Harbor 5/13/08 None None None 6/17/08 Missing Data None None 7/8/08 None None None 8/12/08 None None None 8/13/08 None None None 9/9/08 None None None 9/10/08 None None None 10/13/08 None None None 11/17/08 None None None 11/18/08 None None None 0.75” on 11/26 & 0.80” on Trace on 12/8 & 0.82” on11/26 0.87” on 11/26 & 11/27 Data 12/9/08 11/27 & 0.72” on 11/27 Missing 0.75” on 11/26 & 0.80” on Trace on 12/8 & 0.82” on11/26 0.87” on 11/26 & 11/27 Data 12/10/08 11/27 & 0.72” on 11/27 Missing 1/13/09 0.07” on 1/3 0.25” on 1/3 1/3 Data Missing 1/17/09 None None None 0.49” on 2/16 & 0.19 on 2/17 Trace on 2/23 & 0.20” on 2/16 0.30” on 2/16 & 0.21 on 2/17 2/23/09 & 0.28 on 2/17 0.49” on 2/16 & 0.19 on 2/17 Trace on 2/23 & 0.20” on 2/16 0.30” on 2/16 & 0.21 on 2/17 2/24/09 & 0.28 on 2/17 3/10/09 0.01” on 3/5 Trace on 3/5 None 3/11/09 0.01” on 3/5 Trace on 3/5 None 4/14/09 None None None 4/15/09 None None None 5/12/09 None None None 5/13/09 None None None 6/9/09 None None None 6/11/09 None Trace on 6/7 None 7/14/09 None None None 7/15/09 None None None 8/10/09 None None None 9/22/09 None None None 9/28/09 None None None 10/27/09 None None None 11/17/09 None None None 0.41” on 12/12 & 0.98” on 2/13 Total of 1.08” from 12/11 to More than 1.66” from 12/7 12/17/09 12/14 to 12/13 More than 5.69” from 1/18 to Trace on 1/26 & total of 4.24” More than 2.49” from 1/18 1/26/10 1/23 from 1/18 to 1/23 to 1/23 Total of 1.63” from 2/6 to 2/7 Total of 1.19” from 2/5 to Missing Data 2/17/10 2/10 Total of 1.63” from 2/6 to 2/7 Total of 1.19” from 2/5 to Missing Data 2/18/10 2/10 More than 0.61” from 3/4 to Total of 0.41” from 3/4 to Missing Data 3/15/10 3/8 3/10 More than 0.61” from 3/4 to Total of 0.41” from 3/4 to Missing Data 3/17/10 3/8 3/10 5/18/10 Trace on 5/17 Trace on 5/18 Trace on 5/18 5/19/10 Trace on 5/17 Trace on 5/18 Trace on 5/18 6/8/10 None None None 6/9/10 None None None *Data for this table were obtained from the National Weather Service Forecast Office for San Diego CA (http://www.wrh.noaa.gov/sgx/obs/rtp/rtpmap.php?wfo=sgx)

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 7 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Analysis of Data All data beginning in March 2004 through the end of June 2010 are listed in Tables 3 through 8 below. The data are sorted by the bacterial indicator type (total coliform, fecal coliform and Enterococcus) and sampling location (either along the River’s main stem or in the tributaries). In each table, the total number and percentage of samples exceeding the corresponding State AB411 single sample standards were calculated for each sampling date and location. Results are also presented for all dates and locations combined. The log mean bacterial counts and 95% confidence intervals were then calculated for each bacterial indicator type by sampling location and the results were represented graphically in Figures 2 through 7.

In order to determine whether bacterial concentrations at the mouth of the SLR River may have had an effect on those at the Pacific Ocean shoreline nearby, a correlation analysis was conducted on bacterial counts from the River mouth (Pacific) and the location 75 feet south of the river mouth along the shoreline (Pacific Mix). In order to normalize the data, the counts were log-transformed. Correlation coefficients ( r) and significance ( p values) were calculated for each set of the 45 sample pairs analyzed. *

Results Attachment E, at the end of this attachment, provides a full record of all data collected during FY 2009/ 2010.

Total Coliform Bacteria in the Main Stem

The total coliform bacteria counts exceeded the State single sample standard of 10,000 MPN/100ml in 65 out of 435 (15%) samples analyzed (Table 3). Douglas had the highest exceedance rate (26%) and the highest mean concentration (Figure 2). During FY 2009/ 2010, exceedances were recorded occasionally with the greatest percentage (38%) occurring in January 2010. For FY 2009/ 2010, the highest exceedance of 28,000 MPN/100 ml occurred at Douglas.

The overall mean concentrations of total coliform along the San Luis Rey River tended to remain below the single sample standard at all sampled locations (Figure 2). The mean total coliform concentration at Pacific was lower than that of the sites further upstream but this difference was not statistically significant for Olive Hill Rd (SLR25) and Shearer Crossing (SLR28) - most probably due to the small number of samples collected at those two sites. The mean total coliform concentration in the Pacific Mix Zone was significantly lower than that at any of the River and tributary locations.

* The correlation coefficient ( r) gives a measure of the nature and magnitude of each correlation. Positive r values indicate that counts at the two sites increase or decrease together; negative values of r indicate that while counts at one location increase, they decrease at the other; the higher the value of r, the stronger the correlation with a higher percentage of variability in bacterial counts being explained by the sampling location. P-values lower than 0.05 indicate statistically significant correlations.

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Table 3: Total Coliform Densities (MPN/100ml) in the Main Stem of San Luis Rey River. Date Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 3/10/04 NS 1,700 1,700 3,000 6,500 NS 1,400 23 500 7 0 0% 4/14/04 NS 5,000 13,000 5,800 2,200 NS 1,400 NS NS 5 1 20% 5/12/04 NS 1,100 22,000 24,000 13,000 NS 3,500 NS NS 5 3 60% 6/9/04 NS 130 11,000 22,000 13,000 NS 16,000 13,000 dry 6 5 83% 7/14/04 NS 900 1,600 1,600 dry NS 1,600 NS NS 4 0 0% 8/17/04 NS 6,500 2,300 dry dry NS 7,000 NS NS 3 0 0% 9/13/04 NS 800 11,000 dry dry NS 13,000 9,000 dry 4 2 50% 10/13/04 NS 3,000 1,700 3,000 dry NS 2,400 47,750 dry 5 1 20% 11/17/04 NS 1,000 1,300 1,300 3,000 NS NS 5,000 30,000 6 1 17% 12/15/04 NS 20 800 9,000 3,000 NS 300 305 700 7 0 0% 1/26/05 NS 5,000 7,000 2,000 230 NS 11,000 NS NS 5 1 20% 2/9/05 NS 800 2,300 2,400 1,700 NS 260 NS NS 5 0 0% 3/9/05 NS 1,700 2,200 5,000 5,000 NS 3,000 NS NS 5 0 0% 4/6/05 NS 75 8,000 800 3,000 NS 3,000 NS NS 5 0 0% 5/3/05 NS 17,000 9,500 13,000 11,000 NS 2,800 11,000 NS 6 4 67% 6/8/05 NS 5,000 8,000 5,000 1,300 NS 2,200 NS NS 5 0 0% 7/12- 7/13/05 NS 2,200 4,700 230 1,400 NS 800 NS NS 5 0 0% 8/9- 8/10/05 NS 750 8,000 50,000 11,000 NS 3,000 NS NS 5 1 20% 9/6/05 NS 10 3,000 5,000 2,400 NS 3,000 NS NS 5 0 0% 10/4/05 NS 10 5,000 3,000 5,000 NS 3,000 NS NS 5 0 0% 11/1/05 NS 500 2,200 12,000 3,000 NS 1,300 NS NS 5 1 20% 12/7/05 NS 520 300 13,000 500 NS 1,700 NS 1,700 6 1 17% 1/10/06 NS 4,900 800 5,000 7,000 NS 1,700 NS NS 5 0 0% 2/7/06 NS 800 700 5,200 1,700 NS 300 NS NS 5 0 0% 4/3/06 NS 500 1,700 4,300 2,600 NS 700 5,000 NS 6 0 0% 5/17/06 NS NS NS NS NS NS 17,000 8,000 13,000 3 2 67% 5/30/06 NS 800 2,200 6,000 NS NS NS NS NS 3 0 0% 6/20/06 NS 300 5,000 2,200 5,200 NS 2,200 NS NS 5 0 0% 7/11/06 20 20 5,000 700 2,200 NS 5,000 NS NS 5 0 0% 8/1/06 320 1,100 1,700 dry 5,000 NS 2,200 NS NS 4 0 0% 9/12/06 20 500 8,000 dry 4,000 1,100 1,100 NS NS 5 0 0% 10/3/06 NS 300 13,000 dry 13,000 NS 8,000 NS NS 4 2 50% 11/7/06 50 60 3,000 dry 5,000 NS 1,300 NS NS 4 0 0% 12/5/06 20 80 750 5,000 2,200 170 170 NS NS 6 0 0% 1/9/07 NS 20 340 1,300 800 NS 220 NS NS 5 0 0% 2/7/07 300 400 300 1,300 1,900 NS 1,700 NS NS 5 0 0% 3/6/07 170 850 300 5,000 1,200 230 230 NS NS 6 0 0% 4/3/07 500 260 260 800 800 NS 210 NS NS 5 0 0% 5/1/07 220 200 1,100 3,900 1,300 NS 1,300 NS NS 5 0 0% 6/5/07 170 2,200 2,300 30,000 8,000 500 500 NS NS 6 1 17% 7/10/07 2 480 13,000 1,100 5,000 800 800 NS dry 6 1 17% 8/7/07 4 110 1,400 4,300 dry 900 900 NS dry 5 0 0% 9/4/07 ND 70 3,000 30,000 dry 800 800 NS dry 5 1 20% 10/2/07 800 300 3,000 13,000 dry 6,000 6,000 NS dry 5 1 20% 11/6/07 1,700 2,600 800 5,000 dry 800 800 NS NS 5 0 0% 300,0 12/4/07 00 97,000 22,000 30,000 240,000 500,000 500,000 NS NS 6 6 100% 1/14/08 1,700 13,000 2,300 2,200 3,000 3,000 3,000 500 NS 7 1 14% 2/7/08 1,700 3,000 13,000 5,000 23,000 800 800 NS NS 6 2 33%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 9 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 3/4/08 2,200 5,000 2,300 2,200 3,000 270 270 NS NS 6 0 0% 4/8/08 500 500 800 2,800 1,300 3,000 3,000 NS NS 6 0 0% 5/13/08 80 130 11,000 7,000 2,300 3,000 3,000 NS NS 6 1 17% 6/17/08 22 500 30,000 70,000 5,000 2,200 2,200 3,000 dry 7 2 29% 7/8/08 2 4 50,000 13,000 5,000 5,000 1,100 24,000 dry 7 3 43% 8/12- 8/13/08 2 50 3,000 350 3,000 5,000 170 340 dry 7 0 0% 9/9- 9/10/08 13 30 5,000 500 dry 1,300 700 1,400 dry 6 0 0% 10/13/08 11 220 3,000 700 dry 2,300 500 130 dry 6 0 0% 11/17- 11/18/08 130 130 3,000 500 dry 280 230 300 dry 6 0 0% 12/9- 12/10/08 500 1,300 800 50,000 11,000 5,000 210 300 dry 7 2 29% 1/13- 1/17/09 300 230 800 23,000 3,000 2,300 170 40 1,700 8 1 13% 2/23- 2/24/09 5,000 1,100 5,000 5,000 1,300 3,000 230 210 130 8 0 0% 3/10- 3/11/09 800 800 3,000 5,000 2,300 1,700 130 230 40 8 0 0% 4/14- /15/09 11 2,200 2,300 5,000 2,300 17,000 130 130 210 8 1 13% 5/12- 5/13/09 170 80 23,000 50,000 23,000 17,000 220 300 500 8 4 50% 6/9- 6/11/09 30 130 1,600 13,000 30,000 13,000 230 230 3500 8 3 38% 7/14- 7/15/09 13 300 14,000 7,000 23,000 3,000 140 300 Dry 7 2 29% 8/10/09 7 2,300 3,000 700 300 1,700 300 220 Dry 7 0 0% 9/22- 9/28/09 23 220 dry 2,300 11,000 1,300 NM NM Dry 4 1 25% 10/27/09 ND 400 dry 8,000 5,000 500 700 500 Dry 6 0 0% 11/17/09 ND 300 dry 170 1,300 300 500 700 Dry 6 0 0% 12/17/09 130 800 2,200 3,000 11,000 2,300 1,700 300 Dry 7 1 14% 1/26/10 1,700 2,300 5,000 13,000 13,000 8,000 16,000 1,100 5,000 8 3 38% 2/17- 2/18/10 350 1,100 2,300 3,000 1,300 800 900 900 900 8 0 0% 3/15- 3/17/10 1,100 900 1,700 2,200 1,700 5,000 9,000 1,100 1,300 8 0 0% 5/18- 5/19/10 80 600 23,000 8,000 8,000 1,700 1,700 1,300 2,800 8 1 13% 6/8-6/9/10 30 5,000 13,000 28,000 5,000 3,000 2,300 2,300 3,500 8 2 25% Total # of 33 74 71 68 62 39 72 33 16 435 Samples # Samples Exceeding 1 3 15 18 13 6 4 4 2 65 AB411 % Exceeding 3% 4% 21% 26% 21% 15% 6% 12% 13% 15% AB411

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 10 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Values in Red represent exceedances of the AB411 Single Sample Standard of 10,000 MPN/100 mL. ND – Not detected; NS – Not Sampled; dry – the site was dry (no samples collected

4.20 4.00 3.80 3.60 3.40 3.20 3.00 2.80 2.60 2.40 2.20 2.00 1.80 Geometric Mean 1.60 AB411 Single Sample Standard

t e c s y ) ) ) i e

Mean Log Total Coliform +/- 95% CI (MPN/ 100ml) (MPN/ CI 95% +/- Coliform Total Log Mean 6 5 8 n if a a C n l r 1 2 2 o r c e g O u l R R R Z a u l B L L L x P o M a i S S S @ D s ( ( ( @ M @ n l . R l g c R @ R o d i L a n L B i if S R L s R s c S L S n l @ l s a S o i R o P B H r L e C S @ iv r R l e r L O a S @ e h R S L S @ R Main Stem Sampling Location (West to East) L S Figure 2: Relative mean concentrations ± 95% confidence intervals of Total Coliform bacteria in San Luis Rey River and in the Pacific Mix Zone.

Fecal Coliform Bacteria in the Main Stem

The fecal coliform bacteria counts exceeded the State single sample standard of 400 MPN/100ml in 97 of 430 (23%) samples analyzed (Table 4). During FY 2009/2010, exceedances occurred occasionally; the greatest percentage (50%) was recorded in October 2009 and January 2010. The highest exceedance of 1,760 MPN/100ml was recorded at Murray on October 27, 2009. The highest exceedance rate (48%) and the highest mean concentration of fecal coliform bacteria (Figure 3) were recorded at Douglas.

With the exception of Douglas, the overall mean concentrations of fecal coliform along the main stem of San Luis Rey River remained below the AB411 single sample standard (Figure 3). The

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 11 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

mean fecal coliform concentration at Douglas was also significantly higher than at any of the remaining sites (Figure 3). The lowest mean fecal coliform concentrations were observed at Pacific Mix Zone and at Shearer Crossing (SLR28).

Table 4: Fecal Coliform Densities (MPN/100ml) in the Main Stem of San Luis Rey River. Date Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 3/10/04 NS 500 130 1,700 60 NS 170 ND 23 7 2 29% 4/14/04 NS 2,300 260 360 300 NS 20 NS NS 5 1 20% 5/12/04 NS 400 40 170 40 NS 20 NS NS 5 1 20% 6/9/04 NS 40 500 800 170 NS 80 130 dry 6 2 33% 7/14/04 NS 300 50 50 dry NS 50 NS NS 4 0 0% 8/17/04 NS 5,000 80 dry dry NS 40 NS NS 3 1 33% 9/13/04 NS 160 170 dry dry NS 20 75 dry 4 0 0% 10/13/04 NS 3,000 20 20 dry NS 20 188 dry 5 1 20% 11/17/04 NS 700 220 1,300 300 NS NS 130 20 6 2 33% 12/15/04 NS 20 500 9,000 110 NS 40 50 40 7 2 29% 1/26/05 NS 300 1,400 360 230 NS 3,000 NS NS 5 2 40% 2/9/05 NS 300 500 500 500 NS ND NS NS 5 3 60% 3/9/05 NS 500 800 1,300 230 NS 140 NS NS 5 3 60% 4/6/05 NS ND 70 230 ND NS 80 NS NS 5 0 0% 5/3/05 NS 300 270 300 130 NS 130 700 NS 6 1 17% 6/8/05 NS 80 170 80 500 NS 140 NS NS 5 1 20% 7/12- 7/13/05 NS 80 95 230 300 NS 130 NS NS 5 0 0% 8/9- 8/10/05 NS 160 500 500 270 NS 300 NS NS 5 2 40% 9/6/05 NS 10 300 500 400 NS 800 NS NS 5 3 60% 10/4/05 NS 10 170 300 1,300 NS 140 NS NS 5 1 20% 11/1/05 NS 130 1,100 9,500 220 NS 230 NS NS 5 2 40% 12/7/05 NS 220 230 13,000 30 NS 40 NS NS 5 1 20% 1/10/06 NS 4,400 500 80 80 NS 90 NS NS 5 2 40% 2/7/06 NS 500 300 5,200 300 NS 110 NS NS 5 2 40% 4/3/06 NS 80 40 1,700 160 NS 8,130 40 NS 6 2 33% 5/17/06 NS NS NS NS NS NS NS 50 NS 1 0 0% 5/30/06 NS 170 80 500 NS NS NS NS NS 3 1 33% 6/20/06 NS 230 800 300 260 NS 500 NS NS 5 2 40% 7/11/06 20 20 1,300 230 130 NS 20 NS NS 5 1 20% 8/1/06 220 700 80 dry 300 NS 80 NS NS 4 1 25% 9/12/06 20 230 800 dry 220 NS 110 NS NS 4 1 25% 10/3/06 NS 20 300 dry 500 NS 80 NS NS 4 1 25% 11/7/06 50 60 500 dry 300 NS 130 NS NS 4 1 25% 12/5/06 20 40 260 3,000 300 130 130 NS NS 6 1 17% 1/9/07 NS 20 140 1,300 80 NS 130 NS NS 5 1 20% 2/7/07 300 400 20 800 110 NS 70 NS NS 5 2 40% 3/6/07 110 700 230 700 300 110 110 NS NS 6 2 33% 4/3/07 500 260 170 300 300 NS 90 NS NS 5 0 0% 5/1/07 70 100 230 530 70 NS 80 NS NS 5 1 20%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 12 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 6/5/07 170 2,200 2,300 2,300 230 20 20 NS NS 6 3 50% 7/10/07 ND 170 500 40 170 170 170 NS dry 6 1 17% 8/7/07 2 110 70 500 dry 40 40 NS dry 5 1 20% 9/4/07 ND 20 220 700 dry 130 130 NS dry 5 1 20% 10/2/07 800 230 2,300 40 dry 80 80 NS dry 5 1 20% 11/6/07 1,700 2,000 110 40 dry 130 130 NS NS 5 1 20% 12/4/07 2,300 2,200 500 230 23,000 7,000 7,000 NS NS 6 5 83% 1/14/08 40 500 130 300 40 230 230 300 NS 7 1 14% 2/7/08 800 1,300 700 800 260 170 170 NS NS 6 3 50% 3/4/08 800 300 170 1,300 20 220 220 NS NS 6 1 17% 4/8/08 40 300 110 900 70 170 170 NS NS 6 1 17% 5/13/08 ND 80 80 800 300 110 110 NS NS 6 1 17% 6/17/08 ND 220 70 3,000 500 140 140 130 dry 7 2 29% 7/8/08 2 4 80 1,400 50 500 130 300 dry 7 2 29% 8/12- 8/13/08 2 11 50 23 8 50 40 130 dry 7 0 0% 9/9- 9/10/08 13 30 30 220 dry 500 130 110 dry 6 1 17% 10/13/08 7 50 30 13 dry 300 300 20 dry 6 0 0% 11/17- 11/18/08 80 130 50 8 dry 130 130 110 dry 6 0 0% 12/9- 12/10/08 500 170 30 370 300 110 40 130 dry 7 0 0% 1/13- 1/17/09 80 80 130 700 50 1,300 110 20 40 8 2 25% 2/23- 2/24/09 300 170 600 170 130 67 40 110 80 8 1 13% 3/10- 3/11/09 300 300 230 60 50 30 80 20 40 8 0 0% 4/14- /15/09 2 50 230 220 40 90 80 40 ND 7 0 0% 5/12- 5/13/09 170 80 30 800 300 80 70 40 110 8 1 13% 6/9- 6/11/09 13 30 50 230 220 50 40 130 110 8 0 0% 7/14- 7/15/09 1 203 36 613 1,120 79 140 300 Dry 7 2 29% 8/10/09 1 108 98 140 10 52 40 110 Dry 7 0 0% 9/22- 9/28/09 10 1 dry 320 1,700 340 NS NS Dry 4 1 25% 10/27/09 53 95 dry 900 1,760 199 230 500 Dry 6 3 50% 11/17/09 1 10 dry 180 360 360 300 300 Dry 6 0 0% 12/17/09 134 31 373 414 556 272 300 80 Dry 7 2 29% 1/26/10 1,076 1,376 548 548 205 461 300 230 40 8 4 50% 2/17- 2/18/10 211 880 816 129 155 114 130 240 120 8 2 25% 3/15- 3/17/10 10 75 236 114 141 60 170 230 130 8 0 0%

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5/18- 5/19/10 31 20 37 91 143 71 50 70 170 8 0 0% 6/8-6/9/10 1 512 69 260 272 96 170 50 500 8 2 25% Total # of 42 74 72 69 62 39 71 33 14 430 Samples # Samples Exceeding 8 20 20 33 11 5 5 2 1 97 AB411 % Exceeding 19% 27% 28% 48% 18% 13% 7% 6% 7% 23% AB411 Values in Red represent exceedances of the AB411 Single Sample Standard of 400 MPN/100 mL. ND – Not Detected; NS – Not Sampled; dry – the site was dry (no samples collected

3.00

2.80

2.60

2.40

2.20

2.00

1.80

1.60

1.40 Geometric Mean 1.20 AB411 Single Sample Standard 1.00

t y ) ) ) e ic s f e C 6 5 8 Mean Log Fecal Coliform +/- 95% CI (MPN/ 100ml) (MPN/ CI 95% +/- Coliform Fecal Log Mean n i a a n l r 1 2 2 o r c e g O u l R R R Z a u l B L L L x P o M a i S S S @ D s ( ( ( @ M @ n l . R l g c R @ R o d i L a n L B i if S R L s R s c S L S n l @ l s a S o i R o P B H r L e C S @ iv r R l e r L O a S @ e h R S L S @ Main Stem Sampling Location (West to East) R L S

Figure 3: Relative mean concentrations ± 95% confidence intervals of Fecal Coliform bacteria in San Luis Rey River and in the Pacific Mix Zone.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 14 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Enterococcus Bacteria in the Main Stem

Enterococcus bacteria counts exceeded the State single sample standard of 104 MPN/100ml in 84 out of 258 (33%) samples analyzed (Table 5). For the FY 2009/2010, exceedances occurred throughout the sampling period with the greatest percentage (100%) recorded in July 2009 and June 2010. Douglas and Murray had the highest overall percentage of exceedances (62%); Douglas also had the highest mean concentration (Figure 4).

The overall mean counts of Enterococcus bacteria along the main stem of the San Luis Rey River were below the AB411 single sample standard (Figure 4). The lowest Enterococcus counts were found at Pacific and Shearer Crossing. The Pacific Mix Zone results were not significantly lower than the results at Pacific.

Table 5: Enterococcus Densities (MPN/100ml) in the Main Stem of San Luis Rey River. Date Zone Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 3/10/04 NS 52 265 2,063 116 NS 285 8 ND 7 4 57% 4/14/04 NS 290 170 310 200 NS 34 NS NS 5 4 80% 5/12/04 NS 110 63 259 51 NS 10 NS NS 5 2 40% 6/9/04 NS 10 490 230 292 NS 160 300 NS 6 5 83% 7/14/04 NS 300 130 50 dry NS 1,100 NS NS 4 3 75% 8/17/04 NS 400 98 dry dry NS 140 NS NS 3 2 67% 9/13/04 NS 36 470 dry dry NS 260 180 dry 4 3 75% 10/13/04 NS 360 170 81 dry NS 93 970 dry 5 3 60% 11/17/04 NS 96 300 2,240 310 NS NS 140 170 6 5 83% 12/15/04 NS 10 170 5,470 241 NS 31 140 40 7 4 57% 1/26/05 NS 300 600 330 940 NS 670 NS NS 5 5 100% 2/9/05 NS 20 850 420 31 NS 20 NS NS 5 2 40% 3/9/05 NS 93 500 240 170 NS 92 NS NS 5 3 60% 4/6/05 NS ND 122 180 52 NS 76 NS NS 5 2 40% 5/3/05 NS 171 110 180 190 NS 140 24,000 NS 6 6 100% 6/8/05 NS 78 190 280 170 NS 140 NS NS 5 4 80% 7/12- 7/13/05 NS 240 220 100 110 NS 160 NS NS 5 4 80% 8/9-8/10/05 NS 10 140 250 360 NS 270 NS NS 5 4 80% 9/6/05 NS 5 120 260 150 NS 175 NS NS 5 4 80% 10/4/05 NS 5 96 410 226 NS 132 NS NS 5 3 60% 11/1/05 NS 31 650 4,480 210 NS 140 NS NS 5 4 80% 12/7/05 NS 540 600 4,760 190 NS 3,040 40 40 7 5 71% 1/10/06 NS 300 1,870 170 170 NS 160 NS NS 5 5 100% 2/7/06 NS 190 330 4,220 74 NS 82 NS NS 5 3 60% 4/3/06 NS 31 30 780 84 NS 120 130 NS 6 3 50% 5/17/06 NS NS NS NS NS NS 700 NS NS 1 1 100% 5/30/06 NS 31 190 85 NS NS NS NS NS 3 1 33% 6/20/06 NS 108 340 87 110 NS 228 NS NS 5 4 80% 7/11/06 10 ND 540 88 200 NS 190 NS NS 5 3 60% 8/1/06 10 20 200 NS 260 NS 250 NS NS 4 3 75%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 15 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Zone Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 9/12/06 10 ND 290 NS 320 40 40 NS NS 4 2 50% 10/3/06 NS 20 130 NS 110 NS 80 NS NS 4 2 50% 11/7/06 10 ND 120 NS 213 NS 52 NS NS 4 2 50% 12/5/06 10 ND 240 4,510 260 80 80 NS NS 4 3 75% 1/9/07 10 135 1,290 85 NS 31 NS NS 5 2 40% 2/7/07 62 110 250 1,180 134 NS 98 NS NS 5 4 80% 3/6/07 20 190 310 490 88 130 130 NS NS 6 5 83% 4/3/07 10 58 76 360 76 NS 88 NS NS 5 1 20% 5/1/07 10 35 120 430 190 NS 200 NS NS 5 4 80% 6/5/07 60 ND 240 209 180 20 20 NS NS 5 3 60% 7/10/07 ND 10 160 144 31 230 230 NS dry 6 4 67% 8/7/07 10 ND 98 200 dry 93 93 NS dry 4 1 25% 9/4/07 ND ND 206 301 dry 31 31 NS dry 4 2 50% 10/2/07 185 93 320 52 dry 30 30 NS dry 5 1 20% 11/6/07 831 240 85 41 dry 100 100 NS NS 5 1 20% 12/4/07 380 360 86 210 770 942 942 NS NS 6 5 83% 1/14/08 62 73 20 98 31 52 52 300 NS 7 1 14% 2/7/08 450 743 677 2,224 158 161 161 NS NS 6 6 100% 3/4/08 98 213 233 759 41 155 155 NS NS 6 5 83% 4/8/08 ND 20 ND 1,274 122 148 148 NS NS 5 4 80% 5/13/08 41 ND 63 1,119 86 187 187 NS NS 5 3 60% 6/17/08 ND 359 31 488 1,203 84 84 500 dry 7 4 57% 7/8/08 21 326 70 613 687 64 230 500 dry 7 5 71% 8/12- 8/13/08 10 145 32 26 192 35 340 2,800 dry 7 4 57% 9/9-9/10/08 10 10 36 6 dry 16 110 130 dry 6 2 33% 10/13/08 20 63 61 15 dry 32 80 40 dry 6 0 0% 11/17- 11/18/08 31 122 2 25 dry 18 170 40 dry 6 2 33% 12/9- 12/10/08 146 31 12 2,420 1,414 12 20 130 dry 7 3 43% 1/13- 1/17/09 75 75 26 548 126 11 20 220 80 8 3 38% 2/23- 2/24/09 228 231 248 147 248 99 80 230 500 8 6 75% 3/10- 3/11/09 52 52 42 77 248 53 170 ND 70 7 2 29% 4/14-/15/09 10 10 47 148 142 86 170 ND 230 7 4 57% 5/12- 5/13/09 30 41 41 46 64 76 130 110 20 8 2 25% 6/9-6/11/09 10 41 111 225 435 112 170 230 300 8 7 88% 7/14- 7/15/09 13 170 110 1,300 700 500 170 170 7 7 100% 8/10/09 2 500 70 40 1 80 40 140 7 2 29% 9/22- 9/28/09 23 80 Dry 220 70 300 4 2 50% 10/27/09 5 260 Dry 80 500 170 97 213 6 4 67% 11/17/09 5 300 Dry 20 230 130 135 275 6 5 83% 12/17/09 130 130 300 130 130 170 85 86 7 5 71%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 16 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Zone Benet Pacific AB411 AB411 Bonsall Bonsall Murray Shearer Douglas Samples Crossing Total # of # Samples Exceeding Bridge OC Pacific Mix Bridge SDC % Exceeding Olive Hill Rd. 1/26/10 300 1,300 130 170 70 220 80 80 20 8 4 50% 2/17- 2/18/10 50 230 350 50 30 21 55 77 50 8 2 25% 3/15- 3/17/10 70 170 300 30 80 130 230 500 50 8 5 63% 5/18- 5/19/10 23 80 170 300 170 80 140 110 9 8 5 63% 6/8-6/9/10 8 3,000 170 500 350 170 230 130 130 8 8 100% Total # of 50 74 79 77 71 48 81 40 23 84 Samples # Samples Exceeding 8 32 48 48 44 16 41 24 5 258 AB411 % Exceeding 16% 43% 61% 62% 62% 33% 51% 60% 22% 33% AB411 Values in Red represent exceedances of the AB411 Single Sample Standard of 104 MPN/100ml. ND – Not Detected; NS – Not Sampled; ND- Not Applicable; dry – the site was dry (no samples collected)

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 17 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

2.80

2.60

2.40

2.20

2.00

1.80 +/- 95% CI (MPN/ 100ml) (MPN/ CI 95% +/- 1.60

1.40 Geometric Mean Enterococcus 1.20 AB411 Single Sample Standard

1.00

t y ) ) ) e ic s Mean Log Mean e 6 5 8 n if a a C n l r 1 2 2 o c g r O e R R R Z a u u ll B L L L x P o M a i S S S @ D s ( ( ( @ M @ n l . R l g R @ R o d ic L a L B in if S R L s R s c S L S n l @ l s a S o i R o P B H r L e C S @ iv r R l e r L O S a @ e h R S L S @ R L S Main Stem Sampling Location (West to East)

Figure 4: Relative mean concentrations ± 95% confidence intervals of Enterococcus bacteria in San Luis Rey River and in the Pacific Mix Zone.

Total Coliform Bacteria in Tributaries Total coliform bacteria samples collected from the tributaries to the San Luis Rey River exceeded the State single sample standard of 10,000 MPN/100ml in 61 out of 253 (24%) samples analyzed (Table 6). For FY 2009/2010, exceedances occurred throughout the sampling period with the highest percentage (40%) recorded in December 2009. Sleeping Indian Outlet had the highest percentage of exceedances (90%) - two to three times higher than other tributary sites. Sleeping Indian Outlet also had the highest mean total coliform concentration (Figure 5).

The overall mean concentrations of total coliform in the San Luis Rey River tributaries remained below the AB411 single sample standard (Figure 5). Two sampling locations, Sleeping Indian Outlet and Pilgrim Creek Outlet had mean concentrations that were significantly higher than any of the remaining tributaries. The mean concentration of total coliform bacteria at Sleeping Indian was also significantly higher than the AB411 standard.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 18 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Table 6: Total Coliform Densities (MPN/100ml) for Tributaries to the San Luis Rey River. Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples 3/10/04 5,000 1,300 NS NS 80 130 50 23 22 30 8 0 0% 4/14/04 8,000 dry NS NS NS NS NS NS NS NS 1 0 0% 6/9/04 dry dry NS NS 13,000 5,000 dry 11,000 2,300 30,000 5 3 60% 130,00 9/13/04 dry dry NS NS 0 23,000 dry 30,000 23,000 dry 4 4 100% 10/13/04 dry dry NS NS dry 17,000 dry 39,000 23,000 dry 3 3 100% 11/17/04 2,300 1,300 NS NS 8,000 8,000 8,000 12,000 24,000 24,000 8 3 38% 12/15/04 1,700 1,300 NS NS 1,700 1,400 1,400 1,700 1,700 1,700 8 0 0% 1/26/05 1,700 3,000 NS NS NS NS NS NS NS NS 2 0 0% 2/9/05 2,300 800 NS NS NS NS NS NS NS NS 2 0 0% 3/9/05 7,000 2,300 NS NS NS NS NS NS NS NS 2 0 0% 4/6/05 8,000 30,000 NS NS NS NS NS NS NS NS 2 1 50% 5/3/05 5,000 dry NS NS 5,000 5,000 NS NS NS NS 3 0 0% 6/8/05 14,000 dry NS NS NS NS NS NS NS NS 1 0 0% 7/12/05 17,000 dry NS NS NS NS NS NS NS NS 1 0 0% 8/9/05 3,000 dry NS NS NS NS NS NS NS NS 1 0 0% 10/4/05 5,000 dry NS NS NS NS NS NS NS NS 1 0 0% 12/7/05 30,000 dry NS NS NS NS NS NS NS 1,700 2 0 0% 1/10/06 11,000 dry NS NS NS NS NS NS NS NS 1 0 0% 2/7/06 13,000 dry NS NS NS NS NS NS NS NS 1 0 0% 4/3/06 23,000 dry NS NS 1,700 NS 5,000 5,000 5,000 5,000 6 0 0% 11,00 5/17/06 NS NS NS NS 8,130 8,000 0 11,000 11,000 13,000 6 4 67% 5/30/06 11,000 3,000 NS NS NS NS NS NS NS NS 2 0 0% 6/20/06 5,000 5,000 NS NS NS NS NS NS NS NS 2 0 0% 7/11/06 7,000 1,700 NS NS NS NS NS NS NS NS 2 0 0% 8/1/06 8,000 5,000 NS NS NS NS NS NS NS NS 2 0 0% 9/12/06 50,000 dry NS NS NS NS NS NS NS NS 1 0 0% 10/3/06 30,000 dry NS NS NS NS NS NS NS NS 1 0 0% 11/7/06 5,000 dry 23,000 NS NS NS NS NS NS NS 2 1 50% 12/5/06 22,000 dry 13,000 NS NS NS NS NS NS NS 2 1 50% 1/9/07 5,000 dry 8,000 NS NS NS NS NS NS NS 2 0 0% 2/7/07 8,000 230 NS NS NS NS NS NS NS NS 2 0 0% 3/6/07 30,000 NS 23,000 NS NS NS NS NS NS NS 2 1 50% 4/3/07 2,800 NS 22,000 NS NS NS NS NS NS NS 2 1 50% 5/1/07 8,000 NS 23,000 NS NS NS NS NS NS NS 2 1 50% 900,00 6/5/07 0 NS 13,000 NS NS NS NS NS NS NS 2 1 50% 7/10/07 dry NS 5,000 NS NS NS NS NS NS dry 1 0 0% 8/7/07 dry NS 13,000 NS NS NS NS NS NS dry 1 1 100% 9/4/07 dry NS 130,000 NS NS NS NS NS NS dry 1 1 100% 300,00 10/2/07 0 NS 17,000 NS NS NS NS NS NS dry 2 1 50% 11/6/07 dry NS 17,000 NS NS NS NS NS NS NS 1 1 100% 12/4/07 50,000 NS 13,000 NS NS NS NS NS NS NS 2 1 50%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 19 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples 1/14/08 3,000 NS 80,000 NS 1,100 24,000 NS 800 800 NS 6 2 33% 2/7/08 8,000 NS 13,000 NS NS NS NS NS NS dry 2 1 50% 3/4/08 2,200 NS 2,200 NS NS NS NS NS NS NS 2 0 0% 4/8/08 7,000 NS 80,000 NS NS NS NS NS NS NS 2 1 50% 5/13/08 8,000 NS 50,000 NS NS NS NS NS NS NS 2 1 50% 6/17- 18/2008 dry NS 17,000 1,100 1,100 3,000 2,200 2,200 1,700 dry 7 1 14% 7/8/08 dry NS 23,000 2,400 340 3,500 dry 1,700 16,000 dry 6 2 33% 8/12- 8/13/08 dry NS 80,000 800 3,000 9,000 dry 500 5,000 dry 6 1 17% 9/9- 9/10/08 dry NS 23,000 1,300 dry 9,000 dry 300 16,000 dry 5 2 40% 10/13/08 dry NS 23,000 NS dry 3,000 dry 700 1,700 dry 4 1 25% 11/17- 11/18/08 dry NS 5,000 NS dry 3,000 dry 800 30,000 dry 4 1 25% 12/9- 12/10/08 dry NS 50,000 NS 5,000 230 5,000 800 1,300 dry 6 1 17% 1/13- 1/17/09 5,000 NS 70,000 NS 220 170 1,300 220 300 500 8 1 13% 2/23- 2/24/09 13,000 NS 70,000 NS 220 300 500 210 700 220 8 1 13% 3/10- 3/11/09 50,000 NS 13,000 NS 1,100 500 500 110 300 500 8 1 13% 4/14- /15/09 5,000 NS 23,000 NS 1,700 500 800 230 700 800 8 1 13% 5/12- 5/13/09 30,000 NS 30,000 NS 260 5,000 dry 1,300 230 170 7 1 14% 6/9- 6/11/09 dry NS 23,000 NS 230 1,700 dry 300 340 1,300 6 1 17% 7/14- 7/15/09 dry NS 80,000 NS dry 9,000 dry 500 9,000 dry 4 1 25% 8/10/09 dry NS 110,000 NS dry 1,700 dry 220 5,000 dry 4 1 25% 9/22- 9/28/09 dry NS dry NS dry NS dry NS NS dry 0 0 NA 10/27/09 dry NS dry NS dry 9,000 dry 1,300 5,000 dry 3 0 0% 11/17/09 dry NS dry NS dry 16,000 dry 800 3,000 dry 3 1 33% 12/17/09 8,000 NS 110,000 NS dry 1,700 dry 1,300 11,000 dry 5 2 40% 1/26/10 5,000 NS 140,000 NS 9,000 9,000 2,400 9,000 2,800 16,000 8 2 25% 2/17- 2/18/10 2,300 NS 23,000 NS 1,600 1,600 1,600 NS NS NS 5 1 20% 3/15- 3/17/10 3,000 NS 23,000 NS 5,000 3,000 3,000 1,700 1,300 800 8 1 13% 5/18- 160,0 5/19/10 5,000 NS 23,000 NS 1,300 5,000 00 1,300 2,300 1,700 8 2 25% 6/8-6/9/10 13,000 NS 30,000 NS 5,000 3,000 dry 800 2,300 dry 6 1 17% Total # of 47 11 39 4 21 29 14 28 28 14 253 Samples

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 20 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples # Samples Exceeding 18 1 35 0 2 4 2 5 8 4 61 AB411 % Exceeding 38% 9% 90% 0% 10% 14% 14% 18% 29% 29% 24% AB411

Values in Red represent exceedances of the AB411 Single Sample Standard of 10,000 MPN/100 mL. ND – Not Detected; NS – Not Sampled; NA – Not Applicable; dry – the site was dry (no samples collected)

4.80 4.60 4.40 4.20 4.00 3.80 3.60 3.40 3.20 3.00 2.80 2.60 2.40 2.20 Geometric Mean AB411 Single Sample Standard 2.00 t t n ) ) ) ) ) ) ) e e 4 7 Mean Log Total Coliform +/- 95% CI (MPN/ 100ml) (MPN/ CI 95% +/- Coliform Total Log Mean l l a 4 2 1 6 7 t t i 3 0 0 2 1 2 1 u u d R R R R R R R n O O I L L L L L L L

k e S S S S S S S g ( ( ( ( ( ( ( e k in ...... e a y r r r r r r r p a L C C C C C C C e . . l e e W l k s l n n a m a y m m S a r i t C C s e r o a O j s n g i r F K l a a o i V e s e u h v P t h o B i c G s p i L o r a o t M E G s

O le t it L Tributary Sampling Location (West to East)

Figure 5: Relative mean concentrations ± 95% confidence intervals of Total Coliform bacteria in San Luis Rey River tributaries.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 21 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Fecal Coliform Bacteria in Tributaries Fecal coliform bacteria samples collected in tributaries to the San Luis Rey River exceeded the State single sample standard of 400 MPN/100ml in 55 out of 248 (22%) samples analyzed (Table 7). For FY 2009/2010, exceedances occurred throughout the sampling period with the highest percentage (100%) recorded in October 2009. The highest percentage of exceedances (68%) and the highest mean concentration occurred at Pilgrim Creek Outlet. With the exception of Pilgrim Creek Outlet, the mean concentrations of fecal coliform in all remaining tributaries were below the AB411 single sample standard (Figure 6).

Table 7: Fecal Coliform Densities (MPN/100 ml) for Tributaries to the San Luis Rey River . Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples 3/10/04 500 20 NS NS 8 4 ND 2 4 2 8 0 0% 4/14/04 230 dry NS NS NS NS NS NS NS NS 1 0 0% 6/9/04 dry dry NS NS 800 220 dry 20 220 5,000 5 2 40% 9/13/04 dry dry NS NS 8,000 20 dry 20 170 dry 4 1 25% 10/13/04 dry dry NS NS NS 110 dry 4,050 500 dry 3 2 67% 11/17/04 220 90 NS NS 110 130 130 75 230 110 8 0 0% 12/15/04 170 170 NS NS 170 230 80 20 82 90 8 0 0% 1/26/05 500 70 NS NS NS NS NS NS NS NS 2 0 0% 2/9/05 130 70 NS NS NS NS NS NS NS NS 2 0 0% 3/9/05 800 20 NS NS NS NS NS NS NS NS 2 0 0% 4/6/05 500 40 NS NS NS NS NS NS NS NS 2 0 0% 5/3/05 800 dry NS NS 300 40 NS NS NS NS 3 0 0% 6/8/05 7,000 dry NS NS NS NS NS NS NS NS 1 0 0% 7/12/05 11,000 dry NS NS NS NS NS NS NS NS 1 0 0% 8/9/05 500 dry NS NS NS NS NS NS NS NS 1 0 0% 10/4/05 1,700 dry NS NS NS NS NS NS NS NS 1 0 0% 12/7/05 1,700 dry NS NS 8 NS NS NS 224 1,024 4 1 25% 1/10/06 700 dry NS NS NS NS NS NS NS NS 1 0 0% 2/7/06 600 dry NS NS NS NS NS NS NS NS 1 0 0% 4/3/06 900 dry NS NS 40 5,040 40 40 170 360 7 1 14% 5/30/06 1,100 130 NS NS NS NS NS NS NS NS 2 0 0% 6/20/06 5,000 130 NS NS NS NS NS NS NS NS 2 0 0% 7/11/06 3,000 300 NS NS NS NS NS NS NS NS 2 0 0% 8/1/06 1,300 800 NS NS NS NS NS NS NS NS 2 1 50% 9/12/06 170 dry NS NS NS NS NS NS NS NS 1 0 0% 10/3/06 5,000 dry NS NS NS NS NS NS NS NS 1 0 0% 11/7/06 300 dry 170 NS NS NS NS NS NS NS 2 0 0% 12/5/06 800 dry 170 NS NS NS NS NS NS NS 2 0 0% 1/9/07 1,300 dry 500 NS NS NS NS NS NS NS 2 1 50% 2/7/07 2,200 40 NS NS NS NS NS NS NS NS 2 0 0% 3/6/07 700 NS 40 NS NS NS NS NS NS NS 2 0 0% 4/3/07 300 NS 170 NS NS NS NS NS NS NS 2 0 0% 5/1/07 300 NS 80 NS NS NS NS NS NS NS 2 0 0% 6/5/07 50,000 NS 40 NS NS NS NS NS NS NS 2 0 0%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 22 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples 7/10/07 dry NS 130 NS NS NS NS NS NS dry 1 0 0% 8/7/07 dry NS 140 NS NS NS NS NS NS dry 1 0 0% 9/4/07 dry NS 260 NS NS NS NS NS NS dry 1 0 0% 10/2/07 23,000 NS 2,200 NS NS NS NS NS NS dry 2 1 50% 11/6/07 dry NS 20 NS NS NS NS NS NS NS 1 0 0% 12/4/07 3,000 NS 300 NS NS NS NS NS NS NS 2 0 0% 1/14/08 300 NS 20 NS 230 330 NS 140 270 NS 6 0 0% 2/7/08 110 NS 70 NS NS NS NS NS NS dry 2 0 0% 3/4/08 210 NS 20 NS NS NS NS NS NS NS 2 0 0% 4/8/08 800 NS 230 NS NS NS NS NS NS NS 2 0 0% 5/13/08 2,200 NS 230 NS NS NS NS NS NS NS 2 0 0% 6/17- 18/2008 dry NS 1,300 NS 500 2,400 900 80 230 dry 6 4 67% 7/8/08 dry NS 30 80 40 140 dry 700 9,000 dry 6 2 33% 8/12- 8/13/08 dry NS 80 140 800 600 dry 130 270 dry 6 2 33% 9/9- 9/10/08 dry NS 3,000 300 dry 40 dry 20 1,400 dry 5 2 40% 10/13/08 dry NS 130 NS dry 130 dry 130 700 dry 4 1 25% 11/17- 11/18/08 dry NS 130 NS dry 500 dry 500 500 dry 4 3 75% 12/9- 12/10/08 dry NS 300 NS 5,000 130 800 110 340 dry 6 2 33% 1/13- 1/17/09 300 NS 80 NS 130 -99 1,300 80 170 80 8 1 13% 2/23- 2/24/09 800 NS 300 NS 220 130 500 20 500 140 8 2 25% 3/10- 3/11/09 17,000 NS 500 NS 1,100 170 230 ND 230 40 7 2 29% 4/14- /15/09 230 NS 130 NS 1,100 110 800 20 210 300 8 2 25% 5/12- 5/13/09 70 NS 170 NS 40 1,300 dry 340 130 70 7 1 14% 6/9- 6/11/09 dry NS 26 NS 130 1,100 dry 80 220 70 6 1 17% 7/14- 7/15/09 dry NS 402 NS dry 130 dry 40 1,100 dry 4 2 50% 8/10/09 dry NS 5,670 NS dry 130 dry 70 5,000 dry 4 2 50% 9/22- 9/28/09 dry NS dry NS dry NS dry NS NS dry 0 0 NA 10/27/09 dry NS dry NS dry 1,100 dry 800 1,300 dry 3 3 100% 11/17/09 dry NS dry NS dry 80 dry 80 300 dry 3 0 0% 12/17/09 1,850 NS 1,354 NS dry 220 dry 110 500 dry 5 2 40% 1/26/10 387 NS 1,733 NS 230 130 40 130 130 300 8 1 13% 2/17- 2/18/10 387 NS 980 NS 50 50 300 NS NS NS 5 1 20% 3/15- 276 NS 1,414 NS 500 23 300 130 500 170 8 3 38%

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 23 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

3.40 3.20 3.00 2.80 2.60 2.40 2.20 2.00 1.80 1.60 1.40 1.20 Geometric Mean AB411 Single Sample Standard 1.00 t t n ) ) ) ) ) ) ) e e 4 2 1 6 4 7 7

Mean Log Fecal Coliform +/- 95% CI (MPN/ 100ml) FecalLogMean Coliform95% +/-(MPN/ CI l l a t t i 3 0 0 2 1 2 1 u u d R R R R R R R n O O I L L L L L L L

k e S S S S S S S g ( ( ( ( ( ( ( e k in ...... e a y r r r r r r r p a L C C C C C C C e e e W . . l l l k s n n a m y m m S a r a i t C C s e r o a O j s n g i r a F K l a o i V e s e u h v P t h B i o c G s p i L o r a o t M E G s

O le t it Tributary Sampling Location (West to East) L

Figure 6: Relative mean concentrations ± 95% confidence intervals of Fecal Coliform bacteria in San Luis Rey River tributaries. Location means with letters in common are not significantly different ( α= 0.05).

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment B Page 24 of 30 FY 2009-10 Activity Implementation Summary Sheet SLR-001

Enterococcus Bacteria in Tributaries

Enterococcus bacteria samples collected in tributaries to the San Luis Rey River exceeded the State single sample standard of 104 MPN/100ml in 151 out of 253 (60%) samples analyzed (Table 8). During FY 2009/ 2010, exceedances occurred throughout the sampling period with the highest percentage (67%) found in October 2009. Of currently sampled locations, Pilgrim Creek Outlet had the highest percentage of exceedances (92%). The highest bacterial density of 5,000 MPN/ 100ml (for FY 2009/ 2010) was measured at Live Oak Creek in August 2009.

The mean bacterial counts in most of the tributaries significantly exceeded the AB411 single sample standard for Enterococcus bacteria (Fig. 7). The exceptions were the Guajome Lake Outlet (not sampled since February 2007), Moosa Canyon Creek, Bonsall Creek (SLRR26), Ostrich Farm Creek (SLR14), and Keys Creek (SLR17).

Table 8: Enterococcus Densities (MPN/100ml) for Tributaries to the San Luis Rey River. Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples 3/10/04 336 216 NS NS 2 4 4 2 2 2 8 1 13% 4/14/04 310 dry NS NS NS NS NS NS NS NS 1 0 0% 6/9/04 dry dry NS NS 700 260 dry 230 80 3,000 5 4 80% 9/13/04 dry dry NS NS 3,500 130 dry 40 800 dry 4 3 75% 10/13/04 dry dry NS NS dry 110 dry 170 2,300 dry 3 3 100% 11/17/04 160 170 NS NS 500 170 800 635 110 500 8 7 88% 12/15/04 180 21,100 NS NS 40 170 230 40 20 40 8 3 38% 1/26/05 350 31 NS NS NS NS NS NS NS NS 2 0 0% 2/9/05 410 52 NS NS NS NS NS NS NS NS 2 0 0% 3/9/05 10 31 NS NS NS NS NS NS NS NS 2 0 0% 4/6/05 200 170 NS NS NS NS NS NS NS NS 2 1 50% 5/3/05 360 dry NS NS 500 700 NS NS NS NS 3 2 67% 6/8/05 660 dry NS NS NS NS NS NS NS NS 1 0 0% 7/12/05 760 dry NS NS NS NS NS NS NS NS 1 0 0% 8/9/05 710 dry NS NS NS NS NS NS NS NS 1 0 0% 10/4/05 390 dry NS NS NS NS NS NS NS NS 1 0 0% 12/7/05 1,150 dry NS NS NS NS 44 844 840 40 5 2 40% 1/10/06 1,000 dry NS NS NS NS NS NS NS NS 1 0 0% 2/7/06 410 dry NS NS NS NS NS NS NS NS 1 0 0% 4/3/06 260 dry NS NS 3,500 270 360 360 230 NS 6 5 83% 5/17/06 NS dry NS NS NS NS NS NS 70 NS 1 0 0% 5/30/06 140 73 NS NS NS NS NS NS NS NS 2 0 0% 6/20/06 200 140 NS NS NS NS NS NS NS NS 2 1 50% 7/11/06 1,060 150 NS NS NS NS NS NS NS NS 2 1 50% 8/1/06 1,710 270 NS NS NS NS NS NS NS NS 2 1 50% 9/12/06 2,070 dry NS NS NS NS NS NS NS NS 1 0 0% 10/3/06 340 dry NS NS NS NS NS NS NS NS 1 0 0% 11/7/06 240 dry 170 NS NS NS NS NS NS NS 2 1 50% 12/5/06 140 dry 830 NS NS NS NS NS NS NS 2 1 50%

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Date Creek Creek Outlet Outlet AB411 # Samples Keys Creek % Exceeding Little Gopher Ostrich Farm Bonsall Creek Pilgrim Creek Canyon Creek Guajome Lake Moosa Canyon East Vista Way Sleeping Indian Live Oak Creek Exceeding AB411 Total # of Samples 1/9/07 130 dry 160 NS NS NS NS NS NS NS 2 1 50% 2/7/07 2,550 120 NS NS NS NS NS NS NS NS 2 1 50% 3/6/07 1,130 NS 340 NS NS NS NS NS NS NS 2 1 50% 4/3/07 150 NS 360 NS NS NS NS NS NS NS 2 1 50% 5/1/07 1,000 NS 1,400 NS NS NS NS NS NS NS 2 1 50% 6/5/07 18,820 NS 465 NS NS NS NS NS NS NS 2 1 50% 7/10/07 dry NS 119 NS NS NS NS NS NS dry 1 1 100% 8/7/07 dry NS 490 NS NS NS NS NS NS dry 1 1 100% 9/4/07 dry NS 191 NS NS NS NS NS NS dry 1 1 100% 10/2/07 18,980 NS 1,200 NS NS NS NS NS NS dry 2 1 50% 11/6/07 dry NS 63 NS NS NS NS NS NS NS 1 0 0% 12/4/07 720 NS 260 NS NS NS NS NS NS NS 2 1 50% 1/14/08 243 NS 73 NS 220 500 NS 500 220 NS 6 4 67% 2/7/08 305 NS 228 NS NS NS NS NS NS dry 2 1 50% 3/4/08 97 NS 221 NS NS NS NS NS NS NS 2 1 50% 4/8/08 488 NS 2,400 NS NS NS NS NS NS NS 2 1 50% 5/13/08 201 NS 2,187 NS NS NS NS NS NS NS 2 1 50% 6/17- 18/2008 dry NS 985 NS 300 500 170 170 300 dry 6 6 100% 7/8/08 dry NS 3,654 500 300 170 dry 500 800 dry 6 6 100% 8/12- 8/13/08 dry NS 2,723 500 800 300 dry 270 800 dry 6 6 100% 9/9- 9/10/08 dry NS 1,733 230 dry 1,100 dry 80 220 dry 5 4 80% 10/13/08 dry NS 2,282 NS dry 300 dry 90 270 dry 4 3 75% 11/17- 11/18/08 dry NS 2,420 NS dry 1,300 dry 80 50,000 dry 4 3 75% 12/9- 12/10/08 dry NS 959 NS 500 800 2,400 130 300 dry 6 6 100% 1/13- 1/17/09 687 NS 1,553 NS 300 40 500 220 80 300 8 5 63% 2/23- 2/24/09 1,120 NS 1,733 NS 230 220 300 70 130 230 8 6 75% 3/10- 3/11/09 2,143 NS 496 NS 2,200 170 230 80 500 210 8 6 75% 4/14- /15/09 1,300 NS 1,986 NS 270 40 300 110 500 170 8 6 75% 5/12- 5/13/09 76 NS 250 NS 220 3,000 dry 300 800 70 7 5 71% 6/9- 6/11/09 dry NS 1,733 NS 300 1,300 dry 230 500 300 6 6 100% 7/14- 7/15/09 dry NS 4 NS dry 500 dry 40 1,700 dry 4 2 50% 8/10/09 dry NS 40 NS dry 300 dry 80 5,000 dry 4 2 50% 9/22- 9/28/09 dry NS dry NS dry NS dry NS NS dry 0 0 NA 10/27/09 dry NS dry NS dry 173 dry 96 135 dry 3 2 67%

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Values in Red represent exceedances of the AB411 Single Sample Standard of 104 MPN/100ml. ND – Not detected; NS – Not Sampled; dry – the site was dry (no samples collected)

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3.40

3.20

3.00

2.80

2.60

2.40

+/- 95% CI (MPN/ 100ml) (MPN/ CI 95% +/- 2.20

2.00

1.80 Enterococcus Geometric Mean 1.60 AB411 Single Sample Standard

t t n ) ) ) ) ) ) )

Mean Log Mean e e 4 7 l l a 4 2 1 6 7 t t i 3 0 0 2 1 2 1 u u d R R R R R R R n O O I L L L L L L L

O le t it L Tributary Sampling Location (West to East)

Figure 7: Relative mean concentrations ± 95% confidence intervals of Enterococcus bacteria in San Luis Rey River tributaries.

Results of the Correlation Analysis of Bacterial Counts between the River Mouth and the Pacific Shoreline

Tables 3 through 5 list bacterial concentrations as detected in samples collected at Pacific (located at the mouth of the River) and Pacific Mix (located at the shoreline 75 feet south of the river mouth) for total coliform (Table 3), fecal coliform (Table 4) and Enterococcus (Table 5). The results of the correlation analysis between the bacterial concentrations at the mouth of the River and the Pacific shoreline are presented in Table 9. The correlation coefficient ( r) gives a measure of the nature and magnitude of each correlation. Positive r values indicate that counts at the two sites increase or decrease together; negative values of r indicate that while counts at one location increase, they decrease at the other; the higher the value of r, the stronger the correlation with a higher percentage of variability in bacterial counts being explained by the sampling location. P-values lower than 0.05 indicate statistically significant correlations.

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As indicated by the r value of 0.64 the total coliform counts were strongly correlated between the two locations. Moderate correlations were also found for fecal coliform ( r = 0.56) and Enterococcus (r = 0.32). All correlations were statistically significant at α = 0.05 indicating that at least some of the bacteria in the Pacific Mix may have originated from the SLR River mouth and, conversely, bacteria originating from the Pacific Ocean during incoming tides may have also affected the counts in the River mouth. Because the correlation was strongest for total coliforms, this may be especially true for the total coliform indicator.

Table 9: Results of the correlation analysis of the bacterial concentrations of 45 sample pairs, each collected at the mouth of SLR River and at the Pacific shoreline. The bacterial counts were log-transformed to normalize the data. The correlation coefficients (Pearson’s r2) and their corresponding p values are presented. Total Coliform Fecal Coliform Enterococcus r2 P R2 P r2 p 0.64 <0.001 0.56 <0.001 0.32 0.008

Summary of Results and Discussion Generally, sampling locations with the greatest frequency of AB411 single sample standard exceedances also had the highest overall mean bacterial concentrations. Also, in the main stem of the River, one location (Douglas) had the highest mean concentration and frequency of exceedances for all measured bacterial indicator species. In the future, special focus should be placed on Douglas as well as the tributaries with the highest rate of exceedances and the highest mean concentrations of indicator bacteria. These locations should be considered for prioritization in any special investigations of the sources of bacteria. Furthermore, it is suggested that flow be measured as accurately as possible by both jurisdictions in order to estimate bacterial loadings to the River from the tributaries.

Throughout the study period (March 2004 through June 2010) Enterococci exceeded the State single sample standard more often than total coliform and fecal coliform in both the San Luis Rey River and at tributary mouths (Tables 3 through 8). Similarly, while the mean concentrations of total coliform and fecal coliform indicators remained below their corresponding AB411 single sample standards (Figures 2,3,5 and 6), the overall mean concentration of Enterococcus in the San Luis Rey River and tributary locations studied generally exceeded that standard (Figures 4 and 7).

The mean indicator bacteria concentrations as well as percent exceedances varied quite widely between the samples collected from Bonsall Bridge by the County and those taken by the City. This variability may be due to patchy distribution of bacteria (microplumes) in the River occurring on both spatial and temporal scales. Variability due to the possible patchy temporal distribution of bacteria could be minimized if the sampling at Bonsall Bridge by the two jurisdictions was conducted within the same time interval. Up to this point, the City samples are being collected in the morning while the County’s are taken in the early afternoon or, sometimes, the next day.

The design of the current study does not address, in detail, the confounding factors of differing bacteria decay and re-growth rates or the possible influence of local bird populations on fecal

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indicator bacteria concentrations in the water. As mentioned above, single grab samples were employed in the current study, the results may have been affected by short-term localized changes in bacterial counts that may not always have been representative. As an example, Douglas, the site with the highest percent exceedances, during the dry season does not have any upstream influence and is usually ponded or slightly flowing with shallow groundwater seepage. In addition, visual observations between Douglas and the next upstream site have not identified any contributing storm drains or other point sources. Other potential sources may need to be investigated.

The significantly lower mean concentrations of Enterococcus and total coliform bacteria at Pacific as compared to the other main stem river sites may be attributed to the site’s location at the mouth of San Luis Rey River. The River mouth is an estuarine environment influenced by the Pacific Ocean (as indicated by high chloride concentration and high conductivity; Attachment E) and the survival rates of indicator bacteria are lower in salt water as opposed to fresh water environments (Anderson et.al., 2005 and Lisle et. al., 2004). With respect to the correlated bacterial counts from the River mouth and the shoreline nearby, it is possible that at least some of the bacteria in the Pacific Mix Zone may have originated from the River. Alternatively, bacteria originating from the Pacific Ocean during incoming tides may have also affected the counts at the River mouth.

In general, the source of bacteria at the mouth of the San Luis Rey River remains undetermined. It is likely that the contamination at the shoreline does not originate from the River and/or its tributaries but from local sources such as shorebird feces, etc. This, however, must be investigated further and is one component to the City bacteria source tracking study being implemented with grant funds from Proposition 50.

References Anderson, K.L., J. E. Whitlock and V. J. Harwood. 2005. Persistence and Differential Survival of Fecal Indicator Bacteria in Subtropical Waters and Sediments. Applied Environmental Microbiology. 71(6): 3041–3048.

Lisle, J.T., J.J. Smith, D.D. Edwards and G.A. McFeters. 2004. Occurrence of Microbial Indicators and Clostridium perfringens in Wastewater, Water Column Samples, Sediments, Drinking Water, and Weddell Seal Feces Collected at McMurdo Station, Antarctica. Applied Environmental Microbiology. 70(12): 7269–7276.

California Regional Water Quality Control Board San Diego Region Resolution No. R9-2010- 0001. February 10, 2010. A Resolution Amending The Water Quality Control Plan For The San Diego Basin (9) To Incorporate Revised Total Maximum Daily Loads For Indicator Bacteria, Project I - Twenty Beaches And Creeks In The San Diego Region (Including Tecolote Creek). http://www.waterboards.ca.gov/sandiego/board_decisions/adopted_orders/2010/R9_2010 _0001_FINAL.pdf

SPSS Inc. 2003. SPSS® software products. Chicago IL.

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ATTACHMENT C TO SLR-001

SAN LUIS REY WATERSHED WATER QUALITY MONITORING PROGRAM ACTIVITY 2009-10 SLR WURMP Annual Report

Total Dissolved Solids and Chloride Study In the San Luis Rey River and its Tributaries

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Introduction In 2002, the lower 19 miles of the San Luis Rey River were added to the State Water Resources Control Board (SWRCB) Section (§)303(d) list of impaired waterbodies for TDS and chloride and they remain on the 2006 303(d) list and the 2010 303(d) list that was partially approved by the USEPA on November 18, 2010. The water quality objectives for TDS and chloride are based on the beneficial uses for the San Luis Rey River assigned in the Water Quality Control Plan (Basin Plan, RWQCB, 1994). The Basin Plan objectives for TDS and chloride are 500 mg/L and 250 mg/L, respectively.

The San Luis Rey River WUMRP group initiated a monitoring program in March 2004. The purpose of the program was to determine which areas along main stem of San Luis Rey River and its tributaries exhibit the highest concentrations of TDS and chloride. From March 2004 through June 2010, the City of Oceanside and the County of San Diego collected surface water samples in the San Luis Rey River and its tributaries and analyzed them for TDS and chloride as well as several other constituents. The results of the study are presented below.

Total dissolved solids (TDS) are comprised of inorganic salts and small amounts of organic matter that are dissolved in water. The principal constituents are usually the cations calcium, magnesium, sodium, and potassium, and the anions carbonate, bicarbonate, chloride, sulphate, and, particularly in groundwater, nitrates and phosphates (from agricultural use). TDS in water supplies may originate from natural sources such as weathering rocks and soils, leaves, silt and plankton. Other sources of TDS include point sources such as industrial wastewater and sewage as well as the urban and agricultural runoff. Chlorides are a component of TDS; they are salts composed of the chlorine gas and a metal molecule. The common chlorides include sodium chloride and magnesium chloride. While moderate concentrations of chlorides are essential to life, excessive amounts are toxic to plant and animal life. The sources of chlorides can be natural and man-made. The man-made sources include point sources such as industrial wastewater and sewage as well as the urban and agricultural runoff.

Hydrologic Setting The San Luis Rey River originates mainly in the Palomar and Hot Springs Mountains. In 1922, Henshaw Dam was built and Lake Henshaw was formed at the base of Palomar Mountain. No imported water is released directly into the lake and TDS and chloride concentrations in the lake fall below Basin Plan standards. The Vista Irrigation District (VID) owns Lake Henshaw and uses the Lake as a drinking water reservoir. Downstream of Lake Henshaw, water from the main channel of the River is diverted into the man-made Escondido Canal, seven miles below the dam. Nearly all non-storm flows are diverted from that section of SLR River into the canal, typically leaving the River dry below the diversion. The flow in the remainder of SLR River is intermittent through Pauma and Pala. The River is perennial through Oceanside, although it flows underground in several sections during dry weather.

Precipitation in the coastal portion of the watershed is about 11 inches/yr, 17 inches/yr in the coastal plains and valleys, and Palomar Mountain receives about 45 inches/yr. On an annual basis, there are two distinct climatic periods in the area – a dry (semi-arid) period from late April to mid-October, and a wet period from mid-October to late April. The wet period typically

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment C Page 1 of 12 FY 2009-10 Activity Implementation Summary Sheet SLR-001 provides 85 to 90 percent of the annual average rainfall in the coastal areas. The River is generally dry in the summer months except for locations where groundwater seeps and springs emanate in the River bed and form perennial riparian habitats. There are three groundwater basins within the lower San Luis Rey Watershed: Bonsall, Mission and Moosa Canyon. The basins provide baseflow surface water to sections of the River that would otherwise be dry during the dry season.

Methods From March 2004 through June 2010, 18 locations (Figure 1) were sampled: seven by the City of Oceanside and 12 by the County of San Diego (Table 1). Both agencies collected samples on the same days or within one or two days of one another. Seven sampling sites were located along the San Luis Rey River and 11 in the River’s tributaries. One site along the River’s main stem, Bonsall Bridge (SLR16), was sampled by both agencies for quality control.

Both the City of Oceanside and the County of San Diego took in-situ field measurements for pH, temperature, electrical conductivity, dissolved oxygen, and turbidity. A hand-held flow meter or the floating object technique was used to estimate flow. Instantaneous flow rate was also estimated at each sampling location by multiplying averaged results of three instantaneous current velocity measurements by approximate channel width and depth. The County of San Diego personnel conducted flow measurements whenever water quality samples were collected throughout the study period. Throughout the City of Oceanside, flow in the San Luis Ray River is intermittent during summer and extensive (unwadable) during winter thus difficult to measure. Due to those difficulties, flow measurements were attempted but not recorded by the City of Oceanside personnel prior to July 2007. The City then began recording tributary flow measurements and continues to work to collect more accurate main stem flow data.

On each sampling occasion a grab sample was also collected at each site and sent to an analytical laboratory to test for total dissolved solids (TDS), total suspended solids (TSS), alkalinity, chloride, magnesium, manganese, total iron, sulfate, potassium, sodium, calcium and hardness. The County also analyzed grab samples for fluoride and boron. The methods used for the in-situ measurements and the laboratory analysis are presented in Table 2. All samples were collected during non-storm flow conditions; i.e. at least 72 hours following any rain event with precipitation greater or equal to 0.10 inches.

For samples where TDS was not measured directly, electrical conductivity was used as an indirect measure for TDS. The average ratio of electrical conductivity to direct measured TDS is 0.68. Therefore, the electrical conductivity measurements were multiplied by 0.68(*1000) to calculate TDS.

Analysis of Data The means and 95% confidence intervals were calculated for the TDS and chloride concentrations and they were plotted for the tributaries and main stem sites separately (Figure 2). This was done to look for any differences among sites and to compare them to the overall mean concentrations and Basin Plan objectives.

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In order to determine which constituents may contribute to the TDS concentrations, and to what extent, the Pearson product-moment correlation coefficient ( r) was calculated between all soluble constituents measured (including chloride) and TDS (SPSS Inc., 2003). The Pearson product- moment correlation coefficient is a measure of the tendency of two variables to increase or decrease together. The coefficient ranges from −1 to 1. When r = 1, the two variables are 100% correlated as one increases together with the other. When r = −1 shows, there is a 100% negative correlation where the value of one variable decreases as the value of the other increases. Values of r that fall between 1 and -1 indicate the extent of the positive or negative relationship and r = 0 is equivalent to no linear relationship between the two variables. In the present report, the higher the value of r, the greater the association of a given constituent concentration with TDS concentration ( p < 0.05 1 ) (SPSS Inc., 2003). The results of the Pearson product-moment correlation analysis are presented in Table 3.

1 p value indicates the probability that an observed result (here: correlation coefficient or r) occurred by chance alone. A result is conventionally regarded as ‘statistically significant’ if the likelihood that it is due to chance alone is less than five times out of 100 ( p < 0.05).

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Figure 1. Sample site locations.

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Table 1: Sample Site Identification and Locations City of Oceanside Sampling Locations Site ID Site Description Latitude Longitude Pacific San Luis Rey River southeast of Parking Lot #10 33.20303 -117.39117 Benet SLR River at USGS Station west of Benet Bridge 33.21790 -117.35958 approximately 850ft downstream of bridge SLR River on the east side of Douglas Dr, north of Douglas 33.24051 -117.32238 Hwy 76/Douglas Dr. Tributary to north side of SLR River at end of Flood Pilgrim Creek Control Embankment, entered from Whelan Ranch 33.24103 -117.3359 Outlet Road SLR River on the north side of Murray Bridge at Murray 33.2505 -117.29866 intersection of College Blvd. and Vandergrift Blvd. Sleeping Indian Tributary to north side of SLR River; South of 33.25998 -117.26422 intersection of Sleeping Indian Rd and North River Rd.

Bonsall Bridge SLR River under the Bonsall Bridge 33.26042 -117.23833

County of San Diego Sampling Locations Site ID Site Description Latitude Longitude Bonsall Bridge SLR River under the Bonsall Bridge 33.26042 -117.23833 (SLR16) Olive Hill (SLR25) SLR River at Olive Hill Road 33.28838 -117.22335 Shearer Crossing SLR River at Pankey Road 33.33281 -117.14975 (SLR28) Moosa Canyon Creek Moosa Canyon Creek tributary at Old River Road 33.283600 -117.218683 (SLR01) Little Gopher Canyon Little Gopher Canyon Creek tributary at Old 33.265683 -117.233200 Creek (SLR02) River Road Bonsall Creek Bonsall Creek tributary at Highway 76 33.28959 -117.22525 (SLR26) Ostrich Farm Creek Ostrich Farm Creek tributary at Highway 67 33.29335 -117.22396 (SLR14) Live Oak Creek Live Oak Creek tributary at Highway 67 33.31514 -117.19418 (SLR27) Keys Creek (SLR17) Keys Creek tributary at Dunlin Road 33.32363 -117.15744 Moulder Ranch Creek Moulder Ranch Creek tributary 33.30205 -117.21691 (SLR31) Horse Ranch Creek Horse Ranch Creek tributary 33.33138 -117.15067 (SLR 32) East Vista Way Tributary to SLR River East of East Vista Way 33.25872 -117.23931 (SLR 34) and Mission Rd. Intersection

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Table 2: Water Quality Parameters and Methods for San Luis Rey River City of Oceanside County of San Diego Measured Parameter Methods Methods Estimated, Global Flow Flow Probe Flow Probe FP101 pH In-situ, Hydrolab Quanta In-situ, Horiba U-10 Temperature In-situ, Hydrolab Quanta In-situ, Horiba U-10 Conductivity In-situ, Hydrolab Quanta In-situ, Horiba U-10 Dissolved Oxygen In-situ, Hydrolab Quanta In-situ, Horiba U-10 Turbidity In-situ, Hydrolab Quanta In-situ, Horiba U-10 Total Dissolved Solids SM 2540 C EPA 160.1; SM 2540 C Total Suspended Solids SM 2540 D EPA 160.2; SM 2540 D Bicarbonate Alkalinity SM 2320 B EPA 310.1, SM 2320 B Carbonate Alkalinity NM EPA 310.1, SM 2320 B Hydroxide, Alkalinity NM SM 2320 B Total Alkalinity SM 2320 B SM 2320 B Chloride EPA 300.0 EPA 300.0 Magnesium EPA 200.7 EPA 200.7; EPA 200.8m; EPA 6010 Manganese EPA 200.7 EPA 200.7; EPA 6010 Iron, Total EPA 6010 EPA 200.7; EPA 200.8m; EPA 6010 Sulfate EPA 300.0 EPA 300.0; SM4500 SO4 E Potassium EPA 200.7 EPA 200.7; EPA 200.8m; EPA 6010 Sodium EPA 200.7 EPA 200.7; EPA 200.8m; EPA 6010 Calcium EPA 200.7 EPA 200.7 Hardness EPA 130.2 EPA 130.2; SM 2340 B Boron, Total NM EPA 200.8; EPA 200.7 Fluoride NM EPA 300.0; SM 4500 F C NM – Not Measured

Results and Discussion All data collected during FY 2009/2010 are listed in Attachment E. The mean TDS and chloride concentrations +/- 95% confidence intervals as measured along the main stem of and tributaries to the San Luis Rey River are presented in Figure 2. Table 3 presents the results (Pearson’s r) of the correlation analysis between TDS and other mineral constituents including chloride.

Generally, the results of this study were not significantly altered by the addition of FY 2009/2010 data. The mean TDS concentrations exceeded the Basin Plan objective of 500 mg/L both along the main stem of San Luis Rey River and in its tributaries by approximately three-fold (Figs. 3A and C). With the exception of Shearer Crossing and East Vista Way sampling locations, the chloride Basin Plan objective of 250 mg/L was also exceeded (Fig. 3B and D).

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A. 2000

1900

1800

1700

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1500 Overall Mean

1400

1300

1200

1100

1000

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800

Mean TDS Concentration Mean TDS Concentration +/- 95% Conf. Int. (mg/L) 700

600 Basin Plan Objective 500

400 SLR@Benet SLR@Douglas SLR@Murray SLR@Bonsall SLR@Bonsall SLR@Olive Hill SLR@Shearer (OC) (SLR16) Rd. (SLR25) Crossing (SLR28)

450 B. 430 410

390

370

350 Overall Mean 330

310

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270

250 Basin Plan Objective 230

Mean Mean Cl- Concentration +/-210 95% Conf. Int. (mg/L)

190

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150 SLR@Benet SLR@Douglas SLR@Murray SLR@Bonsall SLR@Bonsall SLR@Olive Hill SLR@Shearer (OC) (SLR16) Rd. (SLR25) Crossing (SLR28)

SLR Main Stem Location (West to East)

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C. 3000 2900 2800 2700 2600 2500 2400 2300 2200 2100 2000 1900 Overall Mean 1800 1700 1600 1500 1400 1300 1200 1100 1000

Mean TDS Concentration Mean TDS Concentration +/- 95% Conf. Int. (mg/L) 900 800 700 600 Basin Plan Objective 500 400 Pilgrim Guajome Sleeping East Vista Little Moosa Cn. Bonsall Cr. Ostrich Live Oak Cr. Keys Cr. Creek Outlet Lake Outlet Indian Way Gopher Cn. Cr. (SLR01) (SLR26) Farm Cr. (SLR27) (SLR17) (SLR34) Cr. (SLR02) (SLR14)

D. 1000

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900

850

800

750

700

650

600

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450 Overall Mean 400

350 Mean Cl- Mean +/- Concentration Conf. (mg/L) Int. 95% 300

250 Basin Plan Objective 200

150 Pilgrim Guajome Sleeping East Vista Little Gopher Moosa Cn. Bonsall Cr. Ostrich Farm Live Oak Cr. Keys Cr. Creek Outlet Lake Outlet Indian Way Cn. Cr. Cr. (SLR01) (SLR26) Cr. (SLR14) (SLR27) (SLR17) (SLR34) (SLR02) SLR Tributary (West to East)

Figure 2: Mean concentrations +/- 95% confidence intervals of TDS (A and C) and chloride (B and D) at sampling sites along the main stem of (A and B) and tributaries (C and D) to the San Luis Rey River.

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Table 3: Results of the correlation analysis between TDS and other mineral constituents. Pearson’s r values are presented for each site and mineral constituent as it was correlated to TDS. Statistically significant r values are outlined in bold. Results significant at p < 0.05 are marked with single asterisks (*). Double asterisks (**) indicate results that are significant at p < 0.01. Tests were not performed when n<5.

Carbonate Bicarbonate Site Cl- Mg SO4 K Na Ca Mn Fe tot B tot Fl Alkalinity Alkalinity SLR @ Pacific St. Crossing .69(**) .72(**) .57(**) .78(**) .94(**) .59(*) .20 .39 SLR @ Benet Bridge .91(**) .70(**) .59(**) -.16 .64(*) .72(**) .65(**) -.29 SLR @ Douglas Bridge .70(**) .56(**) .53(**) -.34 .63(*) .59(*) .01 .11 SLR @ Murray Bridge .77(**) .79(**) .72(**) .77(**) .98(**) .97(**) -.16 -.04 SLR @ Bonsall Bridge - OC .91(**) .88(**) .46(**) .18 .46 .82(**) .36 -.25 .75 SLR @ Bonsall Bridge (SLR16) .64(**) .30(*) .94(**) .04 .38 .44(*) -.39(*) -.29 -.65(*) -.34 .78(**) .40 SLR @ Olive Hill Rd. (SLR25) .66(*) .86(**) .77(**) .26 .44(*) .60(**) -.35 -0.58(**) -.87(**) -.79(**) .62(*) .62(**) SLR @ Shearer Crossing (SLR28) 0.47 .65(*) 0.37 -.29 .16 .29 .00 .02 .70(*) .72 .14 Pilgrim Creek Outlet .83(**) .91(**) .86(**) .49 .97(**) .60(*) -.25 -.47 Guajome Lake Outlet .71(*) .54 .37 Sleeping Indian .60(**) 0.44(*) 0.41(*) .75(**) .37 .75(**) -.16 -.03 Little Gopher Canyon Creek (SLR02) .15 0.51(*) 0.31 -.09 .30 .31 -.73 -.06 .49 -.32 .28 .08 Moosa Canyon Creek (SLR01) .30 0.46(*) 0.11 -.05 .21 .20 -.05 .26 .34 .43 .18 -.11 Bonsall Creek (SLR26) .29 .78(**) 0.55(*) .13 .63(*) .71(**) .87 -.23 -.27 .31 -.14 .41 Ostrich Farm Creek (SLR14) .40(*) .30 .69(**) .17 .17 .22 .17 .36 .64(*) .15 -.02 -.22 Live Oak Creek (SLR27) .84(**) .05 .20 .71(**) -.13 -.18 -.33 .15 .20 .45 .11 .09 Keys Creek (SLR17) .17 0.66(**) .78(**) -.19 .71(**) .69(**) .78(*) -.38 -.19 -.18 -.70 -.24

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Along the main stem of the River, the easternmost location, Shearer Crossing had the lowest mean concentration of TDS and chloride and the westernmost location, Benet Br. had the highest (Fig. 3A and B). For the tributaries, Pilgrim Creek Outlet had TDS and chloride concentrations that were significantly higher than the remaining tributaries and the main stem sampling sites (Fig. 3C and D). Sleeping Indian, not sampled before FY 2006/2007, also had an equally high mean TDS concentration but the mean chloride concentration at the Sleeping Indian tributary was not significantly different from all other tributaries further upstream. This is most likely because TDS concentration at Pilgrim Creek was most highly correlated with sodium, magnesium, sulfide and chloride while TDS at Sleeping Indian was most highly correlated with calcium and potassium (Table 3). The mineral composition of TDS at Pilgrim Creek renders that tributary characteristically different from the remaining ones. This point is further illustrated in Appendix C to SLR-001 of the 2007-2008 WURMP report (WURMP, 2008). Appendix C also contains an analysis and discussion regarding the relationship of the ionic composition of water samples collected from the different sampling locations to that in the ground water basins directly below.

Generally, it may be concluded that the mean concentrations of both TDS and chloride in the San Luis Rey River tend to increase from east to west and mostly exceed the surface water Basin Plan objectives. Those mean concentrations are very similar to the mean groundwater concentrations which indicate that groundwater is influencing water quality in the main stem of the River and its tributaries (WURMP, 2008). The exceptions are Pilgrim Creek tributary (for TDS and chloride) and Sleeping Indian tributary (for TDS).

The San Luis Rey River flows through an alluvial valley that contains unconfined groundwater and there is a considerable interchange between surface flow and groundwater flow within the valley. According to NBS/Lowry (1995), the surface infiltration of river flow can exceed 30 cfs during periods of significant runoff. Conversely, surfacing groundwater can contribute several cfs to surface flows during the dry season. Therefore, the shallow groundwater and surface waters of the alluvial San Luis Rey River valley are considered one hydrogeologic system. As shown in Figure 5, groundwater quality in the San Luis Rey River continually degrades from the mountains towards the coastline. The areas that contain TDS concentration below 500 mg/L are restricted to upper reaches of the watershed in areas where there is minimal use of irrigation water. The TDS in shallow aquifers near the coast are typically above 1500 mg/L as a result of saltwater incursion and salt loads due to imported water use. This pattern is mirrored by the results of the present study.

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Figure 5: Variation in TDS concentration in shallow groundwater wells throughout the San Luis River watershed (adopted from the 2003 WURMP Report, PBS and J, 2003).

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References Izbicki, John A. Evaluation of the Mission, Santee, and Tijuana hydrologic subareas for reclaimed-water use, San Diego County. United States Geological Survey, Water Resource Investigation Report 85-4032. September 1985.

MEC Analytical Systems, Inc.. San Luis Rey River Water Quality Evaluation, Technical Memorandum to the San Diego Regional Water Quality Control Board. 2001.

NBS/Lowry. 1995. Groundwater Feasibility Study, Emergency Water Storage for San Diego County.

PBS and J. 2003. Watershed Urban Runoff Management Program Report: San Luis Rey Watershed. Prepared for the California Regional Water Quality Control Board (Region 9) on behalf of City of Oceanside, County of San Diego, City of Vista and City of Escondido. http://www.projectcleanwater.org/pdf/wurmp/slr_2002_wurmp.pdf

SPSS Inc. 2003. SPSS® software products. Chicago IL.

State of California Department of Water Resources. Ground Water Occurrence and Quality, San Diego Region. Bulletin 106-2. 1967.

State of California Department of Water Resources. Water Quality Report on Pauma, Pala, and Bonsall Ground Water Basins. 1965a.

State of California Department of Water Resources. San Diego Cooperative Groundwater Studies, Reclaimed Water Use, Phase II, Mission, Santee/El Monte, and Tijuana Hydrologic Subareas. August 1984.

Watershed Urban Runoff Management Program (WURMP) Report. 2008. Attachment C to the Water Quality Activity SLR-001. Total Dissolved Solids and Chloride Study In the San Luis Rey River and its Tributaries.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment C 12 of 12

ATTACHMENT D TO SLR-001

SAN LUIS REY WATERSHED WATER QUALITY MONITORING PROGRAM ACTIVITY 2009-10 SLR WURMP Annual Report

Nutrient Joint Monitoring Study In the San Luis Rey River and its Tributaries

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Introduction

The lower 19 miles of the San Luis Rey (SLR) River are listed for total nitrogen and phosphorus on the 2008 California State Water Resources Control Board (SWRCB) Clean Water Act Section 303(d) List of Water Quality Limited Segments that was partially approved by the USEPA on November 18, 2010. Furthermore, the upper SLR River is also listed for total nitrogen on the 2008 303(d) list. The water quality objectives are narrative and based on the requirement that water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. According to the Water Quality Control Plan for the San Diego Region (Basin Plan), a desired goal to prevent plant nuisance in streams and other flowing waters is 0.1 mg/L total P. This value is not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold values have not been set for nitrogen compounds; however, natural ratios of nitrogen to phosphorus are to be determined by surveillance and monitoring and upheld. If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used (RWQCB, 1994).

Nitrogen and phosphorus-containing compounds in streams may originate from agricultural sources where the excess of nutrients from fertilizers leach out of the soil and is transported into the river and its tributaries in surface runoff and subsurface discharges. Other sources of nutrients include failed septic tanks, urban runoff and wastewater/ sewage spills. Much of the San Luis Rey River dry weather flow (or base flow) during the summer months originates from groundwater seeps and springs in the river bed. Those seeps and springs may also have elevated nutrient levels.

The San Luis Rey River WUMRP group initiated a nutrient monitoring program in March 2004. The purpose of the program is to address the following questions:

1) Which areas along main stem of San Luis Rey River and its tributaries exhibit the highest concentrations of nutrients? 2) What are the possible sources of those high concentrations? 3) What are the possible solutions to addressing the high nutrient concentrations?

From March 2004 through June 2010, the City of Oceanside (City) and the County of San Diego (County) collected surface water samples in the San Luis Rey River and its tributaries and analyzed them for ammonia-N, nitrate-N and orthophosphate-P using field test kits. Some grab samples were also analyzed in the laboratory for ammonia-N, nitrate-N, nitrite-N, total Kjeldahl nitrogen (TKN), orthophosphate-P and total phosphorus (Table 2). The results of the study are presented below.

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Hydrologic Setting

The San Luis Rey River originates mainly in the Palomar and Hot Springs Mountains. In 1922, Henshaw Dam was built and Lake Henshaw was formed at the base of Palomar Mountain. No imported water is released directly into the lake and TDS and chloride concentrations in the lake fall below Basin Plan standards. The Vista Irrigation District (VID) owns Lake Henshaw and uses the Lake as a source of drinking water. Seven miles downstream of the Lake Henshaw dam, water from the main channel of the River is diverted into the man-made Escondido Canal. Nearly all non-storm flows are diverted from that section of the SLR River into the canal, which discharges to Lake Wohlford in the Carlsbad Watershed. The flow in the remainder of SLR River is intermittent through Pauma and Pala. The River is perennial through Oceanside, although it flows underground in several sections during dry weather.

Precipitation in the coastal portion of the watershed is about 11 inches/yr, 17 inches/yr in the coastal plains and valleys, and about 45 inches/yr at Palomar Mountain. On an annual basis, there are two distinct climatic periods in the area – a dry (semi-arid) period from late April to mid-October, and a wet period from mid-October to late April. The wet period typically provides 85 to 90 percent of the annual average rainfall in the coastal areas. The River is generally dry in the summer months except for locations where groundwater seeps and springs emanate in the river bed and support perennial riparian habitats. There are three groundwater basins within the lower San Luis Rey Watershed: Bonsall, Mission and Moosa Canyon. The basins provide baseflow surface water to sections of the River that would otherwise be dry during the dry season.

Methods

Water Quality Sampling From March 2004 through June 2010, 18 locations (Figure 1) were sampled: seven by the City and 12 by the County (Table 1). Both agencies collected samples on the same days or within one or two days of one another. Seven sampling sites were located along the San Luis Rey River and 11 in the mouths of the River’s tributaries. One site along the River’s main stem, Bonsall Bridge (SLR16), was sampled by both agencies for quality control.

Both the City and the County conducted in-situ testing for dissolved oxygen. On each sampling occasion, a hand-held flow meter or the floating object technique was used to measure current velocity that was then multiplied by the approximate channel width and depth to estimate instantaneous flow rate. County conducted the instantaneous flow measurements whenever water quality samples were collected throughout the study period. Throughout the City, flow in the SLR River is intermittent during summer and extensive (unwadable) during winter. Due to these factors, flow measurements were attempted but not recorded by City personnel prior to July 2007. The City then began recording instantaneous flow rates in the tributaries and continues to work to collect more accurate main stem flow data.

Prior to 2005, field test kits were employed to collect most of the nutrient data by both the County and the City. Prior to October 2009, the City used field test kits exclusively while the County supplemented field test kit results with analytical laboratory testing. After October 2008,

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment D Page 2 of14 FY 2009-10 Activity Implementation Sheet SLR-001 the County discontinued all field test kit testing in favor of laboratory analysis. The City initiated the same process in October 2009. Because field test kit results supplied only estimated data with respect to concentrations of nitrate-N, ammonia-N and orthophosphate-P, total nitrogen and total phosphorus concentrations are not available for sampling dates when field test kits were employed. Because, prior to November 2008, the County analyzed laboratory samples periodically for total phosphorus, orthophosphate-P, nitrate-N and ammonia-N only, total nitrogen concentration data are not available for the subset of samples collected from September 2006 through October 2008.

The methods used for the in-situ dissolved oxygen measurements, field test kits, and the analytical laboratory analysis are presented in Table 2. All samples were collected during dry weather, which was defined as at least 72 hours following any rain event with precipitation greater than or equal to 0.10 inches.

Analysis of Data For the purpose of data analysis, all non-detect values were assigned one half of the method detection limit. To calculate the means and standard deviations, field test kit and analytical data for ammonia-N, nitrate-N and orthophosphate-P were combined. The mean nitrate-N, orthophosphate-P and ammonia-N concentrations and their 95% confidence intervals were then compared among the SLR River main stem sites and tributary locations using bar graphs.

Summary statistics (mean, instantaneous loadings (mg/s), and flux (mg/s/acre)) were also calculated for the tributaries, using tributary drainage areas (in acres) and estimated flows where available. Mean instantaneous loads were calculated by identifying each month’s instantaneous load and then calculating the mean dry weather load for the entire sampling period (2004 through June 2010). Flux was calculated by dividing instantaneous loads by the area of the drainage corresponding to each sampling location.

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Bonsall SLR River under the Bonsall Bridge 33.26042 -117.23833

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Table 2: Water Quality Parameters and Methods for San Luis Rey River Measured City of Oceanside County of San Diego Parameter Method RL/ MDL Method RL/ MDL Flow Estimated, Global Flow Probe Flow Probe FP101 0.01 cfs Dissolved Oxygen In-situ, Hydrolab Quanta 1 mg/L In-situ, Horiba U-10 1 mg/L Ammonia as N CHEMetrics test kit 0.05/ 0.01 mg/L CHEMetrics K-1501 and K-1403 0.01 mg/L Nitrate as N CHEMetrics test kit 1/ 0.1 mg/L CHEMetrics V-6933 and K-6923 0.1 mg/L Orthophosphate as P CHEMetrics test kit 0.05/ 0.01 mg/L CHEMetrics V-8513 and K-8593 0.01 mg/L Ammonia as N SM 4500 (since Oct. 2010) 0.1/ 0.05 mg/L EPA 350.2, SM4500 , EPA 300.0 0.05/0.01 mg/L Nitrate as N SM 4500 (since Oct. 2010) 0.05/ 0.01 mg/L SM4500, EPA 300.0 0.05/ 0.01 mg/L Nitrite as N SM 4500 (since Oct. 2010) 0.05/ 0.01 mg/L EPA354.1, SM4500, EPA 300.0 0.05/ 0.01 mg/L SM 4500 (since Oct. 2010) 0.5 mg/L EPA351.1, SM4500 (since Nov. Total Kjeldahl Nitrogen 2008) 1.0/ 0.5 mg/L Total Nitrogen By Calculation (since Oct. 2010) NA By Calculation (since Nov. 2008) NA Organic Nitrogen By Calculation (since Oct. 2010) NA By Calculation (since Nov. 2008) NA Orthophosphate as P SM 4500 (since Oct. 2010) 0.05/ mg/L EPA 365.2, SM4500, EPA 300.0 0.05/ 0.01 mg/L SM 4500 (since Oct. 2010) 0.05/ mg/L EPA 365.3, SM4500 (since Dec. 0.05/ 0.01 mg/L Total Phosphorus 2005) NM – Not Measured

Results

All data collected during FY 2009/2010 are listed in Table 10 of Attachment A. For locations upstream of Bonsall Bridge, including SLR16 (County jurisdiction), the total phosphorus results reflect data collected after August 2006, while total nitrogen measurements were available only after October 2008. Downstream of Bonsall (within City boundaries), total phosphorus and total nitrogen analysis were performed only on samples collected after September 2009. As mentioned above, all nutrient data collected by the City prior to October 2009 were obtained with field test kits, while the County employed an analytical laboratory for nutrient analysis periodically prior to November 2008 and exclusively thereafter.

Table 3 lists the numbers of samples analyzed, the means and standard deviations for the sample concentrations of ammonia, nitrate-N, total nitrogen, orthophosphate-P and total phosphorus at each location sampled between 2004 and June of 2010. Both the mean total nitrogen and total phosphorus concentrations exceeded the Basin Plan water quality objectives (WQOs) of 0.1 mg/L for total phosphorus and 1.0 mg/L for total nitrogen at all monitored locations. Along the main stem of the River, the mean total phosphorus concentration increased gradually from east to west with the lowest value (0.15 mg/L) recorded at the upstream-most location, Shearer Crossing (SLR28), and the highest (0.59 mg/L) measured at Pacific station, located furthest downstream. This pattern was not apparent for total nitrogen for which the highest mean concentration (10.3 mg/L) was recorded at Shearer Crossing and the lowest at Bonsall (1.8 mg/L). Of the tributaries, Sleeping Indian had the highest total nitrogen and total phosphorus concentrations. Nutrient concentrations at the mouth of all remaining tributaries sampled were orders of magnitude lower.

The mean nitrate-N concentrations and corresponding 95% confidence intervals for the River’s main stem and the monitored tributaries are plotted in Figure 2. For the main stem, nitrate-N concentrations at Murray Bridge and Shearer Crossing were significantly higher than at any of the remaining locations. For the tributaries, Sleeping Indian had nitrate-N concentrations that were more than six times higher than any of the remaining tributaries. East Vista Way (SLR34)

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment D Page 6 of14 FY 2009-10 Activity Implementation Sheet SLR-001 and Guajome Lake Outlet had the second highest nitrate-N concentrations, while the lowest was recorded for Bonsall Creek (SLR26) and Pilgrim Creek Outlet.

The mean orthophosphate-P concentrations and corresponding 95% confidence intervals for the River’s main stem and tributary mouths are presented in Figure 3. Along the main stem, Benet and Douglas had the highest orthophosphate-P concentrations. The lowest concentrations were found furthest upstream at Olive Hill (SLR25) and Shearer Crossing (SLR28). For the tributaries, the mean orthophosphate-P concentration was highest at Pilgrim Creek and lowest at Keys Creek (SLR17) as it generally tended to decrease from west to east.

Figure 4 shows the mean ammonia-N concentrations and corresponding 95% confidence intervals. In general, ammonia-N exhibited a pattern similar to that of orthophosphate-P as its mean concentrations tended to increase from east to west.

When the mean, dry weather instantaneous loadings were calculated for the tributary locations (Table 4), the highest total nitrogen load was found at Keys Creek followed by Moosa Canyon Creek. Pilgrim Creek Outlet had the highest total phosphorus loading and Moosa Canyon Creek had the second highest. It must be noted, however, that the instantaneous nutrient loads at all locations sampled were highly variable as reflected by very high values of standard deviation. This is most likely due to the large variability in the estimated instantaneous flow measurements as well as to the small sample size, especially for total nitrogen and total phosphorus. Furthermore, the highest nutrient loading and flux for nitrate-N and orthophosphate-P were found for Guajome Lake Outlet. However, these high values are based on only one sample point where flow rate at that location was unusually high. Sampling at Guajome Lake Outlet was discontinued after April 2008 as the site became dry. The highest total phosphorus flux was calculated for Pilgrim Creek Outlet, but Ostrich Farm Creek had the highest flux for orthophosphate-P. Similar to instantaneous loading, nutrient flux was highly variable among samples as it was affected by the high variability in the estimated instantaneous discharge rates and the small sample sizes.

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Table 3. Number of samples analyzed (N), mean concentrations in mg/L (Avg) and standard deviations (S) of samples collected from locations along the SLR River and its tributaries from 2004 through June 2010. Main stem locations and tributaries are listed separately downstream to upstream. Field test kit and analytical laboratory results were combined for ammonia-N, nitrate-N and orthophosphate-P.

Ammonia-N Nitrate-N Total Nitrogen Orthophosphate-P Total Phosphorus Sampling Location N Avg SN Avg SN Avg SN Avg SN Avg S SLR @ Pacific 55 0.74 1.24 20 4.19 2.96 60 0.33 0.29 SLR @ Benet 65 0.54 0.58 50 4.10 4.37 2 3.43 1.07 65 0.79 0.58 2 0.59 0.50 SLR @ Douglas 60 0.48 0.52 48 4.93 5.84 3 2.92 1.64 60 0.79 1.54 3 0.51 0.25 SLR @ Murray 55 0.43 0.51 44 10.63 9.43 3 6.15 0.64 55 0.39 0.19 3 0.43 0.21 SLR @ Bonsall - OC 31 0.24 0.11 32 1.59 2.26 3 3.04 2.61 32 0.30 0.14 7 0.25 0.13 SLR @ Bonsall (SLR16) 69 0.38 0.62 54 4.55 6.56 21 1.80 1.46 69 0.42 0.89 29 0.19 0.21 SLR @ Olive Hill Rd. (SLR25) 65 0.13 0.12 67 0.35 12.52 21 1.85 1.30 64 0.12 0.06 33 0.18 0.12 SLR @ Shearer Crossing (SLR28) 49 0.12 0.10 48 9.22 3.09 11 10.31 1.59 46 0.12 0.05 15 0.15 0.13 Pilgrim Creek Outlet 43 0.58 0.61 34 2.56 2.20 2 1.61 1.07 43 0.91 0.74 2 0.53 0.30 Guajome Lake Outlet 12 0.70 0.82 5 17.24 11.77 12 0.67 0.39 1 0.18 NA Sleeping Indian 32 0.27 0.15 33 71.51 20.86 2 105.30 8.73 34 0.52 0.53 2 0.66 0.18 East Vistay Way (SLR34) 4 0.04 0.01 4 13.58 1.58 4 0.13 0.03 4 0.16 0.04 Little Gopher Cn. Cr. (SLR02) 55 0.14 0.11 56 8.54 7.74 12 7.57 2.11 54 0.09 0.09 22 0.16 0.18 Moosa Cn. Cr. ('SLR01) 64 0.14 0.10 66 4.02 4.51 21 3.21 1.51 63 0.32 0.15 33 0.38 0.14 Bonsall Cr. (SLR26) 41 0.15 0.12 41 2.81 8.37 9 1.29 0.47 40 0.10 0.09 15 0.17 0.18 Ostrich Farm Cr. (SLR14) 65 0.13 0.12 68 5.04 2.10 21 6.00 1.04 65 0.26 0.13 32 0.30 0.14 Live Oak Cr. (SLR27) 68 0.12 0.11 67 6.37 2.47 21 6.52 1.43 65 0.18 0.23 32 0.23 0.18 Keys Cr. (SLR17) 44 0.14 0.11 40 6.79 5.85 10 7.18 2.54 42 0.09 0.06 15 0.14 0.17

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Table 4. Mean estimated instantaneous loadings (mg/s) (Avg) with the corresponding numbers of samples analyzed ( N) and standard deviations ( S) calculated for tributaries monitored from 2004 through June 2010. Field test kit and analytical laboratory results were combined for ammonia-N, nitrate-N and orthophosphate-P.

Ammonia-N Nitrate-N Total Nitrogen Orthophosphate-P Total Phosphorus Sampling Location N Avg SN Avg SN Avg SN Avg SN Avg S Pilgrim Creek Outlet 22 1.1 1.5 26 6.0 17.1 2 422.5 589.5 22 5.7 17.2 2 132.4 184.2 Guajome Lake Outlet 3 29.8 51.5 3 2,342.8 4,053.8 3 37.3 64.3 1 0.0 NA Sleeping Indian 29 0.5 1.4 34 162.0 612.2 2 179.1 193.3 31 1.1 3.6 2 1.4 1.6 East Vista Way (SLR34) 4 0.1 0.1 5 34.0 32.5 4 0.4 0.2 4 0.4 0.2 Little Gopher Cn. Cr. (SLR02) 54 8.9 16.2 56 820.8 2,584.4 12 212.3 211.0 54 12.7 44.3 22 19.3 66.2 Moosa Cn. Cr. (SLR01) 64 29.5 50.8 69 1,022.8 1,919.6 21 702.1 1,253.8 63 85.8 172.0 33 86.1 220.4 Bonsall Cr. (SLR26) 40 8.3 22.7 42 168.2 412.0 9 15.5 13.9 40 8.8 24.7 15 11.6 36.6 Ostrich Farm Cr. (SLR14) 65 25.5 113.2 68 760.9 2,302.3 21 274.6 258.9 65 55.0 199.1 32 39.1 140.8 Live Oak Cr. (SLR27) 65 11.1 25.4 69 858.7 2,647.0 21 341.8 408.1 65 16.9 49.0 32 21.8 65.9 Keys Cr. (SLR17) 43 26.8 40.6 45 1,698.1 3,475.8 10 1,534.2 2,046.6 42 26.5 50.2 15 46.1 105.4

Table 5. Mean estimated instantaneous flux (mg/s/acre) (Avg) with the corresponding numbers of samples analyzed ( N) and standard deviations ( S) calculated for tributaries monitored from 2004 through June 2010. Field test kit and analytical laboratory results were combined for ammonia-N, nitrate-N and orthophosphate-P.

Ammonia-N Nitrate-N Total Nitrogen Orthophosphate-P Total Phosphorus Sampling Location N Avg SN Avg SN Avg SN Avg SN Avg S Pilgrim Creek Outlet 22 0.0002 0.0002 22 0.0012 0.0030 2 0.0691 0.0964 22 0.0009 0.0028 2 0.0216 0.0301 Guajome Lake Outlet 3 0.0450 0.0779 3 3.5464 6.1363 3 0.0564 0.0973 1 0.0000 NA Sleeping Indian 29 0.0009 0.0028 30 0.3592 1.2718 2 0.3504 0.3782 31 0.0022 0.0071 2 0.0027 0.0032 East Vista Way (SLR34) 4 0.0003 0.0002 4 0.1344 0.0963 4 0.0012 0.0005 4 0.0014 0.0007 Little Gopher Cn. Cr. (SLR02) 54 0.0013 0.0023 56 0.1163 0.3662 12 0.0301 0.0299 54 0.0018 0.0063 22 0.0027 0.0094 Moosa Cn. Cr. (SLR01) 64 0.0011 0.0019 66 0.0397 0.0724 21 0.0261 0.0466 63 0.0032 0.0064 33 0.0032 0.0082 Bonsall Cr. (SLR26) 40 0.0040 0.0109 41 0.0827 0.1998 9 0.0075 0.0066 40 0.0042 0.0119 15 0.0056 0.0176 Ostrich Farm Cr. (SLR14) 65 0.0035 0.0157 67 0.1072 0.3220 21 0.0382 0.0360 65 0.0076 0.0277 32 0.0054 0.0196 Live Oak Cr. (SLR27) 65 0.0020 0.0046 67 0.1612 0.4892 21 0.0623 0.0744 65 0.0031 0.0089 32 0.0040 0.0120 Keys Cr. (SLR17) 43 0.0011 0.0017 40 0.0805 0.1531 10 0.0646 0.0862 42 0.0011 0.0021 15 0.0019 0.0044

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14.00 13.00 12.00 11.00 10.00 9.00 8.00 7.00 6.00 5.00 4.00 3.00 2.00 Nitrate-N Concentration Concentration +/-(mg/L) Nitrate-N 95% CI 1.00 0.00 Bridge -Bridge OC SLR @ @ Benet SLR Bridge -Bridge SDC SLR @ @ Pacific SLR Rd. (SLR25) Rd. SLR @ @ Murray SLR SLR @ Bonsall @ Bonsall SLR @ Bonsall SLR SLR @ @ Douglas SLR SLR @ Olive Hill @ Hill Olive SLR SLR @ Shearer @ Shearer SLR Crossing (SLR28) Crossing

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20.00 Nitrate-N Nitrate-N Concentration (mg/L) +/- 95% CI 10.00

0.00 (SLR34) (SLR14) ('SLR01) Creek (SLR02) Creek SleepingIndian Little GopherLittle Cn EastVistay Way Ostrich Farm OstrichFarm Cr. Moosa Cn Creek MoosaCreek Cn Keys Cr. (SLR17) BonsallCr.(SLR26) Pilgrim Creek PilgrimCreek outlet Guajome Lake Guajome Lake Outlet Live Oak Oak LiveCr. (SLR27) Figure 2. Mean concentrations and 95% Confidence intervals of nitrate-N in the main stem of San Luis Rey River and its tributaries. Station locations are listed along the horizontal axis from West to East.

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0.10 Orhtophosphate-P Concentration Concentration +/-(mg/L) Orhtophosphate-P CI 95% 0.00 Bridge -Bridge OC SLR @ @ Benet SLR Bridge -Bridge SDC SLR @ @ Pacific SLR Rd. (SLR25) Rd. SLR @ @ Murray SLR SLR @ Bonsall @ Bonsall SLR @ Bonsall SLR SLR @ @ Douglas SLR SLR @ Olive Hill @ Hill Olive SLR SLR @ Shearer @ Shearer SLR Crossing (SLR28) Crossing

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Orthophosphate-P Orthophosphate-P Concentration (mg/L) +/-0.10 95% CI

0.00 (SLR34) (SLR14) ('SLR01) Creek (SLR02) Creek SleepingIndian LittleGopher Cn EastVistay Way Ostrich Farm OstrichFarm Cr. Moosa Cn Creek MoosaCreek Cn Keys Cr. (SLR17) BonsallCr.(SLR26) Pilgrim Creek PilgrimCreek outlet Guajome Lake Guajome Lake Outlet Live Oak Oak Live Cr. (SLR27) Figure 3. Mean concentrations and 95% Confidence intervals of Orthophosphate-P in the main stem of San Luis Rey River and its tributaries. Station locations are listed along the horizontal axis from West to East.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment D Page 11 of14 FY 2009-10 Activity Implementation Sheet SLR-001

1.20

1.10

1.00

0.90

0.80

0.70

0.60

0.50

0.40

0.30

0.20 Ammonia-N Concentration Concentration +/-(mg/L) Ammonia-N 95% CI

0.10

0.00 Bridge -Bridge OC SLR @ @ Benet SLR Bridge -Bridge SDC SLR @ @ Pacific SLR Rd. (SLR25) Rd. SLR @ @ Murray SLR SLR @ Bonsall @ Bonsall SLR @ Bonsall SLR SLR @ @ Douglas SLR SLR @ Olive Hill @ Hill Olive SLR SLR @ Shearer @ Shearer SLR Crossing (SLR28) Crossing

1.20

1.10

1.00

0.90

0.80

0.70

0.60

0.50

0.40

0.30 Ammonia-N Concentration (mg/L) +/- 95% CI 0.20

0.10

0.00 (SLR34) (SLR14) ('SLR01) Creek (SLR02) Creek SleepingIndian Little GopherLittle Cn EastVistay Way Ostrich Farm OstrichFarm Cr. Moosa Cn Creek Creek Moosa Cn Keys Cr. (SLR17) BonsallCr.(SLR26) Pilgrim Creek PilgrimCreek outlet Guajome Lake Guajome Lake Outlet Live Oak Oak LiveCr. (SLR27) Figure 4. Mean concentrations and 95% Confidence intervals of Ammonia in the main stem of San Luis Rey River and its tributaries. Station locations are listed along the horizontal axis from West to East.

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment D Page 12 of14 FY 2009-10 Activity Implementation Sheet SLR-001

Discussion

The lower 19 miles of the San Luis Rey River are listed for total nitrogen and total phosphorous on the partially approved 2008 CWA 303(d) list of impaired waterbodies. This study provides preliminary information on nutrient concentrations, loading, and flux in this segment of the River and its tributaries. Presently, the water quality objective (WQO) employed for nutrients is a narrative objective to prevent biostimulatory growth of algae with a current goal of 0.1 mg/L for total phosphorus and 1 mg/L for total nitrogen. These values are not to be exceeded more than 10% of the time. Nitrogen and phosphorous loading can result in low dissolved oxygen and increased algal blooms in stream segments. Addressing these adverse effects requires the use of appropriate WQOs based on the level of nutrients a waterbody can sustainably assimilate. This level varies greatly due to site-specific factors such as hydrology, shading, and temperature, which modulate biological response to nutrients. Current N and P WQOs are problematic in part because they do not consider site-specific factors. The Nutrient Numeric Endpoint (NNE) framework, an alternative regulatory approach advocated by SWRCB staff and USEPA Region 9, is currently under development.

Samples collected in the present study were taken during dry weather only and, therefore, represent nutrient concentrations that are only characteristic of non-storm flows. Water quality samples were collected in the main stem of the lower River and at the mouths of some of its tributaries, thus helping to characterize nutrient concentrations at those locations only. The sample locations were not selected at random and therefore cannot be used to characterize the conditions of the entire study area. Because samples were collected at the mouths of the tributaries, resulting data provide information as to the nutrient concentrations in flows entering the River but not about possible sources upstream of those locations. Since the same locations have been sampled for six years, a trend analysis could be performed to examine any temporal characteristics of the data. However, because field test kits were used for most of the sampling period, trend analysis may not be very accurate.

Given these limitations, the results of the study show that both the mean total nitrogen and total phosphorus concentrations exceeded the Basin Plan water quality objectives (WQOs) of 0.1 mg/L for total phosphorus and 1.0 mg/L for total nitrogen at all monitored locations. Along the main stem of the River, mean total phosphorus concentrations increased gradually from upstream (east) to downstream (west), but this pattern was not observed for total nitrogen for which the highest mean concentration (10.3 mg/L) was recorded at the easternmost sampling location. Of the tributaries, Sleeping Indian had the highest total nitrogen and total phosphorus concentrations; nutrient concentrations at the mouth of all remaining tributaries sampled were orders of magnitude lower.

Instantaneous nutrient loads were calculated for tributary mouths only using instantaneous discharge estimates and grab sample concentrations. The instantaneous nutrient loads at all sampled locations were highly variable, which was likely due to the large variability in the estimated instantaneous flow measurements as well as the small sample size. Given this large variability and the instantaneous nature of the measurements, it is difficult to compare loads among locations. The results (Table 4) are therefore only preliminary. The Sleeping Indian

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment D Page 13 of14 FY 2009-10 Activity Implementation Sheet SLR-001 tributary, in spite of having very high nutrient concentrations, did not contribute the highest instantaneous nutrient loadings. Instead, the highest total nitrogen loading was identified at Keys Creek, followed by Moosa Canyon Creek. Pilgrim Creek Outlet had the highest total phosphorus loading and Moosa Canyon Creek had the second highest.

The instantaneous load estimates were transformed into flux (load per unit area) by dividing the load values by the drainage areas of the corresponding tributaries (Table 5). As with mean concentrations, the Sleeping Indian tributary had the highest total nitrogen flux; Pilgrim Creek Outlet was the second highest. Pilgrim Creek Outlet also had the highest total phosphorus flux. Similar to instantaneous loading, nutrient flux was highly variable among samples as it was affected by the high variability in the estimated instantaneous discharge rates and the small sample sizes.

Improved flow measurements and continued laboratory analysis for nutrient constituents would help increase the accuracy of trend analysis and estimates of nutrient loading and flux in the watershed. As always, this will have to be balanced with considerations of cost. If future funding permits, the San Luis Rey joint monitoring program may be modified to include alternative studies that either supplement or replace the current monitoring program. Potentially useful studies could include assessments of the relationship between nutrient concentrations and aquatic growth through the examination of algal populations in the watershed, or investigations of nutrient concentrations in groundwater to determine if and how groundwater affect nutrients concentrations in dry weather surface flows. As the current program was designed to supplement permit-required monitoring within the watershed to assess problem areas, continuing the current program or any supplemental or substitute program(s) is dependent on available County and City resources, which vary from year to year. The City and the County will continue to annually assess the goals of the San Luis Rey joint monitoring program and recommend changes where appropriate.

Reference

Regional Water Quality Control Board. 1994. Water Quality Control Plan for the San Diego Basin (9). http://www.waterboards.ca.gov/sandiego/water_issues/programs/basin_plan/index.shtml

SLR-001 San Luis Rey Watershed Water Quality Monitoring Program Attachment D Page 14 of14

ATTACHMENT E TO SLR-001

SAN LUIS REY WATERSHED WATER QUALITY MONITORING PROGRAM ACTIVITY 2009-10 SLR WURMP Annual Report

Monitoring Results for FY 2009-10

THIS PAGE INTENTIONALLY LEFT BLANK Bicarbonate Crbonate Hydroxide Total Date Discharge pH Cond Turb. DO Temp NO3-N NO2-N NH4 TKN Org. N TN PO4-P P tot Hard. TC FC EN TDS TSS Mg K Na Ca Mn Fe tot Cl- SO4 B tot Fl Alkalinity Alkalinity Alkalinity Alkalinity

Location cfs Units mS/cm NTU mg/L oC mg/L mg/L mg/L mgL mgL mg/L mg/L mg/L mg/LMPN/100 mL mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 7/14/09 3.32 7.8 2.53 10 6.48 21.2 0.62 NM 0.85 NM NM NM 1.11 NM 690 14000 36 110 1720 10 74 7.2 230 150 NM NM 388 406 NM NM NM NM NM NM 8/10/09 0.54 7.59 2.65 7 5.58 19.4 NM NM NM NM NM NM NM NM NM 3000 98 70 1802 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 10/27/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 11/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 12/17/09 31.69 7.55 2.5 <1 8.12 10.3 NM NM NM NM NM NM NM NM NM 2200 373 300 1700 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 1/26/10 131.67 7.64 1.75 19 7.74 11.4 2.06 <0.05 0.1 2.1 2.0 4.2 0.3 0.94 554 5000 548 130 1050 8.4 62.4 9.31 156 119 NM NM 220 331 NM NM 205 NM NM 205 2/17/10 161.00 7.88 2.28 3 9.68 13.4 NM NM NM NM NM NM NM NM NM 2300 816 350 1550 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 67.40 7.75 2.28 5 9.64 12.7 NM NM NM NM NM NM NM NM NM 1700 236 300 1550 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 18.63 7.79 2.49 12 7.98 16.0 1.85 <0.05 <0.02 0.8 0.8 2.7 0.22 0.23 433.4 23000 37 170 1740 12 96.4 6.65 237 169 NM NM 372 469 NM NM 330 NM NM 330 6/8/10 5.41 7.62 2.57 15 6.71 18.5 NM NM NM NM NM NM NM NM NM 13000 69 170 1748 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 6.65 7.63 2.02 8 7.04 19.0 0.2 NM 0.4 NM NM NM 0.42 NM 560 3000 79 500 1260 7.8 62 5.5 190 120 NM NM 262 394 NM NM NM NM NM 240 8/10/09 1.33 7.49 1.86 7 7.19 19.7 NM NM NM NM NM NM NM NM NM 1700 52 80 1265 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 5.91 7.62 1.79 12 7.28 19.0 NM NM NM NM NM NM NM NM NM 1300 340 300 1217 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 NM NM NM NM NM NM 0.33 <0.05 0.16 0.7 0.5 1.1 <0.05 0.28 509 500 199 170 1040 7.2 55.2 5.28 158 113 NM NM 234 314 NM NM NM NM NM 210 11/17/09 14.00 7.63 1.79 7 8.34 12.1 NM NM NM NM NM NM NM NM NM 300 360 130 1217 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 35.10 7.75 2.38 5 8.42 11.8 NM NM NM NM NM NM NM NM NM 2300 272 170 1618 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

Bonsall1/26/10 98.64 Benet 7.62 2.01 19 8.5 11.0 4.55 0.05 <0.02 1.4 1.4 6.0 0.19 0.51 689 8000 461 220 1260 14 79.5 9.38 182 145 NM NM 250 413 NM NM 225 NM NM 225 2/17/10 45.90 7.59 2.21 5 9 12.1 NM NM NM NM NM NM NM NM NM 800 114 21 1503 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 55.58 7.68 2.18 5 8.9 11.6 NM NM NM NM NM NM NM NM NM 5000 60 130 1482 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 19.80 7.59 2.39 6 7.72 15.6 1.35 <0.05 0.1 0.7 0.6 2.1 0.16 0.3 846 1700 71 80 1730 7.2 103 6.17 219 169 NM NM 322 506 NM NM 300 NM NM 300 6/8/10 10.62 7.47 2.47 9 7.67 17.6 NM NM NM NM NM NM NM NM NM 3000 96 170 1680 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 1.89 7.9 2.4 9 9.47 22.1 0.49 NM 0.46 NM NM NM 0.6 NM 700 7000 613 1300 1720 15 80 6.6 230 150 NM NM 350 408 NM NM NM NM NM 330 8/10/09 0.12 7.22 2.25 1 1.86 18.0 NM NM NM NM NM NM NM NM NM 700 140 40 1530 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 0.11 7.14 2.3 2 0.98 17.4 NM NM NM NM NM NM NM NM NM 2300 320 220 1564 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 NM NM NM NM NM NM <0.05 <0.05 0.17 1 0.8 1.1 0.32 0.32 645 8000 900 80 1310 2 71.7 6.48 193 140 NM NM 312 318 NM NM NM NM NM 332 11/17/09 0.03 7.34 1.36 1 3.4 15.4 NM NM NM NM NM NM NM NM NM 170 180 20 925 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 31.62 7.78 2.44 2 8.4 11.0 NM NM NM NM NM NM NM NM NM 3000 414 130 1659 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

Douglas 1/26/10 229.50 7.74 1.85 24 8.6 11.5 3.37 <0.05 <0.02 <0.5 0.2 3.6 0.22 0.79 610 13000 548 170 1100 11 68.7 9.11 163 131 NM NM 231 357 NM NM 220 NM NM 220 2/17/10 60.60 7.87 2.25 7 9.61 12.8 NM NM NM NM NM NM NM NM NM 3000 129 50 1530 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 50.25 7.9 2.23 5 9.21 12.0 NM NM NM NM NM NM NM NM NM 2200 114 30 1516 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 17.00 7.89 2.45 14 9.02 15.8 3.45 <0.05 <0.02 0.6 0.6 4.1 0.41 0.43 840 8000 91 300 1660 12 101 6.38 225 170 NM NM 350 485 NM NM 390 NM NM 320 6/8/10 2.27 7.71 2.5 31 8.07 18.5 NM NM NM NM NM NM NM NM NM 28000 260 500 1700 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 1.58 7.89 2.49 2 8.02 20.2 2.52 NM 0.34 NM NM NM 0.3 NM 730 23000 1120 700 1700 4.2 84 7 230 150 NM NM 349 459 NM NM NM NM NM 300 8/10/09 0.23 7.4 2.43 <1 2.26 21.0 NM NM NM NM NM NM NM NM NM 300 10 <1 1652 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 0.01 7.38 2.31 16 3.06 21.5 NM NM NM NM NM NM NM NM NM 11000 1700 70 1571 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 NM NM NM NM NM NM 5.15 0.93 <0.02 0.7 0.7 6.8 0.09 0.31 802 5000 1760 500 1640 2.2 91 8.41 230 171 NM NM 397 484 NM NM NM NM NM 315 11/17/09 1.56 7.81 2.21 1 8.87 11.7 NM NM NM NM NM NM NM NM NM 1300 360 230 1503 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 31.20 7.88 2.45 22 9.06 12.0 NM NM NM NM NM NM NM NM NM 11000 556 130 1666 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 1/26/10 213.60 7.7 1.93 25 8.56 11.7 4.72 0.05 <0.02 1.4 1.4 6.2 0.62 0.68 646 13000 205 70 1170 20.4 73.2 9.12 174 138 NM NM 243 382 NM NM 220 NM NM 220 2/17/10 200.00 7.8 2.27 10 9.63 13.8 NM NM NM NM NM NM NM NM NM 1300 155 30 1544 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 167.25 7.73 2.25 12 8.41 13.6 NM NM NM NM NM NM NM NM NM 1700 141 80 1530 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 35.60 7.82 2.5 7 8.98 16.1 4.96 0.05 <0.02 0.5 0.5 5.5 0.31 0.31 867 8000 143 170 1700 5.2 105 6.23 227 174 NM NM 352 503 NM NM 378 310 6/8/10 0.60 7.57 2.51 8 6.7 18.8 NM NM NM NM NM NM NM NM NM 5000 272 350 1707 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 NA 7.76 35.3 <1 6.78 31.0 NM NM NM NM NM NM NM NM NM 300 203 170 24004 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 8/10/09 0.00 7.74 28 7 6.67 26.0 NM NM NM NM NM NM NM NM NM 2300 108 500 19040 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 0.00 8.16 21.5 17 6.99 24.1 NM NM NM NM NM NM NM NM NM 220 <2 80 14620 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 400 95 260 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 11/17/09 NA 7.9 13.79 2 8.63 13.4 NM NM NM NM NM NM NM NM NM 300 10 300 9377 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 NA 7.73 41.5 3 8.6 14.5 NM NM NM NM NM NM NM NM NM 800 31 130 28220 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

Pacific 1/26/10 NA 7.55 3.44 32 7.49 12.4 NM NM NM NM NM NM NM NM NM 2300 1376 1300 2339 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 2/17/10 NA 7.77 7.03 5 8.17 14.1 NM NM NM NM NM NM NM NM NM 1100 880 230 4780 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 NA 7.88 2.37 6 10.22 14.2 NM NM NM NM NM NM NM NM NM 900 75 170 1612 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 NA 7.92 7.5 11 11.54 12.4 NM NM NM NM NM NM NM NM NM 600 20 80 5100 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 6/8/10 NA 7.7 4.05 12 5.27 22.0 NM NM NM NM NM NM NM NM NM 5000 512 3000 2754 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 13 <2 13 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 8/10/09 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7 <2 2 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 23 10 23 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM <2 53 <10 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

Mix11/17/09 NA NM NM NM NM Murray NM NM NM NM NM NM NM NM NM NM <2 <2 <10 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

12/17/09 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 130 134 130 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

acific 1/26/10 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 1700 1076 300 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM P Bicarbonate Crbonate Hydroxide Total Date Discharge pH Cond Turb. DO Temp NO3-N NO2-N NH4 TKN Org. N TN PO4-P P tot Hard. TC FC EN TDS TSS Mg K Na Ca Mn Fe tot Cl- SO4 B tot Fl Alkalinity Alkalinity Alkalinity Alkalinity

Location cfs Units mS/cm NTU mg/L oC mg/L mg/L mg/L mgL mgL mg/L mg/L mg/L mg/LMPN/100 mL mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L P 2/17/10 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 350 211 50 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 1100 10 70 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 80 31 23 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 6/8/10 NA NM NM NM NM NM NM NM NM NM NM NM NM NM NM 30 <2 8 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 1.45 7.84 2.05 19 9.75 9.8 NM NM NM NM NM NM NM NM NM 8000 1850 800 1394 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 1/26/10 12.53 7.27 1.17 21 6.35 12.3 0.24 <0.05 <0.02 2.1 2.1 2.4 0.23 0.74 287 5000 387 140 580 7.6 33.8 7.83 136 59.2 NM NM 200 128 NM NM 131 NM NM 131 Creek

2/17/10 2.27 7.85 3.29 2 12.97 12.5 NM NM NM NM NM NM NM NM NM 2300 387 27 2237 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 1.41 7.63 3.62 3 8.51 11.7 NM NM NM NM NM NM NM NM NM 3000 276 500 2462 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 0.24 8.1 5.05 8 8.25 18.8 <0.05 <0.05 <0.02 0.8 0.8 0.9 0.29 0.32 941 5000 1553 1700 3120 7 140 8.28 754 146 NM NM 1130 573 NM NM 476 NM NM 400 Pilgrim 6/8/10 0.01 7.76 5.35 11 4.64 22.7 NM NM NM NM NM NM NM NM NM 13000 770 500 3638 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 0.03 7.98 4.41 7 7.93 22.5 NM NM <0.02 NM NM NM 0.35 NM 1300 80000 402 4 2980 8.8 170 5.5 430 220 NM NM 511 806 NM NM NM NM NM 340 8/10/09 <0.01 8.05 4.48 2 8.25 21.0 NM NM NM NM NM NM NM NM NM 110000 5670 40 3046 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/22/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 10/27/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 11/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Indian 12/17/09 0.02 8.23 4.68 8 10.36 11.4 NM NM NM NM NM NM NM NM NM 110000 1354 230 3182 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 1/26/10 0.11 8.1 4.44 26 10.39 11.3 98.5 0.37 <0.02 <0.5 0.2 99.1 0.18 0.79 1430 140000 1733 170 3000 16 196 6.04 464 249 NM NM 556 914 NM NM 400 NM <1 400 2/17/10 0.07 8.21 4.28 9 11.52 12.1 NM NM NM NM NM NM NM NM NM 23000 980 300 2910 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 0.11 8.16 4.07 5 11.07 10.7 NM NM NM NM NM NM NM NM NM 23000 1414 500 2768 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 0.01 8.21 4.2 1 9.57 16.8 111 0.22 <0.02 <0.5 0.2 111.5 0.3 0.53 1420 23000 2420 80 2920 1 207 6.97 456 226 NM NM 526 788 NM NM 456 NM NM 400 6/8/10 <0.01 8.09 4.14 7 8.22 19.9 NM NM NM NM NM NM NM NM NM 30000 12997 3000 2815 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 1.29 7.7 2.59 7 10.08 23.1 1.7 0.03 0.04 0.87 0.8 2.6 0.33 0.35 800 9000 130 500 1680 12.6 105 8.32 250 171 105 0.51 386 509 0.39 291 <1 <1 291 8/10/09 0.29 7.76 2.69 5 12.87 23.1 0.36 0.02 0.06 0.64 0.6 1.0 0.34 0.36 NM 1700 130 300 1829 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/28/09 0.09 7.51 2.44 16 5.76 22.0 0.08 <0.007 0.19 0.81 0.6 0.9 0.4472 0.586 NM NM NM NM 1659 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 0.17 7.39 2.68 8 10.84 0.06 <0.007 0.3 0.736 0.4 0.8 0.3191 0.449 701.2 9000 1100 173 1728 3.5 88.78 5.7 268.3 134.4 88.78 977 409.12 478.59 333.8 305 <1 <1 11/17/09 0.40 7.44 2.58 2 7.58 16.6 0.4 <0.007 0.27 0.85 0.6 1.3 0.238 0.355 NM 16000 80 52 1754 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 5.08 7.88 2.5 10 9.8 13.2 2.97 0.07 0.12 0.464 0.3 3.5 0.338 0.339 NM 1700 220 96 1700 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM SLR01 1/26/10 37.92 7.92 2.1 28 8.06 12.8 3.76 0.06 0.13 1.2 1.1 5.0 0.29 0.8 884 9000 130 90 1370 30 78.7 11.6 225 136 78.7 2.4 280 468 <0.25 NM 250 <1 <1 250 2/17/10 15.54 8.15 2.13 10 15.08 16.3 3.17 <0.05 0.11 1.4 1.3 4.6 0.42 0.44 NM 1600 50 127 1448 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 16.02 8.17 2.52 10 9.82 17.2 3.67 <0.05 <0.02 1.5 1.5 5.2 1.3 0.27 NM 3000 23 17 1714 <1 NM NM NM NM NM NM NM NM NM NM NM <1 NM NM 5/18/10 2.91 8.39 2.47 9 13.05 21.5 3.51 0.03 0.07 1.1 1.0 4.6 0.38 0.41 782 5000 130 30 1540 9.8 87.6 5.15 245 144 87.6 0.399 350 441 <0.25 0.329 230 <1 <1 230 6/8/10 2.03 8.47 2.45 5 14.66 22.8 3.25 0.06 0.13 0.8 0.7 4.1 0.26 0.27 NM 3000 500 34 1666 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 8/10/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 9/28/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 10/27/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 11/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 12/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry SLR021/26/10 3.07 7.88 2.42 22 9.71 Sleeping 11.4 7.05 0.07 <0.02 1.6 1.6 8.7 0.16 0.4 1070 9000 230 170 1560 20 97 7.76 276 139 97 1.11 340 403 <0.25 NM 230 <1 <1 230 2/17/10 1.98 7.84 2.51 10 10.91 13.6 4.65 0.05 <0.02 1.8 1.8 6.5 0.07 0.17 NM 1600 50 387 1707 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/15/10 1.72 8.16 2.49 8 10.37 13.2 4.79 0.05 <0.02 1.5 1.5 6.3 0.61 0.13 NM 5000 500 130 1693 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 0.58 7.96 2.74 1 10.68 16.0 5.32 0.06 0.04 <0.5 0.2 5.6 0.1 0.11 901 1300 500 500 1650 <1 112 3.43 273 154 112 0.053 420 412 <0.25 0.401 340 <1 <1 340 6/8/10 0.17 7.8 2.65 0 7.44 18.3 6.32 <0.05 0.1 0.5 0.4 6.8 0.07 0.29 NM 5000 130 500 1802 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/15/09 0.26 8.05 2.14 4 7.67 19.8 3.8 0.03 0.04 0.84 0.8 4.7 0.2 0.23 780 500 40 40 1380 0.6 100 4.25 146 165 100 0.08 293 477 NM 0.4 299 <1 <1 299 8/10/09 0.18 7.96 2.1 0 8.67 19.5 3.84 0.03 0.04 1.04 1.0 4.9 0.19 0.18 NM 220 70 80 1428 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/28/09 0.25 8.04 2.23 2 9.04 20.3 3.87 <0.05 0.03 <0.5 0.2 4.1 0.2125 0.23 NM NM NM NM 1516 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 0.49 7.69 2.22 1 10.52 6.15 <0.05 <0.02 <0.5 0.2 6.4 0.2795 0.314 726.3 1300 800 96 1572 0.7 92.39 0.5 155.4 138.5 92.39 734 274.28 463.21 185.2 NM 275 16 <1 NM 11/17/09 0.53 7.84 1.82 5 10.1 11.0 6.38 <0.05 0.03 0.46 0.4 6.9 0.344 0.406 NM 800 80 20 1238 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 1.94 7.9 2.25 2 9.22 12.2 5.65 0.08 0.08 0.802 0.7 6.5 0.271 0.236 NM 1300 110 74 1530 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM SLR14 1/26/10 4.70 7.91 2.03 6 7.89 13.1 5.36 0.05 0.11 0.8 0.7 6.2 0.42 0.68 982 9000 130 170 1280 <1 91.4 6.67 163 150 91.4 0.315 240 408 <0.25 NM 270 <1 <1 270 2/18/10 3.29 7.9 2.1 2 10.1 14.2 7.2 <0.05 <0.02 <0.5 0.2 7.5 0.48 NM NM NM NM 80 1428 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/17/10 2.46 8.11 2.49 0 9.89 13.3 6.48 <0.05 <0.02 1.3 1.3 7.8 0.39 0.38 NM 1700 130 110 1693 1.5 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/19/10 1.37 8.01 2.15 0 8.38 16.8 4.98 <0.05 <0.02 <0.5 0.2 5.3 0.14 0.15 757 1300 80 30 1320 1.1 96.8 3.26 162 151 96.8 <0.05 270 NM <0.25 0.345 270 <1 <1 270 6/8/10 0.73 8.05 2.13 2 8.66 19.6 5.95 <0.05 0.11 <0.5 0.1 6.2 0.31 0.44 NM 800 23 30 1448 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 7.49 7.6 1.97 26 10.03 19.4 0.27 0.01 0.05 0.42 0.4 0.7 0.1 0.1 620 140 140 170 1260 4.7 74.7 8.14 174 150 74.7 0.59 268 400 NM 0.56 232 <1 <1 232 8/10/09 6.53 7.63 1.94 8 7.8 20.4 0.23 0.01 0.05 0.48 0.4 0.7 0.09 0.1 NM 300 40 40 1319 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/28/09 8.12 7.63 1.73 15 7.28 19.5 0.24 <0.05 0.03 <0.5 0.2 0.5 0.0594 0.108 NM NM NM NM 1176 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 11.52 7.39 1.75 16 10.23 0.29 <0.05 0.04 <0.5 0.2 0.6 0.0462 0.084 464.6 700 230 97 1096 5.3 54.09 5.1 153.2 96.86 54.09 884 229.87 326.12 212.4 NM 203 <1 <1 NM 11/17/09 11.83 7.36 1.75 4 9.57 12.6 0.25 <0.05 0.03 <0.5 0.2 0.5 0.046 0.074 NM 500 300 135 1190 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 19.60 7.67 2.41 4 8.83 12.2 0.84 <0.05 0.05 0.462 0.4 1.3 0.107 0.154 NM 1700 300 85 1639 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM SLR16 1/26/10 163.80 7.8 1.99 18 8.02 11.0 3.35 <0.05 0.13 2.2 2.1 5.6 0.18 1.16 974 16000 300 80 1320 <1 77.4 10.4 186 147 77.4 0.914 260 482 <0.25 NM 200 <1 <1 200 2/17/10 104.80 7.48 2.2 24 10.38 12.9 2.71 <0.05 <0.02 1.4 1.4 4.1 0.18 0.23 NM 900 130 55 1496 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM Bicarbonate Crbonate Hydroxide Total Date Discharge pH Cond Turb. DO Temp NO3-N NO2-N NH4 TKN Org. N TN PO4-P P tot Hard. TC FC EN TDS TSS Mg K Na Ca Mn Fe tot Cl- SO4 B tot Fl Alkalinity Alkalinity Alkalinity Alkalinity

Location cfs Units mS/cm NTU mg/L oC mg/L mg/L mg/L mgL mgL mg/L mg/L mg/L mg/LMPN/100 mL mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 3/15/10 83.05 7.84 2.33 9 9.64 12.7 3.85 <0.05 <0.02 0.8 0.8 4.7 0.7 0.13 NM 9000 170 230 1584 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 18.72 7.46 2.37 9 9.09 16.0 1.07 <0.05 0.15 0.8 0.7 1.9 0.14 0.15 803 1700 50 140 1490 5.8 94.8 6.47 219 167 94.8 0.363 350 491 <0.25 0.355 270 <1 <1 270 6/8/10 13.44 7.61 2.48 12 7.43 17.8 0.67 <0.05 0.1 <0.5 0.2 0.9 0.31 0.33 NM 2300 170 230 1686 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/15/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 8/10/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 9/28/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 10/27/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 11/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 12/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 1/26/10 19.56 8.01 2.49 41 8.3 12.6 9.09 0.05 <0.02 3 3.0 12.1 0.11 0.7 1240 16000 300 210 1740 47 108 7.49 241 188 108 0.453 330 592 <0.25 230 <1 <1 230 2/18/10 10.50 7.94 2.6 19 10.12 17.7 8.52 <0.05 <0.02 <0.5 0.2 8.8 0.19 NM NM NM NM 86 1768 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/17/10 10.05 8.17 2.6 8 9.82 19.0 7.28 <0.05 0.12 1 0.9 8.3 0.11 0.12 NM 800 170 50 1768 13.8 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/19/10 0.33 8.26 3.33 3 9.28 29.5 5.24 <0.05 <0.02 <0.5 0.2 5.5 0.29 0.31 1150 1700 500 500 2210 5 141 4.43 308 227 141 <0.05 470 <0.25 0.341 210 <1 <1 210 6/9/10 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 7/14/09 1.18 7.66 1.65 12 10.65 21.1 0.23 0.01 0.04 0.84 0.8 1.1 0.12 0.16 500 300 300 170 1010 7.4 53.9 6.83 128 115 53.9 0.81 208 344 0.59 194 <1 <1 194 8/10/09 2.70 7.61 1.53 9 7.18 21.4 0.27 0.04 0.04 0.62 0.6 0.9 0.1 0.11 NM 220 110 140 1040 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/28/09 5.51 7.78 1.61 6 7.07 21.0 0.34 0.06 0.04 0.844 0.8 1.2 0.0442 0.086 NM NM NM NM 1095 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 3.93 7.53 1.43 6 9.46 0.31 0.05 0.07 <0.5 0.2 0.6 0.0297 0.076 364.7 500 500 213 858 4.8 41.32 <5 120.3 77.92 41.32 749 183.85 262.23 193.5 157 <1 <1 NM 11/17/09 4.68 7.56 1.53 6 8.69 14.0 0.29 <0.05 0.03 <0.5 0.2 0.6 0.039 0.083 NM 700 300 275 1040 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 5.92 7.72 2.29 3 8.23 11.5 0.99 0.05 0.09 0.904 0.8 1.9 0.09 0.116 NM 300 80 86 1557 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM SLR251/26/10 115.20 SLR17 7.84 2.09 13 8.03 11.2 4.13 <0.05 0.14 1.5 1.4 5.7 0.06 0.58 1000 1100 230 80 1460 <1 82.4 10.2 186 159 82.4 0.401 250 410 <0.25 NM 240 <1 <1 240 2/17/10 57.15 7.81 2.06 20 12.15 14.3 3.03 <0.05 0.1 0.5 0.4 3.6 0.3 0.32 NM 900 240 77 1401 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/17/10 43.43 7.8 2.29 4 8.64 12.7 2.72 <0.05 0.1 1.1 1.0 3.8 0.14 0.14 NM 1100 230 500 1557 5.5 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 11.88 7.96 2.36 4 8.89 15.6 1.08 <0.05 <0.02 0.5 0.5 1.6 0.11 0.12 863 1300 70 110 1520 4.9 90.9 6.74 198 164 90.9 0.399 320 502 <0.25 0.316 280 <1 <1 280 6/8/10 4.32 8 2.29 16 7.45 17.4 0.59 <0.05 <0.02 0.6 0.6 1.2 0.12 0.15 NM 2300 50 130 1557 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/14/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 8/10/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 9/28/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 10/27/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 11/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 12/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry SLR26 1/26/10 0.27 7.76 2.4 1 8.49 11.4 0.77 <0.05 0.21 0.8 0.6 1.6 0.11 0.79 1230 2400 40 90 1630 <1 107 8.78 229 187 107 <0.05 270 664 <0.25 NM 250 <1 <1 250 2/17/10 0.27 7.9 2.06 1 16.13 16.1 0.14 <0.05 <0.02 1.8 1.8 2.0 0.06 0.22 NM 1600 300 172 1401 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/17/10 0.35 7.88 2.21 1 10.62 13.3 <0.05 <0.05 0.14 1.7 1.6 1.8 0.15 0.16 NM 3000 300 130 1503 1.7 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/18/10 0.01 7.96 2.57 1 8.5 21.0 0.8 <0.05 <0.02 <0.5 0.2 1.1 0.11 0.2 843 160000 21 1100 1600 3.3 101 2.56 235 160 101 0.154 330 424 <0.25 0.48 380 <1 <1 380 6/8/10 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 7/15/09 0.16 8.14 2.33 16 9.16 18.6 4.95 0.01 0.04 0.7 0.7 5.7 0.17 0.17 740 9000 1100 1700 1570 2.9 105 2.27 165 178 105 0.38 305 526 0.45 288 2 <1 290 8/10/09 0.21 7.98 2.37 18 8.81 18.5 4.91 0.01 0.05 0.59 0.5 5.5 0.19 0.17 NM 5000 5000 5000 1612 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 9/28/09 0.07 8.13 2.24 10 9.12 19.1 4.21 <0.05 0.03 0.492 0.5 4.7 0.1538 0.179 NM NM NM NM 1523 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 10/27/09 0.10 7.89 2.39 1 10.75 NM 4.48 <0.05 <0.02 <0.5 0.2 4.8 0.1274 0.154 777.5 5000 1300 135 1630 1.7 98.65 <5 182.7 148.7 98.65 815 294.47 516.63 193.1 NM 264 28 <1 NM 11/17/09 0.10 8.02 2.37 15 11.54 10.1 5.08 <0.05 0.03 0.528 0.5 5.6 0.123 0.148 NM 3000 300 520 1612 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 12/17/09 1.74 7.95 2.4 3 9.59 12.9 5.06 0.07 0.06 0.694 0.6 5.8 0.173 0.177 NM 11000 500 243 1632 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM

SLR27 1/26/10 5.12 7.94 2.31 11 9.43 12.7 7.38 <0.05 0.1 1.3 1.2 8.7 0.11 0.86 1300 2800 130 300 1560 <1 112 3.89 189 169 112 0.386 270 481 <0.25 230 <1 <1 230 2/18/10 4.32 7.89 2.2 10 9.87 13.9 8.28 <0.05 <0.02 0.5 0.5 8.8 0.15 NM NM NM NM 80 1496 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/17/10 3.24 8.06 2.46 5 9.69 13.8 7.52 <0.05 0.1 0.8 0.7 8.3 0.14 0.19 NM 1300 500 50 1673 6 NMNMNMNMNMNMNMNMNMNMNMNMNMNM 5/19/10 1.60 8.09 2.28 3 8.74 17.7 5.2 <0.05 <0.02 0.7 0.7 5.9 0.09 0.12 908 2300 300 50 1550 5.1 112 1.56 201 175 112 0.152 310 <0.25 0.351 230 <1 <1 230 6/9/10 0.80 8.01 2.44 4 8.86 18.5 6.45 <0.05 <0.02 0.8 0.8 7.3 0.25 0.36 NM 2300 500 130 1659 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 7/15/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 8/10/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 9/28/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 10/27/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 11/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry 12/17/09 Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry Dry SLR28 1/26/10 47.70 7.68 1.53 17 6.72 13.4 8.72 0.07 <0.02 0.5 0.5 9.3 0.14 0.59 674 5000 40 20 1000 <1 58.2 14.3 137 120 58.2 0.749 150 328 <0.25 150 <1 <1 150 2/18/10 24.95 7.95 1.64 5 13.97 16.2 10.2 0.07 <0.02 <0.5 0.2 10.5 0.13 NM NM 900 120 50 1115 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM 3/17/10 27.90 8.05 1.65 5 12.01 16.8 8.78 0.07 <0.02 0.7 0.7 9.6 0.14 0.13 NM 1300 130 50 1122 15.2 NM NM NM NM NM NM NM NM NM NM NM NM NM NM 5/19/10 1.26 8.18 1.93 0 10.36 20.8 7.1 <0.05 <0.02 <0.5 0.2 7.4 <0.007 <0.02 647 2800 170 9 1180 1.6 70.2 13.4 154 131 70.2 <0.05 210 NM <0.25 0.282 230 <1 <1 230 6/9/10 0.38 8.03 1.94 0 11.05 21.0 9.02 <0.05 <0.02 <0.5 0.2 9.3 0.12 0.14 NM 3500 500 130 1319 <1 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM ‐ Not Measured Bicarbonate Crbonate Hydroxide Total Date Discharge pH Cond Turb. DO Temp NO3-N NO2-N NH4 TKN Org. N TN PO4-P P tot Hard. TC FC EN TDS TSS Mg K Na Ca Mn Fe tot Cl- SO4 B tot Fl Alkalinity Alkalinity Alkalinity Alkalinity

Location cfs Units mS/cm NTU mg/L oC mg/L mg/L mg/L mgL mgL mg/L mg/L mg/L mg/LMPN/100 mL mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L ND ‐ Not Detected FY 2009-10 Activity Implementation Summary Sheet SLR-003

WATERSHED ACTIVITY IMPLEMENTATION SUMMARY SHEET Watershed Water Quality Activity

TITLE: Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall – Modular Wetland ID NUMBER: SLR-003

ACTIVITY IMPLEMENTATION Oceanside Harbor has over 40 storm drains with small drainage areas that carry flow to the harbor. One drain with historic bacterial exceedances receives flow from the harbor boat wash. Located within 15 feet of the drain are two wastewater discharge hook-ups for recreational vehicles (RV). This activity, SLR-003, addresses structural BMP implementation at the boat wash drain.

ACTIVITY IMPLEMENTATION FYs 2006-07 and 2007-08 Two bacteria reduction pilot projects have been implemented in the past: installation of an antimicrobial fabric in FY 2006/07 and increased frequency of storm drain cleaning in FY 2007- 08. The antimicrobial fabric did not display long-term effectiveness, possibly the result of added hydrocarbons and sediment in the runoff. The City then implemented monthly cleaning of the storm drain outfall in May 2007 which showed reductions in bacterial counts, though there were still some bacterial level exceedances which may be due to re-growth in the pipe.

On April 1, 2008, BioClean Environmental Services, Inc. began installation of a Linear Modular Wetland System at the Harbor Boat Wash storm drain. This system utilizes a combination of technologies to not only address the high priority pollutant of bacteria, but also to capture trash, and filter out hydrocarbons and other potential pollutants. The installation was the first field test for the new technology. The wetland consists of a vault 22 feet long, five feet wide, and five feet deep. The peak treatment volume is 4000 cubic feet per second with a bypass for higher flows.

To address bacteria, the Modular Wetland is utilizing BioMediaGreen, a new type of media in lightweight block format that is easy to handle and replace, for primary filtration. The wetland is then using a sub-surface flow wetland for biological remediation. Because the harbor is a harsh, salt-water environment, the system is using a hardy, fast growing plant with large root bundles, called Vetiver grass. It was estimated that it take about six months for the plants to get established in the wetland and the roots to get to the bottom of the vault, and therefore, peak treatment to begin.

ACTIVITY IMPLEMENTATION FY 2008-09 After the installation of the wetland, the separator vault was filled to remove the possibility of growth/regrowth between the wetland and the outfall. For six months (July 2008 – January 2009), the City conducted paired sampling of the wetland outfall and the storm drain outfall and found that there was no evidence of regrowth in the pipe. Monitoring of this outfall pipe continued during FY 2008-09 and has been ongoing since 2004 and will continue through the Coastal Storm Drain Monitoring (CSDM) Program for total coliforms, fecal coliforms, and Enterococcus. Not quantified, but pollutants also being addressed by this BMP are oil and grease and trash.

SLR-003 Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall – Modular Wetland Page 1 of 2

FY 2009-10 Activity Implementation Summary Sheet SLR-003

ACTIVITY IMPLEMENTATION FY 2009-10 During FY 2009-10, bacteria monitoring continued through the Coastal Storm Drain Monitoring program. BioClean Environmental Services, Inc continued to service the wetland.

TMDL APPLICABILITY N/A

TIME SCHEDULE FOR IMPLEMENTATION The Modular Wetland was installed at the beginning of April 2008. The peak treatment efficiencies were expected to be reached by October 2008 and were dependent on plant growth and media maturity.

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside

OTHER PARTICIPATING ENTITIES • BioClean Environmental Services, Inc.

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The source of the bacteria has been clearly characterized. The City is moving forward with implementing pilot programs to determine the BMP, or combination of BMPs, that will be most effective in reducing bacterial exceedances from this outfall.

EFFECTIVENESS ASSESSMENT The Modular Wetland was installed in FY 2007-08 and peak treatment efficiencies were expected in FY 2008-09. A six month regrowth study between the wetland and the outfall pipe was also conducted in FY 2008-09. Outfall monitoring continued this fiscal year through the CSDM program. A comprehensive report of the current and historical data, regrowth study, and bacteria trends are provided in Attachment A.

FY 2008/09 provided the least number of exceedance days since monitoring began. The current fiscal year had less monitoring days, 15 as opposed to18 in the previous year, and exceedance days (according to CSDM action levels) were about the same. Enterococcus action levels were not exceeded this fiscal year, and total and fecal coliform levels exceeded one additional day from the previous year. The modular wetland may be having a positive affect on Enterococcus and fecal coliform levels, but total coliform levels remain the same. Although exceedances at the outfall do still occur, flow rates are usually less than one gallon/minute (gpm) and receiving water exceedances rarely occur (two total coliform and fecal coliform exceedance of AB411 single-sample standards throughout FY 2009/10).

These reductions show a change in Level 5 Effective Assessment Outcomes, changes in urban runoff and discharge quality. Assessment will continue through the next fiscal year.

SLR-003 Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall – Modular Wetland Page 2 of 2

ATTACHMENT A TO SLR-003

Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall 2009-10 SLR WURMP Annual Report

Results Summary

THIS PAGE INTENTIONALLY LEFT BLANK FY 2009-10 Activity Implementation Sheet SLR-001

Introduction The City of Oceanside’s Clean Water Program has been monitoring the Oceanside Harbor boat wash outfall, located adjacent to the boat ramp, since 2004 as part of the Coastal Storm Drain Monitoring (CSDM) Program. This outfall drains the boat wash-down area, which includes four fresh water spigots, and two sewage dump stations for recreational vehicles, and is located approximately 150 feet upstream of the outfall. Exceedances of CSDM action levels for total and fecal coliforms have been occurring at the outfall since monitoring began. However, exceedances of REC-1 receiving water standards have rarely occurred at this site. Average flow rates from the outfall are 1gpm or less.

Several BMPs have been attempted to reduce bacteria levels and exceedances at the outfall. Until late 2008, this drainage line did have a separator vault to separate debris, sediment, and hydrocarbons from entering the harbor. It is suspected that while this did assist in sediment and debris separation, the vault may have allowed bacteria growth and/or regrowth which would result in bacteria action level exceedances. Other BMPs included installation of anti-microbial fabric in the vault, increased cleaning frequency of the storm drain line, and additional signage for RV users.

On April 1, 2008, BioClean Environmental Services, Inc. began installation of a Linear Modular Wetland System at the Harbor boat wash storm drain inlet. This system utilizes a combination of technologies to not only address bacteria, but also to capture trash, and filter out hydrocarbons and other potential pollutants. The installation was the first field test for the new technology. It was agreed that the City would continue to sample the outfall for bacteria, under the CSDM program guidelines, and BioClean would complete the product effectiveness testing.

Results Table 1 provides the indicator bacteria results from the outfall (also known as Coast 08 under the CSDM program). Bacteria samples were processed by Weston Solutions, Inc. or the City of Oceanside’s San Luis Rey Wastewater Treatment Plant Laboratory using the multiple tube fermentation (MTF) method. Results in red and bold indicate an exceedance of the CSDM action levels which are presented in Table 2.

After the installation of the wetland, the separator vault was filled in to remove the possibility of growth/regrowth between the wetland and the outfall. For six months, the City conducted paired sampling of the wetland outfall and the storm drain outfall and found that there was no evidence of regrowth in the pipe. These results are presented in Table 3.

SLR-003 Bacteria Reduction Pilot Program at Oceanside Harbor Boat Wash Outfall – Modular Wetland Attachment A Page 1 of 6 FY 2009-10 Activity Implementation Sheet SLR-001

Table 1. Oceanside Harbor Boat Wash Outfall Monitoring Results from June 2004 through June 2010. Enterococcus Fecal Coliforms Total Coliforms Date (MPN/100ml) (MPN/100ml) (MPN/100ml) 6/22/2004 11800 6500 160000 6/30/2004 1730 80000 1600000 7/13/2004 726 24000 160000 8/11/2004 23500 160000 160000 9/7/2004 8660 800 9000 11/16/2004 1400 1600000 1600000 12/14/2004 17100 20 500 1/18/2005 460 5000 130000 2/8/2005 2250 500 900000 3/8/2005 3730 8000 1600000 4/12/2005 5 400 8000 4/19/2005 580 1100 300000 4/26/2005 130 3000 900000 5/3/2005 8220 300 80000 5/10/2005 2340 3000 110000 5/24/2005 210 30000 50000 6/7/2005 210 50000 130000 6/21/2005 290 7000 300000 6/21/2005 6520 50000 1600000 7/19/2005 210 5000 500000 8/2/2005 590 130000 220000 8/16/2005 340 8000 130000 8/30/2005 270 5000 50000 9/13/2005 240 17000 140000 9/27/2005 51 80000 80000 10/11/2005 75 17000 50000 10/25/2005 1000 5000 170000 11/8/2005 3140 1300 23000 1/17/2006 98040 13000 900000 2/14/2006 150 300 5000 3/27/2006 5 1300 130000 4/10/2006 230 10000 400000 4/10/2006 230 10000 400000 5/1/2006 120 230 1600000 5/30/2006 20 1600 160000 6/12/2006 360 20000 420000 6/26/2006 430 900000 1600000 7/10/2006 2970 30000 500000 7/24/2006 54800 80000 1600000 8/7/2006 1750 30000 900000 8/21/2006 990 500 23000 9/5/2006 1400 2800 500000 9/18/2006 50000 160000 1600000 9/18/2006 11000 160000 900000 11/20/2006 580 3000 50000

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Enterococcus Fecal Coliforms Total Coliforms Date (MPN/100ml) (MPN/100ml) (MPN/100ml) 12/20/2006 2190 2800 110000 2/26/2007 107 110 11000 3/20/2007 5 1700 110000 5/7/2007 120 1400 80000 5/21/2007 5 40 23000 6/11/2007 100 3000 130000 6/25/2007 1782 50000 900000 7/3/2007 296 1100 240000 7/17/2007 150 13000 80000 7/30/2007 569 1300000 1600000 8/13/2007 760 800 130000 8/27/2007 130 5000 13000 9/24/2007 190 23000 30000 10/17/2007 4,050 500,000 900,000 10/29/2007 210 1,100 1,600,000 11/13/2007 1,935 23,000 1,600,000 12/18/2007 368 70,000 300,000 1/17/2008 24,196 30,000 1,600,000 1/31/2008 30 1,100 900,000 2/28/2008 213 13,000 1,600,000 4/1/2008 – Modular Wetland Installed 4/14/2008 5 300 50,000 5/12/2008 24,196 600 140,000 6/2/2008 14,136 110,000 170,000 6/10/2008 5 20 40 7/7/2008 622 5,000 1,600,000 7/15/2008 41 2,200 17,000 7/21/2008 95 3,000 17,000 8/4/2008 63 1,700 110,000 9/2/2008 670 17,000 300,000 9/11/2008 2,062 2,800 13,000 10/7/2008 1,989 17,000 80,000 11/10/2008 15,531 170,000 1,600,000 11/18/2008 7,270 30,000 1,600,000 12/8/2008 250 1,300 30,000 1/12/2009 85 700 900,000 1/21/2009 73 13,000 220,000 2/1/2009 - BioMediaGREEN +AM (Anti-Microbial) Filter Installed in the Discharge Chamber of the Wetland 2/4/2009 52 300 500,000 2/13/2009 134 20 11,000 3/3/2009 1,850 1,400 17,000 4/6/2009 226 1,100 130,000 5/14/2009 471 5,000 50,000 6/1/2009 24,800 80,000 1,600,000 6/9/2009 – Wetland maintenance. Replaced all media components in the wetland chamber.

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Enterococcus Fecal Coliforms Total Coliforms Date (MPN/100ml) (MPN/100ml) (MPN/100ml) 8/17/2009 790 3,500 70,000 9/8/2009 3,100 17,000 170,000 9/15/2009 610 30,000 300,000 10/21/2009 16,000 1,600,000 >1,600,000 10/27/2009 3,330 23,000 80,000 11/3/2009 170 2,200 80,000 11/9/09 200 1,300 22,000 12/2/09 3,310 2,800 350,000 12/17/09 7,270 230 220,000 1/11/2010 420 1,100 900,000 2/15/10 10,700 900,000 900,000 2/24/10 1,700 80 28,000 4/15/10 145 2,200 110,000 6/9/10 8,800 3,000 500,000 6/14/10 1,090 11,000 500,000

Table 2. CSDM Action Levels. Total Coliform 160,000 MPN/100ml Fecal Coliform 18,755 MPN/100ml Enterococcus 17,820 MPN/100ml

Table 3. Test for Regrowth between Wetland Outfall and Storm Drain Outfall. Location of Sample Date (WO = Wetland Outfall, OF = Storm Enterococcus Fecal Coliforms Total Coliforms Drain Outfall) (MPN/100ml) (MPN/100ml) (MPN/100ml) WO 332 17,000 1,600,000 7/7/2008 OF 622 5,000 1,600,000 WO 20 2,300 110,000 8/4/2008 OF 63 1,700 110,000 WO 51 30,000 500,000 9/2/2008 OF 670 17,000 300,000 WO 1,775 170,000 900,000 9/11/2008 OF 2,062 2,800 13,000 WO 275 11,000 170,000 10/7/2008 OF 1,989 17,000 80,000 WO 4,198 110,000 900,000 11/10/2008 OF 15,531 170,000 1,600,000 WO 15,531 70,000 1,600,000 11/18/2008 OF 7,270 30,000 1,600,000 WO 121 3,000 110,000 12/8/2008 OF 250 1,300 30,000 WO 121 300 900,000 1/12/2009 OF 85 700 900,000

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Conclusions While the City has not been conducting the BMP removal efficiency testing, it did appear that the number of exceedance days (as defined by the CSDM program) decreased during the 2008/09 fiscal year, during which the modular wetland has been in place. In fiscal year 2009/10, there were no Enterococcus exceedances. Fecal coliform exceedances were about the same and total coliform exceedances increased slightly. No additional signage or BMPs have been in place during this time. Table 4 and Figure 1 present the exceedance day data for all indicator bacteria.

Table 4. Exceedance Day Results by Fiscal Year for Harbor Boat Wash Outfall. # Days Total Coliforms Fecal Coliforms Enterococcus Sampled Fiscal Year Frequency of % Frequency of % Frequency of % Exceedance Exceedance Exceedance Exceedance Exceedance Exceedance 2004/05 9 53% 6 35% 1 6% 17 2005/06 10 56% 4 22% 1 6% 18 2006/07 7 47% 6 40% 2 13% 15 2007/08 10 59% 7 41% 2 12% 17 2008/09 8 44% 3 17% 1 6% 18 2009/10 9 60% 4 27% 0 0% 15

Coast 8 Outfall Exceedance Days by Fiscal Year

100%

80%

60% 59% 60% 53% 56% 47% 44% 40% 40% 41% 35% 27% 22%

Percent Exceedance Percent 20% 17% 13% 12% 6% 6% 6% 0% 0% 2004/05 2005/06 2006/07 2007/08 2008/09 2009/10 Fiscal Year

Total Coliforms Fecal Coliforms Enterococcus

Figure 1. Exceedance Day Results by Fiscal Year for Harbor Boat Wash Outfall.

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The 2009/10 fiscal year had the first year with no Enterococcus exceedances; down from just one exceedance the previous year. The percentage for fecal coliform results increased, but only by one additional exceedance day. The same occurred for total coliform exceedances; nine exceedances during the fiscal year, as opposed to eight the previous year. While there were fewer days with ample water to sample, the number of exceedances was about the same as the previous year; implying mixed results.

Ideally, these results could be matched to the removal efficiency results of the wetland to show that, indeed, the wetland is the cause of the reduced number of exceedances. BioClean Environmental, Inc. collected five samples between June and July of 2008 that appear to show removal efficiencies of the wetland itself. Further BMP effectiveness testing was conducted in the spring of 2009, with five samples collected, but testing was only conducted on the BioMediaGREEN+AM filter that was installed in the discharge chamber.

In summary, monitoring will continue at the Harbor boat wash outfall for indicator bacteria and long term effectiveness will continue to be assessed, through Coastal Storm Drain Monitoring. Although removal amounts of trash and hydrocarbons have not been quantified, visual observations of the absorbent pads and trash collection devices all indicate that the wetland is very successful in the removal of these pollutants. The effectiveness for bacteria pollution seems to be less so, although the number of fecal coliform exceedances seems to have decreased the most compared to historical results.

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WATERSHED ACTIVITY IMPLEMENTATION SUMMARY SHEET Water Quality and Education Activity

TITLE: Pet Waste Removal Pilot Project Along San Luis Rey Recreation Trail ID NUMBER: SLR-004

ACTIVITY DESCRIPTION The City of Oceanside manages an eight mile recreational walking and biking trail that is adjacent to the San Luis Rey River. This trail has high recreational traffic including bikers and walkers some of who walk and run their dogs along the trail. Since the trail was opened in 2000, city crews have noticed that pet waste, specifically dog waste, is not always picked up and properly disposed in trash cans, but is left on the trail. The City wants to install pet waste bag dispensers, signage, and trash cans along the trail. City crews have expressed concern about potential problems with installing some of these BMPs including the cost for maintenance and probable vandalism to signs and pet waste bag dispensers. The goal of this project is to determine which types of educational BMPs will enact a behavioral change amongst people who do not pick up pet waste and prioritize specific locations for BMP installation.

Pet waste left on grass, sidewalks, and along trails is not only a leading cause of bacterial contamination in waterways, but it also an issue that concerns Oceanside residents. In the spring of 2009, the City of Oceanside Clean Water Program launched a Pick up Your Pet Waste Campaign to encourage dog owners to clean up after their pets. The project focused on the San Luis Rey River Trail (Trail) which is a location where pet waste still accumulates.

ACTIVITY IMPLEMENTATION FY 2007-08 • Different types and designs of pet waste bag dispensers were researched. At least two different dispensers will be installed to determine the type used by the public, ease of maintenance, and vandalism potential. • Service estimates from pet waste removal companies were received for temporary cleanup services and assessment of waste not picked up along the trail. The company will be asked to provide feedback on sections of the trail that have more waste than other sections. This will help determine the high use areas and where it may be most effective to install the dispensers, signs, and trash cans. • A local Girl Scout troop “adopted” this pilot program as part of their Bronze Award requirements. They agreed to assist in some of the components of the education outreach program. Their activities may include staffing tables along the trail as part of a kick-off event, to be taped on a local television show encouraging people to pick up dog waste, and assess the data collected from the project. They may provide additional assistance where needed. • A Community Based Social Marketing component is planned to be implemented as part of the projects education outreach component. Activities proposed to assist with the CBSM may include a visual observation component, identification of experimental and control areas along the trail, a mail survey to residents to identify barriers, an assessment of survey responses, and recommendations for BMP implementation as a result of the survey assessment.

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ACTIVITY IMPLEMENTATION FY 2008-09 Girl Scout Troop 1215 of Oceanside began assisting with tasks related to the education outreach component which were also part of an overall a Community Based Social Marketing (CBSM) project. The goal of the overall CBSM project is to decrease the amount of pet waste left along the San Luis Rey Recreation Trail and bike path. The four main tasks of the CBSM project include: • Task1: Establish a baseline measure of dog waste in pilot and control areas. This is done to establish the overall effectiveness of the CBSM pet waste pilot project. This task began with a series of observations prior to project implementation to establish a baseline of prevalence of pet waste along the trail. The bike path was divided into one experimental and one control area. • Task 2: Mail survey of residents to identify barriers. The use of a mail survey will identify knowledge, awareness, behavior, and primary barriers with respect to pet waste and pet waste pick-up among residents of the communities surrounding the trail. • Task 3: Analysis and Recommendations. Based on results of the barrier survey program recommendations that incorporate the use of various CBSM components will be developed. • Task 4: Program Implementation: Post-test Evaluation: In order to evaluate effectiveness of the CBSM pet waste project, repeating of the behavioral observations conducted at the start of the project are recommended. Observations should be conduced in the experimental section of the path (where program materials are implemented) as well as in one control section of the path (no materials).

During this reporting period Tasks 1 – 3 were completed and are detailed below.

Task1 - Establish a baseline measure of dog waste in pilot and control areas. As part of the implementation of the CBSM project described above, Girl Scout Troop 1215, located in Oceanside, offered their assistance in implementing components of the CBSM project. Some tasks detailed below were part of the official CBSM project while others were tasks as part of their requirements to earn the Bronze Award which is the highest honor a Girl Scout Junior can achieve:

Skit during Troop meeting During one of the regular Troop meetings, two of the girls conducted a skit demonstrating the importance of picking up after the dog. See Attachment A to this activity sheet for a picture of the two girls during their skit. This task assisted these two girls in earning their Bronze Award.

Intercept surveys along trail This task was part of the CBSM project and was implemented by four girls from Troop 1215. The four girls, along with the Troop Leader and one other parent, conducted intercept surveys along the Trail on a Saturday morning, April 4, 2009. Two different intercept surveys were utilized – one for dog walkers and one for bike trial visitors. See Attachment A to this activity sheet for a copy of the two surveys.

The portion of the Trail targeted for this project was divided into three sections: A, B and C. See Attachment A to this activity sheet for a map of the trail and its identified sections. There is a

SLR-004: Pet Waste Removal Pilot Project along San Luis Rey Recreation Trail Page 2 of 8 FY 2009-10 Activity Implementation Summary Sheet SLR-004 paved bike trial on the south side of the river and a dirt trail on the north side. The Girl Scout troop divided into two groups. One group walked the north side of the trail and one group walked the south side of the trial to conduct the surveys. Prior to conducting the intercept surveys the girls were given direction on how to properly approach people and conduct the surveys.

Troop members approached people on the trail and asked if they would answer four questions. If the trail user had a dog with them, the Girl Scout asked the questions on the Dog Walker Survey. If the trail user did not have a dog with them, the Girl Scout asked the questions on the Bike Trail Visitor Survey. The Girl Scouts also carried pet waste bags with them and offered them to trail visitors who had dogs if they needed them.

There were four objectives to the intercept surveys: 1. Determine if Trail visitors lived in Oceanside 2. Determine which street they lived on in Oceanside 3. Determine where they accessed the Trail 4. Determine if dog walkers had a pet waste bag in hand already.

As a result of question number two on the surveys, a map was created to identity which streets the trail visitors lived on that accessed the trail that day. Question number three provided information on the most common access points to the trail. These two questions helped target the addresses to which the mail survey would be sent and potentially prioritizing BMP installation locations. Because there are thousands of homes located in the vicinity of the trail it was not feasible to mail surveys to all households due to funding limitations. Thus 300 addresses were selected based on the streets and access points noted from the surveys. See Attachment A to this activity for a map denoting streets where trail visitors lived.

Existing Poop Pile Assessment While the Girl Scouts were conducting the surveys, they also counted the number of poop piles on both on the north and south side trails. This helped identify the locations on the trail that had higher concentrations of poop piles. It was determined that the unpaved trail on the north side of the river had more poop piles than the south side. But, this may be due to the fact that City crews clean the paved bike trail on a monthly basis, whereas no cleaning services are conducted on the unpaved trail on the north side.

Tasks 2: Mail survey to identify barriers To inform the public in the development of the campaign, a random sample of 300 Oceanside households located in neighborhoods near the Trail were mailed several pieces of information in April and May 2009. The goal of the survey was to identify the reasons why people do or do not pick up after their pets on the Trail and other public areas. The mail survey included the following items: • Pre notification letter informing residents that they will soon be receiving a brief one-page survey (dated April 27, 2009). • Cover letter requesting the resident to complete the enclosed survey (dated May 1, 2009). • Copy of the survey titled “City of Oceanside Survey of Dog Waste in the Community”. • Postcard reminding residents that a survey was sent the previous week and requesting them to complete and send the survey if not already done (dated May 7, 2009).

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• Self-addressed stamped envelope for respondents to mail their completed survey. • Follow-up letter to addresses from which survey not received as of yet (dated May 14, 2009). • See attachment # for a copy of all the correspondence listed above.

Task 3: Analysis and Recommendations Of the 300 surveys that were mailed 180 surveys were completed and mailed back. This is a 63% completion rate which is higher than the anticipated 50% completion rate. Of those residents who completed the survey, 70% had visited the Trail in the past and 48% reported that they had a dog in their household. See Attachment A to this activity sheet for complete survey results.

The results of the survey provided clear recommendations for the Pick Up Your Pet Waste Campaign at the Trail including the installation of additional trash cans and pet waste bag dispensers as well as modifying signage to emphasize pet owner responsibility. Ninety-three percent of survey respondents agreed that more pet waste dispensers are needed in the community. As a result, the City plans to move forward with installing additional signage, trash cans, and pet waste bag dispensers along the Trail.

ACTIVITY IMPLEMENTATION FY 2009-10 During this reporting period several tasks of the overall project were implemented.

Identification of pilot and control areas along trail The trail was divided into experimental (pilot) and control sections. See Figure 1 below for a map of the trail that shows these trail sections. These different sections will be used to assess the effectiveness of the program.

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Figure 1: San Luis Rey Recreation Trail Control and Pilot Areas for Pet Waste Campaign

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Pet Waste Bag Dispensers Various pet waste bag dispensers were researched to determine the most appropriate to install in the trail based on aesthetics, vandalism potential and ease of use by the public and City staff to maintain and service. One type of dispenser was selected for installation. Four dispensers are scheduled to be installed during FY 2010-11 at the eastern and western ends of the pilot areas on both the north and south sides of the trail.

Signage Signage to be installed at the pet waste bag dispenser stations was produced during this reporting period. With recommendations from Action Research, a community based social marketing company, a sign was created that was simple, easy to read and focused on the behavior that is the “right thing to do”. It was also recommended that the sign focus on one activity, picking up pet waste, and to leave off any leash law messages. See Figure 2 below for the artwork created during this reporting period. Four of these signs are scheduled to be installed along with the pet waste bag dispensers during FY 2010-11.

Figure 2: Pet waste sign created for placement on Oceanside Recreation Trail

Pet Waste Removal As part of the project evaluation it was recommended that all waste be removed from both the pilot and control sections of the trail just prior to installation of the pet waste bag dispenser stations. During this reporting period a contractor was hired to count the number of piles in each section of the trail, remove accumulated pet waste from the trail, and obtain an average weight of the waste piles. This task occurred on June 23 and 24, 2010.

Clean Water Program Newsletter Article During this reporting period an article about the Pick Up Your Pet Waste Campaign was published in the Oceanside Clean Water Program Newsletter. This newsletter was mailed to over 40,000 households. See Attachment A to this activity for a copy of this newsletter that includes this article.

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Video presentation on Oceanside Update (KOCT) The Oceanside Update is produced by Oceanside’s local television station, KOCT, and is a thirty minute program providing information to Oceanside citizens about upcoming community events. Speakers are allowed approximately 3 minutes to provide information specific to their division, department or program. Oceanside’s Clean Water Program regularly tapes for this program about beach and river cleanup vents, other environmental programs and updates on Clean Water Program projects.

In July 2009 three members of Girl Scout Troop 1215, a local Oceanside troop, were videotaped for the Oceanside Update program providing information about the Pick Up Your Pet Waste campaign along the San Luis Rey Recreation trail. This video was shown during the month of August 2009. The half hour Oceanside Update is shown twice per day. See Attachment B to this activity in DVD format for a copy of the Oceanside update program section showing the Girl Scout taping (Cyberlink Power DVD required to view).

Tasks planned for FY 10-11 The following tasks are planned for implementation during FY 2010-11: 1. Installation of pet waste bag dispensers and signage in pilot area. 2. Pet waste piles to be tabulated then removed in pilot and control areas of the trail just after installation of pet waste bag dispensers. 3. Final Report for the Pick Up Your Pet Waste CBSM Campaign 4. If assessment results come back positive, the City will consider installation of dispensers in control areas depending on funding availability.

TMDL APPLICABILITY This section of the river is not under TMDL development or implementation. However, the Pacific Ocean Shoreline at the mouth of the San Luis Rey River is listed as impaired for indicator bacteria on the 2006 Clean Water Act 303(d) List of Water Quality Limited Segments. A TMDL is currently scheduled for development in 2008.

TIME SCHEDULE FOR IMPLEMENTATION Program planning for this activity was completed during the 2007-08 reporting period, with components of the project implemented during FY 2008-09. Additional components of the program were conducted during FY 2009-10. Based on the assessment results Pet waste bag dispensers with positive signage are scheduled to be installed along the trail in FY 2010-11. A final report for the overall project is scheduled for completion during FY 2010-11.

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside

OTHER PARTICIPATING ENTITIES • Girl Scout Troop 1215

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria

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CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Bacteria have been identified as a priority water quality problem in the San Luis Rey River Watershed. Since this activity addresses a priority water quality problem and a priority source, it is consistent with the collective watershed strategy.

EFFECTIVENESS ASSESSMENT

FY 2009-10 During FY 2009-10 a survey was mailed to households near the trial. Of the 300 surveys that were mailed 63% completed surveys were returned. This demonstrated that the survey protocols were very effective in getting feedback from residents about pet waste in their community. See the FY 2008-09 SLR WURMP Annual Report for the assessment of the survey.

FY 2010-11 During FY 2010-10 it is anticipated that the following assessment will be conducted: • Baseline loads of pet waste were tabulated during FY 2009-10. During FY 2010-11 pet waste piles will be tabulated along the entire trail just after installation of pet waste bag dispensers. Task will include collecting and weighing of dog waste left on the trail and disposed in trash cans located along the trail. This will determine if the dispensers are being used by the public. • The number of pet waste bags used from the new dispensers installed along the trail will be tabulated as dispensers are refilled. • Assessment of the type of dispensers and signs installed in the experimental area are effective and acceptable for installation in the control area.

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Attachment A to SLR-004 Pet Waste Removal Pilot Project Along San Luis Rey Recreation Trail

FY 2009-10 SLR WURMP Annual Report

THIS PAGE INTENTIONALLY LEFT BLANK Volume 7, Issue 2 - Fall 2009

California Coastal Cleanup Day & In This Issue • Upcoming creek, river and beach cleanup events Buena Vista Creek Cleanup • Pick Up Your Pet Waste Campaign - Pet waste survey results September 19, 2009 • Water conservation and water pollution prevention tips 9 a.m. - 12 p.m. Pick Up Your Pet Waste Campaign along the Celebrate the 25th Anniversary of California Coastal Cleanup Day by San Luis Rey Recreation Trail participating in the ninth annual Buena Pet Waste Survey Results Vista Creek Cleanup and Oceanside Beach Cleanup. The City of Oceanside, PPetet wwasteaste llefteft oonn ggrass,rass, ssidewalks,idewalks, aandnd aalonglong ttrailsrails iiss nnotot oonlynly a lleadingeading ccauseause ooff bbacterialacterial ccontaminationontamination iinn wwaterways,aterways, bbutut iitt iiss aalsolso aann iissuessue tthathat cconcernsoncerns together with I Love a Clean San Diego, OOceansideceanside rresidents.esidents. IInn tthehe sspringpring ooff 22009,009, tthehe CCityity ooff OOceansideceanside CCleanlean WWaterater Coastkeeper, and 1-800-GOT-JUNK will PProgramrogram llaunchedaunched a PPickick UUpp YYourour PPetet WWasteaste CCampaignampaign ttoo eencouragencourage ddogog be hosting a cleanup along the banks of oownerswners toto cleanclean uupp aafterfter ttheirheir ppets.ets. TThehe pprojectroject ffocusesocuses oonn tthehe SSanan LLuisuis RReyey Buena Vista Creek, as well as a beach RRiveriver TTrailrail wwhichhich iiss uusedsed fforor a vvarietyariety ooff cleanup, on September 19th, from 9 a.m. rrecreationalecreational ppurposesurposes iincludingncluding wwalking,alking, rrunning,unning, aandnd bbiking.iking. MManyany ppeopleeople aalsolso to 12 p.m. Volunteers will receive cleanup Excuse me, bbringring ttheirheir ddogsogs wwithith tthemhem ttoo tthehe TTrail.rail. did you drop supplies, refreshments, community service AAlthoughlthough mmostost ddogog oownerswners wwhoho useuse thethe hours, and a free give-away item. Call the ttrailrail ccleanlean uupp aafterfter ttheirheir ppets,ets, ssomeome ppetet something? Clean Water Program Event Information wwasteaste sstilltill aaccumulatesccumulates aalonglong tthehe ttrail.rail. Line for more details at 760-435-5536. TToo kkickick ooffff tthehe ccampaign,ampaign, a bbriefrief ssurveyurvey waswas mailedmailed ttoo 330000 OOceansideceanside Cleanup sites hhouseholdsouseholds locatedlocated iinn nneighborhoodseighborhoods nnearear tthehe TTrail.rail. TThehe ggoaloal ooff tthehe ssurveyurvey wwasas • Behind Dicks Sporting Goods at Plaza ttoo iidentifydentify tthehe rreasonseasons wwhyhy ppeopleeople ddoo Drive and College Boulevard (3514 oorr ddoo notnot ppickick uupp aafterfter ttheirheir ppetsets oonn tthehe College Boulevard) TTrailrail aandnd iinn ootherther ppublicublic aareas.reas. SSixty-ixty-fi vvee • North of Fire Station #4 located at ppercentercent ooff tthehe hhouseholdsouseholds ccompletedompleted Thunder Drive and Lake Boulevard. tthehe ssurveyurvey aandnd rreturnedeturned iitt ttoo tthehe CCity.ity. OOff thosethose residentsresidents wwhoho ccompletedompleted tthehe • Behind Kohl’s store at College ssurvey,urvey, 7700 percentpercent hhadad vvisitedisited tthehe TTrailrail iinn Boulevard and Marron Road tthehe ppastast aandnd 4488 ppercentercent rreportedeported tthathat ttheyhey • South side of Oceanside Pier hhadad a ddogog iinn ttheirheir hhousehold.ousehold. • Buccaneer Beach at Pacifi c and Morse RReasonseasons forfor PickingPicking UpUp DogDog WasteWaste Streets (1500 South Pacifi c Street) BBothoth ddogog oownerswners andand non-dog-ownersnon-dog-owners agreeagree tthathat iitt iiss iimportantmportant ttoo ppickick uupp ddogog waste,waste, rratingating tthehe iimportancemportance ooff tthehe iissuessue aass 99.6.6 ooutut ooff 110.0. TThehe ttop-ratedop-rated rreasonseasons fforor pickingpicking uupp ddogog wwasteaste aandnd tthrowinghrowing iitt iinn tthehe ttrashrash wwereere bbecause:ecause: ““ItIt To register for this event click on iiss tthehe rrightight tthinghing ttoo ddo”o” aandnd ““ItIt ppollutesollutes pparks,arks, rrivers,ivers, aandnd bbeaches.”eaches.” www.cleanupday.org. CContinuedontinued oonn bbackack ppageage

For more information about Oceanside cleanup events and how you can prevent Urban Runoff Hotline - Help protect our local waterways water pollution, visit this Web site: Please report anything other than rain water entering the storm drain. www.oceansidecleanwaterprogram.org. 760-435-5800 “Only Rain in the Storm Drain!” Pet Waste Survey Results continued from front page BBarriersarriers toto PPickingicking uupp DDogog WasteWaste Protect Water Quality and Conserve Water TThehe vvastast mmajorityajority ooff OOceansideceanside ddogog oownerswners wwhoho wwalkalk ttheirheir ddogsogs by following these simple tips rreportedeported tthathat ttheyhey aalwayslways ppickick uupp aafterfter ttheirheir ppet,et, bbutut 1177 ppercentercent sstatedtated tthathat ttheyhey ssometimesometimes lleaveeave ttheirheir ddog’sog’s wwasteaste bbehindehind wwithoutithout The City of Oceanside is committed to water conservation and ppickingicking iitt uup.p. AAmongmong ddogog oowners,wners, tthehe mmostost ccommonommon rreasonseasons ccitedited water pollution prevention. Oceanside is in a Drought Level 2 fforor whywhy someonesomeone mmightight lleaveeave ddogog wwasteaste bbehindehind wwhilehile wwalkingalking tthehe with mandatory water restrictions to reduce its water use by at TTrailrail wwere:ere: least 8 percent. Follow these simple tips to help conserve water • ForgotForgot toto bbringring a bbagag and prevent water pollution. • NowhereNowhere toto tthrowhrow iitt aawayway • Repair broken or leaking hose bibs, sprinklers and valves. • NoNo oneone elseelse aaroundround ttoo sseeee tthemhem • Eliminate water runoff. • Sweep driveway, sidewalk, patio and deck. No hosing down SSurveyurvey RRecommendationsecommendations of paved surfaces. TThehe rresultsesults ooff tthehe ssurveyurvey pprovidedrovided cclearlear rrecommendationsecommendations • Use a shutoff nozzle on your hose. fforor thethe PPickick UUpp YYourour PPetet WWasteaste CCampaignampaign aatt tthehe TTrailrail iincludingncluding • Add 2” to 3” of mulch around trees and plants to reduce tthehe iinstallationnstallation ooff aadditionaldditional ttrashrash ccansans aandnd ppetet wwasteaste bbagag evaporation. ddispensersispensers aass wwellell aass mmodifyingodifying ssignageignage ttoo eemphasizemphasize ppetet oownerwner • Replace grass with low-water-use plants. rresponsibility.esponsibility. NNinety-threeinety-three ppercentercent ooff ssurveyurvey rrespondentsespondents aagreedgreed • Check faucets and toilets for leaks and fi x promptly. tthathat mmoreore ppetet wwasteaste ddispensersispensers aarere nneededeeded iinn tthehe ccommunity.ommunity. AAss • Take shorter showers. a rresult,esult, tthehe CCityity pplanslans ttoo mmoveove fforwardorward wwithith iinstallingnstalling aadditionaldditional ssignage,ignage, ttrashrash ccans,ans, aandnd peett wwasteaste bbagag ddispensersispensers aalonglong tthehe TTrail.rail. Online Resources SScoopcoop thethe PoopPoop – IIt’st’s a DDogog OwnerOwner DDoody!oody! TThehe CCityity aaskssks tthathat yyouou kkeepeep tthehe ffollowingollowing ttipsips iinn mmindind wwhenhen www.SaveWaterOceanside.com yyouou pplanlan ttoo wwalkalk yyourour ddog.og. The City of Oceanside now has a Web site dedicated to water • TakeTake a bbagag wwithith yyouou oorr uusese a ppersonalersonal ppetet wwasteaste bbagag ddispenserispenser conservation. Log onto www.SaveWaterOceanside.com for more • PickPick uupp aandnd ddisposeispose ooff wwasteaste iinn a ttrashrash ccan,an, nnotot aalonglong tthehe ssideide ooff water-saving tips and useful resource information. tthehe ttrailrail oorr ssidewalkidewalk www.bewaterwise.com FForor copiescopies ooff tthehe ssurveyurvey aalonglong wwithith fi nnalal ssurveyurvey rresultsesults llogog oonn ttoo The Metropolitan Water District is offering free online low-water- wwww.oceansidecleanwaterprogram.org.ww.oceansidecleanwaterprogram.org. TThankhank yyouou fforor ddoingoing yyourour use landscape classes for residents and professionals at ppartart ttoo pprotectrotect wwaterater qqualityuality bbyy ppickingicking uupp aafterfter yyourour ddog.og. www.bewaterwise.com. The following classes are available: • Mini tutorials on the Basics: Four short lessons cover the key points of water-wise gardening. (15 minutes each) 2009-2010 River, Creek, & Beach Cleanup Events • In-Depth tutorials for Home Gardeners: Residential gardeners can dig into these more detailed lessons. (60 minutes each) Please join the Clean Water Program staff and citizen volunteers to assist in • Professional Landscape Maintenance tutorials: If you landscape removing trash and debris from our local rivers, creeks, and beaches. for a living, update your knowledge on landscape irrigation systems, fi ne tuning the controller, irrigation scheduling Event Times: 9:00 a.m. - 12:00 p.m. considerations, and much more. Event Details: 760-435-5536 • Seminarios Profesionales de Mantenimiento de Paisaje - Ahora en español: Si usted trabaja en mantenimiento de jardines, • November 7, 2009: San Luis Rey River Cleanup actualice su conocimiento en sistemas de riego, en ajustar el controlador, en el plan de riego, y mucho más. • April 24, 2010: Loma Alta Creek Cleanup Get a No-Cost Home Energy and • July 5, 2010: Morning After Mess - City Beaches (8 - 11 a.m.) Water Savings Kit from SDG&E • September 18, 2010: Buena Vista Creek Cleanup and Save energy, save money, and help the environment with this California Coastal Cleanup Day complimentary kit which contains a low-fl ow shower head and three faucet aerators. When installed, they can help you save water • November 6, 2010: San Luis Rey River Cleanup and the energy used to heat it. To request your kit today, visit www.sdge.com/energykit, or call 1-800-644-6133.

City of Oceanside Clean Water Program 300 North Coast Highway Oceanside, California 92054 760-435-5800 www.oceansidecleanwaterprogram.orgg FY 2009-10 Activity Implementation Sheet SLR-005

WATERSHED ACTIVITY SUMMARY SHEET Water Quality Activity

TITLE: Pet Waste Bag Dispenser Program in County Parks ID NUMBER: SLR-005

ACTIVITY DESCRIPTION The County of San Diego provides pet waste bag dispensers at County parks. The County installs, maintains, and inventories pet waste dispensers in its parks throughout the year. Two important goals of this program are to reduce the amount of pet waste found in parks and to educate the public on the need to cleanup after their pets. Realization of these goals will result in the reduction of pollutant loads, particularly bacteria and nutrients.

The County’s jurisdictional goal for this five-year permit cycle is to increase the total number of parks with pet waste bag dispensers by 100% (i.e., from 26 parks to 52 parks).

FY 2007-08 ACTIVITY IMPLEMENTATION During the FY 2007-08 reporting period the County of San Diego maintained eleven dispenser stations at three parks within the San Luis Rey River Watershed.

FY 2008-09 ACTIVITY IMPLEMENTATION No additional stations were added in FY 2008-09. During this reporting period the County of San Diego continued to maintain eleven dispenser stations at three parks in the San Luis Rey River Watershed. The parks and the number of dispensers include: • Live Oak Park (3 dispensers) • Palomar Park (1 dispenser) • Guajome Regional Park (7 dispensers)

FY 2009-10 ACTIVITY IMPLEMENTATION No additional stations were added in FY 2009-10. During this reporting period the County of San Diego continued to maintain eleven dispenser stations at three parks in the San Luis Rey River Watershed. The parks and the number of dispensers include: • Live Oak Park (3 dispensers) • Palomar Park (1 dispenser) • Guajome Regional Park (7 dispensers)

TMDL APPLICABILITY This activity is planned for future implementation of the recently adopted TMDL for Indicator Bacteria, Project 1 – Beaches and Creeks in the San Diego Region.

TIME SCHEDULE FOR IMPLEMENTATION • Maintenance of existing pet waste dispensers – Ongoing • Addition of new dispensers in County parks – Ongoing

SLR-005 Pet Waste Bag Dispenser Program in County Parks Page 1 of 2 FY 2009-10 Activity Implementation Sheet SLR-005

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • None

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Bacteria and nutrients have been identified as priority water quality problems in the San Luis Rey River Watershed. Parks, and pet waste in particular, are potential sources of bacteria and nutrients. Since this activity addresses a priority water quality problem and a priority source, it is consistent with the collective watershed strategy.

EFFECTIVENESS ASSESSMENT

FY 09-10 Facility Name # of Bags Dog Waste Removed # of Stations Used (lbs) Live Oak Park 3 8,075 1,615 Palomar Park 1 3,230 646 Guajome Regional Park 7 22,610 4,522 Total 11 33,915 6,783

During the FY 2009-10 reporting period the County maintained 11 stations among three County Parks within the San Luis Rey River Watershed. These stations distributed approximately 33,915 bags, preventing an estimated 6,783 lbs. of pet waste from entering the watershed. Bacteria load reduction estimates are based on the number of bags distributed and the following assumptions obtained from a 2004 County of San Diego study conducted at the San Elijo Lagoon Ecological Reserve: • Assumption 1: The average weight of pet waste per bag is approximately 0.2 lbs • Assumption 2: In addition to the bags taken from the County’s dispensers, an additional 30% of pet waste bags are brought to the parks by the pet owners themselves.

SLR-005 Pet Waste Bag Dispenser Program in County Parks Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-007

WATERSHED ACTIVITY SUMMARY SHEET Education Activity FY 2009-10 Implementation Summary

TITLE: Water Quality Runoff Management and Agricultural Waiver Workshop for Nurseries and Agricultural Businesses

ID NUMBER: SLR-007

ACTIVITY IMPLEMENTATION This free educational workshop targeted nurseries and agricultural businesses and was held at the San Diego County Farm Bureau in Escondido on June 24, 2010. Four speakers provided owners and operators and agricultural resources agencies with a better understanding of water quality runoff management issues related to their operations. Growers from north San Diego County watersheds were invited to attend (San Luis Rey, San Dieguito, and the Carlsbad Hydrologic Unit).

Topics covered during the workshop were as follows: • Overview. • Irrigated Agricultural Waivers. • Irrigated lands group. • Federal assistance.

Respective speakers for the topics above were as follows: • Cynthia Mallett – City of Oceanside • Eric Larson – San Diego County Farm Bureau (SDCFB) • Pete Peuron – San Diego Regional Water Quality Control Board (SDRWQCB) • Cori Calvert – United States Department of Agriculture and National Resource Conservation Service USDA/NRCS

Speakers and Topics • Cynthia Mallett from the City of Oceanside provided an overview of the regulations that affect Nursery and Agricultural operations. She also provided information on the role that municipalities play in assisting growers in complying with these regulations. There was also a sample employee training tracking form provided. • Pete Peuron from the SDRWQCB discussed the conditional waiver for discharges from agricultural and nursery operations, that became effective in 2008. • Eric Larson from the SDCFB provided an overview of monitoring groups and how their operation can benefit from participating in a collective approach to runoff compliance. • Cori Calvert from the USDA/NRCS explained how NRCS can assist growers to develop conservation plans, as well as discussing funds available through the 2008 Farm Bill to help nurseries and agricultural operations in complying with water quality regulations.

A total of 62 people were in attendance at the workshop including workshop organizers and speakers: 45 agricultural related and 17 governmental/jurisdictional. A breakdown of attendees of the workshop is as follows:

SLR-007 Water Quality Runoff Management and Agricultural Waiver Workshop for Nurseries and Agricultural Businesses Page 1 of 5 FY 2009-10 Activity Implementation Summary Sheet SLR-007

Agricultural (45) Other (17) 11- Advisors/Grove Care Governmental - 10 3 - Farm Supplier Jurisdictional - 7 21 - Grove (Avocado or other) 9 - Nursery 1- Combination Nursery and Grove

See Figure 1 below for a map that identifies agricultural facilities represented at the workshop. This map does no reflect representatives from governmental agencies that attended the workshop. Also, some facilities are not represented on the map because multiple attendees represented the same facility and other workshop attendees represented agricultural operations outside of San Diego County and in watersheds south of the northern San Diego County watersheds shown on the map.

SLR-007 Water Quality Runoff Management and Agricultural Waiver Workshop for Nurseries and Agricultural Businesses Page 2 of 5 FY 2009-10 Activity Implementation Summary Sheet SLR-007

Figure 1. Facilities Represented at the June 24, 2010 Agricultural Workshop.

SLR-007 Water Quality Runoff Management and Agricultural Waiver Workshop for Nurseries and Agricultural Businesses Page 3 of 5 FY 2009-10 Activity Implementation Summary Sheet SLR-007

Prior to and after the completion of the workshop each attendee was given a pre- and post-test to determine their knowledge of the topics covered during the workshop. A total of 25 attendees took both the pre-test and post-test (some attendees arrived after the pre-test was given or left before the post-test was given). This test included ten questions that were provided by the speakers. The average pre-test score was 5.48. The average post-test score was 8.36. These scores represent a 61.03% increase in knowledge of the topics reviewed during the workshop.

TMDL APPLICABILITY This activity is not planned for implementation in compliance with a TMDL.

TIME SCHEDULE FOR IMPLEMENTATION This workshop is planned to be implemented every two years. The first workshop was held on March 27, 2008. The second workshop was held on June 24, 2010. The next workshop is slated to be held during FY 2011-12.

PARTICIPATING WATERSHED COPERMITTEES All watershed copermittees within the three watersheds (Oceanside, Vista and County of San Diego) disseminated information to constituents in their jurisdictions. The City of Oceanside secured speakers, developed workshop announcement materials, paid for material printing and moderated the workshop. The Upper San Luis Rey Resource Conservation District provided lunch and refreshments for the workshop. Other copermittees provided support during the workshop itself.

OTHER PARTICIPATING ENTITIES • University of California Cooperative Extension • Regional Water Quality Control Board • County of San Diego Ag, Weights and Measures • USDA, Natural Resources Conservation Service • San Diego County Farm Bureau • Upper San Luis Rey Resource Conservation District

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Organics • Sediment • Pesticides • Nutrients • Bacteria

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The San Luis Rey River Watershed strategy identifies bacteria and nutrients as high priority water quality pollutants in various hydrologic areas throughout the watershed. Nursery and Agricultural operations have been identified as potential discharge contributors of bacteria and nutrients. This activity addresses high priority water quality problems and potential sources of

SLR-007 Water Quality Runoff Management and Agricultural Waiver Workshop for Nurseries and Agricultural Businesses Page 4 of 5 FY 2009-10 Activity Implementation Summary Sheet SLR-007 the problems within the watershed. Therefore the activity is consistent with the San Luis Rey WMA strategy.

EXPECTED BENEFITS Expected benefits included educating agricultural growers and operators about storm water regulations and the best management practices that can be implemented to eliminate runoff from growing operations.

EFFECTIVENESS ASSESSMENT A total of 25 attendees took both the pre-test and post-test which included ten questions that were provided by the speakers. The average pre-test score was 5.48 and the average post-test score was 8.36 representing a 61.03% increase in knowledge of the topics reviewed during the workshop. This demonstrates an increase in knowledge and awareness of the topics presented (Level 2).

RECOMMENDATIONS It is recommended that this workshop be implemented every two years that addresses stormwater topics relevant to the agricultural industry.

CONCLUSIONS Implementing a pre- and post-test to determine attendee knowledge of the topics covered during the workshop was deemed successful with a 61% increase in score. Also, 62 people were in attendance demonstrating the strong interest from the agricultural community to learn about stormwater related issues and the BMPS that can be implemented and resources available to assist in complying with regulations. This workshop saw an increase in agricultural operator and owners attendee from the Agricultural workshop conducted in March 2008. 45 agricultural related people attended this meeting compared to 29 in March 2008. The number of governmental and jurisdictional attendees stayed consistent: 17 for the 2010 workshop and 19 for the 2008 workshop.

SLR-007 Water Quality Runoff Management and Agricultural Waiver Workshop for Nurseries and Agricultural Businesses Page 5 of 5

THIS PAGE INTENTIONALLY LEFT BLANK FY 2009-10 Activity Implementation Summary Sheet SLR-008

WATERSHED ACTIVITY SUMMARY SHEET Water Quality Monitoring Activity

TITLE: Guajome Lake Water Quality Monitoring Program ID NUMBER: SLR-008

ACTIVITY DESCRIPTION The County of San Diego is implementing a monitoring program to assess the contribution of urban runoff (specifically nutrients) to the eutrophication of Guajome Lake. On January 7, 2005, a joint reconnaissance of the Guajome Lake area was conducted with the City of Oceanside, the County Department of Agriculture, Weights, & Measures (AWM), the County Department of Parks and Recreation (DPR), and the County Department of Public Works (DPW). All drainages into and out of Guajome Lake were characterized and it was concluded that only the flows from the northern subbasin enter the lake. From February through April 2005, seven locations in the northern subbasin were monitored and two of those were selected as long-term monitoring sites. They included the East Channel Creek at Hutchison Street and Hidden Lake Lane (GUL02) and the East Channel Creek at Hitching Post Drive (GUL07). GUL02 is located in the middle of the subbasin and is co-located with the County of San Diego’s dry weather monitoring site SLR04. GUL07 is located in the East Channel Creek and represents the bottom of the drainage. Preliminary investigations into land uses have identified potential sources to include residential, commercial nurseries, commercial horse facilities, and residential horse facilities.

FY 2007-08 ACTIVITY IMPLEMENTATION During the FY 2007-08 reporting period, the County of San Diego continued monitoring activities at the two long-term sites at Guajome Lake (GUL02 and GUL07).

FY 2008-09 ACTIVITY IMPLEMENTATION During the FY 2008-09 reporting period, the County of San Diego continued monitoring activities at the two long-term sites at Guajome Lake (GUL02 and GUL07).

FY 2009-10 ACTIVITY IMPLEMENTATION During the FY 2009-10 reporting period, the County of San Diego continued monitoring activities at the two long-term sites at Guajome Lake (GUL02 and GUL07). For additional information, refer to Attachment A of this Watershed Activity Summary Sheet.

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

TIME SCHEDULE FOR IMPLEMENTATION • Monthly sampling of long-term stations - Ongoing

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

SLR-008 Guajome Lake Water Quality Monitoring Program Page 1 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-008

OTHER PARTICIPATING ENTITIES • None

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • All

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The collective watershed strategy identifies nutrients as a high priority water quality problem in the San Luis Rey WMA. This nutrient monitoring program is therefore consistent with the strategy.

EFFECTIVENESS ASSESSMENT During the FY 2009-10 reporting period, the County of San Diego conducted sampling at the two long-term locations in Guajome Lake (Level 1 Outcome). For additional information, refer to Attachment A of this Watershed Activity Summary Sheet.

SLR-008 Guajome Lake Water Quality Monitoring Program Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-009

WATERSHED ACTIVITY SUMMARY SHEET Water Quality Activity

TITLE: Nutrient Source Identification and Abatement: Guajome Lake ID #: SLR-009

ACTIVITY DESCRIPTION The County of San Diego Departments of Public Works (DPW) and Agriculture, Weights, and Measures (AWM) continue to collaborate on a project to identify and abate the source(s) of elevated nutrient levels entering Guajome Lake. Nitrate concentrations have been observed to exceed dry weather action levels at the County’s SLR 04 dry weather monitoring station (Hutchison Street at Hidden Lake Lane) since 2002. This station is upstream of Guajome Lake. Guajome Lake is listed as impaired for eutrophication on the 2008 Clean Water Act 303(d) List of Water Quality Limited Segments. Phosphorous is another nutrient potentially contributing to the eutrophication problem.

FY 2007-08 ACTIVITY IMPLEMENTATION The following tasks were completed during FY 2007-08: • Performed frequent water quality screenings for nitrate, dissolved oxygen, and other parameters at field site SLR 04. • Performed additional upstream water quality monitoring and source investigations as appropriate to identify potential sources of the elevated nitrate levels. • Compiled an inventory and map of potential nitrate sources in the SLR 04 drainage area. It was determined that there are eight nurseries within the unincorporated area tributary to the SLR 04 monitoring station. • Compiled baseline information on BMP implementation and compliance history for nurseries within the SLR 04 drainage area. Of the eight nurseries in this drainage area, three have been inspected by the County AWM Department. Two of the three inspected nurseries had one or more violations. Most violations were related to a failure to maintain adequate training records.

FY 2008-09 ACTIVITY IMPLEMENTATION The following tasks were completed during FY 2008-09: • Performed water quality screenings for nitrate, dissolved oxygen, and other parameters at SLR 04. Field water quality activities were conducted on four dates throughout the year. • Performed additional upstream water quality monitoring and source investigations as appropriate to identify potential sources of the elevated nitrate levels. • Conducted targeted inspections to abate potential sources of nitrates. Six nurseries in the SLR 04 drainage area were inspected during FY 2008-09. One cactus/succulent nursery was inspected in late FY 2007-08, but was not inspected in FY 2008-09 because of good compliance history and low threat classification. One nursery went out of business. One additional nursery was identified and inspected in September 2009. • Education to nursery operations in the activity areas focused on nitrate pollution, nutrient assessment, and fertilizer management. During inspections at identified nurseries, the operators were supplied with information and tools to assess and manage fertilizer use at SLR-009 Nutrient Source Identification and Abatement: Guajome Lake Page 1 of 6

FY 2009-10 Activity Implementation Summary Sheet SLR-009

their site. The UC Cooperative Extension Service document Runoff & Nonpoint Source Pollution Self-Assessment was provided to the nurseries. The Rainbow Creek Nutrient Reduction Management Plan is another source of valuable information for nitrate pollution prevention that will be referenced as a tool for the operators. • Notices of Violation were issued and follow up inspections were conducted whenever non- compliance was found at the nurseries. During FY 2008-09, excluding paperwork violations, only one nursery had best management practice non-compliance; see Table 3. No direct sources of nitrates from the nurseries were identified.

FY 2009-10 ACTIVITY IMPLEMENTATION The following tasks were completed during FY 2009-10: • Performed water quality screenings for nitrate, dissolved oxygen, and other parameters at SLR 04. Field water quality activities were conducted on three dates throughout the year. • Performed additional upstream water quality monitoring and source investigations as appropriate to identify potential sources of the elevated nitrate levels. • Conducted targeted inspections to abate potential sources of nitrates. The contributing area was expanded to include additional upstream sources and 25 nurseries in the expanded SLR 04 drainage area were inspected during FY 2009-10. • When appropriate, educational materials were supplied to operators. Education to nursery operations in the activity areas focused on nitrate pollution, nutrient assessment, and fertilizer management. During inspections at identified nurseries in these areas, the operators were supplied with information and tools to assess and manage fertilizer use at their site. • Notices of Violation were issued and follow up inspections were conducted whenever non- compliance was found at the nurseries. During FY 2009-10, excluding paperwork violations, four nurseries had best management practice non-compliances (See Table 3). No direct sources of nitrates from the nurseries were identified.

TMDL APPLICABILITY This activity is not specifically implemented in compliance with a TMDL.

SLR-009 Nutrient Source Identification and Abatement: Guajome Lake Page 2 of 6

FY 2009-10 Activity Implementation Summary Sheet SLR-009

TIME SCHEDULE FOR IMPLEMENTATION

Table 1. Implementation Schedule FY FY FY FY Status Planned Tasks 07-08 08-09 09-10 10-11 Compile (update) an inventory and map of potential nutrient sources in the SLR 04 X X X X Complete drainage area. Compile (update) baseline information on BMP implementation and compliance history for facilities and other sources X X X X Complete within the SLR 04 drainage area (for the purposes of tracking improvements over time). Perform water quality screenings for X X X X Ongoing nutrients and other parameters at SLR 04 Perform additional upstream water quality monitoring and source investigations as X X X X Ongoing appropriate to identify potential sources of the elevated nutrient levels. Conduct targeted inspection activities as necessary to abate identified sources of X X X X Ongoing nutrients. Conduct targeted education activities as necessary to abate identified sources of X X X X Ongoing nutrients. Conduct targeted enforcement activities as necessary to abate identified sources X X X X Ongoing of nutrients. Identify field grown agricultural TBD businesses in drainage area

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • None

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY This activity is consistent with the collective watershed strategy in that nutrients are identified as a high priority water quality problem in the Mission HSA (HSA 903.11) and this activity is aimed at identifying and abating nutrient sources in the watershed.

SLR-009 Nutrient Source Identification and Abatement: Guajome Lake Page 3 of 6

FY 2009-10 Activity Implementation Summary Sheet SLR-009

EFFECTIVENESS ASSESSMENT Table 2. Effectiveness Assessment

Assessment Planned Tasks Targeted Outcome Measures Level

Compile an inventory and map of 1 Completion Yes potential nutrient sources in the SLR 04 drainage area. Compile baseline information on BMP 1 Completion Yes implementation and compliance history for facilities and other sources within the SLR 04 drainage area (for the purposes of tracking improvements over time). Perform frequent water quality 1 4 field screenings / yr at 75% complete, 3 screenings for nutrient and other SLR 04 screenings complete parameters at SLR 04 6 Reduction in exceedances To be determined of dry weather action level for nitrates measured at SLR 04 by 2012 Conduct targeted inspection activities 1 Inspection of 100% of Yes as necessary to abate identified nurseries in the SLR 04 sources of nutrients. drainage area by June 2009 3 Reduction in nursery BMP Of those nurseries with violations observed during multiple scores, BMP nursery inspections in the compliance improved or SLR 04 drainage area by stayed the same at all 2010 nurseries except one in FY 2009-10 Conduct targeted education activities 2 Improvement in Stormwater Of those nurseries with as necessary to abate identified Knowledge Assessments multiple scores, only sources of nutrients (SKA) scores administered one decreased in SKA to nursery staff in the SLR score. All other 04 drainage area by 2012 nurseries have either improved or remained the same.

SLR-009 Nutrient Source Identification and Abatement: Guajome Lake Page 4 of 6

FY 2009-10 Activity Implementation Summary Sheet SLR-009

Table 3. Updated Inventory

Reduced # of # of BMP Improved Inspection BMP* SKA Violations SKA Score Facility Name Date Violations Score Over Time Over Time TTWQ Aloha Tropicals 9/22/2009 0 6 N/A N/A Low Aquino Greenhouse 2/8/2010 0 1 N/A N/A Medium Booman Floral #1 7/6/2009 0 9 N/A N/A Medium Booman Floral #2 7/6/2009 0 9 Yes N/A Medium 1/8/2007 0 N/A 10/6/2004 0 N/A 4/8/2004 1 N/A Booman Floral #3 7/6/2009 0 9 None N/A Medium 1/8/2007 0 N/A Butterfly Nursery 10/20/2009 0 N/A None N/A Medium C & J Cactus Nursery #1 4/18/2008 0 10 Yes N/A N/A 9/5/2006 1 N/A Choice Nursery 6/10/2010 0 8 None N/A Medium Emmanuel Growers 7/22/2009 2 2 N/A N/A Low Exotica Rare Fruit 6/10/2010 0 7 None N/A High 4/23/2007 0 N/A 1/6/2006 0 N/A Garden Glories 5/28/2010 0 8 N/A N/A Medium Green Acres Nursery Inc #1 2/16/2010 0 5 Yes Same Medium 9/8/2009 3 5 Gutierrez Nursery 4/2/2010 0 7 N/A N/A Low Joanie's Greenhouse 9/11/2009 0 6 Yes No Low 9/3/2008 0 8 6/12/2008 1 7 Kent's Bromeliads #2 4/23/2010 1 N/A No N/A Medium 10/14/2009 0 8

SLR-009 Nutrient Source Identification and Abatement: Guajome Lake Page 5 of 6

FY 2009-10 Activity Implementation Summary Sheet SLR-009

Reduced # of # of BMP Improved Inspection BMP* SKA Violations SKA Score Facility Name Date Violations Score Over Time Over Time TTWQ Martin Carvillo 9/21/2009 0 N/A N/A N/A N/A Pacific Verde Nursery Inc 7/13/2009 0 5 Yes Same Low 5/27/2009 1 5 1/15/2008 1 N/A Parker Greenhouse 7/29/2009 OOB N/A N/A N/A 6/26/2009 0 7 None Same Same 6/25/2008 0 7 Plug Connection 6/24/2010 0 10 None Yes 4/19/2010 0 9 9/3/2009 0 8 Ponto Nursery #1 4/19/2010 0 7 Yes Yes Medium 1/27/2010 7 5 Ponto Nursery #2 1/27/2010 0 5 None N/A Rancho Del Oro Landscape 11/2/2009 0 4 N/A N/A Medium Rivera's Garden Treasures 1/6/2010 0 3 N/A N/A Medium Sphaeroid Institute 6/4/2010 0 10 None Yes Medium 8/13/2008 0 7 Tony's Tropicals 3/1/2010 0 5 N/A N/A Low Vista Ventura Inc #1, DBA Botanical Partners 5/24/2010 0 10 N/A N/A High Weeks Xeroic Succulent Gardens 9/25/2009 0 5 N/A N/A N/A

SLR-009 Nutrient Source Identification and Abatement: Guajome Lake Page 6 of 6

FY 2009-10 Activity Implementation Summary Sheet SLR-010

WATERSHED ACTIVITY IMPLEMENTATION SUMMARY SHEET Water Quality/Monitoring Activity

TITLE: Lower San Luis Rey Source Identification Project ID NUMBER: SLR-010

ACTIVITY IMPLEMENTATION The main objectives of this project are to: • Identify point and non-point sources of bacteria contamination in the Lower San Luis Rey River and at the river mouth during dry and wet seasons. • Estimate the bacterial loading from tributaries and along the main stem of the San Luis Rey River during dry and wet seasons. • Recommend Best Management Practices (BMPs) to reduce and/or eliminate bacterial sources.

ACTIVITY IMPLEMENTATION FY 2007-08 Implementation of this project began in FY 2007-08 with the City being awarded a Proposition 50 Clean Beaches Initiative Grant from the State Water Resources Control Board (SWRCB) to identify the potential sources of bacteria in the Lower San Luis Rey River. The City then sought out a diverse group of experts in bacteria source tracking, Copermittees, and non-profit groups to create a Technical Advisory Committee (TAC) to guide the project. The first TAC meeting was held on November 1, 2007 and included representatives from the Cities of Oceanside and Vista, the County’s Department of Environmental Health and Watershed Protection Program, the Regional Water Quality Control Board (RWQCB), and CoastKeeper.

A Request for Proposals (RFP) was sent out on November 8, 2007 to solicit proposals from interested and experienced consultants. Proposals were due to the City by December 4 th and a subcommittee of the TAC reviewed the proposals on December 7, 2007. MACTEC Engineering and Consulting, Inc. was awarded the contract. Oceanside City Council approved the contract with MACTEC on February 20, 2008.

A TAC meeting was held on February 4, 2008 where the MACTEC project team presented the proposed project approach. The approach was discussed and the TAC made recommendations to be included in the Monitoring Plan and QAPP. The Monitoring Plan and QAPP were submitted to the SWRCB for approval on April 28, 2008. The SWRCB and the Moss Landing QA Research Group reviewed the Monitoring Plan and QAPP and the final version of the documents were approved by the SWRCB on June 19, 2008.

The first dry season monitoring event took place on June 18 and 19, 2008. Dr. Rachel Noble traveled to San Diego to prepare for the first event with the project team and participate both days of monitoring. The project team collected bacteria samples and flow measurements at six monitoring locations in the Lower San Luis Rey River. The bacteria samples were analyzed for fecal indicator bacteria and the remaining sample volume was filtered and frozen for molecular analysis. The river mouth was not sampled, as planned, due to construction of the Pacific Street Bridge.

SLR-010 Lower San Luis Rey Bacteria Source Tracking Study Page 1 of 4

FY 2009-10 Activity Implementation Summary Sheet SLR-010

ACTIVITY IMPLEMENTATION FY 2008-09 The second dry season event took place in FY 2008-09 on July 23 and 24, 2008. The project team collected bacteria samples and flow measurements at five of six monitoring locations in the Lower San Luis Rey River. As part of the Visual Observation Program, observations were conducted July 23 and 24, 2008 within the Lower San Luis Rey River and upstream in the drainage basin to identify possible sources of bacteria. The river mouth was again not sampled, due to construction of the Pacific Street Bridge.

Based on the fecal indicator bacteria (FIB) results of the first two dry weather monitoring events, four of six project sampling sites (Murray Bridge, Douglas Bridge, Pilgrim Creek, and Sleeping Indian) were selected for additional genetic molecular analysis. Two were river sites and two were tributaries. Genetic molecular analysis was conducted on samples collected at these sites during days 1 and 2 of the June 2008 event. There were no FIB exceedances of standards during the July 2008 event and, therefore, none of those sites were chosen for additional analysis per the QAPP and Monitoring Plan.

On December 19, 2008, the SWRCB issued a Budget Letter that suspended all projects including the Lower San Luis Rey Source Identification Project. The work completed after this notice was primarily to assess the status of various elements of the project, including laboratory work and the effect of the stop work notice on genetic analysis. The City of Oceanside requested an assessment from MACTEC of the molecular sample holding times for samples not yet analyzed and a summary from our contractors of what and where data that had been analyzed is located. Unfortunately, samples for two of the three types of genetic analyses had expired and are therefore no longer available for use to the program. Samples were analyzed for Enterovirus A by Dr. Jed Furman’s laboratory at the University of Southern California. Enterovirus A was not detected in any of the samples.

The monthly joint monitoring program conducted by the City of Oceanside and the County of San Diego continued as modified for the Grant project until June of 2009.

ACTIVITY IMPLEMENTATION FY 2009-10 Beginning in July 2009, the City brought the monitoring in-house to the San Luis Rey Wastewater Treatment Plan Laboratory. The same field procedures were followed, but the reporting limits changed to above SWAMP recommendations. This change is not expected to effect results, as bacteria levels are usually at or above these reporting limits.

On December 17, 2009, the State Water Resources Control Board gave the City of Oceanside notice that the Lower San Luis Rey Source Identification Project grant had been selected to restart. With an original grant end date of March 31, 2010, the City of Oceanside, on January 4, 2010, submitted a Request for Time Extension in order to complete the remaining two-thirds of the field and laboratory work required.

On April 14, 2010, the City of Oceanside received the executed amendment to the Grant Agreement and work began immediately to restart the project.

SLR-010 Lower San Luis Rey Bacteria Source Tracking Study Page 2 of 4

FY 2009-10 Activity Implementation Summary Sheet SLR-010

The third dry season monitoring event in the Lower San Luis Rey River/River Mouth was implemented on May 18, 19, and 20, 2010. On May 18, 2010, The City of Oceanside and the County of San Diego conducted the joint monitoring at 17 locations in Lower San Luis Rey River and the grant project team collected composite water samples and sediment samples at five locations in the River Mouth. In addition, the City of Oceanside collected additional samples at each Watershed monitoring location for potential further genetic analysis on upstream sites within the City boundary. On May 19 and 20, 2010, the grant project team collected composite water samples and sediment samples at five locations in the River Mouth and composite water samples at two river locations (Bonsall Bridge and the Critical Point).

Although the FIB results for the river mouth samples were all below AB411 standards a total of eleven water samples, ten river samples and one river mouth sample, were selected for genetic testing including Bacteriodes and Human Enteroviruses based on steady state standards. In addition, ten paired water and sediment samples from four sites were selected for bacterial community fingerprinting which will compare the bacteria community of the water samples to the bacterial community of the sediment samples.

The Visual Observations Program was implemented on the first day of sampling, May 18, 2010. Two teams of two, walked a total of four locations adjacent to the river mouth. Teams were looking for urban runoff and wildlife that could be affecting the river mouth. Observations that were recorded included human behavior, maintenance procedures, and wildlife distribution.

The remaining dry weather sampling event and four wet season (two wet-weather and two ambient events) will be completed in the 2010-11 fiscal year.

TMDL APPLICABILITY This activity is planned for future implementation of the recently adopted TMDL for Indicator Bacteria, Project 1 – Beaches and Creeks in the San Diego Region.

TIME SCHEDULE FOR IMPLEMENTATION Due to the stop work notice issued in December of 2008, the schedule for implementation/completion was amended. The Final Project Report is due to the SWRCB on June 1, 2011.

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside • City of Vista • County of San Diego

OTHER PARTICIPATING ENTITIES • MACTEC Engineering and Consulting, Inc. • Technical Advisory Committee includes representatives from: • RWQCB • CoastKeeper

SLR-010 Lower San Luis Rey Bacteria Source Tracking Study Page 3 of 4

FY 2009-10 Activity Implementation Summary Sheet SLR-010

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Because the sources of bacterial contamination in the Lower San Luis Rey River are not adequately characterized, characterization in the form of a source identification study is consistence with the collective watershed strategy. Once the sources have been better characterized, the City will move forward with developing and implementing BMPs to reduce and eliminate the bacterial source to the maximum extent practicable.

EFFECTIVENESS ASSESSMENT The outcome of this project is the identification of bacterial sources contributing to water quality impairments in addition to the development of a list of potential BMPs for these sources. It is anticipated that the implementation of BMPs, which will be separate, future activities, will lead to Level 4, 5, and 6 effectiveness assessment outcomes.

SLR-010 Lower San Luis Rey Bacteria Source Tracking Study Page 4 of 4

FY 2009-10 Activity Implementation Summary Sheet SLR-012

WATERSHED ACTIVITY SUMMARY SHEET Water Quality Activity

TITLE: Land Acquisitions ID NUMBER: SLR-012

ACTIVITY DESCRIPTION The San Diego County Board of Supervisors approved the Multiple Species Conservation Program (MSCP) in 1997 as an integral part of the County’s efforts to protect parks and open space. The goal of the MSCP (a 50-year program) is to maintain and enhance biological diversity in the region and maintain viable populations of endangered, threatened, and key sensitive species and their habitats. Land acquisition also provides a significant water quality benefit for the watersheds in which it occurs. MSCP acquisition precludes development from occurring and allows land to retain its natural perviousness.

The MSCP is a cooperative effort among the County and other local jurisdictions and the U.S. Fish and Wildlife Service and the California Department of Fish and Game (the Wildlife Agencies). These public partners work with various private landowners, conservation groups, community planning groups, developers, and other stakeholders. The County of San Diego has adopted an MSCP for the southwestern portion of the County. MSCP plans for the Northern and Eastern portion of the County are in the planning stages. It is expected that the Northern Subarea Plan may be approved during the lifetime of the current stormwater permit. While the northern and eastern plans have yet to be approved by the County of San Diego, lands have been and will continue to be acquired from willing sellers.

FY 2007-08 ACTIVITY IMPLEMENTATION During the FY 2007-08 reporting period the County of San Diego purchased 142.9 acres of property located in the San Luis Rey River watershed.

FY 2008-09 ACTIVITY IMPLEMENTATION During the FY 2008-09 reporting period the County of San Diego purchased 77.73 acres of property located in the San Luis Rey River watershed.

FY 2009-10 ACTIVITY IMPLEMENTATION During the FY 2009-10 reporting period the County of San Diego purchased 167.1 acres of property located in the San Luis Rey River watershed. The current acquisitions are shown in the table below.

SLR-012 Land Acquisitions Page 1 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-012

Property Acres Date Watershed ID APN(s)

Vessels Open Space 69.6 8/27/2009 903.12 124-150-30, -31 Addition SLR

Bonsall Land Group SLR 97.5 10/20/2009 903.12 126-060-80, -81

TOTAL 167.1

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

TIME SCHEDULE FOR IMPLEMENTATION The County of San Diego acquires land on an ongoing basis from willing sellers.

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • U.S. Fish and Wildlife Service • California Department of Fish and Game • Private land owners • Conservation groups • Community planning groups • Developers

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • All

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Land acquisition is consistent with the collective watershed strategy in that is averts development, thereby eliminating the possibility of future sources in need of abatement or future pollution loads in need of reduction.

EFFECTIVENESS ASSESSMENT During the FY 2009-10 reporting period the County of San Diego acquired 167.1 acres in the San Luis Rey River watershed. Over the past three fiscal periods the County has acquired a total of 387.76 acres in the San Luis Rey River watershed. These land acquisitions will provide a significant water quality benefit, preclude development from occurring, and allow land to retain its natural perviousness.

SLR-012 Land Acquisitions Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-013

WATERSHED ACTIVITY IMPLEMENTATION SUMMARY SHEET Water Quality Activity

TITLE: Harbor Boat Wash Security Camera ID NUMBER: SLR-013

To address illegal dumping/illegal use of the sewage dump station and boat wash area, a security camera was installed. The intent of the camera was to use it in coordination with public notification of improper use. Once a report of illegal use was filed, the City of Oceanside Department of Harbor and Beaches, Harbor Police, or the Clean Water Program would be able to reference the historical footage and view a license plate number to pursue possible enforcement actions. The digital video is stored for two weeks before being overwritten.

ACTIVITY IMPLEMENTATION FY 2008-09 During the 2008-09 fiscal year, the City of Oceanside Beaches and Harbors Department installed a camera to view the boat wash and RV dump stations at Oceanside Harbor. The camera was installed on the storage facility next to the boat wash. Harbor Police, Harbor Maintenance, and Harbor Administration have access to all of the cameras around the Harbor. In addition, access to live and recorded views from the boat wash camera was installed on the desktop of Clean Water Program personnel.

ACTIVITY IMPLEMENTATION FY 2009-10 No changes to the camera nor additional signage was added during the 2009-10 fiscal year.

TMDL APPLICABILITY N/A

TIME SCHEDULE FOR IMPLEMENTATION Installation occurred in October 2008. Maintenance of the cameras is ongoing.

PARTICIPATING WATERSHED COPERMITTEES N/A

OTHER PARTICIPATING ENTITIES N/A

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria

SLR-013 Harbor Boat Wash Security Camera Page 1 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-013

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The source of the bacteria has been characterized. The City is moving forward with implementing several pilot programs, including the surveillance camera, to determine the BMP, or combination of BMPs, that will be most effective in reducing bacterial exceedances from this outfall.

EFFECTIVENESS MEASUREMENTS In 2008-09, no reports of potential misuse of the boat wash area were reported to the Clean Water Program. The Harbor Police did attempt to use the video from the cameras for a few of their illegal dumping reports, but the quality of the picture was not clear enough to be helpful.

In using the camera during the previous fiscal year, it was assessed that the quality of the video from the camera is not sufficient to create enforcement actions. Both the quality and insufficient night-time lighting reduce the effectiveness of the camera. There were no reports of use of the original camera during this fiscal year. In addition, funding for a camera using newer technology was not approved during the 2009-10 fiscal year.

The assessment of the current camera has shown that the camera has not been effective at changing behavior or enabling enforcement actions and thus reducing spills at this site. It had been anticipated that for those offenders that misused the area, enforcement actions would have changed their behavior as many visitors to the Harbor use the area frequently.

It is recommended that this activity be discontinued until funding for a camera or other technology is available.

SLR-013 Harbor Boat Wash Security Camera Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-014

WATERSHED ACTIVITY IMPLEMENTATION SUMMARY SHEET Water Quality Activity

TITLE: Harbor Boat Wash Coin Operated Water Dispenser ID NUMBER: SLR-014

ACTIVITY DESCRIPTION Oceanside Harbor offers the use of a boat launch ramp free of charge, as well as free use of a boat wash area and a recreation vehicle (RV) sewage dump station. Runoff from the boat wash area drains through the storm drain system and flows to the harbor a short distance away. This storm drain has had historical bacterial exceedances possibly due to improper use of the dump station and/or regrowth in the storm drain itself. Several bacteria reduction pilot projects have been implemented in the past four years to reduce not only bacteria, but also oil and grease and sediment from flowing to the harbor. During the most recent pilot project, the installation and operation of a modular wetland to treat boat wash runoff, excessive use of the free water provided at the boat wash was observed. Not only are summer, high-use flows greater than what the installed BMP can handle to effectively treat the runoff, but with an impending drought, water conservation efforts are not being enforced.

To address water quality and water conservation needs, the City of Oceanside’s Department of Harbor and Beaches is investigating the installation of coin-operated machines that dispense water for use at the wash area. It is anticipated that this will encourage users to use the water they are paying for more wisely and reduce the amount of water wasted. This will, in turn, reduce the amount of water flowing into the harbor which is expected to reduce the bacterial loading at this site.

ACTIVITY IMPLEMENTATION FY 2009-10 During the 2009-10 fiscal year, the Clean Water Program and Harbor Administration staff researched vendor alternatives for coin-operated water dispensers. A vendor with previous work in California state parks was identified. The plan to install coin-operated water dispensers was presented to the Oceanside Harbor and Beaches Advisory Committee in May 2010.

TMDL APPLICABILITY N/A

TIME SCHEDULE FOR IMPLEMENTATION In July and August of 2010, the infrastructure for the coin-operated system was installed with the exception of the coin boxes. The switch from free water to a pay-per use system must be approved by the Harbor and Beaches Advisory Committee and the City Council. It is expected to be presented to the Harbor and Beaches Advisory Committee in January 2011. Approval and implementation are expected by the end of FY 2010-11.

PARTICIPATING WATERSHED COPERMITTEES N/A

SLR-014 Harbor Boat Wash Coin Operated Water Dispenser Page 1 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-014

OTHER PARTICIPATING ENTITIES N/A

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria

EFFECTIVENESS MEASUREMENTS It is anticipated that the installation of coin-operated water dispensers at the Harbor boat wash will encourage users to use the water they are paying for more wisely and reduce the amount of water wasted, resulting in a Level 3 Effectiveness Assessment outcome, behavioral changes. This will, in turn, reduce the amount of water flowing into the Harbor which is expected to reduce the bacterial loading at this site, resulting in a Level 4 Effectiveness Assessment outcome, load reductions.

To track the amount of water being used at the Harbor boat wash area, the water meter for the spigots has been isolated. This will allow a comparison for water use before and after installation. Water quality monitoring at this site will continue under the Coastal Storm Drain Monitoring Program at the boat wash outfall under the program’s requirements. Because high use flows bypass the treatment BMP and are isolated events, exact load reductions will not likely be available. However, depending on the results of the water use, loading estimates may be extrapolated.

SLR-014 Harbor Boat Wash Coin Operated Water Dispenser Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-015

WATERSHED ACTIVITY SUMMARY SHEET Watershed Water Quality and Education Activity

TITLE: Focused Horse Property Outreach in the San Luis Rey River Watershed 1 ID NUMBER: SLR-015

ACTIVITY DESCRIPTION The San Luis Rey Watershed contains many properties with commercial or residential horse operations. Horse operations are a potential source of nutrients, bacteria, and sediment. To reduce the likelihood of impacts on beneficial uses in the San Luis Rey Watershed, the County of San Diego and the City of Oceanside will implement a program to educate horse owners and ranch operators regarding proper manure and corral management through focused outreach and implementation of best management practices (BMPs). The program will consist of a variety of activities, including staffing booths at public outreach events, conducting workshops targeting horse owners, and establishing a pilot program that encourages and facilitates BMP implementation on horse properties through BMP demonstrations and peer mentoring.

Workshops will focus on various topics of relevance to owners and operators of horse facilities, including manure composting and management, and property and corral management. Educational materials, including “how-to” information, instructions on the construction of manure composting bins, and facility checklists to assess current practices will be developed and distributed at the workshops. Workshops may also include demonstration sites, where attendees can observe BMPs in action.

The County of San Diego and City of Oceanside will also conduct a pilot program that seeks to convene a group of peer mentors committed to improving horse property management through the implementation of BMPs and horse owner outreach. If this program is successful, it may be expanded to other communities in the region that have significant horse populations.

ACTIVITY IMPLEMENTATION FY 2008-09 • County staff initiated creation of a booth display to share information about proper manure management practices and photographic examples of successful implementation of BMPs. This display will accompany staff at outreach events and presentations. • County staff initiated creation of a binder of information and resources pertaining to effective manure management practices and photographic examples of BMPs. This folder is displayed at events and outreach presentations. • County and Oceanside staff initiated contact with interested parties to inquire about participation in the peer mentoring component of this activity and to arrange a coordination meeting. • County and Oceanside staff developed a timeline and activities for implementation during FY 2009-10.

1 Activity was previously named SLR-015: Community-based Social Marketing Residential Horse Property Pilot Project

SLR-015 Focused Horse Property Outreach in the San Luis Rey River Watershed Page 1 of 4 FY 2009-10 Activity Implementation Summary Sheet SLR-015

ACTIVITY IMPLEMENTATION FY 2009-10 • During FY 2009-10, The County of San Diego, in coordination with the Solana Center for Environmental Innovation (Solana Center) and the Mission Resource Conservation District (MRCD), conducted workshops targeting equestrians throughout the County unincorporated areas. Training provided in these workshops covered a variety of topics including: o Manure management and composting basics o Prevention of odors and flies o Benefits of composting o Application of compost to gardens and landscapes o Land use regulations o Protection of local water sources.

A workshop was conducted in the Fallbrook area on February 3, 2010. Twenty-two participants attended the workshop, which included presentation of BMPs, a manure composting demonstration, and corral management practices. Assessment was conducted in the form of pre- and post-workshop surveys.

• County staff also hosted equestrian themed public outreach and education booths at the following events: o Bonsall Country Festival (10/10/2009) o Valley Center Rodeo Days (5/28/2010-5/29/2010)

• Staff developed educational materials and outreach tools for use at equestrian event presentations and booth displays. These included: o Two “life-size” horse cut outs o Development of an Equestrian Resource Sheet o Manure composting information materials o Coloring sheet o Additional materials focused on BMPs for manure management

• In order to promote knowledge, awareness, and proper manure management among horse owners in the unincorporated areas, the County contracted Action Research, Inc. to conduct community based social marketing (CBSM) research to: 1) identify the specific manure management actions currently taken by horse owners, and 2) identify the barriers and benefits to proper manure management. Research included in-person interviews with horse owners in the unincorporated communities of Lakeside and Ramona. Intercept interviews were conducted at four retail outlets (feed stores) to reach a diverse set of horse owners. Interviews took place between June 16 and June 27, 2010. A total of 96 horse owners were interviewed. The results of these interviews were summarized in a final report that contains key findings and recommendations for future outreach and program development (Attachment A).

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

SLR-015 Focused Horse Property Outreach in the San Luis Rey River Watershed Page 2 of 4 FY 2009-10 Activity Implementation Summary Sheet SLR-015

TIME SCHEDULE FOR IMPLEMENTATION Additional equestrian workshops are planned in the Fallbrook area during FY 2010-11 and FY 2011-12. In addition, the County is pursuing a partnership with the San Diego County Equestrian Foundation (SDCEF) to disseminate information about manure management and other BMPs to the equestrian community. The County and Oceanside are pursuing the potential involvement of the SDCEF in the pilot peer mentoring program. Development of such a program in the future is contingent upon identifying a reliable source of funding such as grants. County staff will provide outreach at various SDCEF events during FY 2010-11.

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside • County of San Diego

OTHER PARTICIPATING ENTITIES • Solana Center for Environmental Innovation • Mission Resource Conservation District (MRCD) • San Diego County Equestrian Foundation (SDCEF) • Action Research, Inc.

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Bacteria and nutrients have been identified as priority water quality problems in the San Luis Rey Watershed. Animal facilities have been identified as potential sources of bacteria and nutrients. Since this activity addresses two priority water quality problems and a priority source, it is consistent with the collective watershed strategy.

EXPECTED BENEFITS This program seeks to reduce the impacts of nutrients, bacteria, and sediment by practices related to manure management, composting, and other horse-related BMPs. Additionally, the program anticipates formation of a community of knowledgeable horse enthusiasts that will share what they learn with neighbors and friends in the horse community and beyond. The pilot component of this program could be expanded to other communities in the region that have significant horse or animal populations.

SLR-015 Focused Horse Property Outreach in the San Luis Rey River Watershed Page 3 of 4 FY 2009-10 Activity Implementation Summary Sheet SLR-015

EFFECTIVENESS MEASUREMENTS During the FY 2009-10 reporting period, the following events were assessed using Level 1 Outcomes (Table 1).

Table 1: Effectiveness Measures Planned Tasks Assessment Outcome Horse Facility Checklist Complete Level 1 Manure Composting Information Materials Complete Level 1 Resource Guide for Equestrians Complete Level 1 2 events, Staff Booths at Education and Outreach Events Level 1 (>35 participants) 1 event, Conduct Equestrian Workshops Level 1 (22 participants) Meetings conducted, Development of Equestrian Peer Mentor Program Level 1 development ongoing Completion of Pre and Post Workshop Survey Complete, 96 Level 1 Questionnaire participants.

To assess changes in knowledge and awareness (Level 2 Outcomes) among participants in the County-wide workshops described above, pre- and post-workshop surveys were administered. The results presented here are the cumulative results of all County participants and do not reflect San Luis Rey Watershed participants only.

Pre-workshop survey results were as follows: • 15.2% of participants responded that they live in a watershed. • 43.2% responded that stormwater is not treated. • 10.8% felt that horse manure contributes from “some to a great deal” to water pollution. When asked about what equestrians can do to prevent pollution caused by horse manure, 59.5% of respondents suggested ideas on the pre-workshop survey.

Post-workshop survey results were as follows: • 90% of respondents indicated that they live in a watershed. • 74.2% responded that stormwater is not treated. • 22.8% felt that horse manure contributes from “some to a great deal” to water pollution. • 82.8% suggested ideas of what equestrians can do to prevent pollution caused by horse manure on the post survey.

These survey results indicate a positive increase in knowledge and awareness about how equestrian activities can affect water quality. Results also show that more equestrians were able to identify positive behavioral changes (Level 3 Outcomes) following the workshops.

As additional activities are designed and implemented, other effectiveness measurements may be developed.

SLR-015 Focused Horse Property Outreach in the San Luis Rey River Watershed Page 4 of 4 FY 2009-10 Activity Summary Sheet SLR-016

WATERSHED ACTIVITY SUMMARY SHEET Watershed Water Quality and Education Activity

TITLE: Focused Grove and Nursery Outreach in the San Luis Rey River Watershed ID NUMBER: SLR-016

ACTIVITY DESCRIPTION The San Luis Rey Watershed contains many grove and nursery operations. Groves and nurseries have been shown to be potentially significant sources of nutrients to waterways in surrounding watersheds. To reduce the likelihood of impacts on beneficial uses in the San Luis Rey Watershed, the County of San Diego has contracted with the Mission Resource Conservation District (MRCD) to conduct focused outreach to nurseries and groves in the watershed. These outreach efforts will focus on issues related to water conservation, fertilization techniques, erosion prevention, and best management practices (BMPs) to reduce potential nutrient loads.

Tasks associated with this activity include: • Conduct focused workshops and disseminate updated educational information. • Develop pre- and post-workshop survey questions to assess knowledge of general watershed principles and changes in behaviors resulting from this activity. • Develop and distribute informational materials relating to BMPs for various fertilization methods. • Augment the MRCD’s current Agricultural Water Management Program Irrigation System Evaluation to include evaluation of additional practices with the potential to impact water quality. • Conduct onsite irrigation evaluations and disseminate information about fertilization BMPs and erosion control.

ACTIVITY IMPLEMENTATION FY 2009-10 A workshop targeting agricultural operators was conducted on June 14, 2010 at the Rainbow Grange. Twenty participants attended the workshop. Speakers and presentations featured at the workshop included: • Valerie Mellano, UC Cooperative Extension’s Farm and Home Advisors Office, presented on Rainbow Creek’s Total Maximum Daily Load (TMDL) for Nitrogen and Phosphorous, and the Rainbow Creek Nutrient Reduction Management Plan (NRMP). • Eric Larson, San Diego County Farm Bureau and San Diego Irrigation Lands Group, presented on the Agricultural Discharge Waiver and the formation of agricultural water quality monitoring groups. • A panel was held after the presentations for a question/answer session with the workshop attendees. The panel consisted of: o Pete Peuron, Regional Water Quality Control Board o Dave Seymour, Rainbow Municipal Water District

SLR-015 Focused Grove and Nursery Outreach in the San Luis Rey River Watershed Page 1 of 3 FY 2009-10 Activity Summary Sheet SLR-016

o Eric Larson, San Diego County Farm Bureau and San Diego Irrigation Lands Group o Valerie Mellano (Facilitator), UC Cooperative Extension’s Farm and Home Advisors Office

A postcard announcing the workshop time, location, and topics to be discussed at the workshop was also developed and distributed during this reporting period. Pre- and post-workshop assessment surveys were administered to assess attendees’ knowledge of general watershed principles and changes in behaviors resulting from this activity.

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

TIME SCHEDULE FOR IMPLEMENTATION Additional equestrian workshops are planned in the Fallbrook area during FY 2010-11 and FY 2011-12. Continued development and distribution of informational materials will take place in FY 2010-11. Onsite irrigation evaluations will be scheduled and conducted as needed.

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • Mission Resource Conservation District (MRCD)

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Nutrients have been identified as priority water quality problems in the San Luis Rey Watershed. Nursery and grove operations are potentially significant sources of nutrients. Since this activity addresses a priority water quality problem, it is consistent with the collective watershed strategy.

EXPECTED BENEFITS Groves and nurseries operations have been shown to be potentially significant sources of nutrients to waterways in surrounding watersheds. This program seeks to reduce the impacts of nutrients on the San Luis Rey Watershed by educating nursery and grove operators on issues related to water conservation, fertilization techniques, erosion prevention, and BMPs.

SLR-015 Focused Grove and Nursery Outreach in the San Luis Rey River Watershed Page 2 of 3 FY 2009-10 Activity Summary Sheet SLR-016

EFFECTIVENESS ASSESSMENT Activity effectiveness measurements include assessment of completion of an annual workshop, the number of participants in attendance, the number of materials distributed, and the number of irrigation evaluations conducted (Level 1 Outcomes). Activity effectiveness measures assessed in the FY 2009-10 reporting period include:

Table 1: Effectiveness Measures Planned Tasks Assessment Outcome Conduct Workshop for Grove and Nursery 1 event, 20 participants Level 1 Operators Complete, 10 Pre- Completion of Pre and Post Workshop Surveys surveys, 9 Post- Level 1 surveys

Pre- and post-workshop surveys were distributed to all attendees to assess knowledge of general watershed principles and changes in awareness of proper irrigation and fertilization practices (Level 2 Outcomes). Ten pre-workshop surveys were completed and nine post-workshop surveys were completed. Prior to the workshop only 80 percent of workshop participants knew they lived in a watershed; while after the workshop 100 percent affirmed that they lived within a watershed. This change demonstrates an increase in general watershed knowledge. Additionally the surveys measured an increase in knowledge pertaining to agriculture as a potential pollutant source. Before participating in the workshop survey takers indicated that agricultural activities contributed to water pollution: “a little bit” (20% of respondents), “some” (50% of respondents), and “a great deal” (30% of respondents). After the workshop participants indicated that agriculture contributed to water pollution: “a little bit” (11% of respondents), “some” (33% of respondents), and “a great deal” (55% respondents).

In the future, effectiveness may be assessed by estimating the total amount of nutrients reduction possible through the implementation of irrigation BMPs recommended during irrigation evaluations (Level 4 Outcomes).

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THIS PAGE INTENTIONALLY LEFT BLANK FY 2009-10 Activity Summary Sheet SLR-017

WATERSHED ACTIVITY SUMMARY SHEET Watershed Water Quality and Education Activity

TITLE: Focused Onsite Wastewater System Outreach in the San Luis Rey River Watershed ID NUMBER: SLR-017

ACTIVITY DESCRIPTION The San Luis Rey Watershed contains many rural areas in which property owners utilize onsite wastewater treatment (septic systems). In order to promote the proper care and maintenance of onsite wastewater treatment systems, the County has contracted with the Mission Resource Conservation District (MRCD) to implement an onsite wastewater system outreach and rebate program in the San Luis Rey and Santa Margarita River Watersheds. Residents interested in obtaining a rebate to offset the cost of pumping out their system will be required to attend an MRCD-facilitated workshop devoted to the proper care and maintenance of onsite wastewater systems. The rebate program will operate on a first come, first served basis offering 30 pumping rebates annually for three years. The rebates will be in the amount of $100.00 and will only be applicable to pumping by permitted septic waste haulers. The MRCD and County staff will administer pre- and post-workshop survey questions to assess knowledge of general watershed principles and changes in awareness of proper onsite wastewater system maintenance.

ACTIVITY IMPLEMENTATION FY 2009-10 • Press Release to local newspapers on Septic Maintenance A news release announcing the Septic System Workshop and Rebate Program was submitted to three local newspapers: the North County Times , the San Diego Union Tribune , and the Fallbrook/Bonsall Village News . The Fallbrook/Bonsall Village News published the press release in its entirety. • Septic System Workshop and Rebate Program A public workshop focusing on septic tank awareness and proper maintenance procedures was conducted on May 20, 2010, at the Rainbow Grange. A total of ten residents attended the workshop. Eric Klein, County of San Diego Department of Environmental Health, was the featured presenter. The presentation included a detailed description of the components of a septic system and appropriate preventative maintenance measures for proper septic system functioning. The workshop also featured an open question and answer forum, during which the speaker answered specific questions from the attendees. Participants were asked to complete a pre- and post-workshop questionnaire to assess workshop effectiveness. By completing the workshop, residents were eligible to receive a rebate to offset the cost of pumping out their system. Three rebate certificates were distributed at this workshop.

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

SLR-017 Focused Onsite Wastewater System Outreach in the San Luis Rey River Watershed Page 1 of 3 FY 2009-10 Activity Summary Sheet SLR-017

TIME SCHEDULE FOR IMPLEMENTATION An additional workshop is planned for implementation in FY 2010-11.

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • Mission Resource Conservation District (MRCD)

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Bacteria and nutrients have been identified as priority water quality problems in the San Luis Rey Watershed. Onsite wastewater treatment systems have the potential to be significant sources of bacteria and nutrients. Since this activity addresses two priority water quality problems, it is consistent with the collective watershed strategy.

EXPECTED BENEFITS This program will provide homeowners with an economic incentive to maintain their onsite wastewater treatment systems, while educating them on the proper care and maintenance protocol. Through incentives and education, this program seeks to decrease the likelihood of onsite wastewater system failure.

EFFECTIVENESS ASSESSMENT Activity effectiveness is assessed by tracking the number of workshops conducted, the number of participants in attendance, and the number of pumping vouchers distributed (Level 1 Outcomes).

Attendees were asked to complete a pre- and post-workshop survey to assess knowledge of general watershed principles and changes in awareness of proper onsite wastewater system maintenance (Level 2 Outcomes). While pre-workshop surveys were distributed to all workshop participants, none were completed. Eight post-workshop surveys were completed. Post-workshop survey respondents were able to identify at least six BMP for maintaining a healthy septic system and were able to identify five signs of a failed septic system.

Three pumping vouchers were distributed at the workshop, indicating a small-scale behavioral change (Level 3 Outcomes).

Finally, the amount of sewage removed from onsite wastewater systems will be tabulated (pumping volume, estimated percent solids, and location). From this information, some estimates of load reduction may be possible (Level 4 Outcome).

SLR-017 Focused Onsite Wastewater System Outreach in the San Luis Rey River Watershed Page 2 of 3 FY 2009-10 Activity Summary Sheet SLR-017

Table 1: Effectiveness Measures

Task Level Assessment Measures Effectiveness Measure

Septic Outreach Workshop 1 Complete annual workshop Workshop completed 1 Number of attendees 10 workshop attendees 2 Pre/Post-Workshop Survey 0 pre-workshop surveys Questionnaire completed* 8 post-workshop surveys completed Septic System Rebate 1 Number of vouchers 3 vouchers distributed** Program distributed 3 Number of vouchers used 0 vouchers used 4 Volume of sewage removed N/A

(percent solids) *Pre-workshop surveys were distributed to all participants, but no surveys were completed. ** Workshop included San Luis Rey River Watershed and Santa Margarita River Watershed participants. A total of three vouchers were distributed to all participants.

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THIS PAGE INTENTIONALLY LEFT BLANK FY 2009-10 Proposed Activity Summary Sheet SLR-018

PROPOSED WATERSHED ACTIVITY SUMMARY SHEET Watershed Education Activity

TITLE: Guajome Sports Park Watershed Educational Signage ID NUMBER: SLR-018

ACTIVITY DESCRIPTION A new City Park was recently constructed that includes sports fields and walking trails. The Park is situated high atop a hillside in the San Luis Rey Hydrologic Unit, providing spectacular views of the San Luis Rey River corridor and watershed. The Park is expected to draw many visitors and will provide a great opportunity for educating the public on the physical features of the watershed and the water quality issues within. This activity will provide for design and installation of watershed educational signage at various locations in the sports park. The signage will address the physical features in the watershed, water quality problems identified in the watershed, and provide tips that the residents can use to improve conditions in the watershed through their daily activities and interactions.

TMDL APPLICABILITY The only TMDL adopted in the watershed is the Bacteria Project I for Beaches and Creeks. This TMDL is for bacteria and addresses the impaired segment of the Pacific Ocean listed at the San Luis Rey River mouth. The educational signage in the park will address sources of bacteria and solutions to bacteria problems.

TIME SCHEDULE FOR IMPLEMENTATION • FY 2010-11 Sign Design and Installation • FY 2011-12 Effectiveness Assessment

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside • City of Vista • County of San Diego

OTHER PARTICIPATING ENTITIES N/A

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria • Nutrients

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The San Luis Rey HU collective watershed strategy identifies bacteria and nutrients as high priority water quality pollutants in the watershed. Potential sources of bacteria and nutrients have been identified within the watershed and include industrial/commercial, residential, and open space land uses. This activity addresses both high priority water quality problems and

SLR-018 Guajome Sports Park Watershed Educational Signage Page 1 of 2 FY 2009-10 Proposed Activity Summary Sheet SLR-018 primarily will address potential sources of the problem related to residential activities within the watershed; therefore the activity is consistent with the Carlsbad WMA Strategy.

EXPECTED BENEFITS It is expected that through the educational information presented on the signage, the residents will improve their knowledge related to stormwater and urban runoff and implement appropriate BMPs in their everyday activities affecting water quality.

EFFECTIVENESS MEASUREMENTS The effectiveness assessment of the project has not been completely developed at this time. At a minimum level 1 will be assessed via installation of the signs. Additionally, estimates of numbers of visitors may be used to measure the impressions made by the signs. This may allow for some measure of knowledge change (level 2); however measuring of actual changes in behavior related to the signage will be difficult to assess (level 3) and may not be feasible.

SLR-018 Guajome Sports Park Watershed Educational Signage Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-019

WATERSHED ACTIVITY SUMMARY SHEET Watershed Education Activity

TITLE: Hellhole Canyon County Park Educational Signage ID #: SLR-019

ACTIVITY DESCRIPTION Hellhole Canyon County Preserve is a 1,907 acre preserve located near Valley Center in the San Luis Rey River watershed. The area offers 13.5 miles of public access trails, as well as campsites, an amphitheatre, and an equestrian staging area. In January of 2010 three interpretive signs were installed in the interior of the Hellhole Canyon County Preserve to help educate visitors about watershed themed messages. The signs include a focus on three primary topics: • What Is A Watershed? – a description of what a watershed is and a map of the San Luis Rey River watershed boundaries. This educational signage also contains BMPs for maintaining a healthy watershed, including messages on reducing pesticide use, proper disposal of household hazardous waste, and ways to prevent runoff pollution. • Wildlife Linkages – a description of the habitats located within the preserve and four species associated with them. These four species are the mountain lion, coyote, mule deer, and bobcat. • The Escondido Flume – an outline of the history of the Escondido Flume, which diverts water from the San Luis Rey River watershed into Lake Wohlford (located in the Carlsbad Hydrologic Unit Watershed).

FY 2009-10 ACTIVITY IMPLEMENTATION Interpretive educational sign development and installation was completed in January of 2010.

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

TIME SCHEDULE FOR IMPLEMENTATION No further implementation actions are planned for this activity.

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • None

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Bacteria • Nutrients

SLR-019 Hellhole Canyon County Park Educational Signage Page 1 of 2

FY 2009-10 Activity Implementation Summary Sheet SLR-019

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY This activity is consistent with the collective watershed strategy in that nutrients and bacteria are identified as a high priority water quality problem in the San Luis Rey River watershed (HU 903) and this activity is aimed at abating sources in the watershed.

EFFECTIVENESS ASSESSMENT Activity effectiveness was measured by the completion of development and installation activities (Level 1). These goals were achieved and no further effectiveness assessment measures are planned at this time.

SLR-019 Hellhole Canyon County Park Educational Signage Page 2 of 2

FY 2009-10 Activity Summary Sheet SLR-020

WATERSHED ACTIVITY SUMMARY SHEET Watershed Water Quality and Education Activity

TITLE: Residential Composting Workshop ID NUMBER: SLR-020

ACTIVITY IMPLEMENTATION Residents from the San Luis Rey and Carlsbad watersheds will be invited to attend a free composting workshop to be held during fiscal year 2010-11. This workshop will provide an overview of composting, hands-on demonstrations on how to compost, proper application of compost, and the benefits of compost to soil and water quality.

Topics to be covered during the workshop are as follows: • Static Composting • Active Composting • Vermicomposting (worm composting) • Compostable materials • Composting bins and tools • Applying compost in landscapes and gardens • How compost benefits soil and protects water quality • Reduction of waste being land filled

Potential speakers for the workshop and their specific topics include: • Cynthia Mallett – City of Oceanside: Composting Overview • Shamsa Visone– Solana Center for Environmental Innovation: Composting Techniques • Mary Matava – Agri-Service: technical information about how compost protects water quality be improving soil

TMDL APPLICABILITY This activity is not planned for implementation in compliance with a TMDL.

TIME SCHEDULE FOR IMPLEMENTATION This workshop is scheduled for implementation in Spring 2011.

PARTICIPATING WATERSHED COPERMITTEES • City of Oceanside • City of Vista • County of San Diego

OTHER PARTICIPATING ENTITIES • Solana Center for Environmental Innovation • Agri-Service

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Nutrients

SLR-020 Residential Composting Workshop Page 1 of 2 FY 2009-10 Activity Summary Sheet SLR-020

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY The San Luis Rey River Watershed strategy identifies nutrients as high priority water quality pollutants in various hydrologic areas throughout the watershed. The use of chemical fertilizers has been identified as a potential source of eutrophication in local water bodies. Using compost as a natural fertilizer will reduce the amount of chemical fertilizer that resident use in their landscapes. It also reduces the need for pesticides. Also, erosion and sedimentation can be reduced through the proper application of compost. This activity addresses high priority water quality problems and potential sources of the problems within the watershed. Therefore the activity is consistent with the San Luis Rey WMA strategy.

EXPECTED BENEFITS Expected benefits included educating residents about how to compost and providing them with information and tools to incorporate composting into their daily lives. Getting residents to actually compost and utilize the soil in their landscapes will help reduce pollutants from entering our local water bodies.

EFFECTIVENESS ASSESSMENT A pre- and post-test will be administered at the workshop. Attendees will be asked to complete the same set of questions before the workshop begins and after the completion of the workshop. This will help determine the effectiveness of the speakers in improving attendees’ knowledge of composting and applying compost in landscapes. Questions will also be asked to determine barriers to composting. (Level 2).

RECOMMENDATIONS Depending on the success of this workshop, future workshops may be implemented.

SLR-020 Residential Composting Workshop Page 2 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-021

WATERSHED ACTIVITY SUMMARY SHEET Water Quality Activity

TITLE: Fallbrook Community Center Artificial Turf ID #: SLR-021

ACTIVITY DESCRIPTION The County of San Diego has converted 7,200 square feet of turf planters to artificial turf at the Fallbrook Community Center facility. This project included the capping of existing irrigation lines throughout three planters, with the exception of a single bubbler unit used to irrigate a pine tree. A French drain system and gravel bed system was installed beneath the planters to help protect against the unlikely occurrence of runoff due to over-saturation during large storm events.

The installation of the artificial turf is estimated to reduce the application of fertilizer by as much as 120 pounds per year and annual water consumption by nearly 170,000 gallons.

This activity directly benefits the watershed by reducing the need for irrigation of turf planters, increasing storm water filtration, and decreasing the potential of nutrient loading to the watershed.

ACTIVITY IMPLEMENTATION FY 2009-10 During the FY 2009-10 over 7,200 square feet of natural turf was removed and replaced with artificial turf (see attached figure). This activity included excavating to a depth of 3 inches, installing a French drain system below the surface, backfilling with decomposed granite (DG), and compressing the DG to a 90% compaction rate.

TMDL APPLICABILITY N While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

TIME SCHEDULE FOR IMPLEMENTATION • Future artificial turf installation was planned for FY 2010-11, but has been placed on hold due to budgetary constraints.

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego

OTHER PARTICIPATING ENTITIES • None

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • Nutrients

SLR-021 Fallbrook Community Center Artificial Turf Page 1 of 3 FY 2009-10 Activity Implementation Summary Sheet SLR-021

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY This activity demonstrates reduced pollutant loads and source abatement which benefits the receiving water quality. Since this activity addresses priority water quality problems it is consistent with the collective watershed strategy.

EFFECTIVENESS ASSESSMENT Activity effectiveness was measured by confirming completion of all project elements (Level 1 Outcome) during FY 2009-10. Irrigation water use at the facility has decreased approximately 18% based on comparison of pre- and post-installation assessments. Turf nutrient fertilizer applied to community center landscaping has decreased by 120 lbs, or 25%, since the installation of artificial turf. The reduction in irrigation volume and the decrease in the amount of nutrients applied result in a maximum potential load reduction of up to 120 lbs of nutrients from the watershed (Level 4 Outcome).

SLR-021 Fallbrook Community Center Artificial Turf Page 2 of 3 FY 2009-10 Activity Implementation Summary Sheet SLR-021

Natural Turf N

Artificial Turf Natural Turf

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THIS PAGE INTENTIONALLY LEFT BLANK FY 2009-10 Activity Implementation Summary Sheet SLR-022

WATERSHED ACTIVITY SUMMARY SHEET Watershed Water Quality and Education Activity

TITLE: Residential Rain Barrel Subsidies & Distribution ID NUMBER: SLR-022

ACTIVITY DESCRIPTION The County of San Diego will implement a rain barrel subsidy and distribution program targeting residents throughout the County. Rain barrel use will be encouraged through a subsidy eligible to residents of unincorporated areas, but residents of incorporated cities will also be able to purchase rain barrels at an affordable price. In addition to distribution of rain barrels, the program will promote outdoor water conservation and runoff reduction through public outreach before and during rain barrel distribution events.

Use of rain barrels can provide many benefits including reduced reliance on potable water through the storage and use of rain water for irrigation. For example, one inch of rain falling on a 1,000 square foot roof can harvest 600 gallons of rainwater. Retention and use of rain water onsite reduces the overall loading of pollutants leaving properties and entering the stormwater system. By implementing a rain barrel system, residents can: • Reduce water pollution as a result of rainwater runoff, which carries pesticides, fertilizers, sediment, oil, and trash into local rivers and lakes. • Reduce soil erosion and improve the ability of water to infiltrate the soil at a reduced intensity. • Reduce dependency on imported water supplies and realize cost savings as a result of reduced water use. • Help save energy by reducing demand on our drinking water supply.

In addition to the provision of rain barrels, County staff will be present at distribution events to provide educational materials and responses to any questions raised by participants. Residents from multiple watersheds are expected to participate in this regional activity and will be asked to sign a maintenance agreement as a condition of receiving a rain barrel at the subsidized rate.

Follow up surveys will be conducted with participating residents to ensure that rain barrels have been installed and to encourage proper maintenance.

FY 2009-10 ACTIVITY IMPLEMENTATION Activity during FY 2009-10 included conducting research to identify desired rain barrel features, including: size, ease of installation, cost, and features to discourage mosquito breeding. The County solicited bids through a formal procurement process in order to obtain the best quotes for provision of rain barrels and for one-year of customer service assistance following distribution. A vendor was selected, a contract awarded, and planning was initiated for two distribution events to be held during FY 2010-11. In addition, the County used an existing website to provide more information to the public ( www.rethinkwateruse.org ).

SLR-022 Residential Rain Barrel Subsidies & Distribution Page 1 of 2 FY 2009-10 Activity Implementation Summary Sheet SLR-022

TMDL APPLICABILITY While it may be supportive of TMDL goals, this activity is not specifically implemented as part of a TMDL compliance program.

TIME SCHEDULE FOR IMPLEMENTATION Planning for this activity occurred during FY 2009-10. The events are scheduled to occur during FY 2010-11. Depending upon the success of the initial events, additional events will be considered for implementation during FY 2011-12 and FY 2012-13.

PARTICIPATING WATERSHED COPERMITTEES • County of San Diego • San Luis Rey Watershed Council

OTHER PARTICIPATING ENTITIES • N/A

HIGH PRIORITY WATER QUALITY PROBLEM(S) ADDRESSED • All

CONSISTENCY WITH THE COLLECTIVE WATERSHED STRATEGY Rainwater harvesting reduces the overall amount of runoff from individual properties resulting in a decrease in pollutant mobilization and erosion.

EFFECTIVENESS ASSESSMENT Level 1 Outcomes will be assessed based on the number of rain barrels sold to individuals living in the County and through the signing of rain barrel maintenance agreements.

SLR-022 Residential Rain Barrel Subsidies & Distribution Page 2 of 2