PHASE I REPORT

June 2005 Calleguas Creek Watershed Integrated Regional Water Management Plan

This Integrated Regional Water Management Plan (IRWMP) is comprised of two volumes:

Volume I: Calleguas Creek Watershed Management Plan Phase I Report

Volume II: Calleguas Creek Watershed Management Plan Addendum

Volume I is provided as a separate document and Volume II is attached. Volume II is intended to bridge the gap between the Calleguas Creek Watershed Management Plan and the requirements for IRWMPs found in the Integrated Regional Water Management (IRWM) Grant Program Guidelines (Guidelines). The two volumes, together, are intended to be a functionally- equivalent IRWMP document.

The Guidelines were prepared by the California Department of Water Resources (DWR) and the State Water Resources Control Board (SWRCB) in November 2004 to provide guidance on the process and criteria that DWR and SWRCB will use to evaluate grant applications under the IRWM Grant Program. The Grant program resulted from the passage of Proposition 50, the Water Security, Clean Drinking Water, Coastal and Beach Protection Act of 2002. IRWM is discussed in Chapter 8 of Proposition 50.

p:\05\0587108_cmwd_irwmp\attachments\attach3_irwmp\camrosa_only_preface.doc PHASE I REPORT

June 2005 Table of Contents

Table of Contents...... i List of Tables...... iv List of Figures...... iv List of Appendices...... iv List of Abbreviations and Acronyms...... v

Section 1: Introduction ...... 1 1.1 Participating Entities...... 1 1.1.1 Regional Lead Agency ...... 1 1.1.2 Other Participating Agencies...... 3 1.1.3 Stakeholders...... 5 1.1.4 State and Federal Agencies ...... 6 1.2 Objectives ...... 6 1.2.1 Objectives ...... 8 1.2.2 Relation to Statewide Priorities...... 8 1.2.2.1 Reduce the Conflict Between Water Users or Resolve Water Rights Disputes, Including Interregional Water Rights Issues...... 8 1.2.2.2 Implementation of Total Maximum Daily Loads That Are Established or Under Development...... 9 1.2.2.3 Implementation of Regional Water Quality Control Board Watershed Management Initiative Chapters, Plans, and Policies...... 9 1.2.2.4 Meet Delta Water Quality Objectives...... 9 1.2.2.5 Implementation of Recommendations of the Floodplain Management Task Force, Desalination Task Force, or Recycling Task Force...... 9 1.2.2.6 Address Environmental Justice Concerns ...... 10 1.2.2.7 Assist In Achieving One or More Goals of the CALFED Bay-Delta Program ...... 10 1.2.3 Relation to Regional Priorities ...... 10 1.3 Relation to Local Planning...... 11 1.4 Disadvantaged Communities ...... 11 1.5 Potential Obstacles ...... 12

Section 2: Region Description ...... 14 2.1 Region Boundaries...... 14 2.2 Water Related Infrastructure ...... 16 2.3 Land Use...... 18

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2.4 Quantity and Quality of Water Resources in Region...... 18 2.4.1 Water Quantity...... 18 2.4.2 Water Quality...... 19 2.5 Water Supplies...... 21 2.5.1 Imported Water Supplies...... 21 2.5.2 Local Supplies ...... 22 2.6 Water Demand ...... 23 2.7 Environmental Resources ...... 23 2.7.1 Calleguas Creek and its Tributaries ...... 23 2.7.2 Mugu Lagoon...... 23 2.8 Social, Cultural, Economic Conditions and Trends ...... 24

Section 3: Elements of the Plan ...... 25 3.1 Water Management Strategies...... 25 3.2 Integration ...... 31 3.3 Regional Priorities ...... 31 3.4 Implementation...... 32 3.4.1 Project 1. Calleguas Regional Salinity Management Project (Brineline)...... 32 3.4.1.1 Project Description...... 32 3.4.1.2 Relationship to Water Management Strategies...... 33 3.4.1.3 Status and Schedule...... 34 3.4.1.4 Cost ...... 34 3.4.1.5 Integration With Other Projects...... 34 3.4.2 Project 2. Renewable Water Resource Management Program for the Southern Reaches of the Watershed ...... 35 3.4.2.1 Project Description...... 35 3.4.2.2 Relationship to Water Management Strategies...... 38 3.4.2.3 Status and Schedule...... 39 3.4.2.4 Cost ...... 40 3.4.2.5 Integration With Other Projects...... 40 3.4.3 Project 3. Camarillo Groundwater Treatment Facility...... 40 3.4.3.1 Project Description...... 40 3.4.3.2 Relationship to Water Management Strategies...... 41 3.4.3.3 Status and Schedule...... 42 3.4.3.4 Cost ...... 42 3.4.3.5 Integration With Other Projects...... 42 3.4.4 Project 4. South Las Posas Basin Regional Desalter...... 42 3.4.4.1 Project Description...... 42 3.4.4.2 Relationship to Water Management Strategies...... 42 3.4.4.3 Status and Schedule...... 43 3.4.4.4 Cost ...... 43

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3.4.4.5 Integration With Other Projects...... 43 3.4.5 Project 5. Somis Desalter...... 43 3.4.5.1 Project Description...... 43 3.4.5.2 Relationship to Water Management Strategies...... 44 3.4.5.3 Status and Schedule...... 44 3.4.5.4 Cost ...... 45 3.4.5.5 Integration With Other Projects...... 45 3.4.6 Project 6. West Simi Desalter...... 45 3.4.6.1 Project Description...... 45 3.4.6.2 Relationship to Water Management Strategies...... 45 3.4.6.3 Status and Schedule...... 46 3.4.6.4 Cost ...... 46 3.4.6.5 Integration With Other Projects...... 46 3.4.7 Project 7. VCWWD1 Expansion of Reclaimed Water Distribution System...... 46 3.4.7.1 Project Description...... 46 3.4.7.2 Relationship to Water Management Strategies...... 47 3.4.7.3 Status and Schedule...... 47 3.4.7.4 Cost ...... 48 3.4.7.5 Integration With Other Projects...... 48 3.4.8 Project 8. Simi Valley Regional Recycled Water System ...... 48 3.4.8.1 Project Description...... 48 3.4.8.2 Relationship to Water Management Strategies...... 49 3.4.8.3 Status and Schedule...... 49 3.4.8.4 Cost ...... 49 3.4.8.5 Integration With Other Projects...... 49 3.4.9 Project 9. Conejo Creek North Fork - Wildwood Park Water Management Enhancement Project...... 49 3.4.9.1 Project Description...... 50 3.4.9.2 Relationship to Water Management Strategies...... 51 3.4.9.3 Status and Schedule...... 52 3.4.9.4 Cost ...... 52 3.4.9.5 Integration With Other Projects...... 52 3.4.10 Project 10. Calleguas Creek Watershed Arundo/Tamarisk Programmatic EIR/EA, Permits and Pilot Removal Project ...... 52 3.4.10.1 Project Description...... 52 3.4.10.2 Relationship to Water Management Strategies...... 53 3.4.10.3 Status and Schedule...... 54 3.4.10.4 Cost ...... 54 3.4.10.5 Integration With Other Projects...... 54

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3.5 Impacts and Benefits...... 54 3.6 Technical Analysis and Performance...... 55 3.6.1 Water Quality Monitoring Plan...... 55 3.6.2 Measurement of Increase in Use of Local Water Resource ...... 56 3.6.3 Quantification of Water Made Available for Beneficial Use in Habitat Restoration or Agriculture Monitoring Plan ...... 56 3.6.4 Documentation of Community Outreach Activities ...... 57 3.6.5 Implementation Schedule Summary...... 57 3.7 Data Management...... 57 3.8 Financing...... 59

Section 4: Relationship to Clean Water Act Section 319 (h) Watershed Management Plan Elements ...... 60

References...... 62

List of Tables

Table 1: Participating Agencies Table 2: History of CCWMP Committee Meetings to Date Table 3: Calleguas Creek Watershed TMDL Summary Table 4: Additional Small Water Purveyors Within Region Table 5: CCWMP Short- and Long-Term Action Recommendation and Relationships to Water Management Strategies and Regional Priorities Table 6: IRWMP Proposed Project Summary Table 7: IRWMP Proposed Project Relationship to Water Management Strategies, IRWMP, CCWMP Objectives, and Other Priorities and Objectives

List of Figures

Figure 1: Calleguas Creek Watershed Figure 2: Calleguas Water Purveyors Figure 3: Calleguas Creek and Tributaries Figure 4: Major Water Facilities Figure 5: FCGMA and Groundwater Basin Boundaries Figure 6: IRWMP Project Locations

List of Appendices

Appendix A Adoption Resolutions

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List of Abbreviations and Acronyms

Abbreviation / Definition Acronym AF acre-feet AFY acre-feet per year ASR aquifer storage and recovery Brineline Calleguas Regional Salinity Management Project Calleguas Calleguas Municipal Water District Camrosa Camrosa Water District CCDs census county divisions CCWMP Calleguas Creek Watershed Management Plan CEQA California Environmental Quality Act cfs cubic feet per second CRPD Conejo Recreation and Park District EPA U.S. Environmental Protection Agency FCGMA Fox Canyon Groundwater Management Agency FY fiscal year GAMAP Groundwater Ambient Monitoring and Assessment Program GIS Geographic Information System Guidelines Integrated Regional Water Management Grant Program Guidelines IRP Integrated Resources Plan IRWMP Integrated Regional Water Management Plan LF linear foot MRCA Mountains Recreation and Conservation Authority MWTP Moorpark Wastewater Treatment Plant mg million gallons mgd million gallons per day mg/l milligrams per liter MHI median household income Metropolitan Metropolitan Water District of Southern California

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Abbreviation / Definition Acronym MWTP Moorpark Wastewater Treatment Plant NPDES National Pollutant Discharge Elimination System NPS Non Point Source OSPN Open Space Planning Network R/D Retention and Detention RO reverse osmosis RWRMP Renewable Water Resource Management Program RWQCB Regional Water Quality Control Board SCAG Southern California Association of Governments SSOs site-specific objectives SVWQCP Simi Valley Water Quality Control Plant SWAMP Surface Water Ambient Monitoring Program SWP State Water Project SWRCB State Water Resources Control Board TDS Total Dissolved Solids TMDLs Total Maximum Daily Loads VCRCD Ventura County Resource Conservation District VCWPD Ventura County Watershed Protection District VCWWD1 Ventura County Waterworks District No. 1 VCWWD19 Ventura County Waterworks District No. 19 VCWWD8 Ventura County Waterworks District No. 8 / City of Simi Valley Watershed Calleguas Creek Watershed Wildwood Conejo Creek North Fork - Wildwood Park Water Management Project Enhancement Project WMI Watershed Management Initiative WQO Water Quality Objectives WTP Water Treatment Plant WWTPs Wastewater Treatment Plants

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Section 1: Introduction

The Calleguas Creek Watershed (Watershed) management, agricultural, land use, and encompasses an area of approximately 343 public outreach and education. square miles, predominantly in southern Ventura County as shown on Figure 1. The Although the CCWMP is a comprehensive, Watershed includes Conejo Creek, Arroyo integrated approach to management of the Santa Rosa, Arroyo Simi, Arroyo Las Posas, Watershed, it falls just short of being a and Calleguas Creek, as well as Revolon complete Integrated Regional Water Slough and Mugu Lagoon. The northern Management Plan (IRWMP). This Addendum boundary is formed by the Santa Susana has been developed to bridge the gap Mountains, South Mountain, and Oak Ridge between the existing CCWMP and the Mountains. The southern boundary is requirements of an IRWMP. It incorporates distinguished by the Simi Hills and Santa all of the information required by the Monica Mountains. Presently 50 percent of Integrated Regional Water Management the Watershed is undeveloped open space, Grant Program Guidelines (Guidelines) 25 percent is agricultural, and the remaining identified in the Proposition 50 Chapter 8 25 percent is in urban land use. The Implementation Grant Proposal Solicitation Watershed ultimately drains to the Pacific Package. Ocean through Mugu Lagoon.

Prior to the 1940s, Calleguas Creek and its 1.1 Participating Entities main tributaries provided drainage for A number of entities are participating in this stormwater and irrigation discharge, with rare IRWMP, including Calleguas Municipal Water occurrences of year-round flow. However, District (Calleguas) as the lead agency; other over the past 50 years, steadily increasing federal, state, and local agencies; and other wastewater discharges and urban run-off now participants in the Watershed process. These provide portions of Calleguas Creek and its participants are discussed further below. tributaries with constant flow. Their adoption of this IRWMP is documented in Appendix A. Urban development and agricultural activities within the Watershed have resulted in the degradation of water resources, loss of 1.1.1 Regional Lead Agency sensitive ecosystems, floods, and erosion and sedimentation problems. In 1996, a broad Calleguas is a wholesale water agency that coalition of local property owners, water and supplies imported State Water Project (SWP) wastewater agencies, environmental groups, water to over 550,000 residents of Ventura agricultural parties, governmental agencies, County through 22 retail water purveyors. and other private interests joined together to Calleguas’ 350 square mile service area openly develop a management plan for the includes the cities of Moorpark, Simi Valley, Watershed. The Calleguas Creek Watershed Thousand Oaks, Camarillo, Oxnard, and Port Management Plan (CCWMP) was completed Hueneme, as well as surrounding in July 2004 to address the issues impacting unincorporated areas. Figure 2 provides a the Watershed. The CCWMP recommended map of the boundaries of the member 20 action items in the areas of water agencies to Calleguas. resources and water quality, habitat and recreation, flood protection and sediment

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WatershedWater sBoundaryhed Boundary

Hwy 126 Hwy 118

Hwy 34

CMWD Boundary Ventura County Hwy Los Angeles County 1 Hwy 101

CMWD Boundary

Calleguas Creek Watershed

Calleguas Municipal Water District Service Area CCWMP Addendum

Calleguas Creek Watershed Area N Watershed Boundaries June 2005

Prepared by Kennedy/Jenks Consultants, K/J 0587108*00 Figure 1

Calleguas imports about 120,000 acre-feet CCWMP, and Calleguas board (AF) of water annually from the SWP, the representatives and staff are members of future availability of which remains uncertain many of the program’s issue-area given persistent environmental concerns subcommittees. Calleguas is serving as the and varying hydrologic cycles. In light of lead agency on this IRWMP, which is a this, Calleguas and other water purveyors in continuation of the efforts and objectives of the Watershed are taking proactive the CCWMP. measures to implement water supply enhancement projects to maximize beneficial use of local water from the 1.1.2 Other Participating Watershed. Agencies

Calleguas has been an active participant in As the IRWMP consists of the the CCWMP since the program’s inception. implementation of several new projects, Calleguas serves as the program Table 1 provides a list of participating administrator, coordinating the various agencies specific to the IRWMP and their studies conducted in support of the water responsibilities. These entities all participate in the CCWMP.

Table 1: Participating Agencies

Agency Water Responsibilities Calleguas Municipal Water District Lead agency, wholesaler of imported water to Calleguas Creek Watershed City of Camarillo Supplies water to portions of the City of Camarillo City of Simi Valley/Ventura County Waterworks Supplies water to portions of the District No. 8 City of Simi Valley City of Thousand Oaks Supplies water to portions of the City of Thousand Oaks Camrosa Water District Supplies water to portions of the City of Camarillo and unincorporated county areas Ventura County Waterworks District No. 1/ Supplies water to portions of the City of Ventura County Waterworks District No. 19 Moorpark and unincorporated county areas Mountains Recreation and Conservation Conservation of natural resources Authority Ventura County Resource Conservation District Conservation of natural resources

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VCWWD 1* VCWWD 8* Hwy Hwy VCWWD 19 126 118 CVMWC PVMWC SCWC

BMWC CWD* VCWWD 8* Hwy 34 VCWWD 8* City of Camarillo* CalAm City of Thousand Oaks* City of Oxnard NPAMWC RVMWD OPWS MWC

Hwy 1 Hwy 101 LSCSD

ty ty n un Navy Base CMWD ou o C C Ventura County ra es tu el n ng Ve A s Lo

Abbreviations: BMWC Brandeis Mutual Water Company BRMWC Butler Ranch Mutual Water Company Calleguas Creek Watershed CalAm California American Water Company CMWD Calleguas Municipal Water District Indicates Participating Agency CVMWC Crestview Mutual Water Company CCWMP Addendum CWD Camrosa Water District * Indicates wastewater responsibilities MWC Mesa Water Company N Calleguas Water Purveyors LSCSD Lake Sherwood Community Services District NPAMWC Newbury Park Academy Mutual Water Company June 2005 OPWS Oak Park Water Service PVMWC Pleasant Valley Mutual Water Company RVMWD Russell Valley Mutual Water District Figure 2 SCWC Southern California Water Company VCWWD Ventura County Waterworks District Prepared by Kennedy/Jenks Consultants, K/J 0587108*00

„ Rancho Simi Recreation and Park District 1.1.3 Stakeholders The CCWMP has been prepared through a Business Organizations collaborative process of many agencies and organizations with a vested interest in „ Business Industry Association improving water quality, flood control, and „ Ventura County Economic Development habitat within the Watershed. These many Association participants are listed below and include the Regulatory Agencies agencies of the IRWMP. Because the general purpose of this Addendum is to „ Regional Water Quality Control Board – bridge the gap between the CCWMP and the Los Angeles Guidelines, the two plans share the same „ California Coastal Commission stakeholders, and issues of concern for the „ California Department of Fish and Game IRWMP can and will be discussed during the „ Fox Canyon Groundwater Management Stakeholder Committee meetings. Support Agency for the CCWMP by the stakeholders can be „ U.S. Army Corps of Engineers extended to this IRWMP. „ U.S. Environmental Protection Agency „ U.S. Fish and Wildlife Service The following provides a list of all participating agencies and organizations: Other Agencies/Organizations General Purpose Agencies „ Navy Base Ventura County – Point Mugu „ Ventura County Resource Conservation „ City of Camarillo District „ City of Moorpark „ California Coastal Conservancy „ City of Simi Valley „ California Department of Water „ City of Thousand Oaks Resources „ Ventura County Watershed Protection „ California Native Plant Society District „ California Wildlife Conservation Board Water Suppliers/Wastewater Management „ Environmental Defense Center „ Natural Resources Conservation Service „ Calleguas Municipal Water District „ Santa Monica Mountains Conservancy „ Camrosa Water District „ Surfrider Foundation „ Pleasant Valley County Water District „ Caltrans „ United Water Conservation District Stakeholder committee and subcommittee „ Ventura County Waterworks Districts meetings are held on a regular basis (roughly „ Zone Mutual Water Company monthly or quarterly) to allow discussion of Recreational and Open Space Entities issues facing the Watershed, including those of the IRWMP. These meetings are open to „ California Department of Parks and the public and all other interested parties. Recreation Table 2 summarizes the history of the „ Santa Monica Mountains Recreation and committee meetings to date. Copies of the Conservation Authority meeting minutes from these meetings are „ Conejo Recreation and Parks District provided on the CCWMP website „ Pleasant Valley Park and Recreation (http://www.calleguas.com/ccbrochure/meetld. District html).

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Numerous efforts have been made through website with access to project information, the CCWMP Public Outreach sub-committee and conducting all subcommittee meetings to include and notify the public about all with public attendance. Public outreach aspects of the CCWMP. Public outreach activities are discussed in more detail in activities include developing a brochure Chapter 3 of the CCWMP. summarizing the CCWMP, creating a public Table 2: History of CCWMP Committee Meetings to Date

Approximate Meeting Committee First Meeting Frequency Steering Committee Jan-04 Monthly Water Resources/Water Quality Mar-03 Monthly Flood Protection and Sediment Management Mar-01 Monthly Habitat/Natural Resources and Open Quarterly Space/Recreation Mar-01 Land Use Mar-01 Monthly Public Outreach/Education Jun-01 Quarterly Agriculture Jun-03 Monthly

these projects at the subcommittee 1.1.4 State and Federal meetings. Agencies As shown by the Stakeholder list above, 1.2 Objectives several state and federal regulatory agencies have been involved in the Located in Ventura County within the Los development and implementation of the Angeles Region of the RWQCB, the objectives and projects for the CCWMP, Watershed is a critical water resource for particularly with respect to water quality Southern California. The Watershed has issues and the removal of salts to meet the experienced increasing salinity levels since total maximum daily loads (TMDLs) it was first utilized by local farmers in the established for the Watershed. 1880s. Today, total dissolved solids (TDS) Coordination with state and federal levels often exceed 1,000 milligrams per regulatory agencies is essential to the liter (mg/l), the State Water Resource development and implementation of all the Control Board’s (SWRCB’s) threshold for projects due to the need for regulatory and designating impaired water bodies. In order environmental approval prior to to protect beneficial uses, it is essential that implementation. Because the Regional water resource management projects be Water Quality Control Board (RWQCB) and undertaken to halt the salinity buildup and the U.S. Environmental Protection Agency reduce TDS levels. (EPA) have been involved in the preparation of the CCWMP, coordination regarding the Numerous factors have contributed to IRWMP projects has already begun. increasing salinity levels, including naturally Furthermore, these agencies have had the occurring minerals, agricultural runoff, and chance to address issues of concern on lack of surplus water to flush salts from the environment. Salinity levels have also

Calleguas Creek Watershed Management Plan Addendum 6 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc increased with each cycle of water use. schedules, depending upon funding Groundwater sources have experienced availability, for the other TMDL constituents. increased TDS concentrations as a result of agricultural and urban activities and groundwater overdraft. Groundwater over- Table 3: Calleguas Creek drafting along the coastline has led to Watershed TMDL seawater intrusion into coastal groundwater Summary basins, impairing the quality of freshwater aquifers. Without the implementation of TMDL Constituent Schedule projects for salt management and removal, Chloride Completed 2002 inland areas engaged in groundwater extraction, irrigation, and water re-use will Nutrients Most Reaches continue to experience long-term increases Completed 2003 in salinity levels, as the salts are cycled and Organics Scheduled for Fiscal concentrated. Year (FY) 05-06 Metals Upstream: In addition to high TDS levels, the Scheduled for Watershed also contains high levels of FY 06-07 chloride, sulfate, and boron, limiting the Mugu Lagoon: Watershed’s ability to support its designated Scheduled for beneficial uses. Thirty separate pollutants FY 08-09 in the Watershed are listed on the Clean Toxicity Scheduled for Water Act Section 303(d) list of impaired (water soluble FY 03-04 waters. For each of these pollutants, a pesticides) TMDL must be developed to achieve compliance with water quality standards. In Non-chloride Salts Scheduled for March 1999, a consent decree among EPA, (boron, sulfate, TDS) FY 03-04 Santa Monica BayKeeper, and Heal the Bay Historic Pesticides and Scheduled for Inc., represented by the Natural Resources Effects FY 04-05 Defense Council, was approved. This PCBs Scheduled for consent decree required that all TMDLs for FY 04-05 the Los Angeles Region be adopted within Sediment Bound Scheduled for 13 years and prescribed schedules for Organics and Effects FY 08-09 development and implementation of certain TMDLs. With these complex and interrelated issues, local policymakers and resource managers are faced with a number Inextricably linked to water quality, water of environmental challenges in the quantity issues are also of tremendous Watershed. concern. The area is heavily dependent on imported SWP water supplies to meet According to the RWQCB’s October 2004 municipal demands. SWP supplies can be Watershed Management Initiative (WMI) variable and uncertain. In addition, SWP report, the TMDLs that are either adopted or supplies are expensive and costs are in process for the Calleguas Creek expected to continue to rise. By increasing Watershed are found in Table 3. Tables 7a use of local supplies and reducing and 7b to the WMI report, as referenced on dependence on imported water, water the RWQCB’s website, indicate tentative supply reliability can be enhanced.

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The Watershed is a complex, large-scale 1.2.2 Relation to Statewide system affected by water importation, groundwater extraction and recharge, water Priorities recycling, treated water discharge, and Implementation of the projects outlined in urban and agricultural runoff, that has the IRWMP is consistent with all seven experienced, and continues to experience, Statewide Priorities as discussed below. degradation of water quality. Successful solutions to the salinity and TMDL issues affecting the Watershed must also be large 1.2.2.1 Reduce the Conflict Between scale in order to achieve measurable Water Users or Resolve Water benefits and support the Watershed’s many Rights Disputes, Including currently impaired beneficial uses. Interregional Water Rights Issues The IRWMP is a compendium of such As discussed in further detail in Section 2, forward thinking large-scale projects, which most of the groundwater basins in the serves as the backbone system of a truly Watershed are managed by the Fox reliable, environmentally sensitive, and cost Canyon Groundwater Management Agency effective solution to the myriad of water (FCGMA). Thus, certain aspects of resource issues affecting the Watershed. groundwater rights are regulated. However, Although the salts TMDL is still in not all groundwater basins are managed by development, it is clear that salt a central governing body, nor are all issues management will be a critical element and resolved within the managed basins. agencies within the Watershed are taking proactive steps to implement salt Potable water demands are largely met with management projects. Implementation of SWP water. SWP entitlements and policies the IRWMP would remove existing salts are structured and imported water within the Watershed, reduce salinity entitlement issues should be minimal due to loadings into the Watershed, facilitate the contracts already in place. restoration of coastal wetlands, help sustain important agricultural operations in Ventura However, water supply and quality remain County, reduce the demand on imported challenging issues in the Watershed, as water from the SWP, increase water supply they are in all of Southern California. reliability, and provide overall benefits to Reducing dependence on imported water Ventura County and the State of California. and more efficiently managing local resources would help avoid or reduce any future water resource conflicts. In 1.2.1 Objectives particular, the Watershed faces challenges The IRWMP refines the CCWMP actions associated with competing interests found in Section 2 of the CCWMP, and (agricultural, municipal and industrial, and focuses on the following three objectives: environmental) and groundwater and surface water allocations. „ Reducing dependence on imported water „ Improving water supply reliability „ Managing and removing salts in the Watershed and complying with TMDL requirements

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1.2.2.2 Implementation of Total through the ongoing CCWMP committee Maximum Daily Loads That and subcommittee meetings. Furthermore, Are Established or Under the IRWMP includes projects, such as the Development Brineline and desalters, to implement TMDLs that would improve management of The High Priority Actions discussed in salts and other constituents to improve CCWMP Section 2 include several TMDLs water quality in the entire Watershed. in the Calleguas Creek Watershed. These TMDLs are for salts, toxicity, metals, historic pesticides and PCBs, bacteria, and 1.2.2.4 Meet Delta Water Quality nutrients. Studies are currently underway to Objectives aid in this process and are available on the As a result of Calleguas’ current CCWMP website. dependence on approximately 120,000 AFY The IRWMP is strongly supportive of this of imported surface water from the SWP statewide priority. Several of the projects, (and the Delta), increased development of including the Brineline; Renewable Water local groundwater supply through the Resources Management Program; implementation of this IRWMP would Camarillo Groundwater Treatment Facility; reduce dependence on the SWP, South Las Posas Regional Desalter; Somis particularly in times of drought and other Desalter; West Simi Desalter; and the water shortages. By reducing the Conejo Creek North Fork – Wildwood Park Watershed’s dependence on the SWP, Water Management Enhancement additional supplies would remain within the Project would reduce additional salt Delta by which to better meet Delta Water loadings to, or remove salt from, the Quality Objectives. Watershed to meet TMDLs. In addition, the recycled water components of the 1.2.2.5 Implementation of Renewable Water Resources Management Recommendations of the Program and recycled water projects for Floodplain Management Task Ventura County Waterworks District Nos. 1 Force, Desalination Task and 8, would support achievement of Force, or Recycling Task TMDLs. Force The California Department of Water 1.2.2.3 Implementation of Regional Resources has led the formation and Water Quality Control Board implementation of task forces for floodplain Watershed Management management, desalination, and recycled Initiative Chapters, Plans, and water. Each task force has prepared Policies reports documenting the results of its The CCWMP has been prepared in efforts. The CCWMP action items include coordination with the Los Angeles RWQCB flood protection and sediment management, WMI. The IRWMP supports this statewide as well as water resources and water priority in that it considers the Watershed as quality. The projects proposed within this a region and addresses water supply, water IRWMP include groundwater desalination, quality, and habitat issues on a holistic recycled water, and elements of floodplain Watershed-wide basis. In addition, the management and help achieve this IRWMP has been prepared through a statewide priority. collaborative process with a variety of local stakeholder groups, including RWQCB staff,

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1.2.2.6 Address Environmental improves both ecosystem and water quality Justice Concerns in the Bay-Delta and provides additional water supply for the state. As previously discussed, in the development of the CCWMP, public The IRWMP, through the implementation of stakeholder groups participated in the the Brineline and other projects (see decision making process at the committee Section 3), represents a CALFED solution meetings and there have been a large that is physically outside of the Bay-Delta, number of community and public outreach but one that results in positive ecological, activities, including the CCWMP website. A water supply, and water quality benefits to detailed summary of these activities is the Bay-Delta system. Furthermore, the provided in the CCWMP. IRWMP meets the CALFED Watershed Program Objectives of facilitating The implementation projects in the IRWMP coordination/collaboration, integration with are not limited to the more affluent areas of other CALFED elements, and defining how the Watershed, nor do they Watershed processes relate to CALFED disproportionately burden the less affluent goals and objectives. areas. Therefore, while the projects are not targeted at disadvantaged communities, very few of which exist in the Watershed 1.2.3 Relation to Regional based of the definition in the Guidelines, the IRWMP has broadly distributed benefits to Priorities the entire Watershed and all of its residents. As part of the CCWMP, the Steering Committee members, representing all of the 1.2.2.7 Assist In Achieving One or subcommittees, met in several workshop More Goals of the CALFED sessions to develop a list of issues that the Bay-Delta Program CCWMP would be expected to address. As stated in the CCWMP, the identified issues With a vested interest in the ongoing serve as the foundation for the development CALFED program, Calleguas has been of the CCWMP Action Recommendations closely monitoring the process and, in and represent the Regional Priorities. The developing the IRWMP, has clearly short-term and long-term Regional Priorities demonstrated its commitment to undertake are better identified through the ranking of local projects that reduce Southern the CCWMP action items as shown in California’s dependence on SWP water and Section 3.1. address salts issues in the Watershed. These activities are consistent with three of Long-Term Regional Priorities CALFED’s primary objectives and are critical to the success of the program. The „ Water supplies are limited, yet no local four CALFED objectives are: consensus exists on priorities for beneficial uses of the water supply. 1. Ecosystem Quality „ Potential conflicts exist among wetland 2. Water Supply conservation, planned urban activities, 3. Water Quality and public facilities. 4. Levee System Integrity „ Potential species/habitat impacts are unquantifiable because adequate data The IRWMP meets the first three objectives do not exist. by reducing the use of imported water which

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„ Upland habitat loss may result in 1.3 Relation to Local species endangerment, thereby necessitating future regulations with Planning potentially adverse economic As part of the CCWMP planning process, a consequences. Land Use subcommittee was created to address the coordination of current and Short-Term Regional Priorities future land use planning within the „ All water dischargers need to comply Watershed through local plans, ordinances, with state and federal water quality polices and guidelines, including general standards, including regulations for point plans, specific plans, and other long-range and non-point pollution sources. policy documents. The three goals of this subcommittee are to: „ The Watershed contains an accumulation of toxic chemicals and the „ Develop, maintain, and share up-to-date control and mitigation of pollution in the and accurate information about the Watershed needs to be effective. Watershed. „ Erosion, land loss, and sedimentation „ Promote local comprehensive planning have been accelerated by agriculture consistency with the CCWMP. and urbanization. „ Identify criteria to assist in the location „ Environmental regulations and of necessary regional public facilities. responses should be coordinated and streamlined, and Watershed Thus, the Land Use subcommittee provides management should take a holistic, a link between local planning agencies and rather than a piecemeal, approach. the IRWMP by offering a forum for „ All stakeholders want to maintain and, if discussion in their meetings, providing possible, enhance the quality of life in accurate, consistent land-use planning the Watershed. information, and incorporating local planning documents and goals into the project As previously discussed, the committees objectives. continue to conduct meetings to address concerns within the Watershed and provide In addition, the cities of Moorpark, a means to present and discuss proposed Thousand Oaks, Simi Valley, and Camarillo projects within the Watershed. Thus, the are represented on the committees. These committees have an active role in the agencies have land use planning jurisdiction decision making process for project for most of the area within the Watershed. implementation. Furthermore, the Steering Committee, by evaluating the proposed projects in terms of the effect to the 1.4 Disadvantaged Watershed as a whole, can redefine the Communities implementation order to address the highest priority issues in the Watershed. The Guidelines define disadvantaged communities as those where the median household income (MHI) is less than 80 percent of the statewide MHI (or 80 percent of $47,493 or $37,994). Although neither Ventura County as a whole nor the Calleguas Creek Watershed area

Calleguas Creek Watershed Management Plan Addendum 11 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc are disadvantaged communities based on Watershed. Successful solutions to the the 2000 Census data and by the definition salinity and TMDL issues affecting the in the Guidelines, there are several census Watershed must also be large-scale in order tract areas that have significantly lower to achieve measurable benefits and support incomes than the areas around them. the Watershed’s many currently impaired Based on a review of the MHI data from the beneficial uses. Therefore, many of the 2000 Census, it is estimated that projects incorporated into the IRWMP are approximately 16.5 percent of the large-scale, expensive, and complicated. households in the Watershed earn less than Potential obstacles that the Stakeholders $34,999. need to address include regulatory, funding, and scheduling issues. These issues are all It also should be noted that the statewide linked to the scale and complexity of the MHI is considerably lower than the Ventura projects involved. County MHI of $59,666. Both values are lower than the average MHI of $72,587 for Due to the large number of agencies the five census county divisions (CCDs) of involved in the IRWMP and the scale and Moorpark, Las Posas, Simi Valley, complexity of the projects involved, a large Thousand Oaks, and Camarillo, which number of regulatory and permitting generally comprise the Calleguas Creek approvals are needed for project Watershed. Therefore, given the higher implementation. The regulatory approval than statewide MHI in this area, which also process has the tendency to be lengthy, and results in higher housing and other local implementation of the IRWMP will be costs, the actual MHI which would be extended by the time required for these considered disadvantaged in the Calleguas approvals. Hopefully, since the regulatory Creek Watershed is in actuality likely to be agencies have taken part in the higher than the statewide MHI. subcommittee meetings and have had the ability to make recommendation in the The implementation projects in the IRWMP planning and design phase of the projects, are not limited to the more affluent areas of time for regulatory and permitting approvals the Watershed, nor do they will be reduced. disproportionately burden the less affluent areas. Therefore, while the projects are not Another potential obstacle is the availability targeted at disadvantaged communities, of funding for the selected projects. Many very few of which exist in the Watershed of the projects incorporated into the IRWMP based on the definition in the Guidelines, are large-scale, and these projects are not the IRWMP has broadly distributed benefits inexpensive. Thus, identifying and to the entire Watershed and all of its obtaining adequate funding will be residents. challenging and may be time-consuming.

The third potential obstacle is schedule. 1.5 Potential Obstacles Again, due to the large number of agencies The Watershed is a complex, large-scale involved, it takes time to achieve system affected by water importation, consensus, especially since an underlying groundwater extraction and recharge, water goal of the IRWMP is to collaborate with all recycling, treated water discharge, and agencies within the Watershed. Further urban and agricultural runoff, that has investments of time may be necessary to experienced, and continues to experience, gather accurate and consistent data on the degradation of water quality throughout the Watershed. Although development and

Calleguas Creek Watershed Management Plan Addendum 12 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc implementation of the IRWMP will be time- consuming, the member agencies believe that good planning takes time. The benefits of collaboration and accurate data justify the time required for implementation.

Despite the potential obstacles to implementation, the agencies involved are dedicated to implementation of the projects of the IRWMP. If Proposition 50 funding is obtained, these projects could be implemented more quickly.

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Section 2: Region Description

As described previously, the region is the boundary. The region includes the following Calleguas Creek Watershed, which is located named water bodies: Calleguas Creek, predominantly in southern Ventura County. Arroyo Las Posas, Arroyo Simi, Conejo Calleguas’ boundary is such that the Creek, Arroyo Santa Rosa, Arroyo Conejo, Watershed is contained almost entirely within Revolon Slough, Beardsley Wash, and Mugu its boundary, except for small areas in the Lagoon, many of which are shown on Santa Monica Mountains as shown on Figure 3. The area includes the cities of Figure 1. Calleguas is the wholesale Camarillo, Moorpark, Simi Valley, and purveyor of water in the region and the lead Thousand Oaks, and unincorporated areas of agency for the IRWMP. the County of Ventura.

The Calleguas Creek Watershed is Calleguas is the primary water supplier for appropriately defined as a region for the much of urban Ventura County. Calleguas following reasons: distributes water on a wholesale basis to local agencies and private companies within the „ Hydrologic issues tend to be specific to region, which in turn deliver water to area individual watersheds with their unique residents, businesses, and agriculture. configuration, water resources, water Calleguas supplies high-quality drinking water quality, and geology. to approximately 550,000 people. Three- quarters of Ventura County residents now „ Water quality impairments, and therefore TMDLs, are specific to individual reaches depend on Calleguas for all or part of their and watersheds. water. „ Unlike the rest of Ventura County, the A list of participating agencies is provided in Calleguas Creek Watershed is heavily Table 1 of Section 1.1.2. While Calleguas dependent upon an imported water delivers imported water to the City of Oxnard, supply. Port Hueneme Water Agency, and Lake Sherwood Community Services District, these „ The CCWMP group recognized its common problems, issues, and goals in agencies are not part of the region because 1996, and has been meeting consistently their boundaries are not within the since that time to develop and implement Watershed. There are also several small solutions. water companies and agencies within the region that have not been an active part of the IRWMP, primarily due to lack of staff and 2.1 Region Boundaries budget. Many of these purveyors, listed in The Watershed is 30 miles long by 14 miles Table 3, have limited or no full-time staff and wide and has an area of approximately 343 serve only agricultural users. Even though square miles. Virtually the entire region is these small water purveyors are not able to located in Ventura County. It extends from actively participate in the IRWMP, any the Los Angeles County line to the east to projects that provide local resources and Mugu Lagoon and the Pacific Ocean to the reduce imported water demand benefit every south. The Santa Susana Mountains, South water purveyor within the region. Mountain, and Oak Ridge form the northern boundary of the Watershed; the Simi Hills and Santa Monica Mountains form the southern

Calleguas Creek Watershed Management Plan Addendum 14 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc Arroyo Simi Arroyo Las Posas

Revolon Slough

Conejo Creek

Calleguas Creek

Calleguas Creek Watershed

CCWMP Addendum

Map source: Calleguas N Calleguas Creek and Tributaries Municipal Water District GIS June 2005

Prepared by Kennedy/Jenks Consultants, K/J 0587108*00 Figure 3

an overview of Calleguas’ existing sources of Table 4: Additional Small Water water supply and the transmission system Purveyors Within Region facilities.

Purveyor* General Area Served Calleguas’ primary source of supply is from Berylwood Heights Los Posas Valley east of the Metropolitan Water District of Southern Mutual Water Moorpark California (Metropolitan) West Valley Feeder Company No. 2, which conveys water from Brandeis Mutual Water South central Simi Valley Metropolitan's Jensen Water Treatment Plant Company (WTP) and Sepulveda Feeder to Calleguas’ Butler Ranch Water Unincorporated area north East Portal facility for delivery through the Company of Tierra Rejada Valley Perliter Tunnel. West Valley Feeder No. 2 is capable of delivering up to 300 cubic feet per California-American Western Thousand Oaks Water Company second (cfs) to the East Portal. Calleguas’ facilities are capable of delivering up to California Water Eastern Thousand Oaks Service Company 333 cfs from the Perliter Tunnel to the remainder of the Calleguas distribution Crestview Mutual Las Posas Estates system. Major Calleguas facilities for delivery Water Company northwest of Camarillo of imported water within Ventura County are Mesa Water Company Unincorporated area east shown on Figure 4. of Thousand Oaks (Ahmanson Ranch) Other sources of treated water supply to the Newbury Park Newbury Park Calleguas system include the Lake Bard Academy Mutual Water Water Treatment Plant and the Las Posas Company Basin aquifer storage and recovery (ASR) Oak Park Water Oak Park Project. The Lake Bard Water Treatment Service Plant, which has a capacity of 100 cfs, has Pleasant Valley Mutual Camarillo Heights north of been operational since August 1995. The Water Company Camarillo water treatment plant is used during summer Southern California Eastern and Central Simi months to supplement Metropolitan imported Waster Company Valley deliveries to the Calleguas system. Zone Mutual Water Las Posas Valley east of Company Moorpark The Las Posas Basin ASR Project has the * Water purveyors listed are those with direct access to capacity to develop up to 300,000 AF of Calleguas water; other water purveyors exist within the storage in the Lower Aquifer System of the Calleguas service area but are not Calleguas member agencies and do not have access to Calleguas water. Las Posas Groundwater Basin. ASR uses These other agencies are very small and/or only dual-purpose, injection/extraction deliver water to agricultural users. groundwater wells for the purpose of storing water and subsequently producing the stored 2.2 Water Related water as needed. The project enables pre- delivery and storage of large volumes of SWP Infrastructure water in the Calleguas service area during Calleguas’ existing water system includes periods of availability. The stored water is extensive transmission pipelines, pump later extracted by Calleguas to meet stations, storage reservoirs, pressure seasonal, drought, and emergency demands. regulating stations, and hydroelectric generating facilities to convey water to its 22 wholesale customers. This section provides

Calleguas Creek Watershed Management Plan Addendum 16 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc MMoorparkoorpark LateralLateral

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Calleguas Creek Watershed Map Source: Calleguas Municipal Water District GIS CCWMP Addendum N Calleguas Municipal Water District Major Facilities June 2005 Prepared by Kennedy/Jenks Consultants, K/J 0587108*00 Figure 4

Approximately 70,000 AF of water has been production, with a market value of $1.16 stored to date, and approximately 50 cfs can billion dollars in 2002, up from $845 million be extracted. dollars in 1997. Ventura County is the number one producer of lemons, celery, and The Calleguas transmission system consists mustard greens in the state; second in of approximately 130 miles of pipe ranging strawberry, avocado, kale greens, romaine from 24- to 78-inches in diameter and extends lettuce, and radish production; and third in from Simi Valley west and south through peppers and cabbage. Moorpark, Thousand Oaks, and Camarillo. The system includes eight reservoirs, four Based on the current land use and projected hydroelectric generation stations, and six long-range development plans for each pump stations. Each retail purveyor receives community in the region, an additional 37,000 water from one or several “turnouts” or meter acres have been identified to be converted to stations, which monitor imported water urban uses over the next 20 years. The deliveries. majority of the future urban expansion is projected to occur through the conversion of Each retail water purveyor also has its own open space/natural areas. system of pipelines, wells, reservoirs, and pump stations, which vary in size depending on the nature of the purveyor’s system. 2.4 Quantity and Quality of Water Resources in 2.3 Land Use Region The IRWMP region includes the Cities of Simi The water quantity and quality of both Valley, Moorpark, and Camarillo, as well as a groundwater and surface water resources in significant portion of the City of Thousand the Calleguas Creek Watershed are Oaks and unincorporated portions of the discussed below. County of Ventura. Urban development within these jurisdictions represents about 25 percent of the Watershed, with residential 2.4.1 Water Quantity land uses representing about 50 percent of Three major watercourses drain from the the developed lands. As described in a 2004 Santa Susana and Santa Monica mountains report prepared by the Southern California generally to the southwest, where they flow Association of Governments (SCAG), the across the Oxnard Plain before emptying into residential land area was home to about the Pacific Ocean through Mugu Lagoon. 320,000 people in 2000 and is expected to Local surface water is used for agricultural increase to around 400,000 by the year 2020. purposes only. Imported water and The growth anticipated between 2000 and groundwater are used for municipal and 2020 should account for a 6 percent increase industrial purposes. in residential acreage within areas accounted for in current planning documents. The Watershed includes several significant groundwater basins. Water rights are not While the cities within the region have been formally managed in every one of these expanding tremendously since the 1960s, basins, so groundwater production is not agriculture remains a major land use in comprehensively controlled or thoroughly Ventura County, accounting for 15 percent of documented. However, groundwater the land area in the region. Today, Ventura extractions are regulated in the Oxnard Plain, County ranks tenth in the state in agricultural Pleasant Valley Basin, the western portion of

Calleguas Creek Watershed Management Plan Addendum 18 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc the Arroyo Santa Rosa Basin, and all three of throughout the region over the past two the Las Posas Basins (West, East, and decades. South) by the FCGMA. The FCGMA boundaries and groundwater basins are Recharge to the shallowest aquifers occurs shown on Figure 5. by direct infiltration of precipitation, as well as via subsurface infiltration through streambed In some basins, groundwater is being over- deposits. Soil surveys show permeability, or drafted and, as a result, portions of the the saturated hydraulic conductivity, of Pleasant Valley Basin and the Oxnard Plain streambed deposits within the Watershed to have experienced up to 2 feet of subsidence. be greater than 90 micrometers/second, or In other basins, such as the Simi Valley 13 inches/hour. This level of permeability Basin, groundwater storage has increased indicates that water can easily percolate significantly in the last several decades, through the streambed deposits and recharge necessitating dewatering operations in order the shallow aquifers. Recharge from streams to protect development from flooding and can be seen most notably along Arroyo Las nuisance water. This increase is due to a Posas downstream of the City of Moorpark. combination of an overall decrease in In this reach, enough recharge occurs so that groundwater use, partially due to quality the stream is dry in most summer months. concerns, and the availability of imported water that has increased the total volume of water entering the basin and providing 2.4.2 Water Quality recharge. A large portion of the surface waters within the region are considered impaired for one or Groundwater recharge occurs in certain more water quality constituents. Applicable aquifer outcrop areas and on various reaches water quality standards are identified in the of individual streams. The amount of Basin Plan for the Coastal Watersheds of Los recharge is predicated on the depth and width Angeles and Ventura Counties, dated June of the underlying stream channel deposits, 1994. Water quality is assessed on a bi- nature of the geologic materials comprising annual basis and impairments are listed on the stream channel deposits, depth and the State of California List of Impaired Water nature of the geologic materials underlying Quality Segments (i.e., 303(d) list), with the the stream channel deposits, depth to 2002 303(d) list being the most current groundwater, and quantity and timing of water available. flowing into the streams. With the exception of Arroyo Simi near the western end of the In March 1999, a consent decree among the Simi Valley, streams have historically been EPA, Santa Monica BayKeeper, and Heal the ephemeral in nature and conveyed water only Bay Inc., represented by the Natural during seasonal storm cycles. However, Resources Defense Council, was approved. beginning in the late 1950s, and increasingly This consent decree specifies required TMDL significantly since the 1970s, discharges of completion dates for several TMDL Analytical treated wastewater effluent into the streams Units located in the Watershed. A schedule have maintained nearly continuous flows presented in the RWQCB WMI is found in along portions, and at times the entire length, Table 3. of the stream reaches. Further, stormwater and landscape irrigation runoff and return The water quality objectives listed in the flows have increased as residential and Basin Plan are considered necessary to commercial developments have expanded protect existing and potential designated beneficial uses.

Calleguas Creek Watershed Management Plan Addendum 19 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc Calleguas Creek Watershed

CCWMP Addendum N FCGMA and Groundwater Basins Map Source: FCGMA June 2005

Prepared by Kennedy/Jenks Consultants, K/J 0587108*00 Figure 5

The State Board Policy with Respect to Groundwater quality has been affected Maintaining High Quality Water in California substantially by agricultural and urban uses. (State Board Resolution No. 68-16) protects Discharges from septic tanks, infiltration of existing high quality waters of the state. The irrigation flows with accompanying fertilizers water quality objectives would be achieved and pesticides, and percolation of treated primarily through the establishment of waste urban wastewater affect groundwater quality. discharge requirements, implementation of the Los Angeles Region of the RWQCB's water quality control plan, and by developing 2.5 Water Supplies TMDLs and establishing Waste Load Currently, Southern California faces several Allocations and Load Allocations. In addition, supply-related problems affecting the the Los Angeles Region of the RWQCB can reliability of water deliveries. If no action is develop site-specific objectives (SSOs) when taken, urban Southern California faces the location in question has different probable water shortages even in non- beneficial uses, or has physical or chemical drought years. The Calleguas Creek characteristics that may alter a pollutant's Watershed region, because of its increasing biological availability or toxicity. These SSOs population, dependence on imported must be approved by the SWRCB and the supplies, and continuing degradation of area EPA. groundwater supplies, is faced with a variety of water management challenges. According to the 2002 303(d) list, there are 162 reach-to-pollutant combinations, The economic vitality of Ventura County is impairing 344 acres of Mugu Lagoon and contingent upon a dependable water supply. approximately 118 miles of streams within the It is therefore incumbent upon Calleguas as a Calleguas Creek, Conejo Creek, and Revolon regional water agency, to work together with Slough systems. The majority of these other local and regional agencies, to develop listings (64) occurs within the Historic a strategy to secure the water supplies and Pesticides/PCBs category, followed by Salts the level of reliability which are needed to with 34, Nutrients with 28, Toxicity with 11, assure continued economic prosperity of the Sedimentation with 9, Bacteria with 8, Metals Watershed. with 6, Trash with 2, and Organophosphate Pesticides with 1. As discussed earlier, TMDLs for many of these listed constituents 2.5.1 Imported Water Supplies are either completed or in process. Calleguas is entirely dependent upon The quality of groundwater varies widely, Metropolitan for its supply of potable water. reflecting both the geologic characteristics of Metropolitan is a wholesale water agency that aquifers, as well as land use practices in the serves supplemental imported water from Watershed. Groundwater from some basins Northern California and the Colorado River to meets potable water and irrigation quality 27 member agencies located in portions of requirements without any treatment, while Los Angeles, Orange, Riverside, San groundwater in other areas requires treatment Bernardino, San Diego, and Ventura or blending with imported water to address Counties. salts, iron, manganese, and/or nitrate. There are also areas where the groundwater is not SWP deliveries vary annually with contractor currently used for potable purposes due to demands and projected water supplies from high levels of these constituents. tributary sources to the Delta, which are based on snow pack in the Sierra Nevada, reservoir storage, operational constraints, and

Calleguas Creek Watershed Management Plan Addendum 21 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc demands of other water users. Historically, groundwater quantity and quality, in 1983, the the SWP has been able to meet all contractor FCGMA was created to manage and preserve requests for water except during the drought groundwater resources within the lands years of 1977, 1991-92, and 1994. In many overlying the boundaries of the Fox Canyon years, surplus water has been delivered to aquifer. The FCGMA boundaries encompass contractors. Deliveries to Metropolitan a vast majority of retail water suppliers within reached a high of 1,396,000 AF in calendar the Calleguas service area which, to varying year 1990 prior to the drought of the early degrees, rely on groundwater resources. 1990s. Given the location of Calleguas’ water distribution system relative to Metropolitan The FCGMA has adopted a number of and SWP systems, Calleguas currently ordinances in an effort to eliminate historic receives SWP water, exclusively. groundwater overdraft and to combat the ongoing threat of seawater intrusion in both One of the primary goals of Metropolitan and the aquifer systems within its boundaries. its member agencies is to develop additional These ordinances and resolutions help to reliability through the California Aqueduct by regulate, conserve, and manage the use and purchasing out-of-region storage for SWP extraction of groundwater within the region. water and SWP water transfers. Metropolitan's Integrated Resources Plan Each non-agricultural pumper has an (IRP) calls for developing a total of allocation based on its historic pumping. A 460,000 AF of dry-year storage and water pumper can only extract up to its annual transfer deliveries by 2020. Metropolitan has allocation; pumping beyond the allocation developed groundwater storage programs results in substantial financial penalties. with Semitropic Water Storage District and Arvin-Edison Water Storage District, which To more effectively manage local water together will provide up to 245,000 AFY resources, in 1995, Calleguas instituted a during dry years. local groundwater banking program to credit water users who purchase water from The construction of the Las Posas ASR Calleguas in-lieu of pumping groundwater, so Project was intended to improve water supply that this groundwater can be stored for later reliability by storing imported water in the Las use during higher demand periods. Posas groundwater basin. This supply would then be available to the region in times of Since poor water quality of the groundwater drought or emergency, when SWP supplies limits its beneficial use, a number of desalters may be interrupted or limited. are proposed, as discussed in greater detail in Section 3. In order to facilitate pumping, treating, and using poor quality groundwater, 2.5.2 Local Supplies discussions with FCGMA indicate that While many of Calleguas' retail-level water conceptual approval has been granted purveyors are dependent on Calleguas whereby poor quality groundwater may be deliveries to meet demands, several produce able to be pumped without expending groundwater in addition to receiving imported allocation. water supplies. Over the past century, the combination of increasing urban and In addition, several local agencies, including agricultural activities in the area has caused Camrosa Water District, Ventura County groundwater overdraft and seawater intrusion Waterworks District No. 8, and Ventura into groundwater reserves within the region. County Waterworks District No. 1, have In order to address concerns about initiated recycled water programs to use treated wastewater effluent for irrigation

Calleguas Creek Watershed Management Plan Addendum 22 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc purposes in lieu of potable water, where Currently, the creeks have few native fish possible. In order to preserve groundwater species with limited populations and no and imported water for potable purposes, species identified as sportfish. Despite the these agencies hope to expand their recycled lack of fishery resources, flows in Calleguas water systems as part of the IRWMP. Creek and Revolon Slough are of importance because they are the main source of freshwater to Mugu Lagoon, an extensive salt 2.6 Water Demand marsh ecosystem. According to the Calleguas 2000 Urban Water Management Plan, the water demand Ecosystem functions and values are lower in (supplied via Calleguas) in the region, is the portions of the creek and tributaries that estimated to be approximately 92,000 AF for have been channelized. In the Arroyo Simi, 2005, assuming normal year demands. As fish species commonly found are the native discussed earlier, the region does not include arroyo chub (Gila orcutti), and the introduced the City of Oxnard, Port Hueneme Water mosquito fish (Gambusia affinis), brown Authority, or Lake Sherwood Community bullhead (Ameiurus nebulosus), green sunfish Services District, so the demands for these (Lepomis cynellus), and blunt-nosed minnow agencies have been subtracted from (Pimephales notatus). Based on limited Calleguas’ demand estimates. On average, survey data, amphibians do not appear to be municipal and industrial uses account for abundant anywhere in the Watershed, but 95 percent of Calleguas' annual deliveries western toads and Pacific tree frogs have with agricultural demands comprising the been observed in terrestrial habitats around remaining 5 percent. lawns and residences. Wading and diving birds have been observed, and habitat values The region’s future demand in 2020 is appear suitable to support viable populations. projected to be approximately 112,000 AF for normal year conditions. 2.7.2 Mugu Lagoon Mugu Lagoon is one of the largest and best- 2.7 Environmental preserved coastal wetland systems in Resources Southern California, and therefore one of the most valuable to fish and wildlife. Historically, Environmental resources associated with the the lagoon was a true lagoon system, having region include Calleguas Creek and its no direct freshwater input and under the full tributaries and Mugu Lagoon. influence of the Pacific Ocean's tidal prism. During this period, the habitats around the lagoon were influenced purely by the salinity 2.7.1 Calleguas Creek and its gradient and influence of tidal waves. Salt Tributaries marsh ecosystems were active and stabilized dune communities. Today, the lagoon is Calleguas Creek and its main tributary, perennially connected to the Calleguas Creek Conejo Creek, have perennial flows that are stream system due to human-created maintained by discharges from wastewater channelization and hydrologic connection. treatment facilities and by irrigation drainage The estuarine ecosystem contains water and return flows from agricultural and approximately 300 acres of marine lagoon urban land uses. Habitat values along the and channels, 1,000 acres of mudflats and creek system vary on a site-by-site basis, salt marsh, and 2,000 acres of associated generally corresponding to the proximity of intertidal and subtidal habitats. Public and development or intrusion by human activities.

Calleguas Creek Watershed Management Plan Addendum 23 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc private uses of the lagoon include duck and the county, which is about a 63 percent rabbit hunting, netting of baitfish, Naval Base increase from the 2000 census. operations, and a controlled program of scientific and educational pursuits. SCAG projections indicate that a total of 128,000 jobs will be added to Ventura County The salt marsh and intertidal mudflats of by 2030. Jobs in service and retail sectors Mugu Lagoon are important habitats for will grow rapidly within Ventura County during species using the lagoon and offshore area. the 2000-2030 period. It is projected that Mugu Lagoon, which forms an integral part of those two sectors will contribute 95,000 jobs the Pacific Flyway, is vital for seven federally or about 75 percent of the total job growth in and/or state threatened and/or endangered the county. Ventura County has the highest species; three protected marine mammals; 30 number of agriculture jobs in Southern species which are candidates for listing; and California. In the year 2000, the county had 36 state species of special concern. Some of 30,000 agriculture jobs, twice the agriculture the endangered species in the area are the jobs in Imperial County. The major change California brown pelican (Pelicanus that will occur in the Ventura County economy occidentalis californicus), light-footed clapper over the forecast period is urbanization, which rail (Rallus longirostris levipes), California will result in a continuing decline in least tern (Sterna antillarum browni), agricultural employment. SCAG is also American peregrine falcon (Falco peregrinus), projecting that Ventura County will lose 8,500 and Belding savanna sparrow (Passerculus jobs, or decrease 29 percent in agricultural sandwichensis beldingi). jobs, over the forecast period.

2.8 Social, Cultural, Economic Conditions and Trends As described in the SCAG 2004 report,

Ventura County is projected to have 990,000 people by 2030, which is an increase of

230,000 people during the forecast period. The annual population growth rate is about

1 percent. Following the Southern California trend, Ventura County is projected to be more racially and ethnically diverse by 2030 than it is today. The Hispanic population is projected to increase dramatically and the share of the Caucasian population is expected to decrease. The Hispanic population is projected to be 421,000, which is a 66 percent increase from the 2000 census and an annual growth rate is about 2.2 percent. African Americans are projected to have a very small increase, adding only 5,000 people over the forecast period. The Asian population is projected to add 38,000 to

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Section 3: Elements of the Plan

To achieve the stated objectives, ten projects with wastewater discharges that are currently have been selected for implementation in this occurring to surface waters. IRWMP as follows:

1. Calleguas Regional Salinity Management 3.1 Water Management Project (Brineline) Strategies 2. Renewable Water Resources The CCWMP provides a detailed discussion Management Program for the Southern of the history of projects and studies that Reaches of the Calleguas Creek occurred prior to its implementation. A Watershed (RWRMP) reference list in Volume I of this IRWMP documents the prior work. A list of the water 3. Camarillo Groundwater Treatment Facility management strategies considered in the development of the CCWMP and their 4. South Las Posas Basin Regional Desalter relationship to the short-term and long-term 5. Somis Desalter regional objectives is provided in Table 5 below. A summary of the specific projects 6. West Simi Desalter considered for implementation in this IRWMP is provided in Table 6. The projects are 7. VCWWD1 Expansion of the Reclaimed described in detail in Section 3.3 below. Water Distribution System Table 7 provides a cross-reference between the projects and: 8. Simi Valley Regional Recycled Water System 1. the Eligible Water Management Elements presented in California Water Code 9. Conejo Creek North Fork - Wildwood Park (CWC) Section 79561; Water Management Enhancement Project 2. the Water Management Strategies, Applicable Program Preferences, and 10. Calleguas Creek Watershed DWR and SWRCB Statewide Priorities Arundo/Tamarisk Programmatic EIR/EA, presented in the Guidelines; and Permits & Pilot Removal Project 3. the Volume I: CCWMP Phase I report These projects are an extension of the goals Action Recommendations and this identified in the CCWMP and meet the IRWMPs Objectives. objectives of the IRWMP as discussed below. The projects are described in greater detail below and their locations are shown on Figure 6.

The projects are shown in order of priority for implementation. Project 1. Brineline is a cornerstone project that is integral to the execution of the desalters in particular but also necessary for overall salt management in the Watershed by removing salts associated

Calleguas Creek Watershed Management Plan Addendum 25 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc Hwy 23 8. VCWWD 8 Recycled Water

4. Las Posas Desalter 6. West Simi Desalter Watershed Watershed Boundary 5. Somis Desalter Hwy Boundary 126 Hwy Hwy 126 118 Hwy 118 7. VCWWD 1 Recycled Water

3. Camarillo Groundwater Treatment 9. Wildwood Park Hwy 23

Hwy 34 Hwy 34 Hwy 101 Hwy 1. Calleguas Brineline CMWD Boundary 1

Hwy 1 2. Renewable Water Resources

Hwy 101 CMWD ty ty Boundary n un ou o C C ra es tu el n ng Ve A s Lo

Calleguas Creek Watershed

NOTES: Project 10. Arundo/Tamarisk Removal will occur in various locations throughout the Watershed CCWMP Addendum N Project Locations June 2005

Prepared by Kennedy/Jenks Consultants, K/J 0587108*00 Figure 6

Table 5: CCWMP Short- and Long-Term Action Recommendation and Relationships to Water Management Strategies and Regional Priorities

Action Item Water Management Regional Priorities # Action Recommendation Strategies Addressed Addressed Relationship to Other Activities High Priority Action Recommendations (Short-Term Objectives) 1 Establish a coordinated Open Space Planning Network (OSPN) to create a network of connected blocks of open space for: • Ecosystem Restoration • Habitat Protection and Restoration Action has the potential to act as the • Conservation of viable populations of sensitive plant and animal species, as well as natural communities • Environmental and Habitat Protection • Hydrology implementation mechanism for many other • Restoration and enhancement of wetland and riparian ecosystems, including invasive plant removal and Restoration • Soil Erosion and Sedimentation action recommendations • Preservation of recreational opportunities • Flood Management • Recreation Action should be initiated by the end of 2004 • Protection and improvement of water quality • Recreation and Public Access • Water Quality Improvement • Management of sediment and erosion control • Water Quality Protection and • Management of floodplains for flood control and prevention Improvement • Wetlands Enhancement and Creation 2 • Develop a Watershed Data Repository to provide a single point of access to Watershed information and tools for Plan • Watershed Planning • Public Awareness Identify a 'Gatekeeper' tasked with participants • Land use Planning • Communication to Stakeholders coordinating with entities undertaking activities • Provide summary and contact information for technical studies, maps, and models cooperatively developed as part of the WMP • Education related to the Calleguas Creek WMP to ensure • Prepare Plan documents in format for easy accessibility and viewing the data and information is placed in the • Provide online ongoing activity and information to help keep the public informed Watershed Data Repository 3 • Evaluate Stormwater Retention and Detention Systems • Flood Management • Hydrology This information should be used to inform and • Study effectiveness of Retention and Detention (R/D) systems throughout the Watershed in preventing flooding and trapping • Stormwater Capture and Management • Soil Erosion guide Actions 4, 11, 13, and 15 sediments • Surface storage • Sedimentation The determination of the feasibility of • Determine feasibility and functionality of a Watershed-wide flood protection and sediment control mitigation banking system • Habitat Protection developing Watershed-wide flood protection and sediment control mitigation banks should be directly incorporated into Action 1 4 • Conduct further research into the past, present, and future implications of hydrologic modifications in the Watershed as they • Flood Management • Hydrology Information will have an effect on/be affected relate to the evaluation of potential positive and negative impacts to flood control, sediment management, riparian habitats, and • Environmental and Habitat Protection • Soil Erosion by the findings of Action 3 endangered species and Improvement • Sedimentation Information may modify the priorities of Action • Watershed Planning • Habitat Protection 11, and influence the decision making process • Water Quality Protection and • Water Quality Improvement of Action 1 Improvement 5 • Prepare and implement a Salts TMDL, including problem, source, numeric target, linkage, waste load allocations, load • Water Quality Protection and • Water Quality Improvement Action will affect the development of Actions allocations, critical conditions, margin of safety, and implementation plan. Improvement • Habitat Protection 3, 4, 6, 7, 8, 9, 10, 11, 13, 14, & 15, • Remove water quality impairment to restore beneficial uses of surface water and reclaim valuable groundwater resources • Environmental and Habitat Protection Action will be affected by the findings of • Review existing beneficial uses and water quality objectives (WQO) currently assigned to the Watershed in the Basin Plan and Improvement Actions 3, 4, 6, 7, 8,9, & 10 • Where impairments may not be removed, TMDLs will be developed 6 • Prepare and implement a Toxicity TMDL, including problem, source, numeric target, linkage, waste load allocations, load • Water Quality Protection and • Agricultural Soil Productivity Action will affect the development of Actions allocations, critical conditions, margin of safety, and implementation plan. Improvement • Water Quality Improvement 1, 3, 4, 7, 8, 10, 15, & 19 • Address the beneficial use impairments caused by unidentified pollutants causing toxicity (toxicants) and the presence of • Environmental and Habitat Protection • Habitat Protection Action will be affected by the findings of organophosphate pesticides and Improvement Actions 7,8, & 19 7 • Prepare and implement a Metals TMDL, including problem, source, numeric target, linkage, waste load allocations, load • Water Quality Protection and • Water Quality Improvement Action will affect the development of Actions allocations, critical conditions, margin of safety, and implementation plan. Improvement • Habitat Protection 3, 4, 6, 13 15, & 19 • Identify tasks required to address beneficial use impairments caused by metals • Environmental and Habitat Protection Action will be affected by the findings of and Improvement Actions 3, 4, 13, 15, & 19 8 • Prepare and implement a Historic Pesticides & PCBs TMDL, including problem, source, numeric target, linkage, waste load • Water Quality Protection and • Water Quality Improvement Action will affect the development of Actions allocations, load allocations, critical conditions, margin of safety, and implementation plan. Improvement • Habitat Protection 6, 13, 15, & 19 • Identify tasks required to address beneficial use impairments caused by the pesticides and PCBs of concern. • Environmental and Habitat Protection Actions will be affected by the findings of and Improvement Actions 6, 13, 15, & 19 9 • Prepare and implement a Bacteria TMDL, including problem, source, numeric target, linkage, waste load allocations, load • Water Quality Protection and • Water Quality Improvement Action will affect the development of Actions allocations, critical conditions, margin of safety, and implementation plan. Improvement • Habitat Protection 3, 15, & 19 • Identify tasks required to develop and implement a plan to address the beneficial uses impaired by bacteria • Environmental and Habitat Protection Action will be affected by the findings of and Improvement Actions 3, 15, & 19

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Action Item Water Management Regional Priorities # Action Recommendation Strategies Addressed Addressed Relationship to Other Activities 10 • Implement the requirements of the Nutrients TMDL, including the development and implementation of the required monitoring • Water Quality Protection and • Water Quality Improvement Action could affect the development of Actions plans and special studies. Additionally, provide input to the LARWQCB regarding mechanisms to incorporate TMDL requirements Improvement • Habitat Protection 1, 3, 4, 6, 8, 13, 15, 16, & 19 into the Irrigated Lands Conditional Waiver currently being developed. • Environmental and Habitat Protection • Soil Erosion Action could be affected by the findings of and Improvement • Agricultural Soil Productivity Actions 3, 4, 6, 8, 13, 15, 16, & 19 • Sedimentation • Hydrology Additional Action Recommendations 11 Undertake the development of a Major Capital Facilities Plan to: • Water Quality Protection and • Hydrology Action will affect the development of Actions • Prevent or reduce flooding and property damage Improvement • Soil Erosion 3, 4, 13, 15, & 19 • Minimize erosion and instability of streambeds, banks, and slopes • Environmental and Habitat Protection • Habitat Action will be affected by the findings of • Protect or improve water quality and improvement • Protection Actions 3, 4, 5, 9, 10, 13, 15, & 19 • Maintain or improve the reliability and integrity of the drainage system • Flood Management Action should be implemented as part of Action • Stormwater Capture and Management 1 12 Develop Public Outreach and Education Strategy to: • Watershed Planning • Public Awareness Action will be affected by the findings of all • Provide open public process to review TMDLs • Communication to Stakeholders other Actions. • Improve the public's awareness of Watershed issues, how they contribute to these issues, and what they can do to help resolve • Education Action will be used as an stakeholder them • Habitat Protection and Restoration communication tool and implementation • Enhance coordination between public agencies on the information and advice they provide mechanism • Inform landowners and residents of recommended BMPs targeted per specific stakeholder groups • Encourage compatible land use activities within and adjacent to sensitive resources 13 • Identify, encourage and promote demonstration projects for Model Flood Protection and Erosion Control Techniques • Flood Management • Hydrology Action will affect the development of Actions • Soil Erosion 3, 4, 6, 8, 10, 15, & 19 • Habitat Protection Action will be affected by the findings of Actions 3, 4, 6, 8, 10, 15, & 19 Action should be implemented in coordination with Action 1 14 • Adopt uniform hydrologic criteria and methodology for local flood control planning and facility maintenance • Flood Management • Hydrology Actions could affect the development of • Soil Erosion Actions 3, 13, 15, & 19 • Habitat Protection Findings of this Action should be integrated into Action 1 15 • Promote and recommend Best Management Practices based on a Watershed-wide strategy to control volume, flow rate and • Watershed Planning • Hydrology Action could affect the development of Actions sediment load of stormwater run off • Stormwater Capture and Management • Soil Erosion 3, 4, 6, 8, 9, 13, & 19 • • Habitat Protection Action could be affected by the findings of Actions 3, 4, 6, 8, 9, 13, & 19 16 • Develop TMDL for sediment pollutants, including problem, source, numeric target, linkage, waste load allocations, load • Water Quality Protection and • Water Quality Improvement Action could affect the development of Actions allocations, critical conditions, margin of safety, and implementation plan Improvement • Hydrology 3, 4, 6, 8, 11, 13, 15, & 19 • Environmental and Habitat Protection • Soil Erosion Action could be affected by the findings of and improvement • Habitat Protection Actions 3, 4, 6, 8, 13, 15, & 19 17 • Establish, maintain, and expand data on current biological resources and land use/resource management status within the • Land Use Planning • Habitat Protection Implementation of this Action will benefit many Watershed • Environmental and Habitat Protection • Land Use Planning of the other Actions by providing better insight and Improvement to potential habitat/species impacts 18 • Improve recreational opportunities. When planning new public facilities, public agencies should: • Recreational and Public Access • Recreation Planning Action could affect the development of Actions • Make provisions to incorporate a recreational element in their design • Land Use Planning • Habitat Protection 1, 3, 10, 11,13, 15, & 19 • Facilitate interagency collaboration for the utilization of existing or future public agencies' rights-of-way for recreational use such • Land Use Planning Action could be affected by the findings of as bike trails, or other uses fitting within the current facility use • Hydrology Actions 3,10, 13, & 15 • Coordinate recreation planning with open space planning through a cooperative interjurisdictional process 19 • Study the feasibility of retrofitting components of the existing MS4 systems to determine what measures can be taken to improve • Land Use Planning • Water Quality Improvement Action could affect the development of Actions the current system • Water Quality Protection and • Hydrology 3, 4, 6, 7, 9, 10, 13, & 15 Improvement • Sedimentation Action could be affected by the findings of • Land Use Planning Actions 3,4, 6, 7, 9, & 10 20 • Address potential endangered species conflicts in the Watershed through nonregulatory, coordinated local land use policies that • Land Use Planning • Habitat Protection The goals and purpose of this Action should be are based on an overall comprehensive conservation strategy • Environmental and Habitat Protection • Land Use Planning addressed via the implementation of Action 1 and Improvement and the Open Space Planning Network (OSPN)

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Table 6: IRWMP Proposed Project Summary

Project Water Supplied/ Salts Removed At Full No. Agency Project Title Project Description Integration with Other Projects Project Completion 1 Calleguas Municipal Water Regional Salinity Management Project (Brineline) • 32 mile 48-inch diameter wastewater and brine conveyance Linked to Projects 2,3,4,5, 6, and 9 • Pipeline annual capacity = up to 45,000 AFY District pipeline 2 Camrosa Water District Renewable Water Resources Management Program for • Phase 1 – 35,350 LF of recycled water transmission and Linked to Project 1 • Recycled Water = 12,600 AFY Camarillo Sanitary District the Southern Reaches of the Calleguas Creek Watershed distribution, 8 mgd recycled water pumping facility, 1-2 mgd of • Groundwater = 7,800 AFY City of Thousand Oaks (RWRMP) groundwater desalting, 1.5 miles of pipeline for brine disposal and • Salts removed = 14,000 tons/year potable water conveyance, water conservation and salt source control, 10.5 mgd total expansion of 1 existing and 2 new blending facilities, wastewater discharge relocation, monitoring. • Phase 2 – 5 mgd groundwater desalting, imported water replenishment/recharge, monitoring • Phase 3 – 4.2 mile recycled water interconnect pipeline and pump station, monitoring • Phase 4 – 3- 5 shallow groundwater wells in Conejo Groundwater Basin and additional wells in Lower Watershed and monitoring 3 City of Camarillo Public Works Camarillo Groundwater Treatment Facility • 4 mgd microfiltration and reverse osmosis groundwater desalting Linked to Project 1 • Groundwater = 4,400 AFY Department facility • Salts removed = 8,100 tons/year 4 Ventura County Waterworks South Las Posas Basin Desalter • 5 mgd reverse osmosis groundwater desalting facility Linked to Project 1 • Groundwater = 5,600AFY District No. 1 • Salts removed = 10,100 tons/year 5 Ventura County Waterworks Somis Desalter • 2 mgd reverse osmosis groundwater desalting facility Linked to Project 1 • Groundwater = 2,240 AFY District No. 19 • Salts removed = 4,000 tons/year 6 Ventura County Waterworks West Simi Desalter • 3 mgd capacity reverse osmosis groundwater desalting facilities Linked to Project 1 • Groundwater = 3,300 AFY District No. 8/City of Simi Valley from 5 dewatering wells • Salts removed = 6,100 tons/year 7 Ventura County Waterworks VCWWD1 Expansion of Reclaimed Water Distribution • 6,225 LF 8- to 12-inch diameter recycled water transmission and Linked to Projects 2 and 8 • Recycled Water = 1,680 AFY District No. 1 System distribution pipeline and recycled water reservoir 8 Ventura County Waterworks Simi Valley Regional Recycled Water System • 18,200 LF of 12- and 24- inch diameter recycled water pipeline Linked to Projects 2 and 7 • Recycled Water = 2,000 AFY District No. 8 / City of Simi Valley • 2@ 2 mg recycled water reservoirs 9 Mountains Recreation and Conejo Creek North Fork – Wildwood Park Management • Improvement of 2,900 LF of Conejo Creek within 263 acre Linked to Project 10 • Not applicable Conservation Authority Enhancement Project drainage area from residential subdivisions 10 Ventura County Resource Calleguas Creek Watershed Arundo/Tamarisk • Removal to occur within entire Calleguas Creek Watershed Linked to Project 9 • Not applicable Conservation District Programmatic EIR/EA, Permits & Pilot Removal Project

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f ons o ons ti a d ve plants, the creation ask force, desalination treatment technologies; recommen f on o ti a t emen l mp floodplain management t I task force, recycling task force, orAddress environmental justice concerns; and state species of the goals or more one in achieving Assist Program. Bay-Delta CALFED Water Resources and Water Quality Habitat and Recreation Management Sediment and Flood Protection Agriculture Land Use (Watershed Data Repository) Public Outreach and Education Water on Imported Dependence Reducing Reliability Supply Water Improving Watershed in the Salts Removing and Managing Requirements TMDL with Complying and Watershed in the Salts Removing and Managing Requirements TMDL with Complying and Water Supply Reliability, Conservation, Efficiency Conservation, Reliability, Supply Water Storm water capture, storage, treatment, and management Removal of invasive non-nati acquisition, the and of wetlands, enhancement and protection, and restoration of open space and lands; watershed monitoring management, pollution reduction, NPS management and recharge Groundwater through reclamation, removal salt and Contaminant desalting, and other Water banking, exchange, reclamation, & water quality improvement flood of multipurpose implementation and Planning and property; protect that programs control improve water quality, storm water capture and habitat; wildlife or improve protect and percolation; and planning management Watershed implementation water for drinking projects Demonstration distribution and treatment Ecosystem Restoration* and protection habitat and Environmental improvement* Reliability* Supply Water Flood management* management* Groundwater Recreation and public access* management* and capture water Storm Water conservation* improvement* and protection quality Water Water recycling* Wetlands enhancement and creation* use Conjunctive Desalination water Imported planning use Land pollution control NPS Surface storage planning Watershed Water and wastewater treatment Water transfers benefits; with multiple projects integrated Include water regional and local improve and Support reliability; supply Contribute expeditiously and measurably to the of water maintenance and attainment long-term quality standards; Eliminate or significantly reduce pollution in impaired waters and sensitive habitat areas, including areas of special biological significance; quality water and water drinking safe Include projects that serve disadvantaged communities; Ecosystem Quality Supply Water Quality Water Levee System Integrity Reduce conflict between water users or resolve water interregional including disputes, rights water rights issues; that Loads Daily Maximum of Total Implementation are established or under development; Control Quality Water of Regional Implementation Initiative Management Watershed (RWQCB) Board Chapters, plans, and policies; Non-point Source SWRCB’s of the Implementation (NPS) Pollution Plan; Assist in meeting Delta Water Quality Objectives; IRWMP Program Guidelines Applicable CALFED Primary IRWMP Program Guidelines CCWMP Action Project No. and Title CWC 79561 Eligible Water Management Elements IRWMP Program Guidelines Water Management Strategies* IRWMP Objectives Program Preferences Objectives DWR and SWRCB Statewide Priorities Recommendation Key Areas 1 Regional Salinity Management Project (Brineline) 3 3 3 3 3 3 33 3 33333 33 3 3 3 3 3 333 3 3 3 3 3 3 3 33333 3 3

2 Renewable Water Resource Management Program for the Southern Reaches of Calleguas 3 3 33 3 3 3 3 3 3 333 33 33 3 3 3 3 3 333 3 3 3 3 3 3 3 33333333 3 3 Creek Watershed (RWRMP)

3 Camarillo Groundwater Treatment Facility 3 3 3 3 3 3 3 33 33 3 3 3 3 3 333 3 3 3 3 3 3 3 3 33333 3 3

4 South Las Posas Basin Desalter 3 3 3 3 3 3 3 33 33 3 3 3 3 3 333 3 3 3 3 3 3 3 3 33333 3 3

5 Somis Desalter 3 3 3 3 3 3 3 33 33 3 3 3 3 3 333 3 3 3 3 3 3 3 3 33333 3 3

6 West Simi Desalter 3 3 3 3 3 3 3 33 33 3 3 3 3 3 333 3 3 3 3 3 3 3 3 33333 3 3

7 Expansion of Reclaimed Water Distribution System 3 3 3 3 33 33 3 3 3 3 3 333 3 3 3 3 3 3 3 3 33333 3 3

8 Simi Valley Regional Recycled Water System 333333 33 3 3 3 3 3 333 3 3 3 3 3 3 3 3 33333 3 3

9 Conejo Creek North Fork - Wildwood Park Water Management Enhancement Project 33 3 33 3 3 3 3333333 3 33 3 3 3 3 3 3 333 3 3 3 3 3 333 3333 3 3

10 Calleguas Creek Watershed Arundo/Tamarisk Programmatic EIR/EA, Permits & Pilot Removal 3 3 3 33 333 3 3 3 3 333 3 3 33 33 3 3 3 Project

Summary of Overall Program 3 3 3 33 3 3 3 3 3333333333333 3 33 3 3 3 3 3 333 3 3 3 3 3 3 3 33333333 3 3 * Asterisked items are per CWC 79562.5 and 79564

3.2 Integration management, water supply reliability, and conjunctive use as in Projects 1, 2, 9, and 10, All of the water management strategies the IRWMP maximizes beneficial use of the identified in the Guidelines and listed below available local water sources and thus were considered in the CCWMP and are improves water supply reliability. components of the projects selected for implementation as listed in Tables 6 and 7: In addition, through the combined efforts of water conservation, water recycling, „ Ecosystem Restoration stormwater capture and flood management in „ Environmental and Habitat Protection and Projects 2, 7, and 8, the IRWMP objective of Improvement reducing dependence on imported water supply is met by maximizing the efficient use „ Water Supply Reliability of local water supplies and reducing potable „ Flood Management water demand. „ Groundwater Management „ Recreation and Public Access Furthermore, through the combined efforts of brackish water desalting, water and „ Stormwater Capture and Management wastewater treatment, and non-point source „ Water Conservation pollution control of the desalters (Projects 2, „ Water Quality Protection and 3, 4, 5, and 6), the IRWMP objective of Improvement managing and removing salts for TMDL „ Water Recycling compliance is met. Other environmental „ Wetlands Enhancement and Creation benefits and public acceptance can be achieved by the implementation of the „ Conjunctive Use ecosystem restoration, wetlands „ Desalination enhancement, and recreation and public „ Imported Water access management strategies in Projects 9 „ Land Use Planning and 10. Thus, it is only through the integration of these water management „ Non Point Source (NPS) Pollution Control strategies that all three IRWMP objectives can „ Surface Storage be met. „ Watershed Planning „ Water and Wastewater Treatment 3.3 Regional Priorities „ Water Transfers As described above, these IRWMP projects Through the combined implementation of meet the overall IRWMP objectives of: these water management strategies, all the IRWMP objectives listed in Section 1.2.1 can „ Reducing dependence on imported water. be achieved. Tables 6 and 7 also show the „ Improving water supply reliability. relationships and dependencies between „ Managing and removing salts in the projects that demonstrate the integration of Watershed and complying with TMDL the projects with the objectives and each requirements. other. These objectives are regional in nature. The There are a number of benefits of integration priority order of the projects reflects the as described in the following three examples. regional priorities in that Project 1. Brineline is By utilizing the management strategies of the key regional element of the IRWMP watershed planning, groundwater because it spans the Watershed and is

Calleguas Creek Watershed Management Plan Addendum Page 31 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc essential for implementation of many of the initiated the implementation of the Calleguas other projects. Regional Salinity Management Project (Brineline), as described in more detail below. The Brineline is a cornerstone project 3.4 Implementation within the IRWMP necessary to manage the Proposed projects of the IRWMP were use of both treated municipal wastewater and selected for their ability to meet the water high salinity groundwater, thereby providing management strategies, IRWMP objectives, up to 45,000 AFY of conveyance capacity for and benefits to the Watershed. Each project local water to be used for both domestic and is described in the following subsections in agricultural use and reducing the need to the order of implementation priority. Each import water to the region. Thus, the project is supported by technical studies that Brineline meets all three IRWMP objectives. are found in the reference section to this IRWMP. 3.4.1.1 Project Description The Brineline would consist of a pipeline 3.4.1 Project 1. Calleguas system to collect treated wastewater and brine concentrates from municipal wastewater Regional Salinity treatment plants, groundwater treatment Management facilities (both municipal and agricultural), and Project (Brineline) industrial operations located within the Watershed, and convey the effluent to other In order to address increasing salinity levels areas for direct use (e.g., suitable agricultural and water supply issues in the Watershed, uses and wetland applications) or an existing Calleguas, working with other agencies and ocean outfall. Operation of the project stakeholders through the CCWMP process, facilities would substantially reduce the

Calleguas Creek Watershed Management Plan Addendum Page 32 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc amount of salts released into the Watershed, Environmental and Habitat Protection and and over time, the Brineline would reduce salt Improvement: The Brineline would provide a concentrations in surface waters and blend of wastewater and desalter brine to groundwaters within the Watershed. existing and proposed restored wetlands areas near Ormond Beach. The alignment of the pipeline system would lie entirely within the Watershed, and extend Water Supply Reliability: By providing brine approximately 32 miles from its upstream end disposal from desalting of brackish in the City of Simi Valley to its downstream groundwater, the Brineline allows the local terminus near Ormond Beach in the City of groundwater to be used for beneficial potable Oxnard. The pipeline would pass through the and agricultural use, thus increasing water cities of Simi Valley, Moorpark, Camarillo, supply reliability and reducing reliance on the Oxnard, and portions of unincorporated use of imported SWP water. Ventura County. Along its route, the Brineline would receive discharges of tertiary treated Groundwater Management: Groundwater effluent from several wastewater treatment pumping for desalting (Projects 2, 3, 4, 5, and plants (Camrosa Wastewater Treatment 6) would occur in strategic locations with Plant, Camarillo Sanitary District Water careful monitoring of water levels and water Reclamation Plant, and Hill Canyon quality, as part of overall groundwater Wastewater Treatment Plant), and brine management activities in the Pleasant Valley, waste from several proposed desalters, six of South Las Posas and Simi groundwater which are included in the IRWMP: two in basins. As the groundwater to be pumped for Project 2. RWRMP, Project 3. Camarillo the desalters is poor quality groundwater that Groundwater Treatment Facility, Project 4. is currently largely unusable, facilitating South Las Posas Basin Desalter, Project 5. beneficial use is an improved groundwater Somis Desalter, and Project 6. West Simi management approach and is supported by Desalter. the FCGMA, who manages most of the basins under consideration. To date, Calleguas has constructed approximately 20,000 linear feet (LF) of Water Quality Protection and Improvement: 48-inch high-density polyethylene (HDPE) By pumping high salinity groundwater and pipe, which comprises Phase 1A. Phase 1B, reducing the wastewater discharges to which includes another 9,000 LF of 48-inch Calleguas Creek, the Brineline would provide HDPE pipe, is currently under design. a vital link for implementation of the planned Phase 1C would connect Phases 1A and 1B TMDL for salts in Calleguas Creek. with an existing ocean outfall at the Reliant Implementation of the TMDL and removal of Energy Ormond Beach Power Plant for ocean salts from the Watershed would result in discharge. Future phases would extend the water quality protection and improvement in Brineline up through the Watershed, roughly both surface water and groundwater. paralleling Calleguas Creek, to enable additional facilities to connect to the Brineline Water Recycling: The Brineline would be for discharge. used for conveyance of recycled water to downstream areas for agricultural irrigation and wetlands restoration. 3.4.1.2 Relationship to Water Management Strategies Wetlands Enhancement and Creation: As The Brineline meets the following water described earlier, the Brineline would provide management strategies: a blend of wastewater and desalter brine to existing and proposed restored wetlands near

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Ormond Beach, thereby enhancing these Estimated valuable resources. Estimated Completion Project Phase Start Date Date Conjunctive Use: Over the long term, the Phase 1C improved use of the groundwater basins Permitting October 2003 April 2006 through pumping and desalting groundwater Design December December would allow facilitate conjunctive use of the 2005 2006 groundwater basins by removing poor quality Construction January 2007 January 2008 groundwater and enabling recharge with high Phase 2A quality storm water flows. Permitting August 2007 April 2007 Design March 2006 April 2007 Desalination: The project is integral to the Construction May 2007 December removal and disposal of dissolved minerals 2008 from brackish groundwater so it can be used Phase 2B as a potable supply source. Permitting August 2007 May 2008 Design March 2007 May 2008 Watershed Planning: The Brineline was Construction June 2008 November developed through the watershed planning 2009 process in the Calleguas Creek Watershed. Phase 3 The necessity to remove salts as Permitting October 2009 April 2010 accomplished by the Brineline has been Design March 2009 April 2010 identified as a High-Priority (short-term) Action in the CCWMP. Construction May 2010 December 2011 Water and Wastewater Treatment: The Note: Schedule is contingent upon funding availability. Brineline is a critical component of water and wastewater treatment in the Watershed by 3.4.1.4 Cost providing an expedient means of exporting The approximate capital cost for the Brineline brines from brackish groundwater treatment is $73,240,000. facilities out of the Watershed and of delivering treated wastewater for use further downstream or discharge. 3.4.1.5 Integration With Other Projects The Brineline is critical for implementation of 3.4.1.3 Status and Schedule IRWMP projects, specifically those involving desalters, for brine disposal. The Brineline The table below details the project schedule. would provide brine disposal for the following IRWMP projects: RWRMP (Project 2), Estimated Camarillo Groundwater Treatment Facility Estimated Completion (Project 3), South Las Posas Basin Regional Project Phase Start Date Date Desalter (Project 4), Somis Desalter Phase 1A (Project 5), and West Simi Desalter Planning Completed (Project 6). These projects could not be CEQA Completed implemented without the Brineline, without Phase 1B which there would be no mechanism for brine Permitting January 2005 July 2005 disposal. Design July 2004 July 2005 Construction August 2005 August 2006

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3.4.2 Project 2. Renewable The Watershed’s hydrology is complex and dynamic. In order to evaluate the RWRMP’s Water Resource ongoing effect on sub-watershed salt Management Program for balances, a monitoring and adaptive the Southern Reaches of management element is included. The initial phase would include the establishment of the Watershed automated monitoring points on the creek to The RWRMP for the Southern Reaches of the measure flow and salt concentrations. By Watershed is a joint effort between Camrosa collecting data on an ongoing basis, the Water District, Camarillo Sanitary District, and agencies could track and evaluate how best the City of Thousand Oaks. It would involve to move additional salts out of the Watershed. an integrated set of facilities to reduce Collected data would be analyzed regularly reliance on imported water supplies while for comparison to water quality objectives and improving water quality through the managed project-specific improvement criteria. Data, transport of salts out of the Watershed; thus, analysis results and conclusions would be it meets all three IRWMP objectives. shared with stakeholders through the Calleguas Creek Watershed planning process. A continuous inventory of the inputs 3.4.2.1 Project Description and outputs of salts to each sub-watershed The RWRMP seeks to manage salts through would be maintained to document the relative a systems approach. To the extent possible, success in transporting salts out of the the RWRMP would address the salt Watershed. The RWRMP is designed to be imbalance by reducing salts introduced into implemented incrementally so that water the Watershed, quality impacts and future actions can be removing salts currently disposed into the creek system, distributing water to move salts down gradient and out of the Watershed, introducing high quality water into the creek system to increase its capacity to carry salts that cannot otherwise be intercepted, and finally capturing and disposing of concentrated salts that would not otherwise move out of the Watershed.

Calleguas Creek Watershed Management Plan Addendum Page 35 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc evaluated at each phase. The components of 2 mgd. The treatment process would each phase are described below. employ either RO or electrodialysis reversal technology. The brine waste Phase 1 streams from well treatment would be discharged to the Brineline. A 0.4 mile Phase 1 focuses on increasing long small diameter pipeline would be recycled/reclaimed water use, reducing salt constructed to transport the brine to the inputs to surface waters, and constructing southwest to connect with the Brineline. A facilities to transport salts out of the 1.1 mile long 10-inch diameter pipeline Watershed. Components of Phase 1 include: would connect the product drinking water to the Camrosa potable water system. „ Expansion of Recycled Water Transmission and Distribution System. A „ Water Conservation and Source Control. 8,200 linear foot (LF) 24-inch diameter Incentives/disincentives to reduce salt- pipeline and 8 million gallon per day (mgd) based water softener use would be pumping facility would be constructed to implemented within the Camrosa, deliver recycled water from the Camarillo Camarillo and Thousand Oaks service Water Reclamation Plant (WRP) into the areas. An outdoor water conservation existing Camrosa recycled water system program would be developed and approximately 1.5 miles west of the implemented throughout the lower treatment plant. A replacement pipeline Watershed. (36 inches in diameter) would be constructed from the Camrosa water „ Water Blending Facilities. Existing storage ponds for 13,350 LF to a point blending facilities and new facilities would south of the Potrero Road bridge and with be used to meet the water quality needs an interconnection to the Brineline. The for salt concentrations of various users. pipeline alignment would follow the The existing facilities in the Santa Rosa existing pipe corridor. Approximately Valley would be expanded and new 13,700 LF of additional small diameter (14 facilities in the eastern portion of the to 24 inches) pipelines would be installed Pleasant Valley and at the Woodcreek to distribute recycled and non-potable well in Camarillo would be added. Major water to western Santa Rosa Valley, new components would include: eastern Camarillo (immediately west of ● Expansion of the existing 3 mgd Calleguas Creek and south of U.S. 101), blending capacity for the agricultural and eastern and southwestern Pleasant irrigation system in the Santa Rosa Valley. These pipelines would be Basin to 4.5 mgd. primarily located along agricultural access roads. ● New 3 mgd blending facility at the „ Groundwater Reclamation. A portion of Woodcreek Well Facility. the water produced from the eastern Pleasant Valley Basin unconfined aquifer ● New 6 mgd blending facility at system would be treated for salt removal Camrosa’s water storage ponds. to produce potable water to supplement the Camrosa’s potable water deliveries. „ Relocation of Wastewater Discharge The treatment plant (desalter) would be Point. Surplus treated wastewater from located at the existing well facility near the Camarillo WRP, Camrosa Water California State University Channel Reclamation Facility (WRF), and, in a later Islands and treat approximately 1 to phase, the City of Thousand Oaks Hill

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Canyon Wastewater Treatment Plant streams from the treatment plant would be (HCTP) would no longer be discharged at discharged to the Brineline. A 2.7 mile- their current discharge locations. The long small diameter (10 to 12 inch combined wastewaters would be diameter) brine disposal pipeline would be discharged to a point downstream of the installed along Upland Road to connect to Potrero Road bridge on Calleguas Creek the Brineline near Arroyo Las Posas. when there is surplus wastewater in the water recycling system. This discharge „ Initiate Replenishment Water Releases. A location would also be used when the 0.5 mgd pilot groundwater treatment Brineline is unable to receive such waters project would be constructed to pump, because of temporary operational treat for salt removal, and discharge interruptions. New major facilities would higher quality groundwater from the include a discharge structure with a Conejo Groundwater Basin to the Arroyo capacity of 25 mgd located downstream of Conejo as a basis for a comparison to the Potrero Road bridge for release to using imported water for replenishment Calleguas Creek. sources. As an alternative, small amounts of imported water would be discharged to „ Monitoring. The program would include Arroyo Conejo from the Calleguas three new or upgraded automated flow distribution system. Water would be measuring and sample collection stations released in the City of Thousand Oaks at three points on the stream system to from about 3 to 5 discharge locations. record flow and various water quality These water releases would be parameters. Preliminary monitoring experimental to determine the feasibility of locations include Arroyo Conejo in Hill maintaining instream beneficial uses and Canyon, Conejo Creek at Baron Brothers water quality for groundwater recharge in Nursery and Calleguas Creek at the Santa Rosa Groundwater Basin University Drive. following the termination of discharge of HCTP effluent (see Phase 3). If the Phase 2 treated groundwater option proved the preferred alternative, the expansion of Phase 2 would expand groundwater groundwater pumping in the Conejo treatment, expand recycled water distribution Groundwater Basin discussed in Phase 4 facilities and initiate water releases to the would proceed next as the source of Arroyo Conejo creek system in anticipation of replenishment water prior to Phase 3. terminating the discharge of the HCTP to North Fork Arroyo Conejo (Phase 3). „ Monitoring. Additional monitoring (beyond Phase 2 components would include: Phase 1) may be implemented to determine the effects of replenishment „ Groundwater Reclamation. A portion of water releases. the water produced from the Santa Rosa Basin would be treated for salt removal to Phase 3 produce potable water to supplement the Camrosa’s potable water deliveries. A Phase 3 focuses on terminating discharge of 5.0 mgd treatment plant (desalter) would effluent from the HCTP into Arroyo Conejo be constructed at the Camrosa Water and introducing it directly into the Camrosa District headquarters to treat Santa Rosa recycled/non-potable water distribution Basin water. The treatment process system for agricultural irrigation purposes. would employ either RO or electrodialysis Phase 3 components include: reversal technology. The brine waste

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„ Thousand Oaks – Camrosa Recycled Watershed where salts may accumulate, Water Interconnect: A new 4.2 mile-long shallow dewatering wells could be pipeline (30 to 36 inches in diameter) constructed and operated to 1) blend with would be constructed to transport tertiary- other waters for irrigation uses, 2) treated wastewater from the HCTP to discharge to the Brineline, or 3) treat for interconnect with Camrosa’s recycled use and the brine stream discharged to water distribution system near Camrosa’s the Brineline. Disposal of these waters on Reservoir 1-A. The pipeline alignment an as-needed-basis would prevent would be located along Hill Canyon Road continued salt accumulation and excess immediately west of the roadway salt loading to the surface water system. pavement. The pipeline would likely be Major components would include new placed above-ground and covered with fill. shallow wells (number and location to be In the Santa Rosa Valley, the pipeline determined) and pipelines to pump and would be located within agricultural fields. transport water to the Brineline. This is A new pump station at the HCTP would lift outside the direct jurisdiction of the current the water to Camrosa Reservoir 1-A. public agencies participating in this project, but could be implemented by „ Monitoring: Continued monitoring would others in coordination with this integrated be necessary to adjust the replenishment program water to meet water quality and in-stream objectives. Based on this monitoring, the „ Monitoring: Ongoing monitoring would staging of the final project phase would be focus on long-term patterns and evaluated. management of salt transport.

Phase 4 3.4.2.2 Relationship to Water Management Strategies Phase 4 focuses on pumping brackish groundwater to transport salts. Components The RWRMP would meet the following water of Phase 4 include: management strategies:

„ Conejo Groundwater Basin. Wells would Water Supply Reliability: By increasing be installed to pump groundwater from the recycled water use, treating brackish Conejo Valley Basin and discharge into groundwater for potable use, and improving the stream system in coordination with water conservation, use of local water replenishment releases to assure resources would be maximized, thus compliance with surface water quality increasing water supply reliability and standards. Major new components would reducing reliance on the use of imported SWP include several shallow groundwater wells water. (3 to 5) located near the South Fork of the Arroyo Conejo with metering facilities and Groundwater Management: Phase 1 of the diffusers for release into the creek. Well RWRMP includes groundwater pumping for locations have not been identified to date, desalting, while future phases include release but would likely be within the northern and of replenishment water, active management western portion of Thousand Oaks. of the Conejo Groundwater Basin, as well as the unconfined shallow aquifer in the lower „ Lower Watershed. As an additional Watershed, which are all activities associated management tool that could be with groundwater management. implemented by others to manage salt loading in the lower areas of the

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Water Conservation: The RWRMP includes a desalting pumped groundwater, while future water conservation component for reducing phases include use of replenishment water for the introduction of salts, including new groundwater recharge. These activities would programs and enhancements to existing allow both in-lieu and active conjunctive use programs for water conservation in both of the groundwater basins. urban landscape and agricultural irrigation. The programs would target reductions in Watershed Planning: The RWRMP is the imported water and groundwater pumping result of watershed planning and from the Fox Canyon system to reduce salt management activities in the Calleguas Creek loading to the Watershed. The RWRMP Watershed. The necessity to remove salts as includes a minimum goal of 2 percent accomplished by the RWRMP has been reduction in outdoor water use. identified as a High-Priority (short-term) Action in the CCWMP. Water Quality Protection and Improvement: By pumping and treating high salinity Water and Wastewater Treatment: The groundwater and reducing wastewater RWRMP includes treatment of brackish discharges to Calleguas Creek through water shallow groundwater for potable use, as well recycling and blending and relocating the as use of treated wastewater. wastewater discharge point to downstream of Potrero Road, the RWRMP provides a vital component of implementation of the planned TMDL for salts in Calleguas Creek. Implementation of the TMDL and removal of salts from the Watershed would result in water quality protection and improvement in both surface water and groundwater. 3.4.2.3 Status and Schedule Water Recycling: The RWRMP includes The initial project description has been recycled water conveyance and distribution completed and integrated into the Salts systems for treated wastewater reuse for non- Workplan submitted to the Los Angeles potable purposes. Regional Water Quality Control Board. Several technical studies are in progress on Desalination: The project would remove establishing the relationship between the dissolved minerals from brackish groundwater water quality and quantity of the shallow so it can be used as a potable supply source. groundwater to that of lower confined aquifer and stream flow modeling. Briefings on the Conjunctive Use: The first phase of the project have been provided to U.S. EPA RWRMP includes improved use of the Region 9, State Water Resources Control groundwater basins through pumping and

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Board, and the Los Angeles Regional Water 3.4.3 Project 3. Camarillo Quality Control Board. Groundwater Treatment The table below details the project schedule. Facility

Phase Start Complete The Camarillo Groundwater Treatment Planning 2004 2007 Facility is proposed by the City of Camarillo CEQA 2004 2005 Public Works Department and meets all three Permitting 2005 2007 IRWMP objectives. Phase 1 Design 2004 2006 Phase 1 Construction 2006 2008 Phase 2 Design 2006 2007 3.4.3.1 Project Description Phase 2 Construction 2007 2009 Phase 3 Design 2006 2007 The Camarillo Groundwater Treatment Phase 3 Construction 2007 2010 Facility would be a 4 mgd brackish pending outcome of groundwater treatment facility. The facility Phase 4 Design earlier phases would be located in Camarillo and be owned pending outcome of Phase 4 Construction earlier phases by the City. Reverse osmosis (RO) treatment Note: Schedule is contingent upon funding availability. technology would be used to produce potable quality water. Brine waste, containing concentrated salts from the RO process, 3.4.2.4 Cost would be discharged to the Brineline and The approximate capital cost for the RWRMP exported out of the Watershed. is $30,100,000, for Phases 1-3. Camarillo currently delivers a combination of local groundwater and imported water to its 3.4.2.5 Integration With Other Projects customers. Imported water is provided by This project can be directly linked to most of Calleguas. Despite the availability of the other IRWMP projects. The Simi Valley groundwater extraction rights, the relatively Regional Recycled Water System (Project 8), high TDS, chloride, iron, and manganese and Expansion of Recycled Water Distribution concentrations in the groundwater require that System (Project 7), and the RWRMP it be blended with imported water before it maximize the use of recycled water to can be used for potable purposes. improve water supply reliability and reduce dependence on imported water. The desalter The Pleasant Valley Groundwater Basin has components of the RWRMP would be experienced an ongoing decline in water implemented in conjunction with the other quality, which is suspected to originate from desalter projects, Camarillo Groundwater overflow of poor quality water from upstream Treatment Facility (Project 3), South Las basins. Declining water quality has reduced Posas Basin Desalter (Project 4), Somis the effectiveness of blending, such that Desalter (Project 5), and West Simi Desalter Camarillo has removed one of its wells from (Project 6). The RWRMP is also dependent regular service and decreased pumping from upon the Brineline (Project 1) for brine waste the remaining two wells. Over the past few disposal from the desalters. years, because of water quality issues, Camarillo has not pumped its full FCGMA allocation and has increased its use of imported water.

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Water Quality Protection and Improvement: By pumping and treating high salinity The construction of desalters, like the groundwater, the Camarillo Groundwater Camarillo Groundwater Treatment Facility, Treatment Facility would provide a vital would allow brackish water that is currently component for implementation of the planned unusable to be used beneficially, increasing TMDL for salts in Calleguas Creek. water supply reliability and removing salts Implementation of the TMDL and removal of through brine disposal outside of the salts from the Watershed would result in Watershed. water quality protection and improvement in both surface water and groundwater. 3.4.3.2 Relationship to Water Management Strategies Desalination: The project would remove dissolved minerals from brackish groundwater The Camarillo Groundwater Treatment so it can be used as a potable supply source. Facility would meet the following water management strategies: Conjunctive Use: Over the long term, pumping and desalting groundwater would Water Supply Reliability: By pumping and facilitate conjunctive use of the groundwater treating groundwater for potable use in lieu of basins by removing poor quality groundwater using imported water, water supply reliability and enabling recharge with high quality storm would be increased and reliance on the use of water flows. imported SWP water would be reduced. Watershed Planning: The Groundwater Groundwater Management: Groundwater Treatment Facility is the result of watershed pumping for the Camarillo Groundwater planning and management activities in the Treatment Facility would occur as part of Calleguas Creek Watershed. The necessity overall groundwater management activities in to remove salts as accomplished by the the Pleasant Valley Basin. As the project has been identified as a High-Priority groundwater to be pumped is poor quality (short-term) Action in the CCWMP. groundwater that is currently largely unusable, facilitating beneficial use is an Water and Wastewater Treatment: The improved groundwater management project includes treatment of brackish approach and is supported by the FCGMA, groundwater for potable use. who manages most of the basins under consideration.

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3.4.3.3 Status and Schedule salts from the RO process, would be discharged to the Brineline and exported out The following table details the project of the Watershed. schedule.

Estimated Estimated VCWWD1 currently delivers a combination of Project Phase Start Date Completion Date local groundwater and imported water to its Planning Completed Completed customers. Imported water is provided by Land Acquisition Mid 2005 Late 2005 Calleguas. The South Las Posas CEQA Late 2005 Mid 2006 Groundwater Basin has been virtually full Permitting Mid 2005 Late 2005 since 1983. Despite the availability of water Design Early 2006 Early 2007 Construction Mid 2007 Late 2008 and the presence of potential users, the Note: Schedule is contingent upon funding availability. relatively high TDS and chloride concentrations in the groundwater require that the water be treated before it can be used for 3.4.3.4 Cost potable purposes. The construction of The approximate capital cost for the Camarillo desalters, like the South Las Posas Regional Groundwater Treatment Facility is Desalter, would allow brackish water that is $13,000,000. currently unusable to be used beneficially, increasing water supply reliability, and removing salts through brine disposal outside 3.4.3.5 Integration With Other Projects of the Watershed. This project would be implemented in conjunction with the other desalters (Projects 2, 4, 5, and 6) to improve water quality, reduce dependence on imported water, and increase local water supply reliability. Furthermore, the Groundwater Treatment Facility is dependent upon using the Brineline (Project 1) for disposal of brine waste

3.4.4 Project 4. South Las Posas Basin Regional Desalter The South Las Posas Basin Regional Desalter is proposed by the Ventura County 3.4.4.2 Relationship to Water Waterworks District No. 1 (VCWWD1) and Management Strategies meets all three IRWMP objectives. The South Las Posas Basin Regional Desalter would meet the following water 3.4.4.1 Project Description management strategies: The South Las Posas Basin Regional Water Supply Reliability: By pumping and Desalter would be a 5 mgd brackish treating groundwater for potable use in lieu of groundwater treatment facility. The desalter using imported water, water supply reliability would be located in Moorpark and be owned would be increased and reliance on the use of by VCWWD1. RO treatment technology imported SWP water would be reduced. would be used to produce potable quality water. Brine waste, containing concentrated

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Groundwater Management: Groundwater Estimated Estimated pumping for the South Las Posas Regional Project Phase Start Date Completion Date Desalter would occur as part of overall Planning Completed Completed CEQA April 2006 December 2006 groundwater management activities in the Permitting Not Applicable Not Applicable South Las Posas Basin. The groundwater to Design October 2005 March 2006 be pumped is poor quality groundwater that is Construction January 2008 December 2009 currently largely unusable., The South Las Note: Schedule is contingent upon funding availability. Posas Basin Desalter facilitating beneficial use, provides an improved groundwater 3.4.4.4 Cost management approach and is supported by the FCGMA, who manages the basin. The approximate capital cost for the South Las Posas Basin Regional Desalter is Water Quality Protection and Improvement: $26,000,000. By pumping and treating high salinity groundwater, the project provides a vital of 3.4.4.5 Integration With Other Projects implementation component of the planned salts TMDL in Calleguas Creek. This project would be implemented in Implementation of the TMDL and removal of conjunction with the other desalters (Projects salts from the Watershed would result in 2,3, 5, and 6) to improve water quality, reduce water quality protection and improvement in dependence on imported water, and increase both surface water and groundwater. local water supply reliability. Furthermore, the desalter is dependent upon using the Conjunctive Use: Over the long term, Brineline (Project 1) for disposal of brine pumping and desalting groundwater would waste. facilitate conjunctive use of the groundwater basins by removing poor quality groundwater 3.4.5 Project 5. Somis Desalter and enabling recharge with high quality storm water flows. The Somis Desalter is proposed by the Ventura County Waterworks District No. 19 Desalination: The project would remove (VCWWD19) and meets all three IRWMP dissolved minerals from brackish groundwater objectives. so it can be used as a potable supply source. 3.4.5.1 Project Description Watershed Planning: The South Las Posas Basin Regional Desalter is the result of This Somis Desalter would be a brackish watershed planning and management groundwater treatment facility, similar to the activities in the Calleguas Creek Watershed. South Las Posas Basin Regional Desalter The necessity to remove salts as (Project 4). The Somis Desalter would have a accomplished by the project has been capacity of 2 mgd and be located west of the identified as a High-Priority (short-term) South Las Posas Basin Regional Desalter in Action in the CCWMP. Somis, which is within the service area of VCWWD19. The Somis Desalter is expected Water and Wastewater Treatment: The to be constructed after the South Las Posas project includes treatment of brackish Basin Regional Desalter is completed. RO groundwater for potable use. treatment technology would be used to produce potable quality water. Brine waste, 3.4.4.3 Status and Schedule containing concentrated salts from the RO process, would be discharged to the brineline The table below details the project schedule. and exported out of the Watershed.

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VCWWD19 currently delivers a combination the groundwater to be pumped is poor quality of local groundwater and imported water to its groundwater that is currently largely customers. Imported water is provided by unusable, facilitating beneficial use is an Calleguas. The South Las Posas improved groundwater management Groundwater Basin has been virtually full approach and is supported by the FCGMA, since 1983. Despite the availability of water who manages the basin. and the presence of potential users, the relatively high TDS and chloride Water Quality Protection and Improvement: concentrations in the groundwater require that By pumping and treating high salinity the water be treated before it can be used for groundwater, the project provides a vital potable purposes. The construction of component for implementation of the planned desalters, like the Somis Desalter, would TMDL for salts in Calleguas Creek. allow brackish water that is currently unusable Implementation of the TMDL and removal of to be used beneficially, increasing water salts from the Watershed would result in supply reliability and removing salts through water quality protection and improvement in brine disposal outside of the Watershed. both surface water and groundwater.

Conjunctive Use: Over the long term, pumping and desalting groundwater would facilitate conjunctive use of the groundwater basins by removing poor quality groundwater and enabling recharge with high quality storm water flows.

Desalination: The Somis Desalter would remove dissolved minerals from brackish groundwater so it can be used as a potable supply source.

Watershed Planning: The Somis Desalter is the result of watershed planning and management activities in the Calleguas Creek Watershed. The necessity to remove salts as 3.4.5.2 Relationship to Water accomplished by the project has been Management Strategies identified as a High-Priority (short-term) The Somis Desalter would meet the following Action in the CCWMP. water management strategies: Water and Wastewater Treatment: The Water Supply Reliability: By pumping and project includes treatment of brackish treating groundwater for potable use in lieu of groundwater for potable use. using imported water, water supply reliability would be increased and reliance on the use of 3.4.5.3 Status and Schedule imported SWP water would be reduced. The table below details the project schedule. Groundwater Management: Groundwater pumping for the Somis Desalter would occur as part of overall groundwater management activities in the South Las Posas Basin. As

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Estimated Estimated Start Completion Project Phase Date Date Planning June 2006 May 2007 CEQA April 2007 December 2007 Permitting Not Applicable Not Applicable Design January 2008 December 2008 Construction Not Applicable Not Applicable Note: Schedule is contingent upon funding availability.

3.4.5.4 Cost The approximate capital cost for the Somis Desalter is $1,000,000. This cost covers environmental/CEQA documentation, planning and design, but does not include construction. The West Simi Desalter would be a brackish groundwater treatment facility with a capacity of 3 mgd. Groundwater pumped from the five 3.4.5.5 Integration With Other Projects dewatering wells would be conveyed to a This project would be implemented in central location, where the desalter would use conjunction with the other desalters (Projects RO treatment technology to produce potable 2, 3, 4, and 6) to improve water quality, quality water. Brine waste, containing reduce dependence on imported water, and concentrated salts from the RO process, increase local water supply reliability. would be discharged to the Brineline and Furthermore, the desalter is dependent upon exported out of the Watershed. using the Brineline (Project 1) for disposal of brine waste. VCWWD8 currently delivers imported water, provided by Calleguas, to its customers. Due to its saline quality, the Simi Valley 3.4.6 Project 6. West Simi Groundwater Basin has never been tapped Desalter into as a potential source of potable water by the City. Despite the availability of water and The West Simi Desalter is proposed by the the presence of potential users, the relatively Ventura County Waterworks District No. high TDS and chloride concentrations in the 8/City of Simi Valley (VCWWD8) and meets groundwater require that the water be treated all three IRWMP objectives. before it can be used for potable purposes. The construction of desalters, like the West 3.4.6.1 Project Description Simi Desalter, would allow brackish water that is currently unusable to be used beneficially, VCWWD8 operates five dewatering wells in increasing water supply reliability, and the western portion of the City of Simi Valley removing salts through brine disposal outside to lower the groundwater table and relieve of the Watershed. nuisance water to houses and other occupied structures. Approximately 3 mgd are pumped and discharged to the Arroyo Simi. With 3.4.6.2 Relationship to Water construction of the West Simi Desalter, Management Strategies VCWWD8 could capture this brackish water The West Simi Desalter would meet the for treatment (desalting) and recover the following water management strategies: water for beneficial use as potable water.

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Water Supply Reliability: By pumping and 3.4.6.3 Status and Schedule treating groundwater for potable use in lieu of The table below details the project schedule. using imported water, water supply reliability would be increased and reliance on the use of Estimated Estimated imported SWP water would be reduced. Project Phase Start Date Completion Date Planning Jul 05 Oct 06 Groundwater Management: As the CEQA Jun 06 Dec 06 groundwater to be pumped is poor quality Permitting Jun 06 Dec 06 groundwater that is currently largely Design Oct 06 Jul 07 Construction Nov 07 Mar 09 unusable, facilitating beneficial use is an Note: Schedule is contingent upon funding availability. improved groundwater management approach. 3.4.6.4 Cost Water Quality Protection and Improvement: The approximate capital cost for the West By pumping and treating high salinity Simi Desalter is $6,280,000. groundwater, the project provides a vital component of implementation of the planned TMDL for salts in Calleguas Creek. 3.4.6.5 Integration With Other Projects Implementation of the TMDL and removal of This project would be implemented in salts from the Watershed would result in conjunction with the other desalters (Projects water quality protection and improvement in 2, 3, 4, and 5) to improve water quality, both surface water and groundwater. reduce dependence on imported water, and increase local water supply reliability. Conjunctive Use: Over the long term, Furthermore, the desalter is dependent upon pumping and desalting groundwater would using the Brineline (Project 1) for disposal of facilitate conjunctive use of the groundwater brine waste. basins by removing poor quality groundwater and enabling recharge with high quality storm water flows. 3.4.7 Project 7. VCWWD1 Expansion of Reclaimed Desalination: The West Simi Desalter would remove dissolved minerals from brackish Water Distribution groundwater so it can be used as a potable System supply source. The Expansion of Reclaimed Water Watershed Planning: The West Simi Desalter Distribution System is proposed by VCWWD1 is the result of watershed planning and and would meet the two IRWMP objectives of management activities in the Calleguas Creek reducing dependence on imported water and Watershed. The necessity to remove salts as improving water supply reliability. accomplished by the project has been identified as a High-Priority (short-term) 3.4.7.1 Project Description Action in the CCWMP. The Moorpark Wastewater Treatment Plant (MWTP) is owned and operated by Water and Wastewater Treatment: The VCWWD1. The facility serves the City of project includes treatment of brackish Moorpark and surrounding unincorporated groundwater for potable use. areas. The plant has a secondary treatment capacity of 3.0 mgd and tertiary treatment capacity of up 1.5 mgd. Tertiary treated

Calleguas Creek Watershed Management Plan Addendum Page 46 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc effluent can be reclaimed for beneficial reuse. created for some users. In addition, other Currently, reclaimed water is being provided potable supplies are freed up for potable to one golf course off of Grimes Canyon Rd. purposes. The result is improved use of local However, a Reclaimed Water Feasibility supply, increasing water supply reliability and Study completed in 1990 demonstrated that reducing reliance on the use of imported SWP there is a large additional potential market for water. reclaimed water from the MWTP. Water Quality Protection and Improvement: The project By delivering recycled water for reuse instead is intended of discharging effluent, the project aids to expand implementation of the planned TMDL for salts VCWWD1’s and other constituents in Arroyo Las Posas. reclaimed Implementation of the TMDL and removal of water salts from the Watershed would result in distribution water quality protection and improvement in system to both surface water and groundwater. provide reclaimed Water Recycling: The Expansion of water for Reclaimed Water Distribution System consists use at of recycled water conveyance and distribution agricultural systems for delivery of treated wastewater for and/or additional landscape irrigation reuse reuse for landscape irrigation, agricultural sites in the VCWWD1 service area. The irrigation, and other non-potable purposes. project consists of a single reservoir and pipelines to distribute reclaimed water to Watershed Planning: The VCWWD1 agricultural and nursery customers in the Expansion of Reclaimed Water Distribution service area. The reservoir would replace the System is the result of watershed planning existing reclaimed water storage ponds. The and management activities in the Calleguas pipelines would include approximately 2,065 Creek Watershed. The necessity to remove LF of 8- to 12-inch (North Branch) and 1,500 salts as accomplished by the project has LF of 8-inch (South Branch). The project been identified as a High-Priority (short-term) would also include extending the existing East Action in the CCWMP. Branch pipeline 2,660 LF southward along Hitch Blvd. Water and Wastewater Treatment: The Expansion of the Reclaimed Water The proposed project would enhance Distribution System includes the treatment of VCWWD1’s ability to deliver reclaimed water wastewater to produce recycled water for in lieu of potable water, where possible. non-potable use.

3.4.7.2 Relationship to Water 3.4.7.3 Status and Schedule Management Strategies The following table details the project The Expansion of Reclaimed Water schedule. Distribution System would meet the following water management strategies:

Water Supply Reliability: By making recycled water available for non-potable uses, another drought-proof and constant source of water is

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Estimated Estimated Project Phase Start Date Completion Date Planning Completed Completed CEQA Completed Completed Permitting Not Applicable Not Applicable Design Sept. 2005 Oct. 2005 Construction Jan. 2007 Dec. 2007 Note: Schedule is contingent upon funding availability.

3.4.7.4 Cost The approximate capital cost for the Expansion of the Reclaimed Water Distribution System is $1,075,000.

3.4.7.5 Integration With Other Projects In conjunction with other existing and proposed reclaimed water projects, including Approximately 7,500 feet of 12-inch and Projects 2 and 8, this project would reduce 10,700 feet of 24-inch recycled water demand on potable water, thereby reducing pipelines would be constructed to expand the the Watershed’s dependence on imported existing distribution system to new recycled water and increasing the reliability of the local water users and a new 2 mg recycled water water supply. reservoir. The 12-inch pipeline would connect to the proposed recycled water reservoir at the SVWQCP and proceed westward to 3.4.8 Project 8. Simi Valley properties planned for commercial and mixed Regional Recycled Water uses and a future connection with VCWWD1. The remainder of the 24-inch pipeline would System proceed eastward to supply a second 2 mg The Simi Valley Regional Recycled Water reservoir and the Simi Valley Town Center System is proposed by VCWWD8 and would Mall, where the recycled water would be used meet the two IRWMP objectives of reducing for landscape irrigation. Existing facilities with dependence on imported water and improving potential recycled water demands, such as water supply reliability. Pre-Con Products and California West Ready Mix, would also be served. Another major potential recycled water use is the North Park 3.4.8.1 Project Description Nature Preserve and Village development, The Simi Valley Regional Recycled Water which has a projected recycled water demand System would involve the construction of new of 1,780 AFY. distribution facilities consisting of recycled water pipelines and two new reservoirs that The proposed facilities would deliver tertiary would serve major users within the effluent produced by the SVWQCP. It is VCWWD8’s service area. The project would estimated that almost 2,000 AFY of recycled connect with existing recycled water water could be delivered upon completion of infrastructure, including the Simi Valley Water the project for both existing and planned Quality Control Plant (SVWQCP), a pump future users. station, and a pipeline from the SVWQCP to the Simi Valley Landfill.

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3.4.8.2 Relationship to Water 3.4.8.3 Status and Schedule Management Strategies The following table details the project The Simi Valley Regional Recycled Water schedule. System would meet the following water management strategies: Estimated Estimated Project Phase Start Date Completion Date Water Supply Reliability: By making recycled Planning Completed Completed CEQA July 2005 February 2006 water available for non-potable uses, another 24-inch Pipeline drought-proof and constant source of water is Permitting/Right of July 2005 November 2005 created for some users. In addition, other Way potable supplies are freed up for potable Design July 2005 January 2006 Bidding, Award purposes. The result is improved use of local January 2006 August 2007 and Construction supply, increasing water supply reliability and 12-inch Pipeline reducing reliance on the use of imported SWP Design Dec 2005 May 2006 Bidding, Award water. May 2006 August 2007 and Construction Water Quality Protection and Improvement: Reservoir Permitting/Right of September 2005 December 2005 By delivering recycled water for reuse instead Way of discharging effluent, the project aids Design September 2005 December 2005 implementation of the planned TMDL for salts Bidding, Award January 2006 August 2007 and other constituents in Arroyo Simi. and Construction Implementation of the TMDL and removal of Note: Schedule is contingent upon funding availability. salts from the Watershed would result in water quality protection and improvement in 3.4.8.4 Cost both surface water and groundwater. The approximate capital cost for the Simi Water Recycling: The Simi Valley Regional Valley Regional Recycled Water System is Recycled Water System consists of recycled $9,100,000. water conveyance and distribution systems for delivery of treated wastewater for reuse for 3.4.8.5 Integration With Other Projects landscape irrigation, agricultural irrigation, In conjunction with other existing and and other non-potable purposes. proposed reclaimed water projects, including Watershed Planning: The Simi Valley Projects 2 and 7, this project would reduce Regional Recycled Water System is the result demand on potable water, thereby reducing of watershed planning and management the Watershed’s dependence on imported activities in the Calleguas Creek Watershed. water and increasing the reliability of the local The necessity to remove salts as water supply. accomplished by the project has been identified as a High-Priority (short-term) 3.4.9 Project 9. Conejo Creek Action in the CCWMP. North Fork - Wildwood Water and Wastewater Treatment: The Simi Park Water Management Valley Regional Recycled Water System Enhancement Project includes the treatment of wastewater to produce recycled water for non-potable use. The Conejo Creek North Fork - Wildwood Park Water Management Enhancement Project has been proposed by the Mountains

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Recreation and Conservation Authority upland habitat would offer more onsite water (MRCA) and would meet two IRWMP retention. Small wetlands, in the form of objectives to improve water supply reliability meanders, would be created within the and manage and remove salts. parameters prescribed by a fluvial geomorphologist. The MRCA has a full-time, 3.4.9.1 Project Description staff fluvial geomorphologist, who would oversee the project. The Conejo Creek North Fork - Wildwood Park Water Management Enhancement Project (Wildwood Project) would improve approximately 2,900 feet of the north fork of Conejo Creek. The objectives of the project are to enhance and create wetland habitat, restore a portion of the Conejo Creek Watershed, provide for stormwater capture, increase increasing groundwater recharge and infiltration, and improve water quality from stormwater runoff of the surrounding housing area.

The project site drains approximately 263 acres of residential Improvements on the properties would development. The project would entail include the removal of hard bank sides on the daylighting and dechannelizing the pipe and west side of the channel on VCWPD land and channel on the Ventura County Watershed on the east side of the creek on CRPD land, Protection District (VCWPD) property that the removal of drain pipes, followed by runs between Avenida de los Arboles and regrading and the installation of riprap, Wildwood Avenue. A natural channel would planting native vegetation, and fencing, as be created on the northwestern portion of necessary. Wildwood Park, owned by Conejo Recreation and Park District (CRPD), which would divert This project seeks to create approximately the water directly into the creek on the south five acres of prime riparian woodland habitat. side of Avenida de los Arboles in Wildwood The riparian habitat restoration objectives Park. would be to increase the area and diversity of riparian and riparian-adjacent habitats on the On these two properties, as well as on the site in order to maximize the number and Conejo Open Space Conservation Agency diversity of native bird species breeding or property adjacent to the VCWPD property, otherwise occupying the site. This consists of native vegetation would be planted to create creating a willow-cottonwood riparian riparian and wetland habitat and an upland woodland, including native understory plant habitat buffer. The wetlands and restored species, mature trees, open water, channel would provide increased stormwater shorelines, and adjacent shrub elements, infiltration and improved water quality entering providing varied bird habitat. Wildwood Park. Restoration of disturbed

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Some bird species such as common enhance groundwater recharge and infiltration yellowthroat, song sparrow, spotted towhee, and improve the quality of recharged flows, California towhee, Bewick’s wren, and black- thus increasing water supply reliability and headed grosbeak are expected to colonize, reducing reliance on the use of imported SWP and possibly breed, in the early stages of water. riparian restoration projects such as this one. As the riparian woodland grows, several Flood Management: By restoring the channel woodpecker and hummingbird species could to a more natural condition, flood waters will move in. Several species of hawks (such as be allowed to spread out and infiltrate thus Cooper’s, red-tailed, and red-shouldered) reducing flooding potential. In addition, native could also colonize the site as the woodland plants would be planted. Native plants offer matures even more, as the different hawk better filtering of stormwater and improved species rely on various structural aspects of erosion control, and further decrease flooding trees. potential.

An adaptive management plan has been Groundwater Management: By retaining integrated into the project to monitor and stormwater in a more natural stream channel, adapt post-project operations. Water quality this project would result in reduction of testing would be completed every year at the stormwater related constituents to Conejo upstream and downstream ends of the Creek. These stormwater flows eventually project. Data from the testing would be made percolate into the groundwater basin available on the MRCA website and to all downstream; therefore, improving the other government entities and the public. stormwater quality would also result in improved groundwater quality, which is a goal associated with groundwater management. 3.4.9.2 Relationship to Water Management Strategies Recreation and Public Access: This project The Wildwood Project meets the following would create approximately five acres of water management strategies: prime riparian woodland habitat. Because one project objective would be to maximize Ecosystem Restoration: The Wildwood the number and diversity of native bird Project would plant native vegetation to species breeding or otherwise occupying the create riparian and wetland habitat and an site, the public would be able to enjoy the upland habitat buffer, where there is current benefits of this project by using Wildwood artificial channelization. The necessity for Park. restoration and enhancement of riparian ecosystem as accomplished by this project Stormwater Capture and Management: By has been identified as a High-Priority (short- retaining stormwater in a more natural stream term) Action in the CCWMP. channel, the Wildwood Project would result in reduction of stormwater related constituents Environmental and Habitat Protection and to Conejo Creek. These constituents include Improvement: The Wildwood Project would sediment and associated metals, household create small wetlands, in the form of pesticides and herbicides, bacteria, and other meanders, with one of the objectives of the stormwater contaminants. project being to enhance and create wetland habitat. Water Quality Protection and Improvement: Through reduction of the constituents of Water Supply Reliability: By detaining concern to Conejo Creek, the Wildwood stormwater flows, the Wildwood Project would Project provides a link to implementation of

Calleguas Creek Watershed Management Plan Addendum Page 51 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc the planned TMDLs for nutrients, coliform, 3.4.9.5 Integration With Other Projects sediments and other stormwater constituents This project is directly linked to the Arundo to Calleguas Creek. Implementation of the and Tamarisk Removal Project (Project 10) in TMDL and removal of these contaminants that both involve habitat restoration and from the stormwater would result in water enhancement, as well as improved quality protection and improvement in both stormwater management for the Watershed. surface water and groundwater. Through these efforts, the two projects improve water quality of the Watershed Wetlands Enhancement and Creation: As through means other than conventional described earlier, one of the Wildwood treatment. Project overall objectives would be to enhance and create wetland habitat. 3.4.10 Project 10. Calleguas Conjunctive Use: The restoration of the channel will improve recharge over a larger Creek Watershed area with storm water flows that are of higher Arundo/Tamarisk quality than the native groundwater. Programmatic EIR/EA, NPS Pollution Control: The project would Permits and Pilot include restoration of channels that would Removal Project result in reduced hydrologic peaks allowing The Calleguas Creek Watershed for improved infiltration and the resulting Arundo/Tamarisk Programmatic EIR/EA, water quality improvements from treatment of Permits and Pilot Removal Project has been stormwater constituents in the soil column. proposed by the Ventura County Resource Watershed Planning: The Wildwood Conservation District (VCRCD) and would Project was developed through the watershed meet the IRWMP objective of salts planning process. The Project would provide management and removal improvement. increased stormwater infiltration and improved water quality entering Wildwood Park. 3.4.10.1 Project Description Arundo (Arundo donax) and tamarisk 3.4.9.3 Status and Schedule (Tamarix spp.) are non-native invasive plant The table below details the project schedule. species that pose significant threats to riparian habitats. Under the Calleguas Creek Estimated Estimated Watershed Arundo/Tamarisk Programmatic Project Phase Start Date Completion Date Environmental Impact Report (EIR)/ Planning Completed Environmental Assessment (EA), Permits & CEQA Completed Pilot Removal Project, VCRCD would prepare Permitting Jan 2006 Aug 2006 a programmatic EIR/EA, Design Jan 2006 May 2006 Bidding, Award Sept 2006 Nov 2007 long-term implementation and Construction plan and programmatic Note: Schedule is contingent upon funding availability. permits for arundo and tamarisk removal, as well as implement a pilot 3.4.9.4 Cost arundo and tamarisk The approximate capital cost for the removal project within Wildwood Project is $685,000. the Watershed.

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Arundo is a giant reed native to the Indian 3.4.10.2 Relationship to Water subcontinent and introduced by Spanish Management Strategies settlers to the western United States. The Calleguas Creek Watershed Although historically useful for fencing, Arundo/Tamarisk Programmatic EIR/EA, roofing, and fiber production, the benefits of Permits and Pilot Removal Project meets the arundo do not outweigh its current negative following water management strategies: impacts on local watersheds. Arundo has the capability to spread rapidly, forming large Ecosystem Restoration: The project would contiguous root masses covering several improve riparian habitat by removing invasive acres, effectively crowding out native riparian plants and enabling native plants to vegetation. This results in lower biodiversity of recolonize. The necessity for restoration and plant life, eliminating crucial habitat for birds, enhancement of riparian ecosystem, as fish, and other wildlife that use riparian accomplished by the project, has been waterways. identified as a High-Priority (short-term) Action in the CCWMP. Tamarisk is native to south Environmental and Habitat Protection and Eurasia and was Improvement: The project would remove introduced at the invasive species and allow them be replaced turn of the with native riparian habitat. century for cultivation. It is Flood Management: By removing arundo and an aggressive, tamarisk, native plants would be allowed to woody invasive recolonize. Native plants offer better filtering plant species that is relatively long-lived and of stormwater and improved erosion control, can tolerate a wide range of environmental and decrease flooding potential. conditions once established. It can replace or displace native woody species, such as Groundwater Management: Arundo and cottonwood, willow, and mesquite, which tamarisk are not native to Ventura County and occupy similar habitats, especially when require substantially more water for survival. timing and amount of peak water discharge, These invasive species also increase soil salinity, temperature, and substrate texture salinities. Removal of invasive arundo and have been altered by human activities. tamarisk would increase available Stands of tamarisk generally have lower groundwater for riparian plants and decrease wildlife values compared to stands of native surface soil salinities. Native species also vegetation and have allelopathic effects by provide better stormwater treatment and causing the surface soil to become highly greater detention time for enhanced recharge, saline, thus impeding future colonization by which are goals associated with groundwater many native plant species. management.

Invasive removal would increase available Recreation and Public Access: This project groundwater for riparian plants, improve would create prime riparian woodland habitat riparian habitat, decrease flooding potential, at many locations in the Watershed. This reduce salinization of soils, and decrease fire would result in an increased number and hazard. diversity of native bird species breeding or otherwise occupying the site, the public would be able to enjoy the benefits of this project throughout the Watershed.

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Wetlands Enhancement and Creation: The supply development offers benefits, not just to project would remove invasive species that local resources and habitat, but to the Bay- have crowded out native riparian plants, Delta ecosystem, where Calleguas’ imported improve riparian habitat, and reduce water supply originates. salinization of soils, thereby enhancing valuable freshwater wetlands Through implementation of the IRWMP, three main objectives would be achieved: (1) local Watershed Planning: The project was water supply reliability would be improved, identified through the Watershed planning (2) reliance on imported water would be process for the Calleguas Creek Watershed. decreased, and (3) salts would be removed.

It is important to note that the success of the 3.4.10.3 Status and Schedule objectives is interdependent. That is, water The table below details the project schedule. supply reliability cannot truly be achieved unless the dependence on imported water is Estimated reduced. Similarly, the objective of managing Estimated Completion Project Phase Start Date Date and removing salts requires the coordination Planning 2006 2009 and regional planning efforts developed CEQA 2006 2009 through the process of increasing water Permitting 2006 2009 supply reliability. Finally, the reduction in Design 2007 2009 imported water cannot occur until the local Construction 2007 2009 water supply is being used most efficiently. Note: Schedule is contingent upon funding availability. This requires increasing local water supply reliability and improving local water quality by 3.4.10.4 Cost managing and removing salts. The approximate capital cost for the project is CALLEGUAS CREEK WATERSHED $1,450,000.

Agricultural & Landscape 3.4.10.5 Integration With Other Projects Irrigation

This project is directly linked to the Conejo Imported Water Creek North Fork - Wildwood Park Local Groundwater Management Enhancement Project (Project 9) in that both involve habitat restoration and enhancement, as well as stormwater management for the Watershed. Through these efforts, the two projects Existing Conditions Without IRWMP improve water quality of the Watershed through means other than conventional treatment.

Agricultural & Landscape Irrigation 3.5 Impacts and Benefits Imported Water Calleguas and other water purveyors in the Watershed are taking proactive measures to implement water supply enhancement projects to maximize beneficial use of local water from the Watershed. Increased local Future Conditions With IRWMP

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In order to achieve all three objectives, a citations contained in both Volume I and this regional effort is required. Although individual Volume II – Addendum. These studies and agencies can reduce their own reliance on reports, which are supplemented with other imported water and improve their water work, have been prepared since 1996, when reliability, utilizing a regional approach has the effort to prepare this CCWMP was first enhanced benefits. initiated. These studies and reports document the background and technical Interregional benefits are also realized by feasibility for the proposed projects. reducing the demand for imported water, thus providing additional supply for the Bay-Delta Success would primarily be evaluated through ecosystem and for other water users outside the following methods: the Watershed. 1. A water quality monitoring plan to Furthermore, the Watershed management determine the quantities of salts removed approach utilized in the development and from the Watershed and assess the implementation of the IRWMP is an important impacts of the removals on the objectives. aspect in the maximization of benefits, This monitoring plan is an element of the especially since salt removal and Brineline and may be expanded upon for management for the Watershed must be other projects in the IRWMP. addressed at the watershed level. The 2. Quantification of the local water resources coordination and collaboration efforts of the put to beneficial use as a result of the region’s stakeholders and regulatory agencies IRWMP. allows for the implementation of projects that would benefit the entire Watershed, not just 3. Measurement of the quantity of water one agency’s service area or one population. made available for use to benefit habitat The IRWMP would benefit all communities and agriculture. within the Watershed equally. 4. Documentation of community outreach activities. It is estimated that, with full implementation of the components of the IRWMP, an estimated 30,800 tons of salt would be removed from 3.6.1 Water Quality Monitoring the Watershed annually and over 20,000 AF Plan of local recycled water and groundwater would be beneficially used. The impact of the IRWMP on water quality in the Watershed would be measured by Air quality and energy impacts resulting from monitoring the following: the implementation of the IRWMP have been, or would be, evaluated in the CEQA 1) Discharges to the Brineline documentation for each individual project. The flow of two types of discharges from Mitigation measures identified in the CEQA wastewater treatment plants (WWTPs) and documentation would be incorporated to groundwater treatment facilities to the minimize any negative impacts. Brineline would be important to consider. One type includes those discharges that 3.6 Technical Analysis and currently enter the Watershed, but would be directed into the Brineline instead. Performance Discharges from the WWTPs fall into this The technical basis for this IRWMP can be category. Without the Brineline, these found in the reference list of over sixty five discharges would continue to contribute

Calleguas Creek Watershed Management Plan Addendum Page 55 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc loadings to the Watershed. With the The data obtained from both surface water Brineline, these loadings would be eliminated. and groundwater monitoring can be made The other type includes the groundwater available to the SWRCB’s Surface Water treatment facilities. The groundwater Ambient Monitoring Program (SWAMP) and treatment facilities do not currently exist and, the Groundwater Ambient Monitoring and therefore, do not discharge into the Assessment Program (GAMAP). Watershed. Instead of preventing additional loadings, these facilities would actually remove salts from the Watershed. Water 3.6.2 Measurement of Increase quantity and salt volumes to the Brineline will in Use of Local Water be monitored as described below. Resource 2) Discharges from the Brineline to the The effectiveness of the IRWMP would also ocean be assessed by evaluating any increase in the use of local groundwater and recycled The flow of the discharges through the ocean water supplies and resultant reduction in outfall would be monitored on a continuous imported water use resulting from the basis. Monthly samples would be collected implementation of the IRWMP. The quantity and analyzed for TDS, chloride, sulfate, and of additional local water supply generated boron, and other constituents required by the through the treatment of groundwater sources NPDES permit. The results of this sampling and delivery of recycled water would be and the flow monitoring would enable recorded. This mechanism would be used to quantification of the overall salts removed determine the success of the IRWMP at from the Watershed. These data would be cultivating new local water supplies and used to assess progress toward meeting the reducing the use of imported water in the TMDL loading goals. Watershed.

3) Surface waters and groundwater in the Watershed 3.6.3 Quantification of Water Made Available for Monitoring of surface water and groundwater Beneficial Use in Habitat in the Watershed would be conducted for at least six months prior to operation of the Restoration or Brineline to establish a baseline for Agriculture Monitoring comparison. Once the Brineline has begun operating, monthly sampling of surface water Plan and groundwater would be performed for one The Brineline water would be made available year at the same locations used for baseline for use in wetlands habitat restoration and monitoring. Comparisons would be made agriculture. The water made available for between the baseline monitoring data and the these uses would be demonstrated through data collected after the Brineline start-up to agreements with those entities and determine whether water quality has measurement of water deliveries in the first improved. However, because of the variability year of project operation. It is anticipated that of water quality data, it may not be possible to these uses would increase and be identify discernable changes in surface and quantifiable throughout the life of the project. water groundwater quality after only one year of monitoring. Sampling would continue beyond the end of the grant period to monitor long-term changes in water quality.

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3.6.4 Documentation of Estimated Estimated Community Outreach Start Completion Project Date* Date** Activities 9. Conejo Creek North Fork - 1974 2007 Wildwood Park Water Community outreach activities include Management Enhancement education, implementation of low-runoff Project irrigation projects, and participation in and 10. Calleguas Creek 2000 2009 support of the Calleguas Creek Watershed Watershed Arundo/Tamarisk Committees. Success would be measured Programmatic EIR/EA, Permits & Pilot Removal through development of brochures and Project educational materials, documentation of * Date of initial project study or other documentation programs for water use and runoff reduction, ** Contingent on availability of funding and documentation of meetings and lists of attendees for Watershed meetings at 3.7 Data Management Calleguas. The CCWMP effort to date has resulted in the collection of an extensive amount of data, 3.6.5 Implementation Schedule preparation of numerous reports, and the Summary development of several Geographic Information System (GIS) layers. The The table below summarizes the start and CCWMP has already established a website finish dates for each project found in the where the public can obtain copies of the individual schedules for each project. The various reports (including the TMDL studies), first documentation of the problem leading to meeting times and minutes, GIS information, the project or description of the project has and description of the Watershed been designated as the start date. characteristics. The website is currently being updated to add information and improve Estimated Estimated organization. Start Completion Project Date* Date** Action No. 2 of the CCWMP included the 1. Regional Salinity 2000 2011 development of a data repository. The Management purpose of the action is to develop a Project (Brineline) warehouse of CCWMP information, data, 2. Renewable Water 2004 2010+ Resource Management maps, and planning recommendations so that Program for the Southern public and private entities and interested Reaches of Calleguas Creek stakeholders would have the opportunity to Watershed (RWRMP) work from a common base of information. 3. Camarillo Groundwater 2002 2008 This resource would help the development of Treatment Facility 4. South Las Posas Basin 2005 2009 public and private project design and Desalter implementation of compatible and 5. Somis Desalter 2005 2008+ coordinated actions in land use, facility development, and conservation actions. 6. West Simi Desalter 1984 2009 7. VCWWD 1 Expansion of 1990 2007 Reclaimed Water Distribution The Public Outreach/Education and Land Use System subcommittees would need to work together 8. Simi Valley Regional 1992 2007 to identify a 'gatekeeper' tasked with Recycled Water System maintaining the repository, and identifying long-term funding sources. The

Calleguas Creek Watershed Management Plan Addendum Page 57 g:\eeg\calleguasirwmp\irwmp_r6_060905_cmwd.doc subcommittees would also coordinate with other entities within the Watershed, such entities undertaking activities related to the as the County of Ventura. CCWMP to ensure the data and information being generated is placed in the Watershed 2. Identify and establish a single entity Data Repository and made available. responsible for maintaining the Watershed Data Repository. It is important to Development of a Watershed Data Repository determine the anticipated level of effort can serve many purposes, three of which are required and the appropriate technology described below: and skills the selected entity needs to maintain. For example, the initial 1. It provides a single point of access to Watershed Data Repository functions information resources pertinent to within the context of a standard website. Calleguas Creek, thus simplifying the If an interactive mapping application or process of data collection efforts required database query tool is added to the by individuals and entities interested in repository, additional hardware and conducting various evaluations within the software and the skills to develop and Watershed. manage data within these tools may be required. 2. The information contained within the repository can be used as the basis for 3. Form a Technical Working Group developing public outreach and composed of representatives from the educational materials aimed at improving CCWMP, local jurisdictions and other the public's knowledge and understanding entities developing GIS and database of Watershed processes and issues, and information within the Watershed to what actions they can take to help determine the appropriate applications implement and support various solutions that should be developed within the to these issues. context of the repository for the benefit of everyone working on Watershed-related 3. The repository can be used as a checklist work products and issues. The group in determining if all the necessary may decide that the existing level of effort, information required for a particular which includes a listing of contact technical evaluation exists, in what form, information and the ability to download and who should be contacted about certain datasets and tools, is sufficient obtaining it. and no further development is required. However, the group may also determine Future Watershed Data Repository that additional features may be implementation efforts should focus on at appropriate, in which case they would least three additional issues: need to determine which technologies to utilize and what affects those decisions 1. Determine appropriate data and metadata have on the hosting and management of compliance standards for the the repository. development of spatial and non-spatial data. This effort should be coordinated Placing newly obtained data into the data with the various public agencies and repository has the added benefit of providing entities actively developing data within the a central location to obtain any existing data Watershed. For consistency and cost on the Watershed, which will minimize data effectiveness, an effort should be made to collection efforts for planning agencies and incorporate and adopt existing standards the public. that may have already been developed by

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Additionally, as part of the Brineline, a water quality monitoring program has been established, as discussed in the previous subsection. These surface water and groundwater data can be made available to the SWRCB SWAMP and GAMAP programs.

3.8 Financing

All of the participants in the IRWMP are actively seeking grant and loan funding support from a variety of federal, state, and local sources. Some grant funding has already been obtained, for example, for the Brineline, $2.3 million from the SWRCB Proposition 13 program and 25 percent (to a maximum of $20 million) from the U.S. Bureau of Reclamation. Other funding application efforts are in progress.

Generally, the lead agency would provide the local funding match from other federal and local grants and low-interest loans to the extent possible. The remainder of the local funding match would be financed by the agency’s Capital Improvement Program funds.

Operations and maintenance would generally be funded from the agency’s operations budget. For most projects in the IRWMP, there is a revenue generating stream from the sale of potable or recycled water, which would fund ongoing operations and maintenance efforts.

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Section 4: Relationship to Clean Water Act Section 319 (h) Watershed Management Plan Elements

The relationship to Clean Water Act (CWA) The development of the CCWMP has Section 319 (h) Watershed Management Plan occurred such that these Watershed Elements is described below. Management Plan elements have been addressed as described in the right-hand Section 319 (h) of the CWA identifies the nine column of the table. items in the left hand column of the table below as integral to non-point source (NPS) reduction in a Watershed Management Plan. CWA Section 319 (h) Watershed CCWMP Actions to Comply with CWA Management Plan Elements Section 319(h) 1. An identification of the causes and sources or 1. Causes and sources of water quality issues groups of similar sources that would need to be have been identified in the CCWMP. Salts, for controlled to achieve the load reductions example, are not associated with a single estimated in this Watershed-based plan. source and therefore, can be considered to be NPS. 2. An estimate of the load reductions expected 2. TMDLs under development would address for the management measures described under the load reductions expected of the paragraph (3) below. management measures. Initial estimates of load reductions have been made above. 3. A description of the NPS management 3. NPS management of salts have been measures that would need to be implemented to described above and located within the achieve the load reductions estimated under Watershed. paragraph (2) above and an identification (using a map or a description) of the critical areas in which those measures would be needed to implement the IRWMP. 4. An estimate of the amounts of technical and 4. Cost estimates for technical and financial financial assistance needed, associated costs, assistance have been made in this Addendum and/or the sources and authorities that would be as well as in the CCWMP. relied upon, to implement the IRWMP. 5. An information/education component that 5. A Watershed data repository and public would be used to enhance public understanding education and outreach are integral parts of of the project and encourage their early and the CCWMP implementation. continued participation in selecting, designing, and implementing the NPS management measures that would be implemented. 6. A schedule for implementing the NPS 6. Schedules for the NPS salt management management measures identified in the that is are contained in the project descriptions reasonably expeditious. above.

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CWA Section 319 (h) Watershed CCWMP Actions to Comply with CWA Management Plan Elements Section 319(h) 7. A description of interim, 7. Monitoring of NPS salt and other water measurable milestones for determining whether quality and quantity parameters and adaptive NPS management measures or other control management for some projects are described actions are being implemented. in the projects above. 8. A set of criteria that can be used to determine 8. The progress towards meeting TMDLs whether loading reductions are being achieved would be the criteria by which the success of over time and substantial progress is being the implementation of the CCWMP would be made toward attaining water quality standards measured. and, if not, the criteria for determining whether this Watershed-based plan needs to be revised or, if an NPS Total Maximum Daily Load (TMDL) has been established, whether the NPS TMDL needs to be revised. 9. A monitoring component to evaluate the 9. As described in paragraph (7) above, effectiveness of the implementation efforts over monitoring is an integral component of the time, measured against the criteria established project implementation. under paragraph (8) immediately above.

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References

Bell, G.P., “Ecology And Management Of Valley,” 1992. Prepared for Simi Valley Arundo donax, And Approaches To County Sanitation District. Riparian Habitat Restoration In Southern California. Plant Invasions: Studies from Engineering-Science, “Final Subsequent EIR North America and Europe.” 1997. J. H. for the Simi Valley County Sanitation Brock, Wade, M., Pysek, P., and Green, District Wastewater Reclamation Facilities D. Leiden, The Netherlands, Blackhuys Plan Update, SCH No. 91081033,” 1992. Publishers: 103-113. Prepared for Simi Valley County Sanitation District. Black & Veatch, “City of Camarillo Groundwater Treatment Facility Feasibility Herrera, A. M. a. T. L. D., "Reduction Of Study,” March 2005. Prepared for City of Riparian Arthropod Abundance And Camarillo. Diversity As A Consequence Of Giant Reed (Arundo donax) Invasion,” 2003. Bookman-Edmonston Engineering, Inc., Biological Invasions 5: 167-177. “Salinity Management Study, Final Report,” June 1999. Prepared for Hopkins Groundwater Consultants Inc., Metropolitan Water District of Southern “Preliminary Hydrogeological Study, City California and U.S. Department of the of Camarillo Water Production Interior Bureau of Reclamation. Alternatives Study,” February 2002. Prepared for City of Camarillo. Boyle Engineering, “Reclaimed Water Feasibility Study,” 1990. Prepared for Kennedy/Jenks Consultants, “Regional Ventura County Waterworks District No. 1. Salinity Management Plan,” 1999. Prepared for Calleguas Municipal Water Brown, Norman N., “Shallow Groundwater of District. Eastern Pleasant Valley Basin, Preliminary Draft,” April 26, 2005. Kennedy/Jenks Consultants, “Stochastic Model of Chloride Sources in the California Exotic Pest Plant Council/Team Calleguas Creek Watershed,” September Arundo's (Arundo donax) Workshop 23, 1999. Prepared for FCGMA. Proceedings, available from the Riverside County Regional Park and Open-Space Kennedy/Jenks Consultants, “Lake Water District, P.O. Box 3507, Riverside, CA Supply Feasibility Study, North Park 92519-3507. Nature Preserve and Village,” 2002. Prepared for Calleguas Municipal Water Calleguas Municipal Water District, “Final District. Urban Water Management Plan,” December 2000. Kennedy/Jenks Consultants, “Water Production Alternatives Study, Final Draft Engineering-Science, “Facilities Plan Update Report,” February 2003. Prepared for City for Wastewater Reclamation in Simi of Camarillo.

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Kennedy/Jenks Consultants, “NPDES Permit Perliter & Ingalsbe, “Regional Brine Lines Application Report, Regional Salinity Sizing and Alignment Study,” 2000. Management Program,” October 2003. Prepared for Calleguas Municipal Water Prepared for Calleguas Municipal Water District. District. Perliter & Ingalsbe, “Technical Memoranda, Kennedy/Jenks Consultants, “Conceptual Oxnard Plain Brine Line Phase 1c and Membrane Treatment Facility for Wells A Ocean Outfall Facility,” June 2004. and B,” May 2004. Prepared for City of Prepared for Calleguas Municipal Water Camarillo. District.

Kennedy/Jenks Consultants, “Conceptual Rosen, Donald G., “Groundwater Wellfield Production and Moorpark Demineralization Study,” 1984. Prepared Desalter Facilities Planning,” 2005. for the City of Simi Valley. Prepared for Ventura County Waterworks District No. 1. Schoenberg, Clinton, Moorpark College, “Biological Impact Study North Fork Kennedy/Jenks Consultants, “Feasibility Conejo Creek,” 1974. Evaluation of Delivery of Brine Line Water to Ventura County Game Preserve,” June Skei, Rorie, “Environmental Feasibility 2005. Prepared for Calleguas Municipal Analysis of the Arroyo Conejo Canyon Water District. and Tributaries,” 1977.

Larry Walker Associates, prepared by Southern California Association of Mysliwiec, Mitchell, Ph.D., “Estimates of Governments, "State of the Region 2004 Flowrates in the Conejo Creek System Measuring Regional Success," 2004. Post Project Implementation,” draft technical memorandum, May 18, 2004. Thousand Oaks Planning Department, “Conejo Canyons Study,” 1976. Larry Walker Associates , Various Studies Completed as part of the Calleguas Creek U.S. Geological Survey, prepared by Gail Characterization Study. Cordy & Herman Bouwer, “Where do the salts go? The potential effects and Leighton & Associates, “Simi Valley West End management of salt accumulation in Groundwater Study,” 1985. Prepared for south-central Arizona,” Fact Sheet 170- the City of Simi Valley. 98, June 1999.

Lovich, J., “Tamarisk. Invasive Plants of Woodward-Clyde Consultants, “Final California's Wildlands,” 2000. Bossard, Environmental Impact Report, Moorpark Randall and Hoshovsky. University of Wastewater Treatment Plant, Reclaimed California Press. Berkeley. Water Distribution System, SCH No. 96021009,” April 1997. Prepared for Padre Associates, “Final Program Ventura County Waterworks District No. 1. Environmental Impact Report/ Environmental Assessment for the Woodward-Clyde Consultants, “Perched Zone Calleguas Regional Salinity Management Study for a Portion of the Pleasant Valley Project,” August 2002. Prepared for Groundwater Basin (Phase I),” July 1997. Calleguas Municipal Water District.

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Zouhar, K., “Tamarisk spp.,” 2003, U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Center, Fire Sciences Laboratory.

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Appendix A

Adoption Resolutions

Summary of Agency Adoption of IRWMP

Agency Name Adoption Date Calleguas Municipal Water District City of Camarillo City of Simi Valley/Ventura County Waterworks District No. 8 City of Thousand Oaks Camrosa Water District Ventura County Waterworks District No. 1/ Ventura County Waterworks District No. 19 Mountains Recreation and Conservation Authority Ventura County Resource Conservation District

Resolutions of adoption follow this summary.

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