AGUA MANSA SEWER FORCEMAIN PROJECT Initial Study/Mitigated Negative Declaration
City of Colton Public Works Department 160 S. 10th Street Colton, Ca 92324 (909) 370-5065
CITY OF COLTON
TABLE OF CONTENTS
1. Executive Summary 1.1 Introduction 3 2. Project Description 2.1 Project Data 5 2.2 Project Location and Description 6 2.3 Areas of Known Controversy 7
3. Initial Study 3.1 Environmental Factors Potentially Affected 11 3.2 Environmental Checklist I. Aesthetics 14 II. Agriculture Resources 16 III. Air Quality 18 IV. Biological Resources 23 V. Cultural Resources 26 VI. Geology, Soils, and Seismicity 28 VII. Hazards and Hazardous Materials 31 VIII. Hydrology and Water Quality 35 IX. Land Use and Land Use Planning 43 X. Mineral Resources 44 XI. Noise 45 XII. Population and Housing 48 XIII. Public Services 49 XIV. Recreation 50 XV. Transportation and Traffic 51 XVI. Utilities and Service Systems 53 XVII. Mandatory Findings of Significance 57
Appendix A
SEWER IMPROVEMENT PLANS A-1
List of Figures
1.1 Regional Location Map 8 1.2 Project Location Map 9 1.3 Site Plan 10
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1 Executive Summary
1.1 Introduction A. Purpose of an Initial Study
The California Environmental Quality Act (CEQA) was enacted in 1970 for the purpose of providing decision-makers and the public with information regarding environmental effects of proposed projects; identifying means of avoiding environmental damage; and disclosing to the public the reasons behind a project’s approval even if it leads to environmental damage. The City of Colton has determined the proposed project is subject to CEQA and no exemptions apply. Therefore, the preparation of an Initial Study (IS) is required.
An Initial Study is a preliminary analysis conducted by the lead agency, in consultation with other agencies (responsible or trustee agencies, as applicable), to determine whether there is substantial evidence that a project may have a significant effect on the environment. If the initial study concludes that the project, with mitigation, may have a significant effect on the environment, an Environmental Impact Report (EIR) should be prepared; otherwise the lead agency may adopt a Negative Declaration (ND) or Mitigated Negative Declaration (MND).
The IS/ND contained herein has been prepared in accordance with CEQA (Public Resources Code §21000 et seq.), the State CEQA Guidelines (Title 14, California Code of Regulations, §15000 et seq.).
B. Document Format
This document is organized into four sections as follows:
Section I, Introduction: provides an overview of the project and the CEQA environmental documentation process.
Section II, Background Information Provides a description of the project location, project background, project components, and proposed construction and operation. Provides a description of the existing environmental setting with focus on features of the environment, which could potentially affect the proposed project or be affected by the proposed project.
Section III, Environmental Effects/Initial Study Checklist: presents the City’s Checklist for all impact areas and mandatory findings of significance. Includes discussion and identifies applicable mitigation measures.
Section IV, Mitigation Measures: provides the mitigation measures that would be implemented to ensure that potential adverse impacts of the proposed project would be reduced to a less than significant level.
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Section V, Determination – Recommended Environmental Documentation: provides the recommended environmental documentation for the proposed project.
C. CEQA Process
Once the adoption of a MND has been proposed, a public comment period opens for no less than twenty (20) days, or thirty (30) days if there is state agency involvement. The purpose of this comment period is to provide public agencies and the general public an opportunity to review the initial study and comment on the adequacy of the analysis and the findings of the lead agency regarding potential environmental impacts of the proposed project. If a reviewer believes the project may have a significant effect on the environment, the reviewer should (1) identify the specific effect, (2) explain why it is believed the effect would occur, and (3) explain why it is believed the effect would be significant. Facts or expert opinion supported by facts should be provided as the basis of such comments.
After the close of the public review period, Public Works considers the MND, together with any comments received during the public review process, and makes a recommendation to the City Council on whether or not to approve the project. One or more Council committees may then review the proposal and documents and make its own recommendation to the full City Council. The City Council is the decision-making body and also considers the MND, together with any comments received during the public review process, in the final decision to approve or disapprove the project. During the project approval process, persons and/or agencies may address either the Public Works or the City Council regarding the project. Public notification of agenda items for the Board of Public Works, Council committees and City Council is posted 72 hours prior to the public meeting. The City Council Agenda is available via the internet at http://www.ci.colton.ca.us/a/PublishedMeetings.htm. The Council agenda can be obtained by visiting the Office of the City Clerk at City Hall, 650 N. LA Cadena Drive, Colton Ca 92324.
If the project is approved, the City will file a Notice of Determination with the County Clerk within 5 days. The Notice of Determination will be posted by the County Clerk within 24 hours of receipt. This begins a 30-day statute of limitations on legal challenges to the approval under CEQA. The ability to challenge the approval in court may be limited to those persons who objected to the approval of the project, and to issues presented to the lead agency by any person, either orally or in writing, during the public comment period.
As a covered entity under Title II of the Americans with Disabilities Act (ADA), the City of Colton does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services, and activities.
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2 Background Description
2.1 Project Data
a) Project Title: Agua Mansa Sewer Force Main Project
b) Lead Agency Name and Address: City of Colton 650 North La Cadena Drive Colton, CA 92324
c) Contact Person and Phone Number: Amer Jakher - Public Works Director/ City Engineer Phone: (909) 370-5065
d) Project Location: Sanitary sewer alignments within the City of Colton along Agua Mansa Road between Riverside Avenue and Rancho Avenue.
e) Project Sponsor’s Name and Address: City of Colton 650 North La Cadena Drive Colton, CA 92324
f) Summary of Project: Installation of 12,000 linear feet of 8-inch PVC sewer force main along Agua Mansa Road within the existing right-of-way. The proposed sewer project would connect to the waste water treatment plant owned by and located within the City of Colton on the south side of the Agua Mansa Road and west of Rancho Avenue
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2.2 Project Description
Project Location
The project is located along Agua Mansa Road between Riverside Avenue and Rancho Avenue within the City of Colton. The project is located in the Inland Empire region of the state of California and is approximately 57 miles east of Los Angeles. The project area is predominantly industrial industry and vacant lands. Within the south side vicinity of the project site is the Santa Ana Watershed Project Authority Municipal Treatment Plant, City of Rialto sewer lift station on the north side, Industrial and Commercial businesses on the West Side and residential residences to the east side.
Project Description
The proposed project involves installation of approximately 12,000 linear feet of 8- inch PVC sewer force main along Agua Mansa Road. This proposed line will be connected to the existing sewer force main and lift station owned by City of Colton located at Riverside Avenue. The proposed project would direct all the flow from the southwest end area of the municipality to the existing City of Colton Water Treatment Plant located at Rancho Avenue. The project plans are provided in Appendix A of this Initial Study
This improvement project consists of the installation and/or replacement of sanitary sewer line within the right-of-way of Agua Mansa Road between Riverside Avenue and Rancho Avenue. The majority of the pipeline construction will be performed using an open-cut trenching and auger boring. The proposed sewer line will convey the liquid and solid sewage from the existing Riverside Avenue line and to Agua Mansa Road west towards the Rancho Avenue sewer line.
Project Construction
Construction is expected to last approximately six months. During project construction, vehicle traffic flow would be maintained at all times.
Equipment used during construction would include the following:
• Drill rig (to drill piles for • Dump trucks excavation) • Water truck • Concrete/ Asphalt trucks • Backhoe • Concrete pump truck (to fill • Concrete saw drilled holes) • Whacker/Compaction • Excavator equipment • Crane (to lower equipment and • Grader materials into holes) • Paver
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Drilling & Excavation The first part of construction would involve relocating any interfering utilities. Excavation and shoring at the intersection of Agua Mansa Road and Riverside Avenue would then occur.
Approximately 2,500 cubic yards (cy) of soil would be excavated throughout the duration of the project. Excavated material would be hauled to a staging area and will be used as backfill upon completion of project construction activities.
Street Construction The final stage of construction would be street construction. New asphalt will be installed along the 5’ wide trench per City of Colton standard 124.
Operation and Maintenance Upon completion of construction, the ongoing operation of the sewer would allow wastewater to move through the collection systems with fewer obstructions. Existing maintenances holes located up and downstream from the sewer line would be used to access the facilities and conduct regularly scheduled maintenance activities and repairs.
Existing Land Uses
General Plan Designation: Specific Plan Area Community Plan: Agua Mansa Industrial Corridor Land Use Designation: Specific Plan Area Zoning: Specific Plan Area Use Regulation: Utility Facility
(Figure 1.2)
North: Office and Professional, Industrial, East: Industrial, Residential Residential
West: Office and Professional, Industrial, South: Municipal Facility Residential
2.3 Areas of Known Controversy
Through this process, no key issues or areas of controversy were identified. The CEQA analysis provided mitigation measures that reduced potentially significant impacts to less than significant.
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Figure 1.1 Regional Location Map
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Figure 1.2 Project Location Map
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Figure 1.3 Site Plan
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3 Initial Study
3.1 Environmental Factors Potentially Affected The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a "Potentially Significant Impact" as indicated by the checklist on the following pages.
Aesthetics Agriculture Resources Air Quality
Biological Resources Cultural Resources Geology / Soils
Hazards & Hazardous Hydrology / Water Quality Land Use / Materials Planning Mineral Resources Noise Population / Housing Public Services Recreation Transportation / Traffic Utilities / Service Systems Mandatory Findings of Significance
Determination (To be completed by the Lead Agency): On the basis of this initial evaluation: I find that the proposed project COULD NOT have a significant effect on the environment, and a NEGATIVE DECLARATION will be prepared.
9 I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because revisions in the project have been made by or agreed to by the project proponent. A MITIGATED NEGATIVE DECLARATION will be prepared.
I find that the proposed project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required.
I find that the proposed project MAY have a "potentially significant" or "potentially significant unless mitigated" impact on the environment, but at least one effect 1) has been adequately analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by mitigation measures based on the earlier analysis as described on attached sheets. An ENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remain to be addressed.
I find that although the proposed project could have a significant effect on the environment, because all potentially significant effects (a) have been analyzed adequately in an earlier EIR or NEGATIVE DECLARATION pursuant to applicable standards, and (b) have been avoided or mitigated pursuant to that earlier EIR or NEGATIVE DECLARATION, including revisions or mitigation measures that are imposed upon the proposed project, nothing further is required.
Signature Date
Amer Jakher Public Works Director Printed Name Title
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EVALUATION OF ENVIRONMENTAL IMPACTS:
1) A brief explanation is required for all answers except "No Impact" answers that are adequately supported by the information sources a lead agency cites in the parentheses following each question. A "No Impact" answer is adequately supported if the referenced information sources show that the impact simply does not apply to projects like the one involved (e.g. the project falls outside a fault rupture zone). A "No Impact" answer should be explained where it is based on project-specific factors as well as general standards (e.g. the project will not expose sensitive receptors to pollutants, based on a project-specific screening analysis).
2) All answers must take account of the whole action involved, including off- site as well as on-site, cumulative as well as project-level, indirect as well as direct, and construction as well as operational impacts.
3) Once the lead agency has determined that a particular physical impact may occur, then the checklist answers must indicate whether the impact is potentially significant, less than significant with mitigation, or less than significant. "Potentially Significant Impact" is appropriate if there is substantial evidence that an effect is significant. If there are one or more "Potentially Significant Impact" entries when the determination is made, an EIR is required.
4) "Negative Declaration: Less Than Significant With Mitigation Incorporated" applies where the incorporation of mitigation measures has reduced an effect from "Potentially Significant Impact" to a "Less than Significant Impact." The lead agency must describe the mitigation measures, and briefly explain how they reduce the effect to a less than significant level (mitigation measures from Section XVII, "Earlier Analyses," may be cross-referenced).
5) Earlier analyses may be used where, pursuant to the tiering, program EIR, or other CEQA process, an effect has been adequately analyzed in an earlier EIR or negative declaration. Section 15063(c)(3)(D). In this case, a brief discussion should identify the following:
a) Earlier Analyses Used. Identify and state where they are available for review.
b) Impacts Adequately Addressed. Identify which effects from the above checklist were within the scope of and adequately analyzed in an earlier document pursuant to applicable legal standards, and state whether such effects were addressed by mitigation measures based on the earlier analysis.
c) Mitigation Measures. For effects that are "Less than Significant with
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Mitigation Measures Incorporated," describe the mitigation measures which were incorporated or refined from the earlier document and the extent to which they address site-specific conditions for the project.
6) Lead agencies are encouraged to incorporate into the checklist references to information sources for potential impacts (e.g. general plans, zoning ordinances). Reference to a previously prepared or outside document should, where appropriate, include a reference to the page or pages where the statement is substantiated.
7) Supporting Information Sources. A source list should be attached, and other sources used or individuals contacted should be cited in the discussion.
8) This is only a suggested form, and lead agencies are free to use different formats; however, lead agencies should normally address the questions from this checklist that are relevant to a project's environmental effects in whatever format is selected.
9) The explanation of each issue should identify:
a) the significance criteria or threshold, if any, used to evaluate each question; and
b) the mitigation measure identified, if any, to reduce the impact to less than significance.
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3.2 Environmental Checklist
Issues (and Supporting Information Sources):
Potentially Significant Impact Less Than Significant with Mitigation Incorporation Less Than Significant Impact No Impact
AESTHETICS
Setting
The visual/aesthetic character of the proposed pipeline alignments is that of paved roadways within typical urban settings. Photos of the proposed pipeline alignments are presented.
Riverside Avenue is a four lane roadway with center median island, lined primarily with commercial uses. Trees and landscaping grow within portions of the roadway shoulders and median island.
Agua Mansa Road is a two to four lane roadway with a painted center median along most portions of the proposed alignment.
Rancho Avenue is a four lane roadway with a painted median island, lined primarily with commercial uses.
Less Than Potential Significant ly With Less Than Significa Mitigation Significa No nt Incorporat nt Impa Issues: Impact ed Impact ct
I. AESTHETICS. Would the project:
a) Have a substantial adverse effect on a scenic vista?
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Less Than Potential Significant ly With Less Than Significa Mitigation Significa No nt Incorporat nt Impa Issues: Impact ed Impact ct
b) Substantially damage scenic resources, including, but not limited to, tress, rock outcroppings, and historic buildings within a State scenic highway?
c) Substantially degrade the existing visual character or quality of the site and its surroundings?
d) Create a new source of substantial light or glare which would adversely affect day or nighttime views in the area?
e) Increase the amount of shade or private open space on adjacent sites
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Discussion a) The proposed project site is on an existing roadway. Scenic vistas in the area are generally of distant mountains, while the project would principally be confined to existing roadways. Additionally, the project would primarily be limited to the construction of underground sewer lines and connections with small structures as needed. (e.g., house to lift station equipment). Given that project components will essentially be installed underground, no scenic vistas would be substantially be affected. b) The existing project site is not directly located along any state scenic highways. The closest eligible highway is State Route 2 (SR-2), which is approximately 53 miles from the project site. In addition, there are no historic resources such as buildings, rock outcroppings, or heritage trees on the project site. Accordingly, there will be no significant impact to scenic resources. c) The existing project site is located within a residential and industrial neighborhood that contains single-family homes, municipal facilities, and industrial fabricating facilities. The views to the west include an industrial facility; to the east are single-family homes; to the north are vacant County of San Bernardino Facility; and to the south are industrial facilities. The expected duration of the project is approximately six months. Thus, the visual impacts associated with the proposed demolition and site preparation are temporary, as they will cease upon completion of the activities. The proposed project is compatible with surrounding uses and buildings. It is concluded that the project will not have an effect on the overall visual character of the project site and general vicinity. d) Currently, the sources of light or glare on the project site are low levels of nighttime lighting associated with vehicle headlights during evening hours. There will be no light or glare associated with the proposed demolition and site preparation due to daytime construction hours. Therefore, there will be no increase of light and glare in the project area as compared to existing conditions. No impact will occur. e) The proposed project site is on an existing roadway. There will be less than significant impact on Increase the amount of shade or private open space on adjacent sites.
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AGRICULTURAL AND FOREST RESOURCES
Setting
In California, agricultural land is given consideration under CEQA. According to Public Resources Code §21060.1, “agricultural land” is identified as prime farmland, farmland of statewide importance, or unique farmland, as defined by the U.S. Department of Agriculture land inventory and monitoring criteria, as modified for California. CEQA also requires consideration of impacts on lands that are under Williamson Act contracts.
CEQA requires the evaluation of forest and timber resources where they are present. The project site is located in an urban area that has been historically used for residential and public right-of-way. The site does not contain any forest land as defined in Public Resources Code section 12220(g), timberland as defined by Public Resources Code section 4526, or property zoned for Timberland Production as defined by Government Code section 51104(g).
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
II. AGRICULTURE RESOURCES. In determining whether impacts to agricultural resources are significant environmental effects, lead agencies may refer to the California Agricultural Land Evaluation and Site Assessment Model (1997) prepared by the California Dept. of Conservation as an optional model to use in assessing impacts on agriculture and farmland. Would the project: a) Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to non-agricultural use?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact b) Conflict with existing zoning for agricultural use, or a Williamson Act contract? c) Involve other changes in the existing environment which, due to their location or nature, could result in conversion of Farmland, to non-agricultural use?
Discussion a) Currently, the project site does not support agricultural land uses nor are any agricultural practices occurring in the immediate vicinity of the project area. The proposed project site does not contain areas designated as farmland and is not enrolled under the Williamson Act contract. The proposed project site is located in an urban setting zoned for industrial and residential uses. Therefore, the proposed project will not conflict with existing agricultural zoning uses; therefore, no impacts will occur as a result of the demolition project. b) According to the General Plan, the project site is not located within any areas designated either Prime Farmland, Unique Farmland, or Farmland of Statewide Importance according to the California Resources Agency. There is no opportunity for the project to affect these particular lands. c) According to the General Plan, the project site is not located within any areas affected by any Williamson Act contract. There is no opportunity for the project to affect these particular lands. d) According to the General Plan, the project site is not located within any areas designated as Farmland. There is no opportunity for the project to convert any farmland to a non-agricultural use.
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AIR QUALITY
Setting
Air quality is regulated by several agencies, including the United States Environmental Protection Agency (USEPA), the California Air Resources Board (CARB), and the South Coast Air Quality Management District (SCAQMD). At the federal level, the USEPA is responsible for implementation of the Federal Clean Air Act (CAA) and establishing the National Ambient Air Quality Standards (NAAQS).The CARB promulgates ambient standards for California referred to as the California Ambient Air Quality Standards (CAAQS). Ambient standards have been established for the following criteria pollutants: ozone (O3), particulate matter less than 10 microns in diameter (PM10) and less than 2.5 microns in diameter (PM2.5), carbon monoxide (CO), nitrogen oxides (NOx), Sulfur dioxide (SOx), and lead. The proposed project is located in the South Coast Air Basin (Basin), and the SCAQMD is the regional agency responsible for implementing regulations governing emissions of air pollution for this area. A project conflicts with or obstructs implementation of the applicable air quality plan if the project is incompatible with SCAQMD and the Southern California Association of Governments (SCAG) air quality policies. A project will conflict with SCAQMD and SCAG policies if it:
• causes an increase in the frequency or severity of existing air quality violations; • causes or contributes to new air quality violations; • delays timely attainment of air quality standards or the interim emission reductions specified in the SCAQMD’s Air Quality Management Plan (AQMP); or • exceeds the assumptions utilized in the SCAQMD’s AQMP.
The Basin is a nonattainment area that does not meet established ambient air quality standards for O3 (for both the 1-hour and 8-hour standards), PM10, and PM2.5. The CAA sets certain deadlines for meeting the NAAQS within the Basin including: 1-hour O3 by the year 2010; 8-hour O3 by the year 2021; and PM2.5 by the year 2015. The SCAQMD has developed strategies for reducing emissions and complying with applicable standards, as identified in its recently updated 2007 AQMP. The 2007 AQMP aims to define southern California’s comprehensive strategy to improve air quality as expeditiously as possible. The 2007 AQMP is designed to meet both state and federal CAA planning requirements for all areas under SCAQMD jurisdiction. The 2007 AQMP focuses on reduction strategies for O3 and PM2.5. The AQMP sets forth procedures for measurements, control strategies, and air quality modeling. A consistency determination plays an essential role in local agency project review by linking local planning and unique individual projects to the air quality plans. It fulfills the CEQA goal of fully informing local agency decision makers of the Agua Mansa Sewer Force Main Project Page 19
CITY OF COLTON environmental costs of the project under consideration at a stage early enough to ensure that air quality concerns are addressed. Only new or amended General Plan elements, Specific Plans, and significantly unique projects need to undergo a consistency review due to the air quality plan strategy being based on projections from local General Plans.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
III. AIR QUALITY. Where available, the significance criteria established by the applicable air quality management or air pollution control district may be relied upon to make the following determinations. Would the project: a) Conflict with or obstruct implementation of the applicable air quality plan? b) Violate any air quality standard or contribute substantially to an existing or projected air quality violation? c) Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is nonattainment under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors)?
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d) Expose sensitive receptors to substantial pollutant concentrations?
e) Create objectionable odors affecting a substantial number of people?
Discussion a) The proposed project is consistent with the Specific Plan and Zoning Designation for the project site. Since designations are consistent with the current Specific Plan, implementation of the project will not require any amendments to the City’s zoning designations for the project site. Therefore, the proposed project would be within the City’s Specific Plan projection. The project is consistent with the adopted SCAQMD AQMP.
The Air Quality Management Plan (AQMP) for the South Coast Air Basin (SCAB) has underlying plans for mobility, infrastructure development, population, housing, employment and land use, and provides the benchmark by which individual development project consistency with air quality planning objectives would be judged. Development projects relate to the air quality planning process through the growth forecasts that were used as inputs into the regional transportation model.
An infrastructure improvement project, such as the proposed Agua Mansa Sewer Project, is not directly related to the air quality planning process because the project does not involve new development. Conformity with adopted plans, forecasts, and programs relative to population, housing, employment and land use is the primary measuring device by which impact significance of planned growth is determined. If a given project incorporates applicable direct source and transportation control measures, and if the scope and phasing of a project is consistent with adopted forecasts as shown in SCAG’s Regional Comprehensive Plan and Guide (RCP), then the regional air quality impact of the development project is not considered significant. Construction of the proposed sewer main does not involve an increase in population, housing, or employment and does not directly relate to the AQMP in that there are no specific air quality programs or regulations governing infrastructure projects.
Construction of the proposed sewer main is not subject to specific SCAQMD regulations, although compliance with SCAQMD regulations for fugitive dust emissions, construction equipment, and asphalt paving would be required during the construction phase of the project. The project would not conflict
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and is not inconsistent with the AQMP of the SCAQMD. The project would incorporate measures to reduce short term construction emissions, in accordance with SCAQMD regulations and therefore the project would have no significant adverse impacts on regional air quality. The proposed sewer installation project would not conflict or obstruct implementation of the AQMP. b) The City of Colton is located within a portion of the SCAB designated as a non-attainment area for ozone, PM10 and PM2.5 under state standards, and as a none attainment area for ozone, PM10, and PM2.5 under Federal standards.
The SQMAD has also established thresholds of significance for various air quality pollutants. There are:
SCAQMD Air Quality Significance Thresholds Mass Daily Thresholds Pollutant Construction Operation NOx 100 lbs/day 55 lbs/day VOC 75 lbs/day 55 lbs/day PM10 150 lbs/day 150 lbs/day PM2.5 55 lbs/day 55 lbs/day SOx 150 lbs/day 150 lbs/day CO 550 lbs/day 550 lbs/day Lead 3 lbs/day 3 lbs/day Source: SCAQMD Air Quality Significance Theresholds CEQA Air Quality Handbook
Projects that exceed these thresholds are considered to have a significant impact on air quality. Operation of the proposed sewer main would not lead to an increase in the emission of pollutants for which the basin is currently in non-attainment or exceed existing operational thresholds. An operational sewer main is not typically regarded as a generator of air quality contaminants. However, construction of the proposed sewer main installation would generate emissions that may temporarily affect regional air quality by contributing additional levels of O3, PM2.5, and PM10. These pollutants would not surpass SCAQMD significance thresholds for construction as indicated in Table 2, Estimated Construction Emissions. However, these pollutants would result in an increase of criteria pollutants for which the project region is non-attainment under federal and state ambient air quality standards.
The use of construction equipment for the installation of the sewer main would lead to short term emissions, which could add to local air pollution levels. Heavy equipment may be expected to operate during excavation, installation, and finishing operations and may include excavators, backhoes, Agua Mansa Sewer Force Main Project Page 22
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rollers, cranes, trucks, and/or hydraulic lifts. Operation and application of these machines could temporarily increase air pollutant levels in the vicinity of the site through emissions from exhaust systems. In addition, emissions from delivery and haul trucks, construction crew vehicles, small plant, ant other off-site vehicle trips would add to short term and localized increases in pollutant levels. Construction activities also generate evaporative emissions of volatile organic compounds (VOC) from solvents, asphalt, and other coatings.
To estimate construction emissions, the latest SCAQMD URBEMIS 2007 model was used, version 9.2.4. It was assumed that one bore/drill rig, one excavator, one truck, one loader, one dozer, and one trencher would be utilized to prepare the site for installation of the new trunk sewer main. During installation, one concrete industrial saw and one forklift would accompany the equipment used to prepare the site. During the final stages of construction, pavers, rollers, concrete, and surface equipment would replace the on-site equipment during the paving stages. Construction estimates assume a worst case scenario of trenching a 25 foot wide strip along the entire length of the project alignment. Furthermore, an estimated 12,000 feet of paved roadway is expected to be disturbed along that 2.5 mile length. Again, assuming a worst-case estimate of a 25 foot wide strip along that length, approximately 2.5 miles of local streets may be repaved as they may be disturbed during installation of the new line. Estimates of construction emissions are provided in Table 2, Estimated Construction Emissions. The worst-case scenario utilizing the equipment during preparation (excavation) and paving stages are used in the emission calculations below.
TABLE 2 ESTIMATED CONSTRUCTION EMMISIONS (LBS/DAY) EXCAVATION/PAVING ROG NO x CO SO x PM10 PM2.5 TOTALS (lbs/day unmitigated) 7.25 61.02 30.07 0.01 62.28 14.2 TOTALS (lbs/day mitigated) 7.25 51.89 30.07 0.01 15.43 4.41
SCAQMD THRESHOLD 55 100 550 150 150 55 Assumes continued use during 8-hour workday
Based upon the above estimates, construction equipment emissions would not exceed SCAQMD thresholds. However, construction equipment activities would result in an increase of criteria pollutants, including PM10 and PM2.5, for which the project region is non-attainment under federal and state ambient air quality standards.
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In order to ensure the project does not substantially contribute pollutants for which the region is in nonattainment, the following mitigation measures for construction emission impacts are recommended.
Incorporation of the recommended mitigation measures during the construction and operation phases of the project will ensure that no air quality standards are violated and no significant contributions to an existing or projected air quality violation occurs. This impact is considered less than significant with mitigation and no further analysis is mandated. c) Construction equipment emissions would be generated during the construction of the project. Construction of the proposed sewer main would generate emissions that may temporarily affect regional air quality by contributing additional levels of O3, PM2.5, and PM10. This impact would be considered short-term in nature. No long-term operational emissions would be expected from the proposed sewer main. Therefore, the project’s contribution to cumulative impacts would be negligible and temporary and are expected to be less than significant. Construction impacts would also be reduced by the implementation of mitigation measures, including dust control and construction-related emission control measures, as outlined in Mitigation Measures Air 1, Air 2 through Air 8. Any cumulative increase in air pollutants or ozone levels in the project area would be less than significant. d) Land uses which are considered sensitive air quality receptors include long- term health care facilities, rehabilitation centers, convalescent centers, retirement homes, residences, schools, playgrounds, child care centers, and athletic facilities. Non-residential receptors located along the proposed sewer main alignment include San Salvador School (0.26 miles east).
Varying density residential areas are also found in proximity to the majority of the proposed sewer main alignment, with the exception of the segment contained within the San Salvador School area and isolated commercial and industrial zones. These residential areas would be considered sensitive receptors and could be exposed to construction related or quality emissions. Given the distance from nearby sensitive receptors, construction emissions would expose sensitive receptors to pollutant concentrations. However, as noted, construction emissions would not exceed allowable SCAQMD thresholds for pollutant criteria. Further, construction activities and associated emissions would be short-term. Provided this, and incorporating Mitigation Measures Air 1 through Air 2 into construction activities, exposure of sensitive receptors to substantial pollutant concentrations is not probable. Implementation of applicable mitigation measures would reduce exposure of sensitive receptors, including adjacent residential areas and the school, to less than significant levels of pollutant concentrations. This impact is considered less than significant with mitigation and no additional analysis is required.
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e) Temporary construction activities will generate airborne odors associated with the operation of construction vehicles (e.g., diesel exhaust). These emissions will occur during daytime hours only and will be isolated to the immediate vicinity of the demolition site and debris haul routes and will occur for as long as three months. As such, exhaust odors will be short-term and will not affect a substantial number of people. Impacts will be less than significant.
Land uses that typically generate objectionable odors include landfills, wastewater treatment plants, waste recycling facilities, food processing plants, chemical plants, composting facilities, refineries, dairies, fiber glass molding, and farming and livestock areas. By its nature, the proposed sewer main will transfer materials with the potential to create objectionable odors throughout the project alignment. However, because gravity sewers serving residential neighborhoods typically flow at a low velocity (about 2 feet per second) they will generally produce low levels of gasses and odors; but will not generally emit such odors throughout the community. In most situations, odors are generally isolated to pumping stations, at which control measures can be installed.
During construction asphalt odors may be noticeable from asphalt paving operations and there may be localized instances when the characteristic diesel exhaust odor is noticeable from construction equipment, but such transitory exposure is a brief nuisance and would not threaten regional air quality standards. Thus adverse impact in terms of objectionable odors during construction is considered less than significant.
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Mitigation Measures
Recommended Mitigation
To reduce air quality impacts associated with construction activities to below a level of significance, the following mitigation measures shall be implemented for dust control and to reduce fugitive dust emissions:
Air 1: To mitigate for potential adverse impacts resulting from construction activities, development projects must abide by the SCAQMD’s Rule 403 concerning Best Management Practices for construction sites in order to reduce emissions during the construction phase. The following measures shall be required when applicable:
• Sweep streets at the end of the day if visible soil material is carried onto adjacent paved public roads; • Wash off trucks and other equipment leaving the site; • Replace ground cover in disturbed areas immediately after construction; • Keep disturbed/loose soil moist at all times. • Suspend all grading activities when wind speeds exceed 25 miles per hour; • Enforce a 15 mile per hour speed limit on unpaved portions of the construction site.
Air 2: To reduce construction related particulate matter air quality impacts of City projects the following measures shall be required when applicable:
• The generation of dust shall be controlled as required by the AQMD; • Grading activities shall cease during periods of high winds (greater than 25 mph); • Trucks hauling soil, dirt or other emissive materials shall have their loads covered with a tarp or other protective cover as determined by the City Engineer; and, • The contractor shall prepare and maintain a traffic control plan, prepared, stamped, signed by either a licensed Traffic Engineer or a Civil Engineer. The preparation of the plan shall be in accordance with Chapter 5 of the latest edition of the Caltrans Traffic Manual and the State Standard Specifications. The plan shall be submitted for approval, by the engineer, at the preconstruction meeting. Work shall not commence without an approved traffic control plan.
Air 3: The following additional dust suppression measures in the SCAQMD CEQA Air Quality Handbook are included as part of the project’s mitigation:
• Re vegetate disturbed areas as quickly as possible.
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• Suspend all excavating and grading operations when wind speeds (as instantaneous gusts) exceed 25 mph. • Sweep all streets once per day if visible soil materials are carried to adjacent streets (recommend water sweepers with reclaimed water). • Install wheel washers where vehicles enter and exit unpaved roads onto paved roads or wash trucks and any equipment leaving the site. • Pave, water, or chemically stabilize all on-site roads as soon as feasible. • Minimize at all time the area disturbed by clearing, grading, earthmoving, or excavation operations.
Air 4: The Construction Contractor shall select the construction equipment used on site based on low-emission factors and high energy efficiency. The Construction Contractor shall ensure that construction grading plans include a statement that oil construction equipment will be tuned and maintained in accordance with the manufacturer’s specifications.
Air 5: The Construction Contractor shall utilize electric or alternative-fuel-powered equipment in lieu of gasoline-or-diesel-powered engines where feasible.
Air 6: The Construction Contractor shall ensure that construction plans include a statement that work crews will shut off equipment not in use. During smog season (May through October), the overall length of the construction period will be extended, thereby decreasing the size of the area prepared each day, to minimize vehicles and equipment operating at the same time.
Air 7: The Construction Contractor shall time the construction activities so as to not interfere with peak-hour traffic and minimize obstruction of through traffic lanes adjacent to the site; if necessary, a flag person shall be retained to maintain safety adjacent to existing roadways.
Air 8: The Construction Contractor shall support and encourage ridesharing and transit incentives for the construction crew.
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BIOLOGICAL RESOURCES
Setting
This Project alignment is located within the right-of-way of Agua Mansa Road between Riverside Avenue and Rancho Avenue. The majority of the sanitary sewer improvement will be performed using open trenching and trenchless methods, including auger boring. Habitat within the Agua Mansa right-of-way is classified as roadway pavement or maintained road shoulder. These habitat types do not provide habitat for any special-status plant or wildlife species and none are expected to occur.
The Agua Mansa Road is adjacent to Rialto Channel. Habitat surrounding Rialto Channel is classified as riparian. Riparian habitat provides important habitat for aquatic invertebrates, fish, amphibians, birds and mammals. The limits of the proposed project will not exceed the paved area within the right-of-way of Agua Mansa Road; therefore, the project will have no direct impacts to the riparian habitat adjacent to the site.
The project will be required to adhere to the best management practices of the City of Colton, which will preclude the project from indirectly impacting, through erosion or run-off, Rialto Channel or the surrounding riparian habitat.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
IV. BIOLOGICAL RESOURCES— Will the project:
a) Conflict with any local policies or Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive or special status species in local or regional plans, policies, regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service?
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b) Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the California Department of Fish and Game or U.S. Fish and Wildlife Service? c) Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means? d) Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites? e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? f) Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation plan?
Discussion a) As an improved City Street, the proposed project will not have a substantial adverse effect, either directly or through habitat modifications, on any sensitive species. b) The project is located adjacent to riparian habitat associated with the Rialto Channel, no riparian habitat or other sensitive habitat occurs within the limits
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of the project. Best management practices required during construction by the City of Colton will ensure that run-off and erosion will not indirectly impact the riparian habitat adjacent to the project site. No sensitive habitats, therefore, will be directly or indirectly impacted by the project and no further mitigation is required. c) This Project alignment is located within the right-of-way of Agua Mansa Road between Riverside Avenue and Rancho Avenue. The majority of the sanitary sewer improvement will be performed using open trenching and trenchless methods, including auger boring and pipe bursting. Habitat within the Agua Mansa right-of way is classified as roadway pavement or maintained road shoulder. No listed or proposed wetland areas occur on the property. d) The project site is not a migratory wildlife corridor. This Project alignment is located within the right-of-way of Agua Mansa Road between Riverside Avenue and Rancho Avenue. The majority of the sanitary sewer improvement will be performed using open trenching and trenchless methods, including auger boring and pipe bursting. e) The proposed project will not conflict with or result in any impacts to biological resources that are protected by any local preservation policies or ordinances. Therefore, no impact will occur. f) There are no sensitive biological resources located on the project site or in the vicinity. Due to the fact that the site has been previously graded and developed, there will be no opportunity to disturb any potentially sensitive plant or wildlife species. Therefore, the proposed project will not conflict with any adopted Habitat Conservation Plans or Natural Community Conservation Plans.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
V. CULTURAL RESOURCES. Would the project:
a) Cause a substantial adverse change in the significance of a historical resource as defined in § 15064.5?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
b) Cause a substantial adverse change in the significance of an archaeological resource pursuant to § 15064.5?
c) Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature?
d) Disturb any human remains, including those interred outside of formal cemeteries?
Discussion a) Section 15064.5 defines a historic resource as a resource that is included in a local register of historical resources, any object, building, structure, site, area, place, record, or manuscript that the lead agency determines as historically significant. The project site is located on the edge of the Agua Mansa Historic District. The installation of the sewer line will not cause a substantial adverse change in the significance of this historical resource. No potentially historic structures or other related resources occur on the site. Therefore, no impacts to historic resources will occur as a result of the proposed project. b) The project site is an existing roadway and the surrounding neighborhood is zoned for industrial and residential use. While the project would require some minimal grading and ground-disturbing activities during site preparation, the project site is not located in an area of the City that has been identified as being sensitive for archaeological resources. Therefore the potential for previous unknown subsurface archaeological resources to be encountered is below a level of significance and no mitigation is required.
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No known archaeological resources occur on the project site. Project plans include grading activities. On-site soils have been extensively disturbed by past activities at the site. No known archaeological resources, unique geologic features or human remains exist at the project site. Any surficial archaeological resources which may have existed at one time likely have been previously unearthed or disturbed. c) No known archaeological, cultural, or paleontological resources occur on- site. The project site and immediate vicinity are presently urbanized and covered with pavement and impervious surfaces. There are no known paleontological resources within the project site and immediate vicinity. There is no opportunity to disturb any known paleontological resource. d) The project site is surrounded by development, including industrial buildings, residential areas, the I-10 and I-215 Freeways. The project site and immediate vicinity are presently urbanized and covered with pavement and impervious surfaces. There are no known human remains or similar resources within the project site and immediate vicinity. There is no opportunity to disturb any known human remains.
Mitigation Measures
Recommended Mitigation
C-1 If potential historical/archaeological materials are uncovered during site preparation or other earth moving activities, the contractor shall be required to halt work in the immediate area of the find, and to retain a professional archaeologist to examine the materials to determine whether it is a historical resource as defined in Section 15064.5(a) of the CEQA Guidelines. If this determination is positive, the preferred method of mitigation shall be to leave the resource in place; however, if the archaeologist determines this is not feasible, the scientifically consequential information shall be fully recovered by the archaeologist. Work may continue outside of the area of the find; however, no further work shall occur in the immediate location of the find until all information recovery has been completed and a report concerning it is reviewed and approved by the Development Services Director.
C-2 If potential paleontological materials are uncovered during site preparation or other earth moving activities, the contractor shall be required to halt work in the immediate area of the find, and to retain a professional archaeologist to examine the materials to determine whether it is a unique archaeological resource as defined in Section 21083.2(g) of the California Public Resources Code. If this determination is positive, the preferred method of mitigation shall be to leave the resource in place; however, if the archaeologist determines this is not feasible, the scientifically consequential information shall be fully
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recovered by the archaeologist. Work may continue outside of the area of the find; however, no further work shall occur in the immediate location of the find until all information recovery has been completed and a report concerning it is reviewed and approved by the Development Services Director.
Less Than Significant Potentially With Less Than No Significant Mitigation Significant Impa Impact Incorporated Impact ct
VI. GEOLOGY AND SOILS. Would the project:
a) Expose people or structures to potential substantial adverse effects, including the risk of loss, injury or death involving: i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other substantial evidence of a known fault? Refer to Division of Mines and Geology Special Publication 42. ii) Strong seismic ground shaking? iii) Seismic-related ground failure, including liquefaction? iv) Landslides? b) Result in substantial soil erosion or the loss of topsoil?
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c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off- site landslide, lateral spreading, subsidence, liquefaction or collapse? d) Be located on expansive soil, as defined in Table 18 1 B of the Uniform Building Code (1994), creating substantial risks to life or property? e) Have soils incapable of adequately supporting the use of septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water?
Discussion a) a.i) The proposed project will not significantly expose people or structures to potential seismic hazards, including the risk of loss, injury or death involving an earthquake, strong ground shaking, liquefaction, or landslides.
According to the document entitled, “Special Studies Zones, San Bernardino South Quadrangle”, State of California, dated January 1977, the project is not within the Alquist-Priolo Earthquake Fault Study Zone associated with the San Jacinto Fault. Therefore, no setback zones or other mitigation methods for onsite fault rupture hazard are required or recommended.”
ii) The proposed project is located more than a mile west of the San Jacinto Fault. Compliance with recommended mitigation measures and applicable seismic design parameters ensures that the structural integrity of the project will not be compromised during a seismic event.
iii) To ensure that future development is not affected by liquefaction, the City shall prepare a geology/geotechnical study with submittal of the construction plan and compliance with recommended mitigation measures. The document shall include other geotechnical reports be prepared to evaluate geotechnical hazards and must comply with applicable building and standard design parameters relating to liquefaction that are required by the City of Colton Building Department Agua Mansa Sewer Force Main Project Page 34
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and City Engineer, Uniform Building Code, and Structural Engineers Association of California (SEAC). Compliance with applicable building and design parameters ensures that the structural integrity of future construction will not be compromised during a seismic event. Potential impacts are lessened when considering that the park project will not construct any habitable structures.
iv) According to the Draft EIR for the General Plan Update, the EIR exhibit 4.6-4 indicates that the project site is located within a zone of required investigation for earthquake-induced landslides Compliance with recommended mitigation measures and applicable seismic design parameters ensures that the structural integrity of the project will not be compromised during a seismic event. b) Project construction will have the potential to result in soil erosion and/or loss of top soil. Significant soil erosion and/or loss of top impacts, however, are not expected for the following reasons: the project site is relatively flat in topography and was previously graded and developed; project construction will not require extensive grading. Impacts will be less than significant. c) According to the Draft EIR for the General Plan Update, the EIR exhibit 4.6-4 indicates that the project site is located within a zone of required investigation for earthquake-induced landslides Compliance with recommended mitigation measures and applicable seismic design parameters ensures that the structural integrity of the project will not be compromised during a seismic event. The project site is neighbored by existing industrial development. Compliance with requirements of the Uniform Building Code and Structural Engineers Association of California (SEAC) further ensures that the structural integrity of future construction will not be compromised, resulting in less than significant impacts. Potential impacts are lessened when considering that the project will not construct any habitable structures. d) The area is not underlain by expansive soils based on those reasons explained in Response c). Soils within the project vicinity are stable and presently support existing development. Compliance with requirements of the City of Colton Building & Safety Division, Community Development Department, Uniform Building Code, and SEAC further ensures that the structural integrity of future construction will not be compromised. Thus, a less than significant impact will occur. e) The project site and vicinity are comprised of soils that have been capable of supporting the project’s wastewater disposal system. In addition, the project vicinity is presently serviced by several utility lines. Impacts will be less than significant.
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MITIGATION MEASURES
Prior to issuance of a construction permit, the City shall prepare a geology/geotechnical study with submittal of the construction plan. The document recommended that other geotechnical reports be prepared to evaluate geotechnical hazards. In compliance, the project may prepare a construction plan and further geology/geotechnical analyses. In addition, the proposed project must comply with those standard seismic design parameters that are required by the City of Colton Building Department and City Engineer, Uniform Building Code, and Structural Engineers Association of California (SEAC). Compliance with recommended mitigation measures and applicable seismic design parameters ensures that the structural integrity of the project will not be compromised during a seismic event.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
VII. HAZARDS AND HAZARDOUS MATERIALS. Would the project:
a) Create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
b) Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment?
c) Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one- quarter mile of an existing or proposed school?
d) Be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code section 65962.5 and, as a result, would it create a significant hazard to the public or the environment?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
e) For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard for people residing or working in the project area?
f) For a project within the vicinity of a private airstrip, would the project result in a safety hazard for people residing or working in the project area?
g) Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
h) Expose people or structures to a significant risk of loss, injury or death involving wildland fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands?
Discussion a) Construction of the proposed project would involve the transport and use of fuels, oil, and other fluids associated with construction equipment. Leaks or spills may occur during construction, potentially releasing hydrocarbons to the environment; however, compliance with applicable California Department of Toxic Substances Control (DTSC) regulations for the handling of hazardous materials and spill cleanup procedures would prevent potentially significant impacts. Operation of the sewer pipeline would not involve the routine transport, use, or disposal of hazardous materials. Therefore, impacts associated with the routine transport, use, or disposal of hazardous materials would be less than significant.
b) Construction of the proposed project would involve the transport and use of fuels, oil, and other fluids associated with construction equipment. Leaks or spills may occur during construction, potentially releasing hydrocarbons to the environment; however, compliance with applicable California Department of Toxic Substances Control regulations for the handling of hazardous materials and spill cleanup procedures would prevent potentially significant impacts. Operation of the sewer pipeline would not involve the routine transport, use, or disposal of hazardous materials. Therefore, impacts associated with the routine transport, use, or disposal of hazardous materials would be less than significant.
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CITY OF COLTON c) San Salvador Preschool is located near the corner of Rancho Avenue and the Agua Mansa Road, which is adjacent to the project site. A construction staging area for excavated and fill materials and equipment storage is anticipated to be located at the City of Colton Sewer Treatment Plan; however, in order to avoid potential impacts to students, faculty, and staff, construction activities in the vicinity of the school would be scheduled to occur during the summer when the school is not operating at full capacity and there are typically fewer people. Compliance with applicable DTSC regulations for the handling of hazardous materials and spill cleanup procedures would prevent potentially significant impacts associated with leaks and spills from construction equipment. Operation of the sewer pipeline would not emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste. Therefore, impacts associated with the release of hazardous materials in close proximity to a school would be less than significant. d) According to the document entitled, “RCRA Corrective Action GPRA Baseline”, State Department of Toxic Substances Control, 2000, the project site is not listed on any hazardous materials sites list as defined by Government Code Section 65962.5. e) There are multiple airports located in San Bernardino County including the San Bernardino International Airport, the Rialto Municipal Airport, and the Redlands Municipal Airport. Two are within 10 miles of the site: the San Bernardino International Airport, located approximately 7.2 miles east and the Rialto Municipal Airport located approximately 9.1 miles from the project site. The project site is not located within the boundaries of any airport land use plan. Furthermore, the residences will not be of a height that would conflict with any landing patterns. There is no opportunity to conflict with any airport land use plan. f) There are multiple airports located in San Bernardino County including the San Bernardino International Airport, the Rialto Municipal Airport, and the Redlands Municipal Airport. Two are within 10 miles of the site: the San Bernardino International Airport, located approximately 7.2 miles east and the Rialto Municipal Airport located approximately 8.7 miles from the project site. The project site is not located within any known airport land use plan. The project site is not located within any private airstrip plans. Furthermore, the residences will not be of a height that would conflict with any landing patterns. There is no opportunity to conflict with any private airstrip. g) According to the City of Colton General Plan Update, May 1987, the project site is not located within or near any of the City’s emergency response routes or evacuation plans. There is no opportunity to affect any of these plans or routes. h) According to the City of Colton General Plan Update, the project site is not
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located near a “Fire Hazard Area” and is not subject to potential wildfires. No impact will result.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
VIII. HYDROLOGY AND WATER QUALITY. Would the project:
a) Violate any water quality standards or waste discharge requirements? b) Substantially deplete groundwater supplies or interfere substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level (e.g., the production rate of pre- existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been granted)?
c) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, in a manner which would result in substantial erosion or siltation on- or off-site?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
d) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site?
e) Create or contribute runoff water which would exceed the capacity of existing or planned storm water drainage systems?
f) Otherwise substantially degrade water quality?
g) Place housing within a 100- year flood hazard area as mapped on a federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map?
h) Place within a 100-year flood hazard area structures which would impede or redirect flood flows?
i) Expose people or structures to a significant risk of loss, injury or death involving flooding, including flooding as a result of the failure of a levee or dam?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
j) Expose people or structures to inundation by seiche, tsunami, or mudflow?
Discussion a) Project construction and operations will not violate any water quality standards or waste discharge requirements. Future development is required to comply with the following conditions of approval, as required by the City’s Public Works Department:
• Comply with all requirements of the Municipal Activities Pollution Prevention Strategy, the National Pollution Discharge Elimination System (NPDES), and requirements of the California Regional Water Quality Board.
• Submit a Water Quality Management Plan (WQMP), which specifies the Best Management Practices (BMPs) that will be used on-site to reduce the pollutants into the storm drain system.
• Ensure that BMPs are followed, per NPDES requirements to reduce storm water runoff during construction and thereafter.
• Temporary erosion control measures will be implemented immediately following rough grading to prevent deposition of debris into downstream properties and drainage facilities.
• Create and implement a Storm Water Pollution Plan (SWPPP), per State requirements (one acre or more) to manage storm water and non-storm water discharges from the site at all times. The SWPPP will describe all BMPs to be implemented year round. Specific BMP implementation may be dependent upon wet or dry season operations.
• Submit a letter to the City Engineer certifying that the owner is responsible for complying with the NPDES Ordinance, including any
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necessary monitoring during and after construction.
• All storm water originating from the development shall drain to the street. No contaminated water shall discharge onto sidewalks, gutters, storm drains, parkways, or driveways. b) The proposed project will not violate any water quality standards or requirements. The project is required to comply with those measures previously described above in response “a”. Impacts will be less than significant. c) The project will comply with the provisions previously described in response “a”, which ensures that runoff water will not be polluted prior to discharge into the public system. Therefore, impacts will be less than significant. d) The project is within an existing paved road. The public system has sufficient capacity to accommodate project flows. The project is not of a land use or scale that will adversely affect any receiving waters. Impacts are less than significant. e) The proposed project will not violate any water quality standards or waste discharge requirements. The project is required to comply with those requirements described in the aforementioned Response a). In addition, the project will also provide worker education, landscape management, catch basins, and street sweeping as appropriate. Construction vehicle maintenance will not occur at the site. The addition of concrete and landscaping for onsite surfaces would reduce the amount of loose sediments that could be washed off-site. Significant impacts will not result.
i) The project will not discharge directly to any water body listed on the Clean Water Act 303(d) list, as discharges from the site will be to the City’s storm drains.
ii) The project will not discharge directly to any water body listed on the Clean Water Act 303(d) list, as discharges from the site will be to the City’s storm drains. Neither construction or post-construction activities will result in the discharge of any impairing pollutants.
iii) The project will comply with the requirements of the City’s Municipal Stormwater Permit, including preparation of a Water Quality Management Plan (WQMP). A WQMP that is consistent with the Model WQMP adopted by the RWQCB, and is subject to the performance standards set out in the Permit, ensures protection of water quality from municipal stormwater runoff. These pollution control measures are sufficient to prevent any discharge from causing or contributing to water quality impairment.
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CITY OF COLTON f) The project site is not of a large enough scale that it will substantially deplete groundwater supplies or interfere with groundwater recharge. Impacts will be less than significant. g) The proposed project will not alter onsite drainage patterns. The public system has sufficient capacity to accommodate project flows. In addition, the project will not significantly alter onsite drainage patterns. Significant erosion impacts will not result. The project must comply with requirements of the City Engineering Division, which requires that construction plans be prepared and approved, prior to construction. h) Project Substantial portions of the proposed sewer alignment are located within a 100-year flood hazard area with flood zone designation A, X and AE. However, no structures are proposed as part of the project, which could impede or redirect flood flows. Since no aboveground buildings or structures are proposed as part of the proposed sewer replacement project, no impediment or redirection of existing flows would occur with implementation of the project. No impact to flood flows is reasonably expected. i) The proposed project will not alter onsite drainage patterns. The project will not alter any stream or river. The project is required to comply with conditions of approval established by the City Engineering Division, which requires that grading plans be prepared and approved, prior to construction. j) The proposed project is not of a land use or intensity that will affect or create any onsite or offsite drainage and/or flooding impacts or alter on-site drainage patterns. The project site will not contribute runoff that will exceed the existing drainage system. All project runoff will be conveyed into the existing drainage system in accordance with City requirements. Impacts will be less than significant.
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Less Than Significant With Potentially Mitigation Less Than Significant Incorporate Significan No Impact d t Impact Impact
IX. LAND USE AND PLANNING. Would the project:
a) Physically divide an established community?
b) Conflict with any applicable land use plan, policy, or regulation of an agency with jurisdiction over the project (including, but not limited to the general plan, specific plan, local coastal program, or zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect?
c) Conflict with any applicable habitat conservation plan or natural community conservation plan?
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Discussion
a) The proposed project will not divide an established community. Lot boundary lines and zoning will remain the same. The project site is surrounded by existing development including industrial buildings and uses, the I-10 and I-215 Freeways, and railroad tracks. The proposed project is compatible with surrounding uses. It is concluded that the project is not of a land use or intensity that will significantly conflict with or divide the community or the City of Colton. The proposed project will not require any additional roadways or other significant features. No impact will occur. b) The proposed project is consistent with the General Plan and Zoning designations. Project implementation requires approval of the project’s design. Approval of the proposed Design ensures that the project will not conflict with any land use policy, plan, or program. The proposed project is anticipated to have no such impact.
c) The proposed project is not located within an area that is monitored or regulated by a habitat conservation plan or natural community conservation plan. The project site was previously cleared, graded and developed; therefore, there are no biological habitats or resources on the project site. No impacts will occur.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
X. MINERAL RESOURCES. Would the project:
a) Result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
b) Result in the loss of availability of a locally- important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan?
Discussion a) According to the Draft EIR for the General Plan Update, the project site is located within Mineral Resource Zones MRZ-2 (i.e., areas where geologic date indicates that significant PCC-grade aggregate resources are present) and MRZ-3 (i.e., areas containing known or inferred mineral occurrences of undetermined mineral resource significance).
The project site is currently a developed roadway. There are no mining operations within the vicinity of the project site and the existing roadway would preclude mining from occurring. Industrial and residential land uses are defined as incompatible to mining operations. b) The City’s General plan does not identify any locally important mineral resources, other than those associated with the limestone deposits part of Slover Mountain.
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
XI. NOISE. Would the project result in:
a) Exposure of persons to or generation of noise levels in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies?
b) Exposure of persons to or generation of excessive groundborne vibration or groundborne noise levels?
c) A substantial permanent increase in ambient noise levels in the project vicinity above levels existing without the project?
d) A substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
e) For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels?
f) For a project within the vicinity of a private airstrip, would the project expose people residing or working in the project area to excessive noise levels?
Discussion
a) Given that the project site is an existing roadway, the proposed project will generate new noise resulting from construction traffic and operations.
The City of Colton sets forth outdoor and indoor noise limits for various land use districts within the City to protect properties in all residential zones and the health and safety of persons from environmental nuisances and hazards and to provide a pleasing environment in keeping with the nature of the residential character.
The maximum sound level radiated by any use of facility, when measured at
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the boundary line of the property on which the sound is generated, shall not be obnoxious by reason of its intensity, pitch or dynamic characteristics as determined by the City, and shall not exceed 65 dBA.
Noise impacts associated with installation of the sewer line would be associated with construction activities. In the Vicinity of Agua Mansa Road, Rancho Avenue, nearby homes and commercial uses would potentially be subject to temporary construction noise in excess of established City standards. Construction noise associated with installation and removal of the sewer line would be tied to the use of pneumatic and boring equipment, heavy construction vehicles, transport of materials to and from the site, and loading/unloading of materials from trucks. Considering the proposed alignment along Agua Mansa Road, short term construction noise impacts would also be expected in the residential area east of Rancho Avenue.
Construction noise impacts would occur on a short term and temporary basis and may impact nearby sensitive land uses. Temporary construction noise impacts would vary in noise level according to the type of construction equipment and the distance between the source and the receiver. Mitigation would be necessary to reduce impacts considered significant under CEQA guidelines.
b) Construction of the proposed sewer main would result in temporary noise impacts associated with the use of jack and pneumatic hammers, heravy construction equipment, hauling of materials to and from th site, and loading/ unloading oof materials. Although construction noise impacts may temporarily impact surrounding land uses, permanent excessive ggroundbone vibration and groundbone noise levels would not be created by the proposed project. Adherence to City noise standards and regulations would reduce noise impacts to less than significant.
c) Noise impacts will not be generated and operation of the proposed project will be required to comply with standards contained in the City’s Noise Ordinance, it is concluded that the project will not expose any person to excessive noise levels. As a result, implementation of the proposed project will not permanently increase ambient noise levels in the area. No impacts will occur.
d) Grading and construction activities will generate some noise. However, impacts are not expected to be significant for the following reasons. The grading activities and construction of the project will generate only temporary noise disturbances. Therefore, any incremental increase in noise levels resulting with future development will be mixed with existing levels already generated in the vicinity. Any incremental noise disturbance generated directly by future development will not likely be perceived by the public. All construction activities and hours of operation are required to
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comply with standards and requirements contained in the City’s Noise Ordinance which further alleviate any potential noise impact as outlined in Mitigation Measures.
e) The project site is not located within any airport land use plan area. There is no opportunity to expose any persons to excessive airport noise.
f) There are no private airstrip facilities located within the vicinity of the proposed project site. Therefore, the project will not expose people residing or working in the area to excessive noise levels. No impacts will occur.
MITIGATION MEASURES
Construction Noise
Construction will be limited to the hours of 7:00 a.m. to 7:00 p.m., Monday through Saturday. No construction activities are permitted outside of these hours or on Sundays and federal holidays. The following measures will be implemented to reduce potential construction noise impacts on nearby sensitive receptors.
1. During all site excavation and grading, the project contractors shall equip all construction equipment, fixed or mobile, with properly operating and maintained mufflers consistent with manufacturers’ standards.
2. The project contractor shall place all stationary construction equipment so that emitted noise is directed away from sensitive receptors nearest the project site.
3. The construction contractor shall locate equipment staging in areas that will create the greatest distance between construction-related noise sources and noise-sensitive receptors nearest the project site during all project construction.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
XII. POPULATION AND HOUSING. Would the project:
a) Induce substantial population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through extension of road or other infrastructure)?
b) Displace substantial numbers of existing housing, necessitating the construction of replacement housing elsewhere?
c) Displace substantial numbers of people, necessitating the construction of replacement housing elsewhere?
Discussion a) The proposed sewer project would not directly induce population growth, as no homes or business are proposed as part of the project. Construction activities would be temporary and short term and not lead to a demand for permanent housing, goods, or services in the area.
The project would build a new pipeline to accommodate greater sewer flows. Thus, the project could accommodate future growth in the project area. Although the project would accommodate future growth in the area, it would only be considered a preliminary step towards growth since future
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development in the area is subject to future City decisions, land use regulations and ordinances established to regulate growth; goals and objectives of the Agua Mansa Specific Plan, and market conditions. b) Housing units are not located onsite. There is no opportunity to displace any housing. c) Housing units are not located onsite. There is no opportunity to displace any housing or people.
Less Than Significant With Potentially Mitigation Less Than Significant Incorporat Significant No Impact ed Impact Impact
XIII. PUBLIC SERVICES. Would the project:
a) Result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives for any of the public services:
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Less Than Significant With Potentially Mitigation Less Than Significant Incorporat Significant No Impact ed Impact Impact
Fire protection?
Police protection?
Schools?
Parks?
Other public facilities?
Discussion a) The proposed project will not result in the need for more public services.
Fire Protection
The City of Colton Fire Department provides fire protection services and emergency response for all private, institutional and public facilities within the City. Three Colton fire stations are located in vicinity to the proposed project alignment. The closest station to the proposed project site if fire station #213 located at 1100 South La Cadena Drive, approximately 0.75 miles from the propose project area. The next xcoset stations, fire stations #211 and fire station # 212, are located at 303 East E Street and 1511 North Rancho Avenue, repectively. Both of these stations are located within 1.25 miles of the proposed project.
Police Protection
Police protection services are presently provided by the City of Colton police Department. Police headquarters are located at 650 N. La Cadena Drive in the City of Colton, approximately 2.5 miles northeast of the proposed project area.
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enforcement service. During construction, traffic flow near the project area may slow police response. However, as mentioned, no closures or detours are proposed during construction and all parcels located along the project area would remain accessible. As standard practice, other service agencies would be informed of the infrastructure improvements construction schedule. This would allow emergency vehicles to plan alternate routes as necessary. Impacts on police protection services would be less than significant.
Schools
The project area is within the service boundaries of the Colton joint Unified School District (CJUSD). The CJUSD in San Bernardino County, California serves the communities of Colton, Bloomington, and Grand Terrace, as well as portions of Fontana, Loma Linda and unincorporated Riverside County.
Improving the overburdened sewer infrastructure would not generate demand for school services. The project will not increase population and therefore, will not increase the student enrollment or burden the local school district.
Parks
The City of Colton owns and maintains 4 Public Parks and additional open space area. Additional park and recreation facilities are provided by the state and other county agencies.
The proposed sewer line project would not generate a demand for parks and recreational services. The project will not increase the service ratios for park facilities and public facilities in the City and therefore, local parks will be consistent with the City’s Park Master Plan.
The project will not increase population and therefore, will not increase student enrollment or burden the local school district.
Other Public Facilities
Library services in the City of Colton are currently provided at 2 branch locations. The City of Colton Main Library is located at 656 9th Street, less than 2 miles from the proposed project area.
The proposed project would not affect library facilities or impact medical service and facilities. The Installation of the sewer line would not require or create demand for community centers of these services and facilities.
The project will not increase population in the City and therefore, other
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public facilities such as libraries will not be significantly impacted.
Less Than Potentiall Significant y With Significan Mitigation Less Than t Incorporate Significan No Impact d t Impact Impact
XIV. RECREATION. Would the project:
a) Increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated?
b) Does the project include recreational facilities or require the construction or expansion of recreational facilities which have an adverse physical effect on the environment?
Discussion a) The City of Colton owns and maintains 4 Public Parks and additional open space area. Additional park and recreation facilities are provided by the state and other county agencies and through local joint –use agreements. Joint-use agreements are established with non-city owned parks so that public use is allowed use of the site in exchange for maintenance service performed by the City. The City of Colton’s park system categorizes parks as local, regional/ reserve parks, based on size, location, and amenities provided.
The project will not increase population in the City and therefore, local parks will be consistent with the City’s Park Master Plan. No impact will occur. b) The project will not increase population in the City and therefore, local parks
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will be consistent with the City’s Park Master Plan. The project proposes to install a sewer pipeline. No recreational facilities are proposed for construction or expansion as part of the project. No impact would occur.
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
XV. TRANSPORTATION / TRAFFIC Would the project:
a) Cause an increase in traffic which is substantial in relation to the existing traffic load and capacity of the street system (i.e., result in a substantial increase in either the number of vehicle trips, the volume to capacity ratio on roads, or congestion at intersections)?
b) Exceed, either individually or cumulatively, a level of service standard established by the county congestion management agency for designated roads or highways?
c) Result in a change in air traffic patterns, including either an increase in traffic levels or a change in location that results in substantial safety risks?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
d) Substantially increase hazards due to a design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment)?
e) Result in inadequate emergency access?
f) Result in inadequate parking capacity?
g) Conflict with adopted policies, plans, or programs supporting alternative transportation (e.g., bus turnouts, bicycle racks)?
Discussion a) The proposed sewer improvement would install a new sewer line under an existing City Street. No long term increase in either the number of vehicle trips, volume, or congestion at intersections would occur with implementation of the proposed project. Short-term impacts to circulation may occur during construction within the City right-of-way on Riverside Avenue, Agua Mansa Road, Miguel Bustamante Road and Rancho Avenue. The proposed project shall not have street closures and utilize all street rights of way to minimize impacts. b) According to the City of Colton General Plan, Agua Mansa Road is a designated major arterial within the General Plan Circulation Element. The proposed project would not create additional vehicle trips and would only create short-term impacts due to delays and detours without substantially altering long-term LOS standards on Agua Mansa Road, Rancho Avenue,
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Miguel Bustamante and Riverside Avenue. No adverse impacts are expected. c) There are multiple airports located in San Bernardino County including the San Bernardino International Airport, Rialto Municipal Airport and the Redlands Municipal Airport. Two are within 10 miles of the site; the San Bernardino Municipal Airport, located approximately 7.2 miles ease and the Rialto Municipal Airport located approximately 9.1 miles north from the project site. The proposed project, however, will not conflict with any airport land use plan. The proposed project is not of a height that would conflict with any flight or landing patterns. No impact will occur. d) The proposed project does not include any changes to existing roadway network or design features. The project’s entry, access will be designed in accordance with City requirements and standards. The City’s Engineering Department has reviewed the project’s circulation and roadway improvement plans and has found these plans acceptable. It should be noted that project roadways will be privately maintained. Hazardous traffic conditions will not result with the project. e) It is likely that local roadways would remain open to thru traffic during the construction period. While traffic slowing may occur during construction, access to parcels along the roadway would be available at all times; thus, emergency response and evacuation would be maintained. Implementation of Mitigation Measure Traffic 1 would also ensure that emergency access is maintained during construction activities. Notification of the Fire and Police Departments of the roadway construction schedule would allow emergency vehicles to use alternate routes for emergency response. After construction, infrastructure improvements would not inhibit emergency vehicle access to properties in the surrounding area. Impacts would therefore be short-term and less than significant with mitigation. f) The project will provide parking spaces in accordance with City requirements. Sufficient parking will be provided in accordance with City requirements. Adequate parking will be provided.
The proposed project may temporarily interfere with parking at the City of Colton Sewer Treatment Plant Facility, as well as on public streets where the new sewer is proposed. No long-term impact on parking capacity is expected to occur in the city or on the treatment plant. The project proposes to improve the City’s sewer infrastructure; no net loss or addition of parking spaces is proposed. To ensure that short-term impacts to parking capacity remain less than significant at the treatment plant, coordination shall occur prior to the commencement of construction on campus in accordance with Mitigation Measure Traffic 1.
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CITY OF COLTON g) The project will be designed according to requirements and standards of the Fire and Engineering Departments. The project will not conflict with any City alternative transportation policies, plans or programs.
Mitigation
To reduce short-term but significant traffic impacts from construction within City ROW, a Construction Impact Management Plan shall be prepared and subject to review and approval by the Department of Public Works, Police Department and Fire Department to ensure that the Plan has been designed in accordance with this mitigation measure. This review shall occur prior to commencement of any construction staging for the project.
Traffic 1:
The City shall prepare a Construction Impact Management Plan which, at a minimum, shall be designed to:
• Prevent material traffic impacts on the surrounding roadway network; • Prevent substantial truck traffic through residential neighborhoods; • Detour public bus routes operating in the construction area; • Notify the Fire and Police Departments of the roadway construction schedule to allow emergency vehicles to use alternate routes for emergency response; • Ensure the necessary Encroachment Permits are received; and • Coordinate construction activities with the schools to minimize construction impacts during hours when class is in session. Scheduling of trenching and all other construction operations during non-school hours may be necessary.
The following ongoing requirements throughout construction duration shall also be addressed:
• Information regarding the projects construction activities that may disrupt normal pedestrian and traffic flow and the measures to address these disruptions; • Construction work hours; • Truck traffic; • Appropriate locations for materials and equipment storage to minimize visibility to the public; and • Provisions of off-street parking for construction workers, which may include the use of a remote location with shuttle transport to the site, if determined necessary by the City of Colton.
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UTILITIES AND SERVICE SYSTEMS.
Existing Setting: The setting information provided below is based on information contained in the City’s General Plan and the Water and Wastewater Business Plan.
Wastewater
The City of Colton has 125 miles of collection system pipe ranging from 6 inch to 36 inch. Currently, the Wastewater Plant has a capacity of accommodating approximately 10 million gallons per day and has an existing flow of 5.2 million gallons per day and runs 24 hours a day, 365 days a year and serves 52,000 residents. The plant also serves residents in the City of Grand Terrace. The collection systems have eight lift stations. The Plant produces about 2,000 tons of dry bio solids each year.
The Wastewater Treatment Plant performs ongoing extraction of bio-solids from wastewater during treatment. These solids must be disposed of in an environmentally safe and acceptable manner, consistent with EPA regulations.
The Wastewater Treatment Plant removes approximately 7,000 tons of sludge per year. Once dry, the sludge is hauled to an acceptable and environmentally safe disposal site. The Plant has seven sewage lift stations are maintained by the Department.
The Wastewater Operation Division is responsible for providing the removal and treatment of wastewater from homes and businesses within the service area, collecting the wastewater from properties, maintaining the pipes to minimize service interruptions and treating the wastewater to state and federal water quality standards. Each of these steps includes a variety of operation and maintenance activities. Services in support of these core activities include testing wastewater samples to ensure a high-quality effluent, operating the combined sewer overflow and bio-solids treatment facilities, educating the public on pollution prevention activities and, developing facility master plans to set the stage for the future.
Water
Colton's water supply is comprised entirely of groundwater extracted from the San Bernardino Basin Area (Bunker Hill Basin portion), the Rialto-Colton Basin, and the Riverside Basin (Riverside North Basin portion). Colton currently does not import water in order to meet the demands of its service area.
Colton categorizes customers as residential, commercial, industrial, and “other”
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CITY OF COLTON uses. On average, 60 % of water deliveries are for residential use and 35 % are for commercial use, while the remaining 5 % is split between industrial (3 %) and other uses (2 %). Listed below are some of the key information and infrastructure that the City of Colton’s Water Utility maintains:
• 9,900 acre-feet of water produced each year
• 52,000 residents served
• 4 pressures zones
• 120 Miles of pipeline ranging from 2” to 30”
• 13 production wells
• 9 reservoirs with a 21.78 million gallon combined capacity
• 5 booster stations with 11 boosters
• 2 perchlorate treatment systems
• 3 groundwater basins
• 1,809 system valves ranging from 2” to 30”
• 1,594 fire hydrants
Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
XVI. UTILITIES AND SERVICE SYSTEMS. Would the project:
a) Exceed wastewater treatment requirements of the applicable Regional Water Quality Control Board?
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
b) Require or result in the construction of new water or wastewater treatment facilities or expansion of existing facilities, the construction of which could cause significant environmental effects?
c) Require or result in the construction of new storm water drainage facilities or expansion of existing facilities, the construction of which could cause significant environmental effects?
d) Have sufficient water supplies available to serve the project from existing entitlements and resources, or are new or expanded entitlements needed? In making this determination, the City shall consider whether the project is subject to the water supply assessment requirements of Water Code Section 10910, et. seq. (SB 610), and the requirements of Government Code Section 664737 (SB 221).
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Less Than Significant Potentially With Less Than Significant Mitigation Significant No Impact Incorporated Impact Impact
e) Result in a determination by the wastewater treatment provider which serves or may serve the project that it has adequate capacity to serve the project's projected demand in addition to the provider's existing commitments?
f) Be served by a landfill with sufficient permitted capacity to accommodate the project's solid waste disposal needs?
g) Comply with federal, state, and local statutes and regulations related to solid waste?
Discussion a-b,d) Project implementation will not violate any water quality standards or waste discharge requirements. The proposed project is an upgrade to the City’s sewer collection system and will facilitate the delivery of waste water to City properties. The proposed project will install a sanitary sewer collection system within the City, and does not propose the creation of expansion of sewer treatment facilities, and thus will not exceed any wastewater treatment requirements of the Regional Water Quality Control Board.
No long-term storm water drainage facility improvements are included in the proposed scope of work for the ser projects evaluated herein, but during construction, stormwater best management practices shall be utilized per City standard specifications.
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No water supply is necessary for the project. The project shall comply with Federal, State and Local statutes and regulations related to solid waste and disposal. Therefore, there will be no impact.
Water Services are presently provided to the project site and overall vicinity. The Wastewater treatment plant is sufficient to handle the additional flows from the project. The proposed project is not of a land use or intensity that will increase the need for expansion of existing or additional facilities. c) Drainage facilities are presently available onsite and other areas within the vicinity. The project is not of a land use or intensity that will significantly increase the need for expansion of existing or additional facilities. The existing drainage system will accommodate the proposed project.
The proposed sewer line replacement would not require construction of new storm water discharge facilities or expansion of existing facilities, No drainage facilities would be constructed; therefore, no impact is expected. e) The Wastewater treatment plant is sufficient to handle the additional flows from the project. The Wastewater Plant has a capacity to accommodate approximately 10 million gallons per day and has an existing flow of 5.2 million gallons per day. The proposed project is not of a land use or intensity that will significantly increase the need for expansion of existing or additional facilities. f) Construction activities are not expected to generate substantial amounts of solid waste that will need to be disposed at a landfill. In the event that surplus soil and demolition materials must be disposed of, solid waste materials from demolition will b transferred to an appropriate solid waste handling facility. The project could minimally and temporarily increase solid waste production over the current levels, and there are facilities available to accept solid waste materials generated by the construction of the project. Impacts from solid waste generation will be less than significant. g) The project is not of a land use or intensity that will significantly increase generation of solid waste. Solid wastes generated by the proposed project would be minimal since no building structures would be demolished. Any existing sewer infrastructure or paving material removed as part of the project could be recycled if feasible. Any hazardous wastes would be disposed of in accordance with existing regulations. Implementation of the sewer infrastructure improvements would not conflict with federal, state, or city solid waste regulations. Long-term use of the trunk sewer pipeline would not generate solid wastes; therefore, impacts would be less than significant.
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Less Than Significant Potentially With Less Than No Significant Mitigation Significan Impac Impact Incorporated t Impact t
XVII. MANDATORY FINDINGS OF SIGNIFICANCE
a) Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, substantially reduce the number or restrict the range of a rare or endangered plant or animal or eliminate important examples of the major periods of California history or prehistory?
b) Does the project have the potential to achieve short-term environmental goals to the disadvantage of long-term environmental goals?
c) Does the project have impacts that are individually limited, but cumulatively considerable? ("Cumulatively considerable" means that the incremental effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current project, and the effects of probable future projects.)
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Less Than Significant Potentially With Less Than No Significant Mitigation Significan Impac Impact Incorporated t Impact t
d) Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly?
Discussion a) The project will not have the potential to degrade the quality of the environment, substantially reduce natural plant and wildlife populations, threaten to significantly reduce or eliminate rare or endangered plant and/or animal species, and/or eliminate any historic or prehistoric resource. The project does not have any significant natural plant and wildlife populations. The project will be self-contained to its site and will not endanger any historic or prehistoric resource. No impact will occur. b) The proposed project will not result in any cumulatively considerable impacts limited, but cumulatively considerable resulting from grading operation. There will be no change in land use designations as part of the project. The proposed project will not have short-term environmental goals to the disadvantage of long-term environmental goals. The potential impact will be less than significant. c) The proposed project will not result in a health hazard and there will be no adverse environmental impacts on human beings, either directly or indirectly. The small quantity of regulated materials potentially resulting from construction activities (e.g. used oil, solvents, etc.) will be handled and disposed of in a manner that will comply with all regulatory requirements and potential health risks will be minimal. The proposed project will not have cumulative impacts that could be considerable in connection with the effects of past, current, and future projects. The potential impact will be less than significant. d) The proposed project has no potential to achieve short-term environmental goals to the disadvantage of long-term environmental goals. The action is not expected to result in a significant physical change or change in land use activities, change in utility or service providers, or major policy changes that will be detrimental to long-term environmental goals. The potential impact will be less than significant. Agua Mansa Sewer Force Main Project Page 68
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