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DRAFT Environmental Impact Report Orange County Water District Prado Basin Sediment Management Demonstration Project State Clearinghouse No. 2013111071

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DRAFT Environmental Impact Report Orange County Water District Prado Basin Sediment Management Demonstration Project State Clearinghouse No. 2013111071 DRAFT Environmental Impact Report Orange County Water District Prado Basin Sediment Management Demonstration Project State Clearinghouse No. 2013111071 Orange County Water District 18700 Ward Street Fountain Valley, CA 92708 Contact: Daniel Bott March 2014 Table of Contents Section Page SECTION 1 INTRODUCTION ........................................................................ 1-1 1.1 Purpose and Authority .............................................................................. 1-1 1.2 Public Consultation .................................................................................. 1-1 1.3 Effects Determined Not Significant ........................................................... 1-4 1.4 Effects Determined To Be Potentially Significant ..................................... 1-4 1.5 Review of the Draft EIR ............................................................................ 1-5 SECTION 2 PROJECT DESCRIPTION ......................................................... 2-1 2.1 Background .............................................................................................. 2-1 2.2 Project Area Setting ................................................................................. 2-1 2.3 Project Activities ....................................................................................... 2-2 2.4 Project Monitoring Programs .................................................................... 2-9 2.5 Construction Operations ......................................................................... 2-12 2.6 CEQA Project Objectives ....................................................................... 2-17 2.7 Permits and Approvals ........................................................................... 2-18 SECTION 3 ENVIRONMENTAL ANALYSIS ................................................. 3-1 3.1 AESTHETICS RESOURCES ................................................................... 3-2 3.1.1 Regulatory Framework ............................................................... 3-2 3.1.2 Existing Environmental Setting ................................................... 3-2 3.1.3 Thresholds of Significance ......................................................... 3-4 3.1.4 Project Impacts........................................................................... 3-4 3.2 AIR QUALITY ........................................................................................... 3-7 3.2.1 Regulatory Framework ............................................................... 3-7 3.2.2 Existing Environmental Setting ................................................. 3-10 3.2.3 Threshold of Significance ......................................................... 3-13 3.2.4 Project Impacts......................................................................... 3-13 3.3 BIOLOGICAL RESOURCES .................................................................. 3-29 3.3.1 Regulatory Framework ............................................................. 3-29 3.3.2 Existing Environmental Setting ................................................. 3-33 3.3.3 Thresholds of Significance ....................................................... 3-59 3.3.4 Project Impacts......................................................................... 3-60 3.3.5 Unavoidable Significant Impacts to Listed Sensitive Species . 3-102 3.3.6 Orange County Water District Prior Mitigation Commitments in Prado Basin ............................................................................ 3-102 3.3.7 Proposed Mitigation Concept ................................................. 3-104 3.4 CULTURAL RESOURCES ................................................................... 3-110 3.4.1 Regulatory Framework ........................................................... 3-110 3.4.2 Existing Environmental Setting ............................................... 3-111 3.4.3 Threshold of Significance ....................................................... 3-122 3.4.4 Project Impacts....................................................................... 3-122 3.5 GEOLOGY ........................................................................................... 3-126 3.5.1 Regulatory Framework ........................................................... 3-126 3.5.2 Existing Environmental Setting ............................................... 3-127 3.5.3 Threshold of Significance ....................................................... 3-130 3.5.4 Project Impacts....................................................................... 3-130 3.6 GREENHOUSE GAS EMISSIONS ...................................................... 3-136 3.6.1 Regulatory Framework ........................................................... 3-136 3.6.2 Existing Environmental Setting ............................................... 3-137 Orange County Water District Prado Basin Sediment Management Project Draft Environmental Impact Report i Table of Contents 3.6.3 Threshold of Significance ....................................................... 3-139 3.6.4 Project Impacts....................................................................... 3-139 3.7 HAZARDS/HAZARDOUS MATERIALS................................................ 3-142 3.7.1 Regulatory Framework ........................................................... 3-142 3.7.2 Existing Environmental Setting ............................................... 3-144 3.7.3 Thresholds of Significance ..................................................... 3-145 3.7.4 Project Impacts....................................................................... 3-145 3.8 HYDROLOGY/WATER QUALITY ........................................................ 3-148 3.8.1 Regulatory Framework ........................................................... 3-148 3.8.2 Existing Environmental Setting ............................................... 3-152 3.8.3 Significance Criteria ............................................................... 3-172 3.8.4 Project Impacts....................................................................... 3-173 3.9 LAND USE/RELEVANT PLANNING PROGRAMS............................... 3-185 3.9.1 Regulatory Framework ........................................................... 3-185 3.9.2 Existing Environmental Setting ............................................... 3-186 3.9.3 Thresholds of Significance ..................................................... 3-187 3.9.4 Project Impacts....................................................................... 3-187 3.10 NOISE 3-192 3.10.1 Regulatory Framework ........................................................... 3-192 3.10.2 Existing Environmental Setting ............................................... 3-195 3.10.3 Thresholds of Significance ..................................................... 3-198 3.10.4 Project Impacts....................................................................... 3-198 3.11 TRANSPORTATION ............................................................................ 3-205 3.11.1 Regulatory Framework ........................................................... 3-205 3.11.2 Existing Environmental Setting ............................................... 3-206 3.11.3 Thresholds of Significance ..................................................... 3-207 3.11.4 Project Impacts....................................................................... 3-207 SECTION 4 CUMULATIVE IMPACTS ........................................................... 4-1 4.1 CEQA Analysis Requirements.................................................................. 4-1 4.2 Cumulative Analysis Methodology ............................................................ 4-1 4.3 Cumulative Impact Evaluation .................................................................. 4-7 SECTION 5 OTHER CEQA SECTIONS ........................................................ 5-1 5.1 Growth Inducing Impacts .......................................................................... 5-1 5.2 Significant Irreversible Changes ............................................................... 5-2 5.3 Summary of Project Impacts .................................................................... 5-3 SECTION 6 ALTERNATIVES TO THE PROPOSED PROJECT ................... 6-1 6.1 Purpose and Scope .................................................................................. 6-1 6.2 Project Objectives .................................................................................... 6-2 6.3 Planning Criteria ....................................................................................... 6-2 6.4 Alternatives Eliminated From Further Analysis ......................................... 6-3 6.5 Project Alternatives Considered and Evaluated ....................................... 6-5 6.5.1 Alternative 1-No Project Alternative ............................................ 6-5 6.5.2 Alternative 2- Alternative Sediment Storage Site D .................... 6-8 6.5.3 Alternative 3 - Alternative Sediment Removal Method.............. 6-13 6.6 Environmentally Superior Alternative ..................................................... 6-19 SECTION 7 LIST OF PREPARES AND REVIEWERS .................................. 7-1 SECTION 8 REFERENCES ........................................................................... 8-1 Orange County Water District Prado Basin Sediment Management Project Draft Environmental Impact Report ii Table of Contents Table Page Table 1: IS/NOP Comment Letters ...............................................................................1-2
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