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APPENDIX C Biological Resources Technical Report

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APPENDIX C Biological Resources Technical Report APPENDIX C Biological Resources Technical Report DRAFT Biological Technical Report for the Coastal Treatment Plant Export Sludge Force Main Project Prepared for: South Orange County Wastewater Authority 34156 Del Obispo Dana Point, California 92629 Contact: Brian Peck Prepared by: 605 Third Street Encinitas, California 92024 Contact: Shawn Shamlou OCTOBER 2012 Draft Biological Technical Report for the Coastal Treatment Plant Export Sludge Force Main Project TABLE OF CONTENTS Section Page No. SUMMARY OF FINDINGS ...................................................................................................... IV 1.0 SUMMARY OF FINDINGS .............................................................................................1 2.0 INTRODUCTION..............................................................................................................5 2.1 Project Description.................................................................................................. 5 3.0 PROJECT SETTING ......................................................................................................11 3.1 Project Location .................................................................................................... 11 3.2 Climate .................................................................................................................. 11 3.3 Soils....................................................................................................................... 11 3.4 Terrain ................................................................................................................... 11 3.5 Land Uses.............................................................................................................. 12 3.5.1 On-Site Land Uses .................................................................................... 12 3.5.2 Surrounding Land Uses............................................................................. 12 4.0 METHODS AND SURVEY LIMITATIONS ...............................................................13 4.1 Literature Review.................................................................................................. 13 4.2 Field Reconnaissance ............................................................................................ 13 4.2.1 Vegetation Community and Land Cover Mapping ................................... 15 4.2.2 3.2.2 Flora ................................................................................................. 15 4.2.3 3.2.3 Fauna ................................................................................................ 15 4.2.4 Special-Status and/or Regulated Resources .............................................. 16 4.2.5 Survey Limitations .................................................................................... 19 5.0 RESULTS .........................................................................................................................21 5.1 Vegetation Communities, Land Covers and Floral Diversity ............................... 21 5.1.1 California Sagebrush ................................................................................. 22 5.1.2 Coyote Brush Scrub .................................................................................. 25 5.1.3 Menzies’ Goldenbush Scrub ..................................................................... 25 5.1.4 California Annual (Non-Native) Grassland .............................................. 26 5.1.5 Coast Live Oak–Toyon Woodland ........................................................... 27 5.1.6 Southern Willow Scrub ............................................................................. 27 5.1.7 Southern Cottonwood–Willow Riparian Forest........................................ 28 5.1.8 Arundo-Dominated Riparian .................................................................... 29 5.1.9 Mulefat Scrub............................................................................................ 29 5.1.10 White Alder–Mulefat Scrub ...................................................................... 30 6938-02 1 October 2012 Draft Biological Technical Report for the Coastal Treatment Plant Export Sludge Force Main Project TABLE OF CONTENTS (CONTINUED) Section Page No. 5.1.11 Herbaceous Wetlands................................................................................ 30 5.1.12 4. Yerba Mansa Meadow .......................................................................... 30 5.1.13 Coastal Valley and Freshwater Marsh ...................................................... 31 5.1.14 Open Water ............................................................................................... 31 5.1.15 Open Channel............................................................................................ 32 5.1.16 Developed ................................................................................................. 32 5.1.17 Disturbed Land.......................................................................................... 32 5.1.18 Ruderal ...................................................................................................... 33 5.1.19 Ornamental ................................................................................................ 33 5.1.20 Floral Diversity ......................................................................................... 33 5.2 Wildlife ................................................................................................................. 34 5.2.1 General Wildlife........................................................................................ 34 5.3 Special-Status Biological Resources..................................................................... 35 5.3.1 Special-Status Plants ................................................................................. 35 5.3.2 Special-Status Wildlife ............................................................................. 36 5.4 Special-Status Vegetation Communities............................................................... 38 5.5 Wildlife Corridors and Habitat Linkages .............................................................. 39 5.6 Regional Resource Planning Context ................................................................... 39 5.6.1 Relationship to the Central-Coastal Subregion NCCP/HCP .................... 39 6.0 PROJECT IMPACTS .....................................................................................................41 6.1 Definition of Impacts ............................................................................................ 41 6.1.1 Direct Temporary Impacts ........................................................................ 41 6.1.2 Indirect Impacts ........................................................................................ 41 6.1.3 Cumulative Impacts .................................................................................. 42 6.2 Impacts to Vegetation Communities and Land Covers ........................................ 42 6.2.1 Direct Impacts ........................................................................................... 42 6.2.2 Indirect Impacts ........................................................................................ 43 6.3 Impacts to Special-Status Plant Species ............................................................... 54 6.4 Impacts to Special-Status Wildlife Species .......................................................... 54 6.4.1 Direct Impacts ........................................................................................... 54 6.4.2 Indirect Impacts ........................................................................................ 56 6.5 Impacts to Jurisdictional Waters ........................................................................... 58 6.5.1 Direct Impacts ........................................................................................... 58 6.5.2 Indirect Impacts ........................................................................................ 59 6938-02 2 October 2012 Draft Biological Technical Report for the Coastal Treatment Plant Export Sludge Force Main Project TABLE OF CONTENTS (CONTINUED) Section Page No. 6.6 Impacts to Wildlife Corridors and Habitat Connectivity ...................................... 61 6.6.1 Direct Impacts ........................................................................................... 61 6.6.2 Indirect Impacts ........................................................................................ 61 6.7 5Impacts to Regional Resource Planning ............................................................. 61 7.0 SIGNIFICANT IMPACTS .............................................................................................63 7.1 Explanation of Findings of Significance............................................................... 63 7.2 Vegetation Communities or Land Covers............................................................. 64 7.2.1 Significant Impacts to Vegetation Communities or Land Covers ............ 64 7.2.2 Impacts to Vegetation Communities or Land Covers Determined to be Less than Significant ................................................................................. 65 7.3 Special-Status Plant Species ................................................................................. 65 7.4 Special-Status Wildlife Species ............................................................................ 65 7.4.1
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