Talone Lake Vector Habitat Remediation Project Biological Technical Report October 20, 2017 | WSO-02 Prepared for: Weston Solutions, Inc. 5871 Dryden Place, Suite 101 Carlsbad, CA 92008 Prepared by: HELIX Environmental Planning, Inc. 7578 El Cajon Boulevard La Mesa, CA 91942 Talone Lake Vector Habitat Remediation Project Biological Technical Report Prepared for: Weston Solutions, Inc. 5871 Dryden Place, Suite 101 Carlsbad, CA 92008 Prepared by: HELIX Environmental Planning, Inc. 7578 El Cajon Boulevard La Mesa, CA 91942 October 20, 2017 THIS PAGE INTENTIONALLY LEFT BLANK TABLE OF CONTENTS Section Page ES EXECUTIVE SUMMARY ................................................................................................................ ES-1 1.0 INTRODUCTION ................................................................................................................................ 1 1.1 History ................................................................................................................................. 1 1.2 Location............................................................................................................................... 1 1.3 Existing and Surrounding Land Use .................................................................................... 2 1.4 Topography and Soils .......................................................................................................... 2 1.5 Current Site Conditions ....................................................................................................... 2 1.6 Ownership ........................................................................................................................... 3 1.7 Project Description ............................................................................................................. 3 2.0 METHODS ......................................................................................................................................... 4 2.1 General Biological Survey ................................................................................................... 4 2.2 Jurisdictional Delineation .................................................................................................... 4 2.3 Focused Surveys .................................................................................................................. 4 2.4 Nomenclature ..................................................................................................................... 5 3.0 RESULTS ........................................................................................................................................... 6 3.1 Vegetation Communities/Habitats ..................................................................................... 6 3.1.1 Southern Riparian Forest ....................................................................................... 6 3.1.2 Cismontake Alkali Marsh ....................................................................................... 7 3.1.3 Freshwater Marsh .................................................................................................. 7 3.1.4 Mule Fat Scrub ....................................................................................................... 7 3.1.5 Open Water ........................................................................................................... 7 3.1.6 Baccharis Scrub ...................................................................................................... 7 3.1.7 Diegan Coastal Sage Scrub - including Landscaped and Disturbed ....................... 8 3.1.8 Non-native Grassland ............................................................................................ 8 3.1.9 Disturbed ............................................................................................................... 9 3.1.10 Developed .............................................................................................................. 9 3.2 Plants .................................................................................................................................. 9 3.3 Animals ............................................................................................................................... 9 3.4 Jurisdictional Areas ............................................................................................................. 9 4.0 SENSITIVE RESOURCES ................................................................................................................... 11 4.1 Sensitive Vegetation Communities/Habitats .................................................................... 11 4.2 Sensitive Plant Species ...................................................................................................... 11 4.3 Sensitive Animal Species ................................................................................................... 12 5.0 REGIONAL AND REGULATORY CONTEXT ....................................................................................... 13 5.1 Federal Government ......................................................................................................... 13 5.2 State of California ............................................................................................................. 14 5.3 City of Oceanside .............................................................................................................. 15 i TABLE OF CONTENTS (cont.) 6.0 IMPACTS ......................................................................................................................................... 17 6.1 Direct Impacts ................................................................................................................... 17 6.1.1 Sensitive Vegetation Communities/Habitats ....................................................... 17 6.1.2 Sensitive Plant Species ......................................................................................... 18 6.1.3 Sensitive Animal Species ...................................................................................... 18 6.1.4 Sensitive Plant and Animal Species with Potential to Occur ............................... 18 6.1.5 Jurisdictional Areas .............................................................................................. 18 6.2 Cumulative Impacts .......................................................................................................... 19 7.0 PROPOSED AVOIDANCE, MINIMIZATION AND MITIGATION MEASURES ...................................... 20 7.1 Mitigation for Habitat Impacts ......................................................................................... 20 7.1.1 Sensitive Vegetation Communities/Habitats and Jurisdictional Areas ................ 20 7.2 Avoidance, Minimization, and Mitigation Measures During Construction ...................... 22 8.0 CERTIFICATION/QUALIFICATION .................................................................................................... 26 9.0 REFERENCES ................................................................................................................................... 27 LIST OF APPENDICES A Bird Survey Reports (2017 and 2013) B Plant Species Observed – Talone Lake Project Area C Animal Species Observed/Detected – Talone Lake Project Area D Sensitive Species Potential to Occur – Talone Lake Project Area ii TABLE OF CONTENTS (cont.) LIST OF FIGURES No. Title Follows Page 1 Regional Location ............................................................................................................................. 2 2 Project Vicinity (USGS Topography) ................................................................................................. 2 3 Project Vicinity (Aerial Photograph) ................................................................................................ 2 4 Vegetation and Sensitive Resources ................................................................................................ 6 5 USACE Waters of the U.S. .............................................................................................................. 10 6 CDFW Jurisdictional Habitats ......................................................................................................... 10 7 Vegetation and Sensitive Resources/Impacts ................................................................................ 18 8 USACE Waters of the U.S./Impacts ................................................................................................ 18 9 CDFW Jurisdictional Habitats/Impacts ........................................................................................... 18 10 Proposed Revegetation .................................................................................................................. 20 LIST OF TABLES No. Title Page 1 Vegetation Communities/Habitats .................................................................................................. 6 2 Waters of The U.S. and CDFW Jurisdictional Habitats .................................................................. 10 3 Proposed Impacts to Vegetation Communities/Habitats .............................................................. 17 4 Project Impacts to Jurisdictional Areas .......................................................................................... 19 5 Project Changes to Wetland Habitat ............................................................................................