SAN DIEGO CREEK WATERSHED NATURAL TREATMENT SYSTEM PLAN DRAFT

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					    SAN DIEGO CREEK WATERSHED
NATURAL TREATMENT SYSTEM PLAN
   DRAFT BIOLOGICAL RESOURCES
               TECHNICAL STUDY




                                  Submitted to:

                   Irvine Ranch Water District
                 15600 Sand Canyon Avenue
                       Irvine, California 92618

                                       Contact:
                             Norris Brandt, P.E.
             Assistant to the General Manager
                                (949) 453-5590




                                  Prepared by:

                        BonTerra Consulting
               151 Kalmus Drive, Suite E-200
                Costa Mesa, California 92626
                             (714) 444-9199

                      Contact: Gary Medeiros
      Senior Project Manager, Special Projects




                             January 19, 2004
                                                                              San Diego Creek Watershed Natural Treatment System
                                                                                                                            Draft

                                                   TABLE OF CONTENTS

Section                                                                                                                         Page

1.0        INTRODUCTION............................................................................................................... 1
           1.1  REGIONAL ENVIRONMENTAL SETTING............................................................1
           1.2  LOCAL ENVIRONMENTAL SETTING ..................................................................2
                1.2.1 Existing Regional Retrofit NTS Facility Sites: 31, 32, 49 and 42:...............3
                1.2.2 Sites with Final Approval by City Local Lead Agency that are Constructed
                      – Project Level CEQA Documentation Previously Completed: 31, 32, 49
                      and 42: .......................................................................................................4
                1.2.3 Sites with Final Approval by City Local Lead Agency and Not Constructed
                      – Project Level CEQA Documentation Previously Approved: 16, 18, 22,
                      50, 51, 52, 70A, 70B, 70C, and 71: ............................................................5
                1.2.4 Sites Addressed Only in NTS EIR (Regional Retrofit Sites): 26, 27, 53, 54,
                      55, 56, 62, 64 and 67: ................................................................................6
                1.2.5 Sites for Which Applications Will Likely be Filed and CEQA Review
                      Pending Prior to Completion of NTS CEQA Review, and Concurrent
                      Project Level Review in NTS EIR: 9, 10, 11, 12A-G and 61:.....................8
           1.3  PROJECT DESCRIPTION ..................................................................................11
           1.4  SITE EVALUATION .............................................................................................13
                1.4.1 Assessment..............................................................................................14
                1.4.2 State and Federal Resource Agency Consultation ..................................15
                1.4.3 Detailed Vegetation Mapping and Preliminary Jurisdictional Wetlands
                      Assessments ............................................................................................15
                1.4.4 NTS Facility Design Refinement ..............................................................16
                1.4.5 Minimization Measures.............................................................................16

2.0        SURVEY METHODOLOGIES ........................................................................................ 16
           2.1  VEGETATION MAPPING AND SPECIAL STATUS PLANT LITERATURE
                REVIEW...............................................................................................................17
           2.2  GENERAL WILDLIFE SURVEYS AND SPECIAL STATUS WILDLIFE
                LITERATURE REVIEW .......................................................................................17

3.0        EXISTING BIOLOGICAL RESOURCES ........................................................................ 18
           3.1   VEGETATION TYPES.........................................................................................18
                 3.1.1 Sagebrush Scrub (2.3) .............................................................................18
                 3.1.2 Southern Cactus Scrub (2.4)....................................................................23
                 3.1.3 Sage Scrub-Grassland Ecotone (2.8.1) ...................................................23
                 3.1.4 Toyon-Sumac Chaparral (3.12)................................................................23
                 3.1.5 Annual Grassland (4.1) ............................................................................24
                 3.1.6 Southern Needlegrass Grassland (4.3)....................................................24
                 3.1.7 Ruderal (4.6) ............................................................................................24
                 3.1.8 Freshwater Swale (5.4) ............................................................................24
                 3.1.9 Salt Marsh (6.1)........................................................................................24
                 3.1.10 Freshwater Marsh (6.4) ............................................................................25
                 3.1.11 Herbaceous Riparian (7.1) .......................................................................25
                 3.1.12 Willow Riparian Scrub (7.2)......................................................................25
                 3.1.13 Mule Fat Scrub (7.3).................................................................................25
                 3.1.14 Sycamore Riparian Woodland (7.4) .........................................................25
                 3.1.15 Coast Live Oak Riparian Forest (7.5) .......................................................26
                 3.1.16 Arroyo Willow Riparian Forest (7.6) .........................................................26
                 3.1.17 Black Willow Riparian Forest (7.7) ...........................................................26

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                       3.1.18 Cottonwood-Willow Riparian Forest (7.8).................................................26
                       3.1.19 Open Water (12.1)....................................................................................26
                       3.1.20 Basins (12.3) ............................................................................................27
                       3.1.21 Perennial Rivers and Streams (13.1) .......................................................27
                       3.1.22 Ephemeral Drainages and Washes (13.3) ...............................................27
                       3.1.23 Flood Control Channels (13.4) .................................................................27
                       3.1.24 Dryland Crops (14.1) ................................................................................27
                       3.1.25 Irrigated (14.2)..........................................................................................27
                       3.1.26 Vineyard and Orchard (14.3)....................................................................27
                       3.1.27 Nurseries (14.6)........................................................................................28
                       3.1.28 Urban and Commercial (15.1) ..................................................................28
                       3.1.29 Transportation (15.4)................................................................................28
                       3.1.30 Ornamental Landscaping (15.5)...............................................................28
                       3.1.31 Other Developed Areas (15.6) .................................................................28
                       3.1.32 Disturbed or Barren (16.1)........................................................................28
            3.2        WILDLIFE INVENTORY ......................................................................................28
                       3.2.1 Wildlife......................................................................................................28
                       3.2.2 Wildlife Movement ....................................................................................32
            3.3        SPECIAL STATUS BIOLOGICAL RESOURCES................................................33
                       3.3.1 Definitions of Special Status Biological Resources ..................................36
                       3.3.2 Special Status Plants ...............................................................................44
                       3.3.3 Special Status Wildlife..............................................................................51
                       3.3.4 Special Status Vegetation Types .............................................................60
            3.4        APPLICABLE PLANS, POLICIES AND REGULATORY PROCESSES..............62
                       3.4.1 Local General Plans .................................................................................62
                       3.4.2 Bay and Ocean Water Quality..................................................................64
                       3.4.3 Natural Community Conservation Plan ....................................................66
                       3.4.4 Special Area Management Plan...............................................................74
                       3.4.5 USACOE 404 Permit Process..................................................................74
                       3.4.6 California Department of Fish and Game Streambed Alteration Agreement
                               75
                       3.4.7 California Department of Fish and Game Wild and Scenic Rivers
                              Designation ..............................................................................................75
                       3.4.8 California Department of Fish and Game Code Section 3503 .................76
                       3.4.9 RWQCB 401 Permit Process ...................................................................76
                       3.4.10 National Pollutant Discharge Elimination System ....................................76
                       3.4.11 Drainage Area Management Plan (DAMP) ..............................................77
                       3.4.12 Migratory Bird Treaty Act..........................................................................77

4.0        PROJECT IMPACTS ...................................................................................................... 79
           4.1  INTRODUCTION ................................................................................................. 79
           4.2  SIGNIFICANCE CRITERIA ................................................................................. 79
           4.3  DIRECT CONSTRUCTION IMPACTS ................................................................ 81
                4.3.1 Regional and Local NTS Facility Plant and Vegetation Type Impacts..... 81
                4.3.2 Regional and Local NTS Facility Special Status Plant Species Impacts107
                4.3.3 Regional and Local Facility Special Status Wildlife Species Impacts.... 111
           4.4  MAINTENANCE AND OPERATION DIRECT IMPACTS .................................. 117
                4.4.1 NTS Facility Plant Habitat...................................................................... 123
                4.4.2 NTS Facility Wildlife Habitat .................................................................. 124
           4.5  INDIRECT IMPACTS ........................................................................................ 141
                4.5.1 Noise Impacts ........................................................................................ 141
                4.5.2 Increased Dust and Urban Pollutants .................................................... 142
                4.5.3 Selenium Bioaccumulation and Toxicity to Wildlife................................ 142
R:\Projects\IRWD\Bio Tech\NTS 1-3-011804.DOC                         ii                              Biological Resources Technical Study
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5.0        MITIGATION PROGRAM ............................................................................................. 149
           5.1   PROJECT DESIGN FEATURES....................................................................... 149
           5.2   STANDARD CONDITIONS AND REQUIREMENTS......................................... 149
           5.3   MITIGATION MEASURES ................................................................................ 149

6.0        LEVEL OF SIGNIFICANCE AFTER MITIGATION....................................................... 153

7.0        REFERENCES.............................................................................................................. 153

                                                             APPENDICES

A          NTS Facility Site Biological Resources
B          Bioaccumulation Report
C          Cumulative Impact Analysis


                                                          LIST OF TABLES

        NOTE: Clicking on a table below will take you to the section of the document where the table is located. Use the
                    page number in the table of contents to scroll to the correct page of the document.


Table                                                                                                                                   Page

1          Existing Vegetation ......................................................................................................... 20
2          Special Status Plant Species with Potential to Occur in the Vicinity of Local NTS
           Facility Sites .................................................................................................................... 34
3          Special Status Wildlife Species Known to Occur in the Project Region .......................... 35
4          Summary of Site 26 Jurisdictional Impacts ..................................................................... 87
5          Summary of Site 27 Jurisdictional Impacts ..................................................................... 88
6          Summary of Site 53 Jurisdictional Impacts ..................................................................... 88
7          Summary of Site 54 Jurisdictional Impacts ..................................................................... 89
8          Summary of Site 55 Jurisdictional Impacts ..................................................................... 89
9          Summary of Site 56 Jurisdictional Impacts ..................................................................... 90
10         Summary of Site 62 Jurisdictional Impacts ..................................................................... 92
11         Summary of Site 64 Jurisdictional Impacts ..................................................................... 93
12         Permanent Vegetation Impacts ....................................................................................... 94
13         Temporary Vegetation Impacts ....................................................................................... 98
14         Wildlife Species with Potential to Occur Within Operating Regional Retrofit and
           Existing Regional Facilities.............................................................................................125
15         Grassland Acreages within 5 Kilometers........................................................................140



                                                         LIST OF FIGURES
Figure                                                                                                                    Follows Page

1          Study Area ........................................................................................................................ 1
2a-b       NTS Facility Site Locations ............................................................................................... 2
3          Site 46 San Joaquin Marsh – Augmentation .................................(located in Appendix A)
4          Site 39 Sand Canyon Reservoir.....................................................(located in Appendix A)
5          Site 13 Rattlesnake Reservoir........................................................(located in Appendix A)
6          Site 31 PA 17 West Basin ..............................................................(located in Appendix A)
7          Site 32 PA 17 East Basin ...............................................................(located in Appendix A)

R:\Projects\IRWD\Bio Tech\NTS 1-3-011804.DOC                          iii                              Biological Resources Technical Study
                                                                               San Diego Creek Watershed Natural Treatment System
                                                                                                                             Draft

8          Site 42 PA 17 – Center Basin ........................................................(located in Appendix A)
9          Site 42 PA 27 Turtle Ridge North...................................................(located in Appendix A)
10         Site 16 Trabuco Retarding Basin ...................................................(located in Appendix A)
11         Site 18 Marshburn Retarding Basin ...............................................(located in Appendix A)
12         Site 22 MCAS El Toro – Agua Chinon Lower ................................(located in Appendix A)
13         Site 50 MCAS El Toro – Irvine Auto Center ...................................(located in Appendix A)
14         Site 51 MCAS El Toro – Serrano ...................................................(located in Appendix A)
15         Site 52 MCAS El Toro – Bee Canyon ............................................(located in Appendix A)
16a        Site 70A Agua Chinon (Multiple Basins) ........................................(located in Appendix A)
16b        Site 70B Agua Chinon (Multiple Basins) ........................................(located in Appendix A)
16c        Site 70C Agua Chinon (Multiple Basins) ........................................(located in Appendix A)
17         PA 6 Marshburn .............................................................................(located in Appendix A)
18         Site 26 Woodbridge In-Line Channel Basins .................................(located in Appendix A)
19         Site 27 Barranca Off-Line Wetlands...............................................(located in Appendix A)
20         Site 53 Caltrans SR-133/I-5 Interchange .......................................(located in Appendix A)
21         Site 54 Caltrans SR-261/Walnut Avenue .......................................(located in Appendix A)
22a        Site 55 Santa Ana/Santa Fe Channel ............................................(located in Appendix A)
22b        Site 55 Santa Ana/Santa Fe Channel ............................................(located in Appendix A)
23         Site 56 El Modena Park .................................................................(located in Appendix A)
24         Site 62 San Joaquin Marsh – SAMS1 ............................................(located in Appendix A)
25a        Site 64 West Park In-Line Basins...................................................(located in Appendix A)
25b        Site 64 West Park In-Line Basins...................................................(located in Appendix A)
26a        Site 67 Cienegade Las Ranas (Northern Section) .........................(located in Appendix A)
26b        Site 67 Cienegade Las Ranas (Middle Section) ............................(located in Appendix A)
26c        Site 67 Cienegade Las Ranas (Southern Section) ........................(located in Appendix A)
27         Site 9 PA-1 Eastfoot Retarding Basin ............................................(located in Appendix A)
28         Site 11 Orchard Estates Retarding Basin ......................................(located in Appendix A)
29         Site 10 PA-1 Eastfoot Upper ..........................................................(located in Appendix A)
30a        Site 12A PA-1 Lower Orchard Estates (Multiple Basins) ...............(located in Appendix A)
30b        Site 12B PA-1 Lower Orchard Estates (Multiple Basins) ...............(located in Appendix A)
30c        Site 12C PA-1 Lower Orchard Estates (Multiple Basins) ...............(located in Appendix A)
30d        Site 12D PA-1 Lower Orchard Estates (Multiple Basins) ...............(located in Appendix A)
30e        Site 12E PA-1 Lower Orchard Estates (Multiple Basins) ...............(located in Appendix A)
30f        Site 12F PA-1 Lower Orchard Estates (Multiple Basins)................(located in Appendix A)
30g        Site 12B PA-1 Lower Orchard Estates (Multiple Basins) ...............(located in Appendix A)
31         Site 61 Eastfoot Lower ...................................................................(located in Appendix A)
32         Site 68 PA-18 .................................................................................(located in Appendix A)
33a        Site 69a PA-39 (Multiple Basins) ...................................................(located in Appendix A)
33b        Site 69b PA-39 (Multiple Basins) ...................................................(located in Appendix A)
33c        Site 69c PA-39 (Multiple Basins)....................................................(located in Appendix A)
33d        Site 69d PA-39 (Multiple Basins) ...................................................(located in Appendix A)
33e        Site 69e PA-39 (Multiple Basins) ...................................................(located in Appendix A)
34         Grassland Analysis ......................................................................................................... 41




R:\Projects\IRWD\Bio Tech\NTS 1-3-011804.DOC                       iv                             Biological Resources Technical Study