DOCSLIB.ORG

Calleguas Creek Watershed Metals and Selenium TMDL Draft Final

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Calleguas Creek Watershed Metals and Selenium TMDL Draft Final MARCH 29,2006 Calleguas Creek Watershed Metals and Selenium TMDL Draft Final Technical Report Submitted to Los Angeles Regional Water Quality Control Board and the United States Environmental Protection Agency Prepared By Larry Walker Associates on Behalf of the Calleguas Creek Watershed Management Plan This Page Left Blank Intentionally Table of Contents 1 INTRODUCTION ..................................................................................................................................1 1.1 REGULATORY BACKGROUND ......................................................................................................................3 1.2 CALLEGUAS CREEK TMDL STAKEHOLDER PARTICIPATION PROCESS ........................................................5 1.3 ELEMENTS OF A TMDL...............................................................................................................................6 2 PROBLEM STATEMENT .....................................................................................................................7 2.1 ENVIRONMENTAL SETTING .........................................................................................................................7 2.2 WATER QUALITY STANDARDS ..................................................................................................................13 2.3 BENEFICIAL USES......................................................................................................................................14 2.4 WATER QUALITY OBJECTIVES ..................................................................................................................15 2.5 ANTIDEGRADATION...................................................................................................................................16 2.6 BASIS FOR LISTINGS..................................................................................................................................17 2.7 303(D) LISTING DATA ...............................................................................................................................17 3 CURRENT CONDITIONS...................................................................................................................19 3.1 DATA USED IN CURRENT CONDITIONS SECTION – WATER AND TISSUE....................................................19 3.2 CURRENT CONDITIONS DATA BY REACH - WATER COLUMN CONCENTRATIONS ......................................23 3.3 ASSESSMENT OF ZINC IMPAIRMENT ..........................................................................................................35 3.4 SEDIMENT DATA .......................................................................................................................................35 4 NUMERIC TARGETS .........................................................................................................................37 4.1 WATER COLUMN TARGETS .......................................................................................................................40 4.2 FISH TISSUE TARGETS ...............................................................................................................................41 4.3 BIRD EGG TARGETS ..................................................................................................................................42 4.4 SEDIMENT TARGETS..................................................................................................................................43 4.5 ALTERNATIVES CONSIDERED ....................................................................................................................43 5 SOURCE ASSESSMENT – PROCESSES AND CYCLING...............................................................44 5.1 COPPER TRANSPORT AND TRANSFORMATION ...........................................................................................44 5.2 MERCURY TRANSPORT AND TRANSFORMATION .......................................................................................46 5.3 NICKEL TRANSPORT AND TRANSFORMATION............................................................................................52 5.4 SELENIUM TRANSPORT AND TRANSFORMATION .......................................................................................54 6 SOURCE ASSESSMENT – DATA, PATHWAYS, SOURCES ...........................................................60 6.1 ESTIMATED LOADING CONTRIBUTIONS BY LAND USE TYPE .....................................................................60 6.2 PATHWAYS................................................................................................................................................64 6.3 SOURCES (GENERAL) ................................................................................................................................72 6.4 SOURCES - COPPER....................................................................................................................................85 6.5 SOURCES - MERCURY................................................................................................................................93 6.6 SOURCES – NICKEL ...................................................................................................................................99 6.7 SOURCES - SELENIUM..............................................................................................................................102 7 LINKAGE ANALYSIS – COPPER, NICKEL, AND SELENIUM .......................................................110 7.1 RELATIONSHIP BETWEEN SOURCES, TARGETS, AND ALLOCATIONS - CU, NI, SE ....................................110 7.2 HSPF HYDROLOGIC AND WATER QUALITY MODEL - CU, NI, SE............................................................111 7.3 TRANSLATING REQUISITE DISSOLVED LOADS TO EQUIVALENT TOTAL LOADS - CU, NI .........................114 7.4 POTENTIAL EFFECTS OF SUSPENDED SEDIMENT LOADS INTO MUGU LAGOON .......................................114 7.5 ACHIEVEMENT OF NUMERIC TARGETS IN REACHES ADDRESSED BY ALLOCATION PROCESS ..................119 Calleguas Creek Watershed i March 29, 2006 Final DRAFT Metals and Selenium TMDL 8 LINKAGE ANALYSIS – MERCURY.................................................................................................121 8.1 RELATIONSHIP BETWEEN SOURCES, TARGETS, AND ALLOCATIONS........................................................121 8.2 HSPF HYDROLOGIC AND WATER QUALITY MODEL ...............................................................................122 8.3 LINKAGES BETWEEN TISSUE, WATER, AND SUSPENDED SEDIMENT........................................................123 8.4 MERCURY METHYLATION AND BIOACCUMULATION...............................................................................129 8.5 ACHIEVEMENT OF NUMERIC TARGETS IN REACHES ADDRESSED BY ALLOCATION PROCESS ..................130 9 TMDL & ALLOCATIONS FOR COPPER, NICKEL, AND SELENIUM.............................................132 9.2 APPROACH - COPPER, NICKEL, AND SELENIUM TMDLS & ALLOCATIONS..............................................134 9.3 CRITICAL CONDITIONS AND SEASONAL VARIATION - COPPER, NICKEL, AND SELENIUM ........................141 9.4 LOADING CAPACITY - COPPER, NICKEL, AND SELENIUM ........................................................................143 9.5 COMPARISON OF CURRENT LOADS AND LOADING CAPACITY FOR COPPER, NICKEL, AND SELENIUM.....146 9.6 ALLOCATIONS - COPPER, NICKEL, AND SELENIUM..................................................................................147 9.7 IMPACTS OF AMBIENT SOURCES - COPPER, NICKEL, AND SELENIUM ......................................................154 10 TMDL & ALLOCATIONS – MERCURY............................................................................................156 10.1 APPROACH - MERCURY TMDL & ALLOCATIONS....................................................................................157 10.2 CRITICAL CONDITIONS & SEASONAL VARIATION - MERCURY ................................................................158 10.3 CURRENT LOADS AND LOADING CAPACITY - MERCURY.........................................................................158 10.4 ALLOCATIONS - MERCURY......................................................................................................................160 10.5 IMPACTS OF LOADING FROM AMBIENT SOURCES - MERCURY.................................................................163 11 MARGIN OF SAFETY ......................................................................................................................165 11.1 UNCERTAINTIES IN THE TMDL ANALYSIS APPLICABLE TO ALL CONSTITUENTS .....................................165 11.2 UNCERTAINTIES IN THE TMDL ANALYSIS SPECIFIC TO COPPER AND NICKEL ........................................166 11.3 UNCERTAINTIES IN THE TMDL ANALYSIS SPECIFIC TO MERCURY AND SELENIUM ................................167 11.4 SELECTION OF MARGIN OF SAFETY.........................................................................................................167 12 FUTURE GROWTH..........................................................................................................................170 12.1 GROWTH MANAGEMENT EFFORTS ..........................................................................................................171 12.2 EFFECTS OF GROWTH ON METALS AND SELENIUM LOADING..................................................................172 13 IMPLEMENTATION PLAN...............................................................................................................173
Load more

Recommended publications
  • BACKGROUND ENVIRONMENTAL REPORT Existing Conditions | January 2020
    Thousand Oaks BACKGROUND ENVIRONMENTAL REPORT Existing Conditions | January 2020 EXISTING CONDITIONS REPORT: BACKGROUND ENVIRONMENTAL Age, including mastodon, ground sloth, and saber-toothed cat CHAPTER 1: CULTURAL (City of Thousand Oaks 2011). RESOURCES Native American Era The earliest inhabitants of Southern California were transient hunters visiting the region approximately 12,000 B.C.E., who were the cultural ancestors of the Chumash. Evidence of significant and Cultural Setting continuous habitation of the Conejo Valley region began around The cultural history of the City of Thousand Oaks and the 5,500 B.C.E. Specifically, during the Millingstone (5,500 B.C.E – surrounding Conejo Valley can be divided in to three major eras: 1,500 B.C.E.) and the Intermediate (1,500 B.C.E. – 500 C.E.) Native-American, Spanish-Mexican, and Anglo-American. periods, the Conejo Valley experienced a year-round stable Remnants from these unique eras exist in the region as a diverse population of an estimated 400-600 people. During this time, range of tribal, archaeological and architectural resources. The people typically lived in largely open sites along water courses Conejo Valley served as an integral part of the larger Chumash and in caves and rock shelters; however, a number of site types territory that extended from the coast and Channel Islands to have been discovered, including permanent villages, semi- include Santa Barbara, most of Ventura, parts of San Luis Obispo, permanent seasonal stations, hunting camps and gathering Kern and Los Angeles Counties. The late 18th and early 19th localities focused on plant resources (City of Thousand Oaks 2011).
    [Show full text]
  • Calleguas Creek Watershed OC Pesticides and Pcbs TMDL Technical Report
    April 25, 2005 Calleguas Creek Watershed OC Pesticides and PCBs TMDL Technical Report Submitted to Los Angeles Regional Quality Control Board Prepared by Larry Walker Associates on behalf of the Calleguas Creek Watershed Management Plan Table of Contents 1 Introduction ...........................................................................................................................................1 1.1 Regulatory Background................................................................................................................3 1.2 Calleguas Creek TMDL Stakeholder Participation Process .........................................................4 1.3 Elements of a TMDL.....................................................................................................................5 2 Problem Statement ...............................................................................................................................6 2.1 Environmental Setting ..................................................................................................................6 2.2 Water Quality Standards ............................................................................................................13 2.3 Beneficial Uses ..........................................................................................................................13 2.4 Water Quality Objectives............................................................................................................14 2.5 Antidegradation..........................................................................................................................15
    [Show full text]
  • Assessment of Coastal Water Resources and Watershed Conditions at Channel Islands National Park, California
    National Park Service U.S. Department of the Interior Technical Report NPS/NRWRD/NRTR-2006/354 Water Resources Division Natural Resource Program Center Natural Resource Program Centerent of the Interior ASSESSMENT OF COASTAL WATER RESOURCES AND WATERSHED CONDITIONS AT CHANNEL ISLANDS NATIONAL PARK, CALIFORNIA Dr. Diana L. Engle The National Park Service Water Resources Division is responsible for providing water resources management policy and guidelines, planning, technical assistance, training, and operational support to units of the National Park System. Program areas include water rights, water resources planning, marine resource management, regulatory guidance and review, hydrology, water quality, watershed management, watershed studies, and aquatic ecology. Technical Reports The National Park Service disseminates the results of biological, physical, and social research through the Natural Resources Technical Report Series. Natural resources inventories and monitoring activities, scientific literature reviews, bibliographies, and proceedings of technical workshops and conferences are also disseminated through this series. Mention of trade names or commercial products does not constitute endorsement or recommendation for use by the National Park Service. Copies of this report are available from the following: National Park Service (970) 225-3500 Water Resources Division 1201 Oak Ridge Drive, Suite 250 Fort Collins, CO 80525 National Park Service (303) 969-2130 Technical Information Center Denver Service Center P.O. Box 25287 Denver, CO 80225-0287 Cover photos: Top Left: Santa Cruz, Kristen Keteles Top Right: Brown Pelican, NPS photo Bottom Left: Red Abalone, NPS photo Bottom Left: Santa Rosa, Kristen Keteles Bottom Middle: Anacapa, Kristen Keteles Assessment of Coastal Water Resources and Watershed Conditions at Channel Islands National Park, California Dr.
    [Show full text]
  • Draft Mitigated Negative Declaration Unit Y2 Wastewater Interceptor Rehabilitation Project (Ci 5328)
    DRAFT MITIGATED NEGATIVE DECLARATION UNIT Y2 WASTEWATER INTERCEPTOR REHABILITATION PROJECT (CI 5328) Lead Agency: City of Thousand Oaks 2100 Thousand Oaks Boulevard Thousand Oaks, California 91362 Contact: Mr. Nader Heydari (805) 449-2392 Prepared by: Padre Associates, Inc. 1861 Knoll Drive Ventura, CA 93003 (805) 644-2220 December 2020 Project No. 1902-2181 City of Thousand Oaks Unit Y2 Interceptor Rehabilitation (CI 5328) Table of Contents TABLE OF CONTENTS Page MITIGATED NEGATIVE DECLARATION ......................................................................... MND-1 1.0 INTRODUCTION ................................................................................................... 1 1.1 Purpose and Legal Authority ...................................................................... 1 1.2 Project Proponent and Lead Agency .......................................................... 1 1.3 Project Location ......................................................................................... 1 1.4 Project Background .................................................................................... 1 1.5 Project Purpose and Need ......................................................................... 1 1.6 Project Approvals and Permits ................................................................... 1 1.7 Mitigation Monitoring Plan .......................................................................... 2 1.8 Adoption of the Final Mitigated Negative Declaration ................................. 2 1.9 Preparers of this Initial
    [Show full text]
  • Phase I Report
    PHASE I REPORT June 2005 Calleguas Creek Watershed Integrated Regional Water Management Plan This Integrated Regional Water Management Plan (IRWMP) is comprised of two volumes: Volume I: Calleguas Creek Watershed Management Plan Phase I Report Volume II: Calleguas Creek Watershed Management Plan Addendum Volume I is provided as a separate document and Volume II is attached. Volume II is intended to bridge the gap between the Calleguas Creek Watershed Management Plan and the requirements for IRWMPs found in the Integrated Regional Water Management (IRWM) Grant Program Guidelines (Guidelines). The two volumes, together, are intended to be a functionally- equivalent IRWMP document. The Guidelines were prepared by the California Department of Water Resources (DWR) and the State Water Resources Control Board (SWRCB) in November 2004 to provide guidance on the process and criteria that DWR and SWRCB will use to evaluate grant applications under the IRWM Grant Program. The Grant program resulted from the passage of Proposition 50, the Water Security, Clean Drinking Water, Coastal and Beach Protection Act of 2002. IRWM is discussed in Chapter 8 of Proposition 50. p:\05\0587108_cmwd_irwmp\attachments\attach3_irwmp\camrosa_only_preface.doc PHASE I REPORT June 2005 Table of Contents Table of Contents........................................................................................................................... i List of Tables...............................................................................................................................
    [Show full text]
  • Calleguas Creek Watershed Boron, Chloride, TDS, and Sulfate TMDL
    A P R I L 2 0 0 7 C A L L E G U A S C R E E K W A T E R S H E D M A N A G E M E N T P L A N Calleguas Creek Watershed Boron, Chloride, TDS, and Sulfate TMDL Public Review Technical Report Prepared by LARRY W ALKER ASSOCIATES Submitted to LOS ANGELES REGIONAL W ATER QUALITY CONTROL BOARD AND THE UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Table of Contents Table of Contents ........................................................................................................................... i List of Tables ................................................................................................................................. v List of Figures.............................................................................................................................. vii List of Acronyms........................................................................................................................viii Definitions...................................................................................................................................viii Section 1. Introduction .............................................................................................................. 3 1.1. Regulatory Background .................................................................................................... 5 1.1.1. Chloride Regulatory History...................................................................................... 6 1.2. Calleguas Creek TMDL Stakeholder Participation Process ............................................
    [Show full text]
  • Calleguas Creek Watershed Hydrology Study Present Condition
    CALLEGUAS CREEK WATERSHED HYDROLOGY STUDY PRESENT CONDITION Moorpark Simi Valley Camarillo Thousand Oaks Ventura County Public Works Agency Watershed Protection District March 2003 CALLEGUAS CREEK WATERSHED HYDROLOGY STUDY PRESENT CONDITION Ventura County Public Works Agency Watershed Protection District March 2003 ACKNOWLEDGEMENTS This report represents the combined effort of a large number of agencies and individuals whose contributions are hereby gratefully acknowledged. Supervisor Judy Mikels Calleguas Municipal Water District US Army Corps Of Engineers, Los Angeles District City of Camarillo City of Moorpark City of Simi Valley City of Thousand Oaks Calleguas Creek Watershed Management Plan Participants The following members of the Ventura County Watershed Protection District staff have been instrumental in the creation of this hydrologic report: Scott Holder, Robin Jester, Hassan Kasraie, David Laak, Jayme Laber, Olga Ready, Louise Shi, Dolores Taylor, John Trone, Denny Tuan, Sergio Vargas CALLEGUAS CREEK HYDROLOGY REPORT TABLE OF CONTENTS I. INTRODUCTION/HISTORY A. Introduction 6 B. Historical Models 6 1. Modified Rational Hydrology Method Adoption 6 2. Figure 1 – Vicinity Map 7 3. NWS-Sacremento Model in Real-Time 8 4. COE HEC-1 Model Update 8 5. HSPF Calibration Model 9 II. METHODS AND TECHNIQUES A Modified Rational Hydrology Model-VCRAT Computer Model 10 C. Model Applications 11 D. Areal Reduction 11 E. User friendly tables 11 F. Figure 6 – AR Curve for Calleguas Mainstem above Conejo Creek 12 G. Figure 7 – AR Curve for Calleguas Mainstem below Conejo Creek 13 H. Figure 8 - AR Curve for Conejo Creek 14 I. Figure 9 - AR Curve for Revolon Slough 15 J. GIS and Calleguas Creek Hydrology Model 16 III.
    [Show full text]
  • Thousand Oaks Groundwater Utilization Project
    2775 North Ventura Road, Suite 100 Oxnard, California 93036 805-973-5700 FAX: 805-973-1440 Thousand Oaks Groundwater Utilization Project Public Draft CEQA Initial Study/Mitigated Negative Declaration August 2020 Prepared for City of Thousand Oaks 2100 Thousand Oaks Blvd. Thousand Oaks, CA 91362 K/J Project No. 1744405*02 Table of Contents List of Tables ................................................................................................................................ iv List of Figures................................................................................................................................ v List of Appendices ......................................................................................................................... v List of Acronyms ............................................................................................................................ v Section 1: Mitigated Negative Declaration ................................................ 1-1 1.1 Organization of this IS/MND ................................................................ 1-5 Section 2: Project Description .................................................................... 2-1 2.1 Overview of the Proposed Project ....................................................... 2-1 2.2 City of Thousand Oaks ........................................................................ 2-2 2.3 Project Goals and Objectives .............................................................. 2-2 2.4 Project Location .................................................................................
    [Show full text]
  • Watershed Assets Assessment Report
    16. Watershed Assets Assessment Report Jingfen Sheng John P. Wilson Acknowledgements: Financial support for this work was provided by the San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy and the County of Los Angeles, as part of the “Green Visions Plan for 21st Century Southern California” Project. The authors thank Jennifer Wolch for her comments and edits on this report. The authors would also like to thank Frank Simpson for his input on this report. Prepared for: San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy 900 South Fremont Avenue, Alhambra, California 91802-1460 Photography: Cover, left to right: Arroyo Simi within the city of Moorpark (Jaime Sayre/Jingfen Sheng); eastern Calleguas Creek Watershed tributaries, classifi ed by Strahler stream order (Jingfen Sheng); Morris Dam (Jaime Sayre/Jingfen Sheng). All in-text photos are credited to Jaime Sayre/ Jingfen Sheng, with the exceptions of Photo 4.6 (http://www.you-are- here.com/location/la_river.html) and Photo 4.7 (digital-library.csun.edu/ cdm4/browse.php?...). Preferred Citation: Sheng, J. and Wilson, J.P. 2008. The Green Visions Plan for 21st Century Southern California. 16. Watershed Assets Assessment Report. University of Southern California GIS Research Laboratory and Center for Sustainable Cities, Los Angeles, California. This report was printed on recycled paper. The mission of the Green Visions Plan for 21st Century Southern California is to offer a guide to habitat conservation, watershed health and recreational open space for the Los Angeles metropolitan region. The Plan will also provide decision support tools to nurture a living green matrix for southern California.
    [Show full text]
  • Protocol for Monitoring Aquatic Amphibians in the Mediterranean Coast Network Santa Monica Mountains National Recreation Area
    National Park Service U.S. Department of the Interior Natural Resource Stewardship and Science Protocol for Monitoring Aquatic Amphibians in the Mediterranean Coast Network Santa Monica Mountains National Recreation Area Natural Resource Report NPS/MEDN/NRR—2011/474 ON THE COVER (Pacific treefrog, Pseudacris regilla) Photograph by: Katy Semple Delaney, National Park Service, Santa Monica Mountains National Recreation Area Protocol for Monitoring Aquatic Amphibians in the Mediterranean Coast Network Santa Monica Mountains National Recreation Area Natural Resource Report NPS/MEDN/NRR—2011/474 Kathleen Semple Delaney, Seth P. D. Riley, Gary Busteed, and Morgan Robertson National Park Service Santa Monica Mountains National Recreation Area 401 W. Hillcrest Dr. Thousand Oaks, CA 91360 Stacey Ostermann-Kelm, Lena Lee, J. Lane Cameron Mediterranean Coast Network National Park Service Inventory and Monitoring Program 401 W. Hillcrest Dr. Thousand Oaks, CA 91360 Stephen Hayes University of Idaho Department of Statistical Sciences Brink Hall Moscow, ID 83844-1104 Kathryn Irvine Department of Mathematical Sciences 2-227 Wilson Hall Montana State University Bozeman, MT 59717-2400 September 2011 U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins, Colorado The National Park Service, Natural Resource Stewardship and Science office in Fort Collins, Colorado publishes a range of reports that address natural resource topics of interest and applicability to a broad audience in the National Park Service and others in natural resource management, including scientists, conservation and environmental constituencies, and the public. The Natural Resource Report Series is used to disseminate high-priority, current natural resource management information with managerial application.
    [Show full text]
  • Conservation Element 2013 Update Table of Contents
    1 City of Thousand Oaks City Council Mayor Claudia Bill-de la Peña Mayor Pro-Tem Andrew P. Fox Councilmember Jacqui V. Irwin Councilmember Joel R. Price Councilmember Al Adam Planning Commission Peter Turpel, Chair Daniel Roundtree, Vice-Chair Michael Farris, Commissioner Douglas Nickles, Commissioner Daryl Reynolds, Commissioner City of Thousand Oaks Staff John C. Prescott, AICP, Community Development Director Mark A. Towne, AICP, Deputy Director/City Planner Richard Burgess, Senior Planner October, 2013 Thousand Oaks General Plan Conservation Element 2013 Update Table of Contents Table of Contents PREFACE ...................................................................................................................... iii CHAPTER 1: INTRODUCTION ...................................................................................... 1 CHAPTER 2: PHYSIOGRAPHY ..................................................................................... 3 A. Scenic Resources ................................................................................................... 3 B. Landform Features .................................................................................................. 3 CHAPTER 3: HYDROLOGY ........................................................................................... 7 A. Lakes and Lakeshores ........................................................................................... 7 B. Streams and Creeks ............................................................................................... 8
    [Show full text]
  • Water Resources Management Plan, Santa
    WATER RESOURCES MANAGEMENT PLAN Monica Mountains National Recreation Area Lsaflta Prepared for the National Park Service by Louis Levy Ph.D and John Korkosz M.S Environmental Careers Organization April 1997 23 .4 .. 27 .0 101 .. 101 134 23 1011 40c Pacific Plot produced at National Park Service PLEASE RETURN TO Santa Monica Mountains fl National Recreation Area GIS PLEASE REThP irj TECHNICAL INFORMATION CENTER USGS 7.5 Digital Elevation Models YER Thomas Bros IVL NATlO ON MICROFILM United States Department of the Interior NATIONAL PARK SERVICE 2- Santa Monica Mountains National Recreation Area 30401 Agoura Road Suite 100 IN REPLY REFER TO Agoura Hills California 91301 N3617SAMO May 16 1997 Dear Friends of the Santa Monica Mountains NRA Water Resources Plan Please find enclosed copy of the recently approved Management April 1997 Revision for the Santa Monica Mountains National Recreation Area This update represents broad redirection of the park water resources management program in this toward interagency cooperation and watershed and ecosystem management unique unit of the National Park System and Resources If you have any questions about the plan please contact Chief of Science Management Jim Benedict at 818 597-1036 extension 233 Sincerely Arthur Eck Superintendent Enclosure PLEASE RETURN TO TECHNICAL INFORMATION CENTER DENVER SERVICE CENTER NATIONAL PARK SERVICE Water Resources Management Plan Santa Monica Mountains National Recreation Area April 1997 Revision Submitted By NJUt b1tQ _____ Chief of Science and Resources Management Santa
    [Show full text]