Lower SCR Bacteria TMDL Public Works Agency Implementation Plan Presentation to Santa Clara River Watershed Committee June 4, 2015 1
Outline 1. Regulatory Background Public Works Agency 2. Total Maximum Daily Loads 3. SCR Bacteria TMDL 4. TMDL Implementation Plan How to achieve compliance? BMP Modeling Process (RAA) Non-structural BMPs Structural BMPs Estimated Costs Implementation Schedule 5. Acknowledgments 2
Regulatory Background Federal Water Pollution Control Act Public Works Agency “Clean Water Act” - 1972 Federal Program to Regulate the Discharge of Pollutants into Waters of the United States Slide 3
Total Maximum Daily Loads A Total Maximum Daily Load (TMDL) is the amount of a specific pollutant that a particular stream, lake, Public Works Agency estuary or other waterbody can 'handle' without affecting water quality standards and aquatic life Slide 4
SCR River 303(d) List 303(d) List TMDL Public Works Agency Coliform Bacteria Effective 03/2012 Nitrogen/ Nitrate/ Effective 04/2000 Ammonia Chloride Effective 04/2000 1 st reconsideration Effective 04/2010 2 nd reconsideration pending Toxaphene Not addressed Toxicity Not addressed Slide 5
Public Works Agency 6
Bacteria TMDL Requirements MONITORING Public Works Agency Receiving Water Monitoring Plan by 03/2013 Submit Outfall Monitoring Plan (with IP) by 03/2015 PLANNING Implementation Plan by 03/2015 7
Bacteria TMDL Requirements Implementation Plan – Participating Parties: Public Works Agency City of Fillmore City of Oxnard City of Santa Paula City of Ventura County of Ventura COMPLIANCE Weather Reach 3 Estuary Effective (weekly sampling) Dry 1 2 Mar. 2023 Wet 3 4 Mar. 2029 8
Lower SCR Watershed Urban Areas Public Works Agency 9
How to Achieve Compliance? BMP Selection for Dry Weather Public Works Agency Based on our understanding of sources of flow and bacteria into the MS4s Prioritize non-structural BMPs that: Eliminate non-stormwater flows (e.g., residential water conservation programs, commercial outreach/inspection) Identify and abate high risk source (i.e., human waste) Structural controls as needed (e.g., diversion to sewer, distributed infiltration) 10
How to Achieve Compliance? BMP Selection for Wet Weather Public Works Agency Non-structural BMPs including LID incentive programs and various source controls Structural BMPs: Regional and distributed options Infiltration-based systems and flow-through treatment (where infiltration infeasible) Prioritize lower cost non-structural BMPs first Identify potential structural retrofit opportunities, assess implementability, and prioritize projects based on cost- benefit analysis 11
Structural BMP Examples Distributed BMPs • Regional BMPs Cisterns • Infiltration basins Public Works Agency Bioretention • Detention basins Vegetated swales • Detention with subsurface flow wetlands Green roofs • Constructed surface flow Porous/permeable wetlands pavement • Treatment facility Gross solids removal devices • Hydrodynamic devices Media filters Catch basin inserts 12
BMP Modeling Process Reasonable Assurance Analysis (RAA) Identify Applicable WQS Public Works Agency Quantify Run Baseline Distributed BMPs Conditions to Establish “Existing” Loads Quantify Calculate Target Load Regional Reductions to achieve BMPs WQS BMP Prioritization Methodology: Develop Regional • Catchment prioritization based on WQ BMP Concepts and Quantify Non- “need” Sizing Structural BMPs • BMP opportunity prioritization (considers parcel size and ownership, proximity to storm Identify Regional drains, and technical constraints) BMP Opportunity • Map potential BMP opportunity sites Sites • Feasibility assessments and costs 13
Reach 3 Baseline Load (Wet Weather) Public Works Agency Estimated sources of wet weather Fecal Coliform in the LSCR Watershed draining to the Reach 3 Slide 14
Estuary Baseline Load (Wet Weather) Public Works Agency Estimated sources of wet weather Fecal Coliform in the LSCR Watershed draining to the Estuary Slide 15
Non-Structural BMPs Public Works Agency 16
Proposed Regional BMPs Locations and Drainage Areas Public Works Agency Slide 17
Proposed Regional BMP City of Ventura (Chumash Park) Public Works Agency Slide 18
Proposed Regional BMP City of Oxnard (South Bank Park) Public Works Agency Slide 19
Proposed Regional BMP County & City of Ventura Public Works Agency Slide 20
Proposed Regional BMP County of Ventura (Piru) Public Works Agency Slide 21
Proposed Regional BMP City of Santa Paula Public Works Agency Slide 22
Proposed Regional BMP City of Fillmore Public Works Agency Slide 23
Distributed Green Streets BMPs Public Works Agency http://bluegreenbldg.org/green-streets/green-street-projects-albany- and-emeryville/ http://localecologist.blogspot.com/2010/10/managing- stormwater-runoff-with.html Slide 24 Parking Lot @ S. Oak St. Elmer Avenue http://land8.com/group/greenstreets City of Ventura City of Los Angeles
Load Reductions Public Works Agency Slide 25
Estimated Costs Structural Capital Cost Annual O&M Cost Public Works Agency BMPs Low High Low High 7 Regional Infiltration $20,000,000 $30,000,000 $700,000 $1,000,000 Projects Total Distributed $150,000,000 $320,000,000 $8,900,000 $19,000,000 Green Streets TOTAL $170,000,000 $350,000,000 $9,600,000 $20,000,000 The estimated costs are preliminary and may be subject to regulatory relief pending Statewide Policy update Slide 26
Implementation Schedule Public Works Agency Notes: 2016 effective date for interim waste load allocations (WLAs) 2023 effective date for dry-weather WLAs 2029 effective date for wet-weather WLAs
Acknowledgements Geosyntec Consultants Public Works Agency Brandon Steets, PM Larry Walker & Associates Ashli Cooper-Desai, PM Responsible Party representatives: Gerhardt Hubner, Ewelina Mutkowska & David Laak (County of Ventura) David Burkhart & Michael Lapraik (Fillmore) Karen Sedlacek (Ventura) Brad Milner & Caesar Hernandez (Santa Paula) Jeremy Grant (Oxnard) 28
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