Lower SCR Bacteria TMDL Public Works Agency Implementation Plan - - PowerPoint PPT Presentation

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Lower SCR Bacteria TMDL Public Works Agency Implementation Plan - - PowerPoint PPT Presentation

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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.

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Public Works Agency

Lower SCR Bacteria TMDL Implementation Plan

Presentation to Santa Clara River Watershed Committee

June 4, 2015

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Public Works Agency

Outline

  • 1. Regulatory Background
  • 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

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Regulatory Background

Federal Water Pollution Control Act

“Clean Water Act” - 1972

Federal Program to Regulate the Discharge of Pollutants into Waters of the United States

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Total Maximum Daily Loads

 A Total Maximum Daily Load (TMDL) is the amount

  • f a specific pollutant that a particular stream, lake,

estuary or other waterbody can 'handle' without affecting water quality standards and aquatic life

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Public Works Agency

SCR River 303(d) List

303(d) List TMDL Coliform Bacteria Effective 03/2012 Nitrogen/ Nitrate/ Ammonia Effective 04/2000 Chloride 1st reconsideration 2nd reconsideration Effective 04/2000 Effective 04/2010 pending Toxaphene Not addressed Toxicity Not addressed

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Public Works Agency

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Public Works Agency

Bacteria TMDL Requirements

MONITORING

 Receiving Water Monitoring Plan by 03/2013  Submit Outfall Monitoring Plan (with IP) by 03/2015

PLANNING

 Implementation Plan by 03/2015

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Public Works Agency

Bacteria TMDL Requirements

Implementation Plan – Participating Parties:

City of Fillmore City of Oxnard City of Santa Paula City of Ventura County of Ventura

COMPLIANCE (weekly sampling)

Weather Reach 3 Estuary Effective Dry 1 2

  • Mar. 2023

Wet 3 4

  • Mar. 2029

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Public Works Agency

Lower SCR Watershed Urban Areas

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Public Works Agency

How to Achieve Compliance?

BMP Selection for Dry Weather

 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

  • utreach/inspection)

 Identify and abate high risk source (i.e., human waste)

 Structural controls as needed (e.g., diversion to sewer,

distributed infiltration)

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Public Works Agency

How to Achieve Compliance?

BMP Selection for Wet Weather

 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

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Public Works Agency

Structural BMP Examples

 Distributed BMPs

 Cisterns  Bioretention  Vegetated swales  Green roofs  Porous/permeable

pavement

 Gross solids removal

devices

 Media filters  Catch basin inserts

  • Regional BMPs
  • Infiltration basins
  • Detention basins
  • Detention with

subsurface flow wetlands

  • Constructed surface flow

wetlands

  • Treatment facility
  • Hydrodynamic devices

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Public Works Agency

Identify Applicable WQS Run Baseline Conditions to Establish “Existing” Loads Calculate Target Load Reductions to achieve WQS Quantify Non- Structural BMPs Identify Regional BMP Opportunity Sites Develop Regional BMP Concepts and Sizing Quantify Regional BMPs Quantify Distributed BMPs BMP Prioritization Methodology:

  • Catchment prioritization based on WQ

“need”

  • BMP opportunity prioritization (considers

parcel size and ownership, proximity to storm drains, and technical constraints)

  • Map potential BMP opportunity sites
  • Feasibility assessments and costs

BMP Modeling Process Reasonable Assurance Analysis (RAA)

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Public Works Agency

Reach 3 Baseline Load (Wet Weather)

Estimated sources of wet weather Fecal Coliform in the LSCR Watershed draining to the Reach 3

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Public Works Agency

Estuary Baseline Load (Wet Weather)

Estimated sources of wet weather Fecal Coliform in the LSCR Watershed draining to the Estuary

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Non-Structural BMPs

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Proposed Regional BMPs Locations and Drainage Areas

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Proposed Regional BMP City of Ventura (Chumash Park)

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Proposed Regional BMP City of Oxnard (South Bank Park)

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Proposed Regional BMP County & City of Ventura

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Proposed Regional BMP County of Ventura (Piru)

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Proposed Regional BMP City of Santa Paula

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Proposed Regional BMP City of Fillmore

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Distributed Green Streets BMPs

http://land8.com/group/greenstreets http://bluegreenbldg.org/green-streets/green-street-projects-albany- and-emeryville/ http://localecologist.blogspot.com/2010/10/managing- stormwater-runoff-with.html

Parking Lot @ S. Oak St. City of Ventura Elmer Avenue City of Los Angeles Slide 24

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Public Works Agency

Load Reductions

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Estimated Costs

The estimated costs are preliminary and may be subject to regulatory relief pending Statewide Policy update Structural BMPs Capital Cost Annual O&M Cost Low High Low High

7 Regional Infiltration Projects

$20,000,000 $30,000,000 $700,000 $1,000,000

Total Distributed Green Streets

$150,000,000 $320,000,000 $8,900,000 $19,000,000 TOTAL $170,000,000 $350,000,000 $9,600,000 $20,000,000

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Implementation Schedule

Notes: 2016 effective date for interim waste load allocations (WLAs) 2023 effective date for dry-weather WLAs 2029 effective date for wet-weather WLAs

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Public Works Agency

Acknowledgements

 Geosyntec Consultants

 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)

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