Calleguas Creek Watershed Metals Work Plan

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Calleguas Creek Watershed Metals Work Plan

• Ashli Cooper Desai
• Kristine Corneillie
• Larry Walker Associates

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Background-Why are We Here?

• Regulatory Requirements to Address Pollutants
  Impairing Watershed
• 303(d) List
• TMDL
• Calleguas Watershed Planning Process
• Phase 2-Get rid of the impairments
• Prepare Work Plans
• Assign Lead Sub-committees
• Get technical consultants and advisors

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Habitat and Recreation Sub-Committee

• Lead Role in Addressing Metals Impairments
• Identifying, organizing and soliciting input from
  stakeholders
• Providing commitment to Regional Board to
  complete the work
• Guiding, reviewing, and providing input on the
  process and technical work
• Developing solutions to address metals
  impairments

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Technical Consultants and Advisors

• Larry Walker Associates
• Helped develop work plans with a subset of
  Calleguas watershed group
• Provide technical work in support of committees
  activities
• Technical Advisory Committee (TAC)
• Outside experts
• Provide technical review and input into work

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TMDL Work Plan Summary

• Five Full TMDL Work Plans
• Salts
• Historic Pesticides and PCBs
• Toxicity
• Metals
• Bacteria
• Additional Pollutants and Work Plan Outlines
• Administrative and Public Process
• TMDL Tools (GIS, Modeling, etc.)
• Sediment
• Trash

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Metals Impairment

• Why are metals an issue?
• Impacts aquatic life
• Can affect wildlife
• Potentially impact people who fish and eat fish
• What needs to be done?
• Figure out exactly what the impairment is
• Data and regulatory issues
• Impacts in the watershed

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Sources of Metals

• Industrial, commercial, and residential
  activities
• Cars, automotive service facilities
• Industrial chemicals
• Landfills
• Water supply and pipe corrosion
• Agricultural chemicals and equipment

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Data and Regulatory Issues

• Why were the metals listed?
• Old data vs. new data-whats going on now?
• Historic sources-what has changed?
• Site-specific objectives
• National criteria
• Adjust to protect local conditions that are
  different from national conditions
• Water Effects Ratio

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Approach

• Conduct monitoring to find out what is happening
  now for nickel, zinc, mercury, and selenium
• Look at historic data to determine what might be
  different
• Develop site-specific objective for copper in
  lower Calleguas and Mugu Lagoon
• Remove impairments through delisting if
  appropriate
• If not, develop solution to address impairment
• TMDL could be part of solution

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Where do we need to conduct sampling? How many
times do we need to collect samples? What is
different now from 7 years ago? What other
issues need to be considered for delisting if
data shows not exceeding objectives?
Site Selection What other issues need to be
considered in study design?
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What Needs to be Done?

• Identify key stakeholders-By July
• Develop Metals Working Group
• Develop MOA or other type of agreement
• Pick Sites for Monitoring-ASAP
• Select and Contact TAC-By July
• Gather Information
• Source ID- Have any significant sources changed?
• Where in the watershed do people fish and what
  types of fish do they catch and eat?
• What other concerns about metals do stakeholders
  have?
• Spread the word

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Key Stakeholders

• Navy
• Environmental Groups
• Department of Fish and Game/Fish and Wildlife
• Regional Board
• Cities/Stormwater Agencies
• POTWs

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Technical Advisory Committee

• Small group of stakeholders put together
  preliminary list of options
• Overall group of TAC Members from which needed
  expertise can be selected
• Hasnt been fully completed, but most of needed
  areas for Metals have been identified
• 3 member TAC for WER study recommended
• Need to chose members from list and contact them
  about availability to participate in study.
• Quick review time for WER monitoring plan

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Site Selection

• Shallow and deep water
• Spatial coverage
• Different hydrodynamic segments
• Historic exceedances of dissolved copper criteria
• Varying DOC/TSS salinity levels
• Accessibility during high/low tides

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Sampling Events

• Fall
• Dry weather with calm winds
• Winter
• Episodic event (rain/storm) with more turbid
  conditions
• Spring
• Agricultural activities, wet weather
• Summer
• Wind-driven, turbid, dry weather