Copper and Nickel Impairment Assessment

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Copper and Nickel ImpairmentAssessment
San Francisco Bay North of Dumbarton Bridge
Regional Monitoring Program Annual Meeting
March 22, 2002
Co-Project Managers Tom Hall, Eisenberg,
Olivieri Associates Tom Grovhoug, Larry Walker
Associates
Subcontractors Pacific EcoRisk with Frontier
Geoscience
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Objectives
Copper and Nickel Impairment Assessment San
Francisco Bay North of Dumbarton

• Collect data to improve our understanding of
  aquatic toxicity of copper and ambient levels of
  copper and nickel in San Francisco Bay North of
  the Dumbarton Bridge
• Develop information to help make decisions
  regarding the 2002 303(d) listing of copper and
  nickel in the Bay

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Funding Agencies
Stormwater Programs Alameda County Clean Water
Program Contra Costa County Clean Water
Program Fairfield Suisun Urban Runoff Management
Program Marin County Stormwater Pollution
Prevention Program San Mateo Countywide
Stormwater Pollution Prevention Program Vallejo
Sanitation and Flood Control District
Industrial Dischargers CH Sugar Rhodia Inc. USS
Posco Ultramar Dow Chemical Equilon
Municipal Dischargers City of
Benicia Burlingame Wastewater Treatment
Plant Central Contra Costa Sanitation
District Central Marin Sanitation Agency Delta
Diablo Sanitation District East Bay Dischargers
Authority East Bay Municipal Utility
District Fairfield-Suisun Sewer District Las
Gallinas Valley Sanitation District Millbrae
Waste Water Treatment Plant Napa Sanitation
District Novato Sanitation District City of
Petaluma San Francisco International Airport City
and County of San Francisco City of South San
Francisco/San Bruno San Mateo Sausalito/Marin
County Sanitation District Sewerage Agency of
Southern Marin South Bayside System
Authority Marin County Sanitary District 5,
Tiburon Union Sanitary District Vallejo
Sanitation and Flood Control District
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Project Guidance
Copper and Nickel Impairment Assessment San
Francisco Bay North of Dumbarton

• Coordinating Committee
• RWQCB
• BACWA
• Industrial Dischargers
• Stormwater
• Environmental Advocacy Groups
• EPA
• DFG
• Copper Development Association
• SFEI
• South Bay Liaison

Technical Review Committee   TOXICOLOGIST
David Hansen (Hydroqual)   GEOCHEMIST Jim
Kuwabara (USGS)   HYDRODYNAMICIST Stephen
Monismith (Stanford)   ECOLOGIST PHYTOPLANKTON
Brian Palenik (UCSD Scripps)
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Dissolved Copper Concentrations at Select
Central Bay Monitoring StationsRMP Data 1993-1998
EOA, Inc 6-2-00
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Dissolved Copper Concentrations at Select North
Bay Monitoring StationsRMP Data 1993-1998
EOA, Inc 6-2-00
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Study Highlights
Copper and Nickel Impairment Assessment San
Francisco Bay North of Dumbarton

• Extension of City of San Joses work in
  development of WERs for San Francisco Bay
• Toxicity Tests for copper using the bivalve
  Mytilus edulis
• Analytical Chemistry measuring for copper,
  nickel, and conventional water quality parameters

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Sample Sites
Copper and Nickel Impairment Assessment San
Francisco Bay North of Dumbarton
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Four Sampling Events

• September 5/7, 2000 dry season glassy water
  conditions on Bay
• February 13/15, 2001 wet season turbid
  conditions on Bay
• April 22/24, 2001 wet season scheduled to
  coincide with stratified conditions
• June 13/19, 2001 dry season windy summer
  conditions

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BD15 Event 2 Value 21.6
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(No Transcript)
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(No Transcript)
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A Water Effects Ratio (WER) is the ratio of
toxicity of a given pollutant in laboratory water
to toxicity in site water. If the value of the
WER exceeds 1.0, the site water reduces the toxic
effects of the pollutant being tested.
Water Quality Objective x WER Site-Specific
Objective
For Example 3.1 ug/l x 2.67 8.3 ug/l
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Dissolved Copper SSOs and Ambient Concentrations
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Ratio of Ambient Concentrations to Dissolved
Copper SSOs
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Next Steps

• Copper / Nickel Action Plans (BACWA)
• POTWs and Storm Water Programs
• RMP Ambient Monitoring
• Triggers Follow-up Actions
• Reasonable Baseline Source Control Measures
• Metals Translators (BACWA)
• Site Specific Objective(s)
• Basin Plan Amendment

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Sampling Stations(deep and shallow)
San Pablo Bay
San Mateo Bridge
Dumbarton Bridge
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Results of Statistical Analysis of WER Values

• EC50 values for site water significantly greater
  than EC50 for lab water
• WER values are significantly greater than 1.0
• Therefore, national copper chronic criterion (3.1
  ug/l) overestimates copper toxicity in SF Bay
  waters

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Results of Statistical Analysis of WER Values
Using ANOVA

• No significant difference between shallow and
  deep stations
• Significant difference between Event 2 and other
  3 events
• Significant difference between pooled values
  north and south of Bay Bridge

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Statistical Methods for WER Value Analysis

• Kolmogorov-Smironov Test for normality
  (distribution normally distributed)
• Repeated measures ANOVA
• Significance threshold set at 95th confidence
  level (p0.05)
• Paired t-tests

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Mean WERs with 95 Confidence Intervals
Mean WERs with 95 Confidence Intervals
 
 
 
 
 
 

   
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San Jose Dissolved Copper WER
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BLM Under Predicts Toxicity
Event 2
Event 3
Event 4
BLM Over Predicts Toxicity
Round 4 -GC Central,GC North, BA40, BB15, LCB01,
LCB02, BB30, BC10, BF10, BF20 deleted