Post on 03-Jan-2016
NorCal SETAC 2001
Seafood Contamination and Consumption
CA overviewCA overview
Mercury and gold miningMercury and gold mining
AgricultureAgriculture
Persistent Contaminants of Human Health Concern in Sport Fish from the Central Valley and San Francisco Bay
COLLABORATORS
J.A. Davis and B.K. GreenfieldSan Francisco Estuary Institute
C. Roberts, R. Fairey, G. Ichikawa, and M. StephensonMoss Landing Marine Laboratory
D. CraneDFG Water Pollution Control Laboratory
Consumption Advisories
Interim Sport Fish Advisory for the Bay and Delta
» Issued by OEHHA in 1994 and still in effect. Concern over human exposure to residues of methylmercury, PCBs, dioxins, and organochlorine pesticides. Developmental toxicants and carcinogens.
» At most 2 meals per month of Bay sport fish, and sturgeon and striped bass caught in the Delta.
» More restrictive for pregnant women and children under 6: at most one meal per month.
» A regulatory trigger Advisories also exist or are in
development for several Coast Range and Sierra foothill water bodies
Advisory for the Sacramento River watershed is under consideration
Regional Monitoring Program
Seven popular Bay species: striped bass, halibut, leopard shark, white croaker, shiner surfperch, jacksmelt, white sturgeon
Seven popular fishing locations throughout the Bay
Mercury, PCBs, dioxins, and organochlorine pesticides
Most recent results from 1997, also data from1994
Most recent sampling in 2000 Report on 1997 sampling available:
www.sfei.org
Delta Fish Study
Funded by Deltakeeper and the Central Valley Regional Water Quality Control Board
One time study in 1998 Two popular species: largemouth bass
and white catfish 18 fishing locations, including locations
on the San Joaquin River Mercury, selenium, arsenic, PCBs, and
organochlorine pesticides Report available: www.sfei.org
CALFED Mercury Project
Sport fish sampling funded by CALFED and the Central Valley Regional Water Quality Control Board
Two year study in 1999 and 2000 Primary focus on largemouth bass,
white catfish, and striped bass, also looking at other species
32 locations, including locations on the San Joaquin River
Mercury only Data not yet available
Sacramento River Watershed Program
Sampling began in 1997 and is continuing
Main focus on largemouth bass and white catfish
13 fishing locations from Redding to northern Delta
Mercury, PCBs, and organochlorine pesticides
1997 and 1998 data available SRWP 1998-1999 Annual
Monitoring Report available at www.sacriver.org
Objectives of these studies
To determine whether persistent toxic chemicals occur in fish that are being used as human food at concentrations of potential human health concern
To track long-term trends and evaluate the effectiveness of management efforts
Screening values
Calculated following USEPA guidance
Concentrations above screening values are considered to be a “potential human health concern” and indicate the need for more detailed study
MERCURYConsistent size classesEach point is a composite or average of mulitiple individuals(except for striped bass)
Mercury (ug/g wet)
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Halibut 97Jacksmelt 97
Leop Shark 94Leop Shark 97
Sh Surfperch 94Sh Surfperch 97
Striper 94 CStriper 97 CStriper 97 I
Sturgeon 94Sturgeon 97
Wh Croaker 94Wh Croaker 97
Wh Catfish 98Wh Catfish 99Wh Catfish 00
Lm Bass 98Lm Bass 99Lm Bass 00
Striper 99
Lm Bass 98Lm Bass 99Lm Bass 00
Wh Catfish 97Wh Catfish 99Wh Catfish 00
R Trout 97R Trout 00
Lm Bass 98Lm Bass 99Lm Bass 00Pikeminn 98Pikeminn 99Pikeminn 00
Striper 99Striper 00
Sac Riv Watershed
SJ Riv Watershed
Delta
San Francisco Bay
PCBs (ng/g wet)
1 10 100 1000
Halibut 97# Halibut 00
Jacksmelt 97# Jacksmelt 00Leop Shark 94Leop Shark 97
# Leop Shark 00Shiner 94Shiner 97
# Shiner 00Striper 94Striper 97
# Striper 00Sturgeon 97
# Sturgeon 00Croaker 94Croaker 97
# Croaker 00
Wh Catfish 98Lm Bass 98
Lm Bass 98
Wh Catfish 97# Wh Catfish 99
R Trout 97Lm Bass 98
# Lm Bass 99Pikeminn 98
Sac River Watershed
SJ River Watershed
Delta
San Francisco Bay
PCBS
DDTs (ng/g wet)
0 100 200 300 400 500 600 700
Halibut 97# Halibut 00
Jacksmelt 97# Jacksmelt 00Leop Shark 94Leop Shark 97
# Leop Shark 00Shiner 94Shiner 97
# Shiner 00Striper 94Striper 97
# Striper 00Sturgeon 97
# Sturgeon 00Croaker 94Croaker 97
# Croaker 00
Wh Catfish 98Lm Bass 98
Lm Bass 98
Wh Catfish 97# Wh Catfish 99
R Trout 97Lm Bass 98
# Lm Bass 99Pikeminn 98
Carp 98
Sac River Watershed
SJ River Watershed
Delta
San Francisco Bay
DDTs