NorCal SETAC 2001 Seafood Contamination and Consumption

1
NorCal SETAC 2001Seafood Contamination and
Consumption
2
CA overview
3
Mercury and gold mining
4
Agriculture
5
Persistent Contaminants of Human Health Concern
in Sport Fish from the Central Valley and San
Francisco Bay
6
COLLABORATORSJ.A. Davis and B.K. GreenfieldSan
Francisco Estuary InstituteC. Roberts, R.
Fairey, G. Ichikawa, and M. StephensonMoss
Landing Marine LaboratoryD. CraneDFG Water
Pollution Control Laboratory
7
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

8
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

9
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

10
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

11
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

12
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

13
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

14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)