Emerging Problems? Progress on Identifying Contaminants of Concern in San Francisco Estuary Susan Klosterhaus San Francisco Estuary Institute RMP Annual.

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Presentation transcript:

Emerging Problems? Progress on Identifying Contaminants of Concern in San Francisco Estuary Susan Klosterhaus San Francisco Estuary Institute RMP Annual Meeting October 2, 2007

Emerging Contaminant Workgroup Approach Chemical Screening RMP Pilot Study/SFEI Project Status and Trends Monitoring

ng/g lipid Petreas et al O Br BDE 47 in Human Tissues Polybrominated Diphenyl Ethers (PBDEs)

BDE 47 in Sediment ( ) Sources in most segments No trend Similar or higher than other locations worldwide

PBDEs in the Bay Area Detected in: Water, WW effluent, sediment Bivalves Sport fish Harbor seals Bird eggs People Penta- and Octa-BDE mixtures banned in 2006

Potential Emerging Contaminants Pyrethroid pesticides Pharmaceuticals and Personal Care Products Perfluorinated chemicals Non-PBDE, alternative flame retardants Nanoparticles Most information Least information

Pyrethroid Pesticides Data from the Pesticide Use Reporting database of the CA Dept. of Pesticide Regulation

Aquatic Toxicity Due to Residential Use of Pyrethroid Insecticides (Weston et al. 2005) High toxicity Moderate toxicity Non-toxic Roseville, CA Hyalella azteca Freshwater amphipod

Investigations of Sources and Effects of Pyrethroid Pesticides in Watersheds of the San Francisco Bay Estuary Sum of Pyrethroids ( ) Detected in urban tributaries Source of toxicity ? Petaluma R. Napa R. Suisun Cr. San Lorenzo Cr. Coyote Cr. San Mateo Cr.

- Previously identified in Bay water RMP Pilot Study (2007) Determine concentrations in: - Influent, effluent from 2 WWTP - Surface water, 10 South Bay sites Ibuprofen Pharmaceuticals and Personal Care Products In-kind Contributions - City of Palo Alto, City of San Jose, AXYS Analytical

Pharmaceuticals and Personal Care Products in the South Bay Average concentration (ng/L) Influent > Effluent > Bay Water Concentrations in Bay << toxicity thresholds Potential Studies for Triclosan - Degradation products

Perfluorinated Chemicals (PFCs) Applications: Stain repellants, packaging materials, industrial surfactants, fire-fighting foams Persistent, bioaccumulative, toxic

Perfluorinated Chemicals (PFCs) RMP Pilot Study: Collaboration with Marine Mammal Center Health of seal population PFCs, PBDEs in harbor seal blood Exposure to apex predators

n = 18 n = 12 n = 18 n = 26 Source: Giesy and Kannan 2001 n=3 Perfluorinated Chemicals (PFCs) Perfluorooctanesulfonate (PFOS) in Seal Blood: SF Bay vs. Other Locations SF Bay

2. CA Furniture Flammability Standard (TB 117, 1975) - Polyurethane foam - CA first, only state to have standard - Penta-BDE 1. Consumer product-specific standards Alternative Flame Retardants: Flammability Standards 3. National Mattress Flammability Standard (July 1, 2007) 4. National Furniture Flammability Standard (in development)

Chemical 2002 Prod. Vol. (lbs) AccumulatesPersists Eco Tox Mam Tox Tris(1,3-dichloro-2- propyl)phosphate (TDCPP) 10-50M ?M?M?MH Triphenylphosphate (TPP) 10-50M H?L?L?H? Octyl tetrabromobenzoate (OTB) ???H?H?? Tetrabromobisphenol A (TBBPA) MLMHH Hexabromocyclododecane (HBCD) KHHHH Decabromodiphenylethane (DBDPE) ?L H??? 1,2-Bis(2,4,6- tribromophenoxy)ethane (BTBPE) 1-10M H?M?M??? Pentabromoethylbenzene (PBEB) 0 M?M?M??? Dechlorane Plus (DP) 1-10M L H??

2008 Pilot Study: Alternative Flame Retardants in San Francisco Bay with the Marine Mammal Center EBMUD, Duke University, Skidaway Institute of Oceanography Analyze bioaccumulative compounds in: - harbor seal blubber - sport fish - cormorant eggs Analyze non-bioaccumulative compounds in: - Bay surface water - WWTP influent, effluent (if feasible)

Nanoparticles Applications: electronics, biomedical, pharmaceutical, cosmetic, environmental Production: 2000 tons in 2004, 30-fold increase by A Concern in the Bay? - Bioavailable, toxic to aquatic organisms - Urban sources - Colloidal fraction or form aggregates - Adsorbent for metals and organic contaminants (

Emerging Contaminant Workgroup Approach works Making progress on new issues 5 Year Work Plan in development Surveillance monitoring continues How balance priorities? ‘New’ vs. Legacy chemicals