Toxic Contaminants in the Surficial Sediments of the Fore River, Maine. Natural Resource Damage Assessment Trustees Casco Bay Estuary Partnership
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1 Toxic Contaminants in the Surficial Sediments of the Fore River, Maine Natural Resource Damage Assessment Trustees Casco Bay Estuary Partnership
2 Sediment Contaminants Serious threat to estuarine ecosystems worldwide. Adverse effects include loss of biodiversity and abundance of benthic organisms, and bioaccumulation further up the food chain. Introduced via direct discharge, run-off, and atmospheric deposition. Most contaminants quickly bind to finegrained sediment near source.
3 2004 Fore River Study Goal: Produce a baseline Determine the potential for adverse effects Polycyclic Aromatic Hydrocarbon concentrations Natural Resource Damage Assessment Metals, Polychlorinated Biphenyls, and Dioxin concentrations Casco Bay Estuary Partnership
4 Fore River Fore River Industrial History Coal Gas Plants Electrical Plants Factories Foundries Gas Stations Tanneries Population Center Busiest Oil Port on East Coast
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8 Sediment Collection
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10 Sediment Quality Guidelines Assessment of the levels of sediment contaminants. Edward Long, NOAA calculated thresholds based on observed toxic effects. ERL Effects Range-Low: Adverse effects seen in 10% of the data. ERM Effects Range-Median: Adverse effects seen in 50% of the data. There are specific ERL & ERM guidelines for each contaminant.
11 Polycyclic Aromatic Hydrocarbons MANY constituent compounds Toxic, carcinogenic, mutagenic Sources include: Oil spills Industrial effluent By-product of combustion, including auto exhaust Tires, street and parking lot materials
12 Parts per Billion 50,000 45,000 40,000 35,000 30,000 25,000 20,000 15,000 10,000 5,000 0 ERM ERL 278,300 63, , Station
13 Metals Cadmium Chromium Copper Lead Mercury Nickel Silver Zinc Potential Adverse Effects Toxic Carcinogenic Mutagenic Nervous system damage Adverse developmental and reproductive effects Potential Sources Tanneries Metal foundries Coal burning power plants Paint processing Sacrificial anodes Leaded fuels Batteries And many others
14 Parts per Million Mean Sediment Cadmium Concentrations ERL Station
15 Parts per Million Mean Sediment Chromium Concentrations ERL Station
16 Parts per Million Mean Sediment Copper Concentrations ERM ERL Station
17 Parts Per Million Mean Sediment Lead Concentrations ERM ERL Station
18 Parts per Million Mean Sediment Mercury Concentrations ERM ERL Station
19 Parts per Million Mean Sediment Nickel Concentrations 50 ERM ERL Station
20 Parts per Million Mean Sediment Silver Concentrations ERL Station
21 Parts per Million Mean Sediment Zinc Concentrations 400 ERM ERL Station
22 Polychlorinated Biphenyls Sources Electrical transformers Capacitors Hydraulic fluids Banned for use in new equipment in 1977, still found in older equipment Adverse Effects Mutagenic Carcinogenic Developmental abnormalities and reduced growth Adverse reproductive effects
23 Parts per Billion Mean Total PCB Concentrations ERL Station
24 Dioxin Sources Processing plants that include chlorination Most notable in the Casco Bay region are pulp and paper mills Trash incinerators Adverse Effects 2,3,7,8- tetrachlorodibenzo-pdioxin most toxic Lethal, carcinogenic, and mutagenic Tissue damage and immunotoxic effects octachlorodibenzo-pdioxin least toxic
25 ng/kg Total Dioxin Concentrations 18,000 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2, Station 2,3,7,8-TCDD Other Compounds OCDD
26 Parts per Trillion Total Dioxin TEQ Station
27 Parts per Trillion Total Dioxin TEQ SW01 SW02 IB Station
28 Conclusions Fulfilled goal of producing a baseline of sediment contaminants. Levels of PAH s, Mercury and Copper are high enough at some sites to produce frequent toxic effects. Levels of almost all measured contaminants are high enough at many sites to produce occasional toxic effects.
29 Questions? Mike Doan Friends of Casco Bay
Toxic Contaminants in the Surficial Sediments of the Fore River, Maine
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