The use of pore-water toxicity tests to evaluate potential contaminated groundwater intrusion areas
- Great Lakes Environmental Center, Traverse City, MI (United States)
Pore-water toxicity tests using Ceriodaphnia dubia were used to evaluate the lake bottom in areas of suspected contaminated groundwater intrusion from a Superfund Site on the shore of a northern Michigan lake. Toxicity tests using Ceriodaphnia dubia were performed using sediment pore-water from 27 lake sites and samples from 12 lake-based and land-based groundwater monitoring wells. The toxicity test results were used to guide subsequent phases of the preliminary investigation which indicated that sediment pore-water from the intrusive areas were clearly toxic and did not meet state water quality regulations. Toxicity tests using lake-based groundwater samples from the suspected groundwater intrusion area were toxicologically, chemically and physically similar to the contaminated pore-water and to the contaminated groundwater plume. Phase 1 TIE procedures were inconclusive, but granular activated carbon treatment removed 79 percent of the toxicity from contaminated pore-water, and 77 percent of the toxicity from contaminated groundwater. These findings, along with supportive well hydraulic head data and benthic community data indicate that contaminated groundwater is entering the lake through the sediments and degrading the pore-water quality and the benthic community.
- OSTI ID:
- 37407
- Report Number(s):
- CONF-9410273-; TRN: IM9519%%331
- Resource Relation:
- Conference: 15. annual meeting of the Society of Environmental Toxicology and Chemistry (SETAC), Denver, CO (United States), 30 Oct - 3 Nov 1994; Other Information: PBD: 1994; Related Information: Is Part Of Society of Environmental Toxicology and Chemistry 15th annual meeting: Abstract book. Ecological risk: Science, policy, law, and perception; PB: 286 p.
- Country of Publication:
- United States
- Language:
- English
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