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Title: Evaluation of soil bioassays for use at Washington state hazardous waste sites: A pilot study

The Washington State Department of Ecology (Ecology) is developing guidelines to assess soil toxicity at hazardous waste sites being investigated under the Washington Model Toxics Control Act Cleanup Regulation. To evaluate soil toxicity, Ecology selected five bioassay protocols -- Daphnia, Earthworm, Seedling, Fathead Minnow, and Frog Embryo Teratogenesis Assay Xenopus (FETAX) -- for use as screening level assessment tools at six State hazardous waste sites. Sites contained a variety of contaminants including metals, creosote, pesticides, and petroleum products (leaking underground storage tanks). Three locations, representing high, medium, and low levels of contamination, were samples at each site. In general, the high contaminant samples resulted in the highest toxic response in all bioassays. The order of site toxicity, as assessed by overall toxic response, is creosote, petroleum products, metals, and pesticides. Results indicate that human health standards, especially for metals, may not adequately protect some of the species tested. The FETAX bioassay had the greatest overall number of toxic responses and lowest variance. The seedling and Daphnia bioassays had lower and similar overall toxic response results, followed by the earthworm and fathead minnow. Variability was markedly highest for the seedling. The Daphnia and fathead minnow variability were similar to the FETAXmore » level, while the earthworm variability was slightly higher.« less
Authors:
; ;  [1] ;  [2]
  1. Washington Department of Ecology, Olympia, WA (United States)
  2. WCFWRU, Seattle, WA (United States). School of Fisheries
Publication Date:
OSTI Identifier:
49579
Report Number(s):
CONF-9410273--
TRN: 95:011599
Resource Type:
Conference
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.
Publisher:
Society of Environmental Toxicology and Chemistry, Pensacola, FL (United States)
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; WASHINGTON; LAND POLLUTION; METALS; TOXICITY; CREOSOTE; PETROLEUM PRODUCTS; DAPHNIA; SENSITIVITY; ANNELIDS; FATHEAD MINNOW; FROGS; SEEDLINGS; REMEDIAL ACTION