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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Environmental Effects-Based Concentrations for Weathered Diesel-Range Organics: Toxicity in Marine Water and Freshwater |
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Environmental Effects-Based Concentrations for Weathered Diesel-Range Organics: Toxicity in Marine Water and Freshwater (Number of pages: 70) (Publication Size: 1762KB)
Appendix A. Screening Toxicity Tests (Nautilus) (14 pages) (2MB) Appendix B. Final Report for Toxicity Tests (Nautilus) (241 pages) (30MB)
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| Author(s) | Hobbs W.O., C.V. Eickhoff, and K. Lee | ||||
| Description | In 2018 the Department of Ecology (Ecology) Toxics Cleanup Program (TCP) commissioned a study to establish concentration-response relationships for fresh petroleum contaminants that are protective of aquatic life in both marine water and freshwater environments. The current follow-up study (2019), establishes protective concentrations for aquatic life in both marine water and freshwater using weathered diesel-range organics (DRO), as defined by the Northwest TPH or NWTPH lab method. The tests included the marine-water organisms: topsmelt (Atherinops affinis) and purple sea urchin (Strongylocentrotus purpuratus), and the freshwater organisms: fathead minnow (Pimephales promelas) and cladoceran (Ceriodaphnia dubia). Contaminated groundwater, impacted almost exclusively by DRO, was used in all toxicity tests. Silica gel cleanup on select samples suggested that DRO were composed largely of petroleum metabolites or polar compounds. No measurable response was observed for either the marine or freshwater invertebrate species exposed to weathered DRO at the concentrations tested. The final estimate of the no-observable effects concentration (NOEC) threshold in marine waters, based on growth endpoints in topsmelt, was established at a concentration of 2.12 mg/L DRO. A NOEC was established for freshwater, based on the growth endpoint of fathead minnows, at a concentration of 3.04 mg/L DRO. |
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The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
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| Contact | Will Hobbs at 360-407-7512 or whob461@ecy.wa.gov | ||||
| Keywords | polar metabolite, weathered diesel, hydrocarbons, toxicity, NWTPH | ||||
| DATA | Environmental Information Management (EIM) #WHOB005 |
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| RELATED PUBLICATIONS | Title:
Guidance for the WDOE NWTPH-Dx Method for Testing Groundwater: Silica Gel Cleanup Protocol Revision Quality Assurance Project Plan: Guidance for the WDOE NWTPH-Dx Method for Testing Groundwater Implementation Memorandum No. 23: Concentrations of Gasoline and Diesel Range Organics Predicted to be Protective of Aquatic Receptors in Surface Waters Addendum to Quality Assurance Project Plan: Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPH) in Marine Water and Freshwater Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPH): Toxicity in Marine Water and Freshwater Quality Assurance Project Plan: Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPHs) in Marine Water and Freshwater |
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