STP976: Variability of the Acute Toxicity of Drilling Fluids to Mysids (Mysidopsis bahia)

    Parrish, PR
    Research aquatic biologist and senior research scientist, U.S. Environmental Protection Agency Environmental Research Laboratory, Sabine Island, Gulf Breeze, FL

    Duke, TW
    Research aquatic biologist and senior research scientist, U.S. Environmental Protection Agency Environmental Research Laboratory, Sabine Island, Gulf Breeze, FL

    Pages: 8    Published: Jan 1988


    Abstract

    Numerous factors affect the acute toxicity of drilling fluids (muds) to mysids (Mysidopsis bahia). The source, composition, and age of drilling fluid sample; preparation of test material; condition of test animals; and skill and experience of the people conducting the tests can influence test results. Despite these confounding factors, our intralaboratory variation of median lethal concentrations (96-h LC50s) for six tests with a laboratory-prepared generic drilling fluid was within a factor of two; interlaboratory variation for seven commercial laboratories that tested the same generic drilling fluid was within a factor of four, the same as reported in the literature for acute toxicity tests with single chemicals. The presence of petroleum hydrocarbons in drilling fluids greatly increases toxicity and, because toxic, volatile fractions may be lost, the variability of results from tests with petroleum hydrocarbon-contaminated drilling fluids may be greater than that stated above.

    Keywords:

    drilling fluids (muds), acute toxicity, mysids, aquatic toxicology, petroleum hydrocarbons


    Paper ID: STP26721S

    Committee/Subcommittee: D34.02

    DOI: 10.1520/STP26721S


    CrossRef ASTM International is a member of CrossRef.