Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Variability of the Acute Toxicity of Drilling Fluids to Mysids 'Mysidopsis bahia'.
Author Parrish, P. R. ; Duke, T. W. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher 1988
Year Published 1988
Report Number EPA/600/D-88/212;
Stock Number PB89-120026
Additional Subjects Toxicity ; Drilling fluids ; Acuatic organisms ; Tests ; Hydrocarbons ; Mineral oils ; Reprints ; Mysidopsis bahia
Library Call Number Additional Info Location Last
NTIS  PB89-120026 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/14/1989
Collation 10p
Numerous factors affect the acute toxicity of drilling fluids (muds) to mysids (Mysidopsis bahia). 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, variability of results from tests with petroleum hydrocarbon-contaminated drilling fluids may be greater than that stated above.