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Main Title Acute toxicity of eight laboratory-prepared generic drilling fluids to mysids (Mysidopsis bahia)
Author Duke, T. W. ; Parrish, P. R. ; Montgomery, R. M. ; Macauley, S. D.
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher US Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory,
Year Published 1984
Report Number EPA-600/3-84-067
Stock Number PB84-199850
OCLC Number 192006192
Subjects Toxicity testing ; Drilling muds--Toxicology ; Mysidopsis
Additional Subjects Toxicology ; Drilling fluids ; Validity ; Lethal concentration ; Mysidopsis bahia ; Water pollution effects(Animals)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKCD  EPA 600-3-84-067 CEMM/GEMMD Library/Gulf Breeze,FL 02/15/2008
NTIS  PB84-199850 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 27 p. : charts ; 28 cm.
Acute toxicity tests were conducted during August-September 1983 with eight laboratory-prepared generic drilling fluids (also called muds) and mysids (Mysidopsis bahia) at the U.S. Environmental Protection Agency's Environmental Research Laboratory, Gulf Breeze, Florida. Two of the drilling fluids were tested at the Environmental Research Laboratory, Narragansett, Rhode Island, to confirm the validity of the tests conducted at Gulf Breeze. The test material was the suspended particulate phase (SPP) of each drilling fluid. The SPP was prepared by mixing volumetrically 1 part drilling fluid with 9 parts seawater and allowing the resulting slurry to settle for one hour. The material that remained in suspension was the SPP. Toxicity of the SPP of the drilling fluids ranged from a 96-hour LC50 (the concentration lethal to 50% of the test animals after 96 hours of exposure) of 2.7% for a KCl polymer mud to 65.4% for a lightly treated lignosulfonate mud. No median effect (50% mortality) was observed in three drilling fluids -- a non-dispersed mud, a spud mud, and a seawater-freshwater gel mud.
Cover title. "EPA-600/3-84-067." "May 1984." Includes bibliographical references (p. 11).