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Industrial hygiene report of mechanical cotton picker operator exposure to DEF at Valley Picking Company, Tulare, California.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, IWS 80-18, 1980 Sep; :1-12
An industrial hygiene survey was conducted from November 14 to 17, 1978 to study mechanical cotton picker operators exposed to S,S,S- tributylphosphorotrithioate (78488) (DEF) at the Valley Picking Company (SIC-0722) in Tulare, California. The respiratory sample for DEF ranged from 17.0 to 257.0 nanograms per cubic meter (ng/m3) and the dermal samples ranged from 0.29 to 2.66 milligrams per 8 hours. The unoxidized form of DEF, folex (150505), was also detected. The folex respiratory samples ranged from 11.4 to 76.7ng/m3 and the dermal samples ranged from 0.02 to 0.09 milligrams per 8 hours. The investigators conclude that during normal weather conditions exposure concentrations could be elevated by one or two orders of magnitude and they recommend that additional respiratory and dermal sampling be conducted during these weather conditions.
NIOSH-Author; NIOSH-Survey; Field-Study; Region-10; Cotton-harvesting; Workplace-studies; Agricultural-workers; Air-sampling; Sampling-methods; Skin-exposure
Field Studies; Industry Wide
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: July 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division