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Methylene chloride survey report, Conoco Chemicals, Westlake, Louisiana, Final Report Task III.

Authors
Cohen-J
Source
NIOSH 1979 Mar; :1-59
Link
NIOSHTIC No.
00122927
Abstract
Occupational exposure to methyl-chloride (74873) was studied. An industrial hygiene survey was conducted at Conoco Chemicals, Westlake, Louisiana, to determine methyl-chloride concentrations. Breathing zone samples were taken by charcoal tubes and sampling pump assembly from 14 methyl-chloride production workers for about 8 hours on all four shifts. The loader group was exposed to the highest mean concentration of 1.8 parts per million (ppm) with top operators exposed to a mean concentration of 0.7ppm and the first controller, 0.2ppm. The average exposure to workers was 1.1ppm. Eight hour time weighted average (TWA) concentrations for these area samples ranged from 0.8 to 5.9ppm with an average concentration of 1.7ppm. All of the area samples showed methyl-chloride recovery in the backup tube (19 to 44 percent of the total amount of methyl- chloride found). The authors conclude that although measurable amounts of methyl-chloride exist, the TWA exposure of workers was below the OSHA standard of 5.00ppm. However, some minor problems exist with the analytical method used to determine methyl-chloride in air.
Keywords
NIOSH-Contract; Contract-210-76-0158; Health-surveys; Air-sampling; Chlorinated-hydrocarbons; Chemical-manufacturing-industry; Chemical-industry-workers;
CAS No.
74-87-3
Publication Date
19790301
Document Type
Final Contract Report
Funding Type
Contract
Fiscal Year
1979
NTIS Accession No.
PB83-156299
NTIS Price
A05
Identifying No.
Contract-210-76-0158
Source Name
SRI International, Menlo Park, California, NIOSH, Cincinnati, Ohio
State
LA; CA; OH
Performing Organization
SRI International, Menlo Park, California
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