Industrial Hygiene Report: In-Depth Survey of Monochlorobenzene and Methyl Chloride Exposure at the Dow Chemical Company Midland, Michigan.
NIOSH 1980 Mar:57 pages
In depth industrial hygiene surveys were conducted simultaneously at the monochlorobenzene (108907) (MCB) and Styrofoam expanded polystyrene production units at the Dow Chemical factory (SIC-2869) in Midland, Michigan in June 1979. Worker exposures to MCB and methyl-chloride (74873) (MeCl) were determined through personal and area environmental samples collected over four consecutive work shifts. MCB was identified in the breathing zone of MCB manufacturing unit workers with detectable concentrations of 0.25 to 1.90 parts per million (ppm). Long term area samples for MCB ranged from 0.21 to 10.5ppm. Measurable amounts of MeCl were identified in the breathing zone of Styrofoam manufacturing unit workers with concentrations ranging from 2.98 to 21.4ppm. The average MeCl concentration for all jobs monitored was 6.75ppm. Long term area samples for MeCl ranged from 4.06 to 13.8ppm. The time weighted average (TWA) exposures of workers in both units were well below current OSHA standards of 75ppm for MCB and 100ppm for MeCl. The author recommends that the factory maintain present control measures and practices, and that employee training in safety be implemented to minimize work exposures.
NIOSH-Author; NIOSH-Survey; Field-Study; IWS-100-14; Industrial-organic-chemicals; Synthetic-materials; Air-sampling; Sampling-methods; Work-environment; Occupational-health-programs; Region-5;
NTIS Accession No.
Division of Surveillance, Hazard Evaluation, and Field Studies, NIOSH, Cincinnati, Ohio, 57 pages, 33 references