Workers Exposure to Polyaromatic Hydrocarbons at Selected Petroleum Refinery Process Unit Chevron U.S.A. Inc. Refinery, El Segundo, California.
NIOSH 1980 Sep:37 pages
Worker exposures to 23 individual or groups of polyaromatic hydrocarbons (PAH) and azo heterocyclic compounds were determined at Chevron U.S.A. Inc. Refinery, El Segundo, California, on January 18 and 19, 1980. Area and personal samples were collected in the fluid catalytic cracker (FCC) and delayed coker units using a silver membrane filter followed by Chromosorb 102. Upwind samples at the refinery boundary line were also collected. Samples were analyzed by gas chromatography and mass spectrometry. Of 39 samples from the two process units, 38 had detectable quantities of at least 4 of the 23 PAHs (or groups of PAHs). Cumulative PAH concentrations for individual samples ranged from none detected to 145.7 micrograms per cubic meter (CuM). Upwind boundary samples averaged 2.7 micrograms/m3. Personal samples at the FCC unit generally were more than 5 times greater than those from the delayed coker. Two total mass area samples collected in the FCC unit also were much higher than those collected in the coker. The 2 ring compounds were found in the highest concentrations. As the ring numbers increased the concentrations decreased. Only minimal amounts of the 5 ring and no 6 or 7 ring PAHs were detected. (No exposure standards were mentioned in the survey report).
NIOSH-Author; NIOSH-Survey; Field-Study; IWS-90-14; Region-9; Health-surveys; Petroleum-refining; Petroleum-industry; Aromatic-hydrocarbons; Air-sampling; Worker-health; Industrial-hygiene;
NTIS Accession No.
Division of Surveillance, Hazard Evaluations and Field Studies, NIOSH, Cincinnati, Ohio, 37 pages