HHE Report No. HETA-89-199-2033, Enseco, Inc., Rocky Mountain Analytical Laboratory, Arvada, Colorado.
NIOSH 1990 Apr:17 pages
In response to a request from the management of Enseco, Inc., concerning the Rocky Mountain Analytical Laboratory (SIC-7391) located in Arvada, Colorado, a health hazard evaluation was made regarding possible worker exposures to solvents, including methylene- chloride (75092), hexane (110543), ethyl-ether (60297), acetone (67641), and diazomethane (334883). These chemicals were used in the preparation of soil and water samples for analysis. The Organic Preparation Lab was 6500 square feet in size and consisted of various areas including soils, water, sample storage, standards preparation and extract handling. The primary operation at the site was the extraction and preparation of soil and water samples for chemical analysis. The time weighted average personal breathing zone samples for methylene-chloride ranged from 0.8 to 8.5 parts per million (ppm). The short term personal samples averaged 33ppm for a ten minute task to 286ppm for a 24 minute job. All hoods were operating within guidelines when the sashes were kept closed to the half way level. The exhaust vent on the flammable solvent cabinet was plugged by lint and dust. The author concludes that a potential health hazard existed from employee exposure to methylene-chloride in excess of 1.0ppm. The author recommends specific measures to lower the methylene-chloride levels and improve overall ventilation in the lab.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-89-199-2033; Hazard-Confirmed; Region-8; Laboratory-workers; Organic-solvents; Solvent-vapors; Chlorinated-hydrocarbons; Occupational-exposure;
75-09-2; 110-54-3; 60-29-7; 67-64-1; 334-88-3;
Hazard Evaluation and Technical Assistance;
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-89-199-2033, 17 pages, 8 references