HHE Report No. HETA-91-076-2164, Silver Deer, Boulder, Colorado.
NIOSH 1991 Dec:19 pages
In response to a request from a representative of Silver Deer, Ltd. (SIC-3231), Boulder, Colorado a study was undertaken of lead (7439921) exposure at the facility. The Silver Deer company employed 65 persons in cutting, grinding and polishing crystal into various art objects. The crystal contained about 32% lead. A NIOSH study conducted in 1984 at this site found a mean air lead exposure of 50 micrograms/cubic meter (microg/m3) and a mean blood lead level of 29 micrograms/deciliter (microg/dl) among seven grinding room workers. Local exhaust ventilation was installed after the previous NIOSH study. This study (in 1991) found lead levels in the air from 6.6 to 35.0microg/m3 with a mean of 18microg/m3. The highest exposure was caused when lead crystal was ground on a section of a grinder that had inadequate exhaust ventilation. The mean blood lead level in grinding room workers was 12 microg/dl. These results show a statistically significant decrease in blood lead levels after the installation of local exhaust ventilation. The author concludes that a health hazard was not found at the time of the survey. The author recommends some further improvements in engineering controls and work practices.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-91-076-2164; Hazard-Unconfirmed; Region-8; Airborne-dusts; Dust-inhalation; Heavy-metals; Lead-dust; Respiratory-system-disorders; Abrasive-grinding;
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-91-076-2164, 19 pages, 20 references