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Industrial Hygiene Report Of Radon Daughters Surveys In Foundries Using Zirconium Sand As A Molding Agent, Report No. IWS-156-04.

Authors
Bloom-TF
Source
NIOSH 1985 Oct:33 pages
Link
NIOSHTIC No.
00154849
Abstract
A survey of exposures to radon (10043922) daughters in foundries using zirconium sand as a molding agent was conducted. The survey was prompted by a report that significant concentrations of uranium and thorium decay isotopes were found in zirconium sand. Area air and bulk samples were analyzed for radon daughter activity in selected operations of five foundries that used zirconium sand as part of the molding aggregate or as a molding agent. One foundry was located in Ohio, the other four were in California. Maximum radon daughter activity in the area samples ranged from not detectable to 0.023 working level (WL). The OSHA standard for radon daughter activity is 0.33 WL. No results were available for the bulk samples due to difficulties with the analytical procedures. The author concludes that the measured levels of radon daughter activity in the foundries are extremely low. The potential for a radiological health hazard due to exposure from radon daughters in zirconium sand at this time is very low. Laboratory studies of zirconium sand and a gamma radiation survey of foundries that use zirconium sand are recommended.
Keywords
NIOSH-Author; NIOSH-Survey; Field-Study; Foundry-workers; Exposure-limits; Chemical-analysis; Industrial-environment; Air-monitoring; Exposure-levels; IWS-156-04; Region-5; Region-9;
CAS No.
10043-92-2;
Publication Date
19851031
Fiscal Year
1986
NTIS Accession No.
PB89-101075
NTIS Price
A04
Identifying No.
IWS-156-04
NIOSH Division
DSHEFS;
Source Name
Division of Surveillance, Hazard Evaluations and Field Studies, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. IWS-156-04, 33 pages, 26 references
State
CA; OH;
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