Document 4QvVqdmmYQVe2rxXQnQob0NKp

i Cc. tob-^r 30* 13^7 L'-T/ IdfirSCL^y/ r Tot L. . Thatcher, Safety Engineer* Chambers Works Coostruetier Tract A. L. Unch* Medical Division MEMWIAIDPM Asbestos Dust Exposure Control ,The preliminary personnel mocitor-ng survey earrled out during August, 1967 on Chambers Works confirmed earlier environmental surveys (lef. 1 and 2) on Chambers Works and in the Spruance Shops which demonstrated that the total particle count, not corrected for asbestos content, does not exceed one percent of the current Threshold Limit Value (TLV) established for asbestos dust by the American Conference of Governmental Industrial Hygienists (ACOXH- 1966). The personnel monitor samples were collected in filters V over four to five hour periods. Since implngers were not employed* the respirable fraction cannot be estimated but can be Ignored ae the total particle count is many orders of magnitude less than the established TLV. However* these results should not servt as s basis for complacency but rather should provide a baas for establishing permanent monitoring program. Federal and State (l.e. lew Jersey) legisla tion enacted over the past ten years has placed the burden cf proof for continuous conformance with established TLV's tVoVs\ the employer. Zn view of this major shift In responsibility for \ ambient sir quality control and the trends in compensation claim decisions, an effective Industrial Hygiene program beccoee impera tive. this responsibility becomes scute when pre-employment medical y examinations are not available to the employe*r. Standards for equipment performance and ventilation specificatione DUP 0900857 SC-DP-02000