Document X7B9XR3aznRJ0Yo9wDOxNod5G

-------HBgyCORPORATigS: - *INDUSTRIAL HYGIENE SURVEY (ASBESTOS) AMERICAN BRAKEBLOK WINCHESTER* VIRGINIA AUGUST 14 - 18, 1972 PURPOSE . ' ... - - This survey was the continuation of a study which was initiated to determine the extent of < asbestos exposure to employees in. the Plant. Additional surveys will be scheduled to complete the evaluation; - - ' : -i* -- ' i -'it i-- . - . ' " * Several of the asbestos samples collected from locations pro cessing lead compounds were also selected for lead analysis i to determine airborne concentrations at various operations. Samples were collected in five1 different departments through out the Plant, including Boob Preform, Book Press, Block Preform, Strip Finishing, and Inspection and Packaging. i The results of the asbestos study disclosed two (2) locations where airborne asbestos concentrations were above the current eight-hour time weighted average exposure limit of 5 fibers/ml. Referring to Sample No. 15 in the Analyses of Air samples for Asbestos* the concentration found at Machine No. P-11, operated by C. Orndorff was 6.01 fibers/ml. Exposure levels at other Block Preform machines in the area were also elevated,, but did not reach the 5 fiber/ml exposure limit; It was noted that the mix is handled intimately by the operators during the pre form cycle. In addition to manually transferring the mix from container to the mold, the material is measured and spread by hand. As none of the Preform units are provided with adequate exhaust ventilation, the continuous manual operations are generating increased airborne concentrations of.asbestos fibers. Sample No. 564 at a concentration of 5.37 fibers/ml, was . collected at the vertical saw adjacent to the Book Press De partment. The saw was operated by R; F. Putnam, and was in nearly continuous use during collection of the sample. The unit is not provided with local exhaust ventilation, and sig nificant quantities of airborne particulates are-generated SPNY 003351