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Jw* 22, 19T3 Hr. J. A. EeUer, Super-rtsor ^rwcnnel Services Sectissi General Services Subject; Asbestos Fiber Rainstan* from. Seers Model So. 798.17831 - Step Vacua* Clowner As requested, -we evaluated asbestos fiber emissions fiat the Seers and Roebuck tociel Bo. 753.17831 shop vacuum elener* Ibis vmcmaa cleaner Is intended to be used In lieu of compressed air clean up of asbestos laden brake on brake 1 mmA Inns. ' dust Tto Sears vacuum bas two varan motors each bevies Its dw discharge. fttch discharge has a paper and a cloth type filter, de contaminant is deposited la a *5 gn*Dnn plastic dnmu Section 1910.93a of the Federal Register specifies; asbestos fiber la elr deter- sln&tlcsts to m-mrply with the provialaofl of the Occupational Safety sod Health Act (OSEA.) will be deteasiaed by phase microscopy and collected at two liters per minute 00 a 37 m open face type AA HI1*11 pore menbrane filter or Its equivalent. Ia order to conduct an isokinetic efficiency of the -vacuum cleaner. It would bave been necessary to deviate drastically fren the prescribed aranplioE rate and from the open face filter mode, thereby yielding ssznple results with no standard to oatqiare the results to* Bierefore, It was decided to place the vacuum cleaner In a mall sealed room with no air changes taking place, and the only air movement In 13k roam vr-*1* be that generated by the discharge of the vacuum cleaner. The men chosen held a volume of 830 ft? cf air. Qe vacuus was placed in the of Idle roan end then five T~n*g station were set up around the rocs equidistant from the varans* cleaner. Van pounds of asbestos fiber iMulnt-ing material was then tannred op over a 12 minute period. Tie current OSHA SoeshoM Halt Value for airborne asbestos fiber Is 5 fibers create than 5 microns la length per milllllte-x- of air with a downward revision to 2 fibers greater than 5 microns in length per milliliter of air scheduled for July 1, 1976. The results of all five air munplea taken daring the test cf the vaciasn cleaner are -eH within the 5 fiber and 2 fiber greater than 5 microns In length per ml of air BSPs. He feel that the Sears Model 753-17831 shop vacuum is acceptable fra an asbestos fiber standpoint, but special precaution* will be required idiea emptying wTM1 i lianlTip; the varans*. An approved dust respirator far jneunoco- nlosis producing dust efrVH be wa -dfaen cleaning the varans*, The dust In the plastic drum nbould be mams fl fra the drum wet and then disposed of In properly labeled sealed container*. tte filter* on discharge parts *hnu1fl also be dis posed of mh*" they become loaded rather than attracting to them. These filter* should be disposed of In properly labeled sealed container*. 007991 PRODUCED BY FORD 105461 \o o% o\ r-t** * i o B tfrB b w t HodlS w |to. 758,178?! Shop Yacuan Claanar ^..jji.Agra 1 tt i 1 I s 2 S i tt 3 !I I 1 4* D !C *4 %a s r& 0 r( R 1 II s a SI a sI n i4 007992 PRODUCED BY FORD