Document 9JMR7K0v5pvmZmv75R6QjaRdL

FILE NAME: Ford (FD) DATE: 1970 Feb 20 DOC#: FD152 DOCUMENT DESCRIPTION: Memo RE Evaluation of Asbestos Worker Exposure, Brake Research Unit with Attached Data Intra Company Mr- J . A. l e l l a r , Supervisor Personnel Services Department Research and Engineering Center February 20, 1970 Snbjecti Evaluation o f Asbestos Worker Xxposure, Brake Besearch Gbit. Scien tific Building Am requested, an in d u stria l hygiene study was conducted to evaluate eorker exposure to asbestos dust In the Brake Research Chit located a t the S c ie n tific Building, Research end Xggineering Center, the r e su lts o f the s i r samples taken are contained on the attached data sheet. She operations carried on in the Brake Research Chit include the weighing and compounding o f dry asbestos and cutting, f ilin g , and abrasion wear te stin g o f the compounded asbestos brake HMne a t e r ia l. C mss operations are o f an interm ittent nature and are carried out in four separate rooms. <kily one o f these rooms i s equipped with process - exhaust v en tilatio n , while the other rooms have norami building general v en tilatio n . Although lo c a l exhaust i s present in the room where weighing and compounding are carried on, i t i# not being u tilise d fo r the operation. a M r samples taken were evaluated considering the present threshold U n it value o f fiv e mppcf and the lover le v e l o f two mppcf lis te d by the American Conference o f Governmental In d u stria l Hygienists as an Intended chen^ o f the TLT fo r asbestos d u st. As can be seen from the data* a l l ampleg a rt vlthln acceptable H a l t s . Because o f the apprehension exhibited by the employes toward th eir exposure to asb esto s, i t i s our opiniontM atm odification which involve l i t t l e or no expense are J u s t ifie d . These m odifications lnd.id moving the balance in the weighing and compounding room to an area where e x istin g fle x ib le lo c a l exhaust ducts could be placed p ro x lw l to the belance while weighing. This seme procedure could, a lso be used fo r the .ilx sr oeed in compounding. The ia a s m odification would consist o f cleaning the work bench used in the cutting snd f ilin g operation with a vacua* cleaner rather than bloving i t clean with an a i r hose. ** " 7 questions, or i f we can be of furth er in sisten ce, please do not h e sitate to contact u s. co X. M. (fciarlas X. I . Watlin g , M.S. A ttachent leax7 I. Lidi Industrial Hygienist 006759 PRODUCED BY FORD February 10, 1570 Data Sheet Haarch and EngInearing Cantar Scien tific Building Asbesto Dut Concentration Location Airborne Aebesto* IXist Concentration in M illion P artiel ________p tr Cubic Toot o f Air_____ Bireshold Limit Value $.0 rfhang o f Cireshold Limit Value scheduled fo r 1571* 2.0 1. Brake Research Area, Compounding Operation. Worker' Breathing Lon - Air Sample 0.6 2. Brake Rearch Area, Cutting and T ilin g Operation - Worker'a Breathing Lon - Air Sample 1*3 3> Brake Rearch Area, Wear Testing. General Boom Air Sample 0.7 Instrumentation) Mine Safety Appliance Monltalre Pump e ith Midget Impinger. .A nalysis! Light Field Count Technique 006760 PRODUCED B Y FORD