Document NeZmEyK0L5J1j6Re5pL37J7ME

MICHIGAN DEPARTMENT OP HEALTH klMIMI. Aturr t Hfurrii. a o. !h hnm 4tw TtllMMt m-IUI *> nan. ht., iw.. taMiiMi mrt or m>c>cas ocoacc souncv July 2, 1965 Reply to: Vayoe County Department of Health Elolse, Michigan Chrysler Corporation Chrysler Cheatcal Division 5*37 tf. Jefferson Trenton, Hicnigan Attention: S. B. Tviss, Ri.D., President Centleaea: On May 19, 1965, we conducted a study of the various operations handling asbestos and toluene to determine whether your employees were being exposed to concentrations above our Units. Air samples were collected in the breathing zone of the workers loading raw asbestos into the mixers and after various nachlnlng operations. In general the dust found in the' samples was belov the established limit. One of the eaaples collected at Ho. 3 i Saw was slightly above the limit indicating that the ventilation and hooding should be checked to see if it is operating at maxi mum -^efficiency. Solvent samples were collected in the breathing zone of the workers during the emptying of the mixer and the loading of the portable b-*es, the shoveling of the mix into the extrusion press and stacking the extruded linings on the drying racks. The air samples collected indicated nigh concentrations during the emptying of the mixer and toe shoveling of the mixed material from the portable box into the extruder. The concentration in the ml* room was of short duration and did not appear significant compared to the time or exposure and the background concentration of 10 to 20 parts per million. However the shoveling of material occurs over a longer period of time and Is a problem. T..e average concentration during tr.e shoveling operation is 250 parts p:r million with the peax concentration exceeding this figure. T..e ventilation on the box was enacted and round to be approximately .00 cubic reet 01 air per suaute, very low according to our standards sor good ventilation. RECEIVED JUl 22 1965 S. B. TWlSS Cnryexer Corporation Chrysler Cttaiai. Division Jiy 2, a9o5 Pag* 2 i Sou* t/ps os corrective aeaeures should be Initiated it toe gooveUlng of brake lining arterial Into the extruder hopper--on*, either change the aethod of loading the extruder to reduce the nployee exposure or tvo, Increase the exhaust ventilation to 1750 cubic feet of air per alnute per box. We are enclosing the data collected during our study and If there are any questions before our next visit pleas# feel free to contact ua. Very truly yours, Dr/I3IOH 07 QCCJPATIOXAi HEALTH haron n, ncnuaaa District Engineer MMS/Ja Enclosure cc: Donald Eechelbacb, Industrial Hygienists