Document e177MzXaJvEY30QBjyjaw5aBq

FILE NAME: Chrysler (CHR) DATE: 1977 DOC#: CHR134 DOCUMENT DESCRIPTION: Memo with Asbestos Survey Data m k O ia im iM S- C. E nders * k O tpanm tM D. P. Gl*gier Plant M anager In d u strial Hygiene ASBESTOS SURVEY nt* CM* 0jjien Stam ping and A saem bly 01*1*10 E m p lo y ee b Ind. R elations O* -Q ctober 2 1. 1977 T ren to n Chem ical PlfeAt'OfliC* C hrysler C en ter C iu st 4 5 3 .0 0 .0 0 CIMS ( 417-05-19 The OSHA a sb e sto s sta n d a rd C FR 1910. 1001(i)(3)(ii) stipulates that environ m ental m o n itoring be of such freq u en cy and p a tte rn as to re p re s e n t with reaso n ab le a c c u ra c y the le v els of em ployee exposure. In com pliance with this req u irem en t, the w rite r investigated em ployee exposure levels at all work stations a sso ciated with the recen tly introduced disc brake riveting p ro c e ss. The re s u lts of th is in v estig atio n a re liste d on the attached data s h e e ts o p p o site th e c o r r e s p o n d in g jo b d e s c rip tio n o r a r e a lo catio n . We w ere accom panied by M r. E. L om bard, S upervisor, Employee and F acility P ro tectio n , and M r. C layton, L ocal 372 C hief Stew ard, at various tim es throughout this survey. D uring the co u rse of this survey, two la rg e m ake-up a ir units w ere installed on the east end of the F ric tio n P ro d u cts Building. The intake of the north m a k e -u p a i r u n it is in c lo s e p r o x im ity to th e e x h a u st of th e #2 B aghouse. A ir sam ple No. 22 in d icates th at a sb e sto s em issio n s are being recircu lated back into the F rictio n P roducts Building through the north m ake-up a ir unit. Industrial Hygiene recom m ends that the #2 Baghouse exhaust be relocated so as to d irect any fugitive baghouse em issio n s away from the north m ake-up a ir unit. It is good In d u strial Hygiene p ractice to design building a ir inlets and outlets in acco rd an ce w ith the attach ed A. C. G. I. H. sketch. The p re lim in a ry in v e stig atio n conducted on A ugust 29, 1977, indicated that yall grinding, d rillin g and riv etin g o p eratio n s w ere in com pliance with the tw o f ib e r /c c OSHA P e r m is s ib le E x p o su re L im it. H ow ever, the A ugust 29 data ind icated sig n ifican t a irb o rn e a sb e sto s lev els at the pad only inspection w ork statio n s. T his operation, which was perform ed at unventilated W ork- / , O -M atic fix tu re s, involved the v isu al inspection and sorting of disc brake linings after they had been ground on both sides at the Besly rough grin d ers. Note that em ployees p e rfo rm in g -th e pad only inspection operation on A ugust 29t 1977, w ere re q u ire d to w ear approved air-p u rify in g re sp ira to rs. This re s - , p ira to r req u ire m en t had re su lte d fro m previous experience with the dise brake linings ground on the Hamm ond flat finisher. Upon r e c e ip t of th e A u g u st 29, 1977, la b o r a to r y r e s u lt s , the w r ite r r e t u r n e d " -V* to th e F ric tio n P ro d u c ts fa c ility on S ep tem ber 12, 1977, to obtain additional TF-189 S. C. E n d e r s II Re: A sbestos Survey 10-21.77 a i r s a m p le s a t th e pad only in sp e c tio n w ork s ta tio n s . T he S e p te m b e r 12. 1077 a ir sam ples w ere analyzed im m ediately and the pad only inspection of ground lin in g s w as d isco n tin u ed on S ep tem b er 13, 1977. In com plianc e w ith Section 1910. 1001(i)(3), the affected em ployees w ere notified that the a ir sam ples obtained at the pad only inspection operation indicated ex cessiv e exposure to a irb o rn e asbestos fibers at this location. D u rin g th e w eek of S e p te m b e r 12, 1977, dow ndraft ex h au st v e n tila tio n w as in s ta lle d at the pad only in sp ectio n w ork statio n s. In o rd e r to p ro p erly ev alu ate the effectiveness of the pad only inspection exhaust ventilation, a th ird se t of a ir sa m p les was obtained on S ep tem b er 21, Id ? ? . The S ep tem b e r 21 1977, a i r sa m p le s in d ic a te d th a t the dow n d raft ex h a u st v e n tila tio n p ro v id ed good co n tro l of pad only inspection o p erations p erfo rm ed on disc b ra k e linings w hich had not been ground on the B esly rough g rin d e r. The pad only inspection exhaust ventilation also provided adequate c ontrol for those em ployees inspecting disc brak e linings which had been ground, w ashed, and d rille d at the w et d rillin g o p eratio n . On S ep tem b er 21, 1977. the d rill p re ss o p erato rs w ere the only em ployees handling ground disc brake pads p rio r to the wet d rillin g operation, (see a ir sam p le No. 18). D uring the week of S eptem ber 26, 1977, the plant in sta lle d additional exhaust v en tilation at the north and south d rill p re s s e s . A fourth set of a ir sam p les obtained on O ctober 6, 1977, indicated that the d rill p re s s exhaust, located d irectly above the ground linings, did protect the d rill p re ss operator from the resid u al asb esto s dust which ad h eres to the ground pads. Due to p ro d u c tio n s c ra p p ro b le m s, the pad only in sp ectio n of ground linings w as r e estab lish ed on O ctober 6, 1977, (see a ir sam ple No. 21). Evidently, the downdraft W ork-O -M atic bin exhaust ventilation will provide m arginal control of airb o rn e asb esto s when em ployees are req u ired to inspect ground linings. We recom m end th a t the In d u strial E ngineering and Q uality C ontrol D ep art m e n ts in v e s tig a te th e p o s s ib ility of e lim in a tin g th e pad only in s p e c tio n ot> ground pads. Em ployee exposure at the pad only inspection operations w ill be re -e v a lu a te d durinc the O SH A -required sem i-an n u al asb esto s survey. ' DANIEL P . GLAZIER Industrial H ygienist A ttachm ents cc: L. F. Andre G. D. B enson F. A. Burnett l. P.. 1!>rb'>':- G. C. H ill J. A. Johnston C. C.. l.ancucki i\ r . ; CHRYSLER 0924 N. M cCallum K. G. M itch ell l.. W. T e r r y . M. n 'B rirn D ata Sheet TRENTON FRICTION PRODUCTS L o ca tio n A ugust 29, 1977 Concentration (fibers, greater thah 5 m ic r o n s in length, per cubic centimeter of air) OSHA P e rm is s ib le E x p o s u re L im it 1) P erso n al a ir sam ple, long riv etin g I. 1 (inner disc brake) 2) Personal air sample, short riveting 0. 3 (outer disc brake) 3) Personal air sample, south disc 0. 5 brake drill press operator 4) Personal air sam ple, north disc 0. 5 brake drill press operator 5) P ersonal a ir sam ple, south B esly 0.4 finish grinder operator 6) Personal a ir sam ple, north Besly 0. I finish grinder operator 7) P ersonal a ir sam ple, south B esly 0.2 -- / finish grinder inspector 8) P ersonal a ir sam ple, south B esly 0.4 rough g rinder operator 9) P ersonal a ir sam ple, north Besly l. 1 rough grinder operator 10) P e rs o n a l a ir sa m p le , pad only in sp e c tio n , after Besly rough grin d er operation, tim eweighted average co n cen tratio n b ased on 4 hours on and 4 hours off, (em ployee was w earing an air-p u rify in g re s p ira to r) 37.8 CHRYSLER 02497