Document ExYVwKbbQrMmJEzXBQERQLYEj

FILE NAME: WR Grace (WRG) DATE: July 1978 DOC#: WRG230 DOCUMENT DESCRIPTION: 1978 Inspection results from TabershawCooper Associates WIrv. iCn glarRk. CTaoboepresr'.iaMw.. DM. O. 2180 MILVIA STREET, BERKELEY, CALIFORNIA 94701 MAILING ADDRESS: P.O. BOX 772 TUcI.5V)p h '. ie33 jS July 1 1370 Toi "r. e 1 7 rom: f arc ~*:h: Ret r r ir.i ce ;;unt i TV tab several i-yitcjinsi Area__ ____ Outside ancient air filtered oir Pf-turner' &ir from plenums linecsi'ent i t ious material Air supplied to work aroa tr f ' - c mov 1 to systems lined itn i 31V. a"::c of fiber counts from n .`. a 1'-': L c Run- <? o: asbestos in f ifcerv '\ i.-f r y 1 ' 3.3 - 1.4 0.4 - 0.7 0.6 - 2.7 0.4 - 1.2 The r.rthod used for in1 asbestos f 1: ers was as fu ` le Lr.i :; the aivocPortions o` liocuornec(etnytpreati1ons of were mount.c on it'ns, cl-oarrc r.!t n a mount i '<*' .. :'-ed ium, and *if* j * J. >' V *i minacin'i,Cf icta'*_-rioors.cooufi ac?.;`' x;.ledTs heccunru.ntocdn,rsuro.fI.naoshoe.s'?v.*s.e;' .ontrast it-e rs mi c seen : 'Jb CrO w *. *.o*?n*v3Or` to cunct-'ntr.-'tiori;., expressed in fibers par mi-' i j iter ( or pe r:*rl it err in r- cases,- 1 , jwinc into account tne area counted, the flow rate, ?.nc t.na -i i ng time. A1thou on the samples studied so far do not snow very many - c-estos fib e r s, th p;-obar.-i.e differences between systems, workmanship, anc ir.g'.oriali; are so qretd that no conclusions -ire rat warranted regarding tic general problem of erosion.