Document rBOMr9a0ozJDwwdBLxN5drBLa

asbe stos concentrate on (fibers/cubic centimeter 7 5 . Ou) .33 , 2_0 , 4 . . .* .***4i0 V- ;v 'ft 44. i>n; m--- ."*>`4 * .18 . 4 .06 5 .03 6 .31 7 6.60 The current limit for asbestos is 5 This is a time weighted limit based On July 1, 1976 this limit will be reduced to 2, fibers/dihi >5.0u. vx;' f1 M. Under the current limit and based on the 2 fibefs/cm3t:);lJ|Lme weight- ed limit) the sample results indicate the air,concentrations are acceptable. The sample #7 represents the a'ik cpncentratiori during t. the complete operation which only lasted 14 ininuteS thus on a time weighted average Mr. Willetts exposure,would bp well under 2 fibers <>.. /cm3. In addition this sample was taken' with? the grinder outside of the vented area. This was done.vt^'/det^rinkiie previous air levels prior to the venting of the sander.-. All :fnture grinding should be ' performed in the vented area. / X " , ' / it should be pointed out that, the limits for asbestos will become 2 fibers/cm^ in July 1976 .and that-'a, proposed further reduction (Oct. 9, 1975 29CFR 1910.10011 ikibeing considered. The proposed . limit would reduce the level. bo; fiber per cubic centimeter for an 8 hour time - weighted average with a ceilinglimit of 5 fibers /cm3 over a 15 minute period* ,4"" Sincerely yours, ...V' s# * -f. ^cvl; JB/rid kj' T Jack Dauch, Manager Occupational Health Services - > - : U- . : ifllv- ' . I: 1 FAW 10858