Document GKMj6nrD9VroXQGe3O6kvOq3v

1 , '^CONSTRUCTION PRODUCTS UIVISIOH REQUEST FOR TECHNICAL SERVICE 015310 PAGE 1 NUMBER: 67701 GROUP: Zonolite DATE: April 27r 1978 CHARGE NO.: 71-174 REQUESTOR: Peter Kostic MARKETING or MANUFACTURING APPROVAL NAME: H. A. Eschenbach APPROVED: j\ ,sl WI'V 1 I l VA r PROBLEM TITLE: Environmental Evaluation - Air - Fibrous Materials. SIGNIFICANCE: The evaluation of workplace air on a periodic basis is necessary to comply with the air sampling section of the OSHA Asbestos Standard. SPECIFIC OBJECTIVE: Determine fiber counts for filter media. SUGGESTED APPROACH: Phase contrast microscopy. DEADLINE (Last day information will be of value): 2 weeks. DETAILS OF PROBLEM: Please evaluate Engineering samples from Minneapolis: MN-20 through MN-24 Products and ores involved: Libby #3, Masonry Fill and MK-4 ACCEPTED BY RESEARCH DEPT.: ASSIGNED TO: A"'- A-.-Ak.-A. C/---^ y DATE: 4 ff" ADDITIONAL COPIES: Original to Library; H.C.Tuecker, F.W.Eaton,\T.E.Hamilton, J.W.Wolter, E.S.Wood 151615 54 REQUEST FOR TECHNICAL SERVICE \ PAGE 2 LUMBER: 67701 GROUP:__________ Z0N0II3________ .ACTUAL COST: $120.00 REPORTING DATE: May 5 1976 1915381 SUMMAEY: Five engineering samples from '.Minneapolis vere received and evaluated. One sample exceeded the limit of 2.0 fibers per cc. DATA AMD ANALYSIS: See attachment. NMC:mlr attachment M. 'M. Cataldo ; 1 . 15 *sm