Document 65429X2gY5X23nD4vBxomjpV9

FILE NAME: Asbestos Cement Pipe and Sheet (ACPS) DATE: 1972 Mar23 DOC#: ACPS014 DOCUMENT DESCRIPTION: Unpublished Report - Special Dust Survey \i v . 1 ? \V .f \ I i t ( Research & Engineering Center March 23, 1972 . M, Fenner - Denver SPECIAL DUST SURVEY TRANSITE PIPE FIELD OPERATIONS Personal dust samples were taken by the membrane Filter method on several field operations that are performed on TRANSITE Pipe. The initial tests were conducted on March S, 1972 located outside between PD #1 Building and New Business Building. Moderate to strong drafts were present primarily in a direction away from the operation. However, frequent swirling winds contaminated the sample area. Bob Anderson and Vinco Pacifico performed the operations and Larry Jarema and Joe Macko conducted the.sampling. Three different sized pipes were used during the tests; 4 in. Telephone Duct, 6 in. CL ISO Water Pipe, and 8 in. CL 2400 Sewer Pipe. The samples were of very short duration, covering the time required for a single operation. The test results are listed below. ( Operation Pipe Si2 e Sample Time min. F/cc Skill Saw Cutting Hand Rasping i\ Power Machining Manual Machining Power Cutting with Carbide Tip Blade Hammer and Chisel (Tapping for Sewer Saddle) Hand Sawing 4 in, 6 in. 8 in. 6 in. 8 in. 6 in. 8 in. 4 in. 6 in. 8 in. 4 in. 6 in. 8 in. 8 in. 4 in. 4.2 4.6 4.8 5.0 4.6 4.1 3.4 3.0 3.0 4.5 3.6 6.0 5.0 6,6 5.0 20 2 123.0 129.0 96.0 8.2 20.0 44 2~'/ 4'. IT 28.0 24,0 13.7 3.6 20.0 6.9 5.5 9.9 19.0 3.3 IWT8004039 i i. M. Fenner March 23, 1972 Page Two Due to the sampling duration, the values listed above are not truly representative of the average concentration. Therefore, specific, operations were re-tested on March 17, 1972 for the purpose of repeating the operations in order to obtain a sufficient sampling time. The results of this survey re listed below. Operation Pipe Size Power Machining 6 in. 8 in. Manual Machining 4 in. 6 in. 8 in. Hand Rasping 6 in. 8 in. Hammer and Chisel (Tapping for Sewer Saddle) 8 in. Sampling Time, m i n , __ 20 20 20 20 20 20 20 20 F/cc 1.2 A ? 4.1 O.'f* 2.5 O-^r 3.3 1. 7_ 2.5 - 2.5 1. > 2.9 j . V 2.5 l .> t_ E. J, Bulava dc cc: 6, L. Swallow - Denver R. C. Anderson MTB004040