Document 82ojV039NqvmMgqae3yeY42oB

FILE NAME: Asbestos Cement Pipe and Sheet (ACPS) DATE: DOC#: ACPS0 KhMENT DESCRIPTION:hZZ^^ 1' ,, Lt.. L I,' - r.r. ' :.; t,,- ; .__ /. L --f-i-_--c-E---- Research &Engineering April 14, 1972 E. M. Fenner - Denver SPEClAL DUST SURVEY TRANSITE PIPE FIELD OPRATIONS Persona"! dust sa1r:ples on several field operations that are perfomed on TRANSITE pipe have been re-tested. Samples taken on April 10, 1972 were obtained outside between PD #1 Building and Nevl Business Building. Strong drafts were present b1owing dust av~ay from the operator. Due to rain, those taken on April 13, 1972 were inside the walkway connecting PO #1 and PD #2. The large doors on both sides of the walkway ,1ere opened and a moderate draft was blowing away from the operator. Bob Anderson performed the operations and Joe Macko and Tom Bordas conducted the samp1ing. Pipes used for testing viere 4 in. Telephone Duct, 6 in. CL150 Hater Pipe and 8 in. CL2400 Sewer Pipe. A11 samp1es were of 20 minute duration. The test results are as fo11ows: Operation Manual Machining Power Machining Hand Rasping Harrmer and Chisel (Tapp-ing for Sewer Saddle) Ski11 Saw Cutting Date Piee Siz~ F/cc 4~10--72 4 in, 0.4 6 in. 1.2 8 in. 0.4 4-10-72 6 in. 0.6 8 in. 0.4 4-10-72 6 in. 1.6 8 in. 1.2 4-10-72 8 in. 1.2 4-13-72 4 in. 4.1 6 ; n. 2.9 8 in. 4. 5 MTB004041 cc: G. L. s~~a11 ov1 - Denver R. S. Anderson Manville