Document Q6QNYYaRvyYdjMmDa5kJoMRk

FILE NAME: Asbestos Cement Pipe and Sheet (ACPS) DATE: 1972 Apr 14 DOC#: ACPS015 DOCUMENT DESCRIPTION: Unpublished Report - Special Dust Survey LL' ite ,,-1 <r(? > O' : - ,;t Research & Engineering Center April 14, 1972 I 1 E. M. Fenner - Denver SPECIAL DUST SURVEY TRANSITE PIPE FIELD OPERATIONS Personal dust samples on several field operations that are performed on TRANSITE pipe have been re-tested. Samples taken on April 10, 1972 were obtained outside between PD #1 Building and New Business Building, Strong drafts were present blowing dust away from the operator. Due to rain, those taken on April 13, 1972 were inside the walkway connecting PD #1 and PD #2. The large doors on both sides of the walkway were opened and a moderate draft was blowing away from the operator. Bob Anderson performed the operations and Joe Macko and Tom Bordas con ducted the sampling. Pipes used for testing were 4 in. Telephone Duct, 6 in. CL150 Water Pipe and 8 in. CL2400 Sewer Pipe. All samples were of 20 minute duration. The test results are as follows: Operation Manual Machining Power Machining Hand Rasping Harrcner and Chisel (Tapping for Sewer Saddle) Skill Saw Cutting C . I u.J.A^ E. (]. Bui ava Date 4-10-72 4-10-72 4-10-72 4-10-72 Pipe Size 4 in. 6 in. 8 in. 6 in. 8 in. 6 in. 8 in. 8 in. F/cc 0.4 1,2 0.4 0.6 0.4 1.6 1.2 1.2 4-13-72 4 in. 4.1 6 in. 2.9 8 in. 4.5 MTB004041 cc: 6. L, Swallow - Denver R. S. Anderson - Manville