Document dQJeLXbo85zbzEBwr7zb8v64e

Union Carbide Agricultural Products Company, Inc. Institute Plant INDUSTRIAL HYGIENE SAMPLING RESULTS TO: Mr. G. F.Morris COPIES TO: Mr. P. C. Bowyer Building: 23_________________________________ Mr.C.V. Hill, Jr. Institute Plant______________________________ Purpose: ________ Routine X Special Request ________ Regulatory Agency Inspection Mr.L.V. Youngblood I PLAINTIFF'S EXHIBIT I UC-851 Sample Date(s): November 13, 1986 Sample Location: Boilermaker Shop_____________ Department No.: 327 Process/Activity: HAVEG Vessel Repair________________________________________ Contaminant: Asbestos Fibers Exposure Limit: OSHA 0.2f/cc(TWAg);-(TWA^) ACGIH 0.2f/cc(TWAg);;;(TWA^) Sample Type: UCC ______________________(TWA );-(TWA o X Personal X Area _______ Source ) 12 Surface Wipe _______ Other (See comments) Analytical Method: Per 29 CFR 1910.1001, Appendix A Results: _______ See Comments X See Attached Table COMMENTS: Two boilermakers were monitored for exposure to airborne asbestos fibers on the above date while making repairs to a HAVEG vessel. The material of construction was known to contain asbestos since the vessel was fabricated prior to 1980. Repairs were made by using a hammer and chisel to chip away the HAVEG material bonding several nozzles to the vessel body. Non-asbestos bonding material was later applied to complete the repairs. The vessel, which was roughly 2.5 feet in diameter and 15 feet long, was positioned horizontally in the shop and had both ends open while chipping was performed. The locations of the defects required the boilermakers to lie inside the vessel at times. Dust controls such as misting and local exhaust ventilation were not used. However, the two boilermakers wore full-facepiece airline respirators and Tyvek suits with boots and hoods. Union Carbide Agricultural Products Company, Inc. Institute Plant INDUSTRIAL HYGIENE SAMPLING RESULTS Barrier ropes and warning signs were placed around the worksite to restrict access. An area sample was obtained at the barrier to evaluate the airborne concentration of asbestos fibers. The eight-hour time-weighted average exposures for the boilermakers were below the permissible exposure limit and below the action level (i.e.,less than one-half the PEL). This is due to the fact that the duration of the chipping activity was relatively short. Had the chipping taken much longer, it is likely that the exposures would have been excessive, since the short term exposure concentrations ranged from 0.16 to 0.95 fibers/cc. The airborne concentration at the barrier rope was less than the action level. Currently, no action is required except that these monitoring results must be reviewed with all affected employees (i.e., all boilermakers who may at times repair HAVEG vessels containing asbestos). In lieu of reviewing the results, a copy of the results can be posted in the boilermaker shop where all affected employees can see it. RECOMMENDATIONS: In order to prevent excessive exposures to asbestos fibers during HAVEG repair, one or more of the following control methods should be used on future jobs when feasible. 1. A fine water mist should be applied continually at the point of chipping to prevent fibers from becoming airborne. A simple spray bottle can be used to do this. Union Carbide Agricultural Products Company, Inc. Institute Plant INDUSTRIAL HYGIENE SAMPLING RESULTS 2. Local exhaust ventilation equipment including a high efficiency particulate air (HEPA) filter system should be used to remove airborne fibers from the work area and reduce or prevent exposure. An example of such equipment would be a "negative air machine*, typically used during asbestos abatement projects. The versatility of such a machine would make it useful for other applications. 3. Use glove bags to enclose the work area on the vessel and thus prevent the spread of asbestos fibers. Though de signed primarily to enclose a section of pipe for insula tion removal they could be adapted to this type of work very easily. If you have any questions or require any assistance in pursuing these control strategies, please call me. Report Date: Signed: NOTE: January 12, 1987 Bldg. 2 Room: 172 Phone PERSONAL SAMPLE RESULTS MUST BE DISCUSSED WITH ALL AFFECTED EMPLOYEES 6105 2182k Union Carbide Agricultural Products Company, Inc. Institute Plant INDUSTRIAL HYGIENE SAMPLING RESULTS WORKPLACE LOCATION: Boilermaker Shop NAME(s) OF SAMPLER(s): J. L. Miller CONTAMINANT: Asbestos Fibers____________ OSHA PEL: TWA8 0.2f/cc TWA]? - REPORT DATE: January 12, 1987 AGGIH TLV: TWAg 0.2f/cc TWA1? UCC GUIDELINE: TWAg - TWA12 _=_ Sample Number Sample Date W4768 AA10436 W4768 AA10441 W4768 AA10437 W4768 AA10438 11-13-86 11-13-86 11-13-86 11-13-86 Sample Description BOILERMAKER C. E. Adkins C. E. Adkins J. E. Higginbotham, Jr. At barrier tape ten feet from end of vessel. Sample Time (min.) Sample Results (f/cc) 38 0.48 10 TWA8 = 0.95 0.06 48 0.16 TWAg = 0.016 52 0.085