Document 3eK44nXYD8r906q6Rkw75DJ0E

February 4, 1992 Dow U.S.A. The Dow Chemical Compaq P 0 Box '50 Piaauem'"e LouiS'ana 70755-0^50 Rodney Bordelon Methanes Building 4601 Asbestos Sample Attached is the laboratory report for bulk identification sample. The OSHA 8-hour permissible exposure limit for asbestos is 0.2 f/cc >5 microns and the 30-minute short term exposure limit is 1 f/cc >5 microns. Please call me if you have any questions regarding this report. Attachment dsc DO A 114798 oonftdbnttai PRODUCED FOR THE ASBESTOS DATABASE DATE: MASTER No. May 29, 1992 Dow U.S.A The Dow Chemical Comcaf'v PC Be* `=0 P'aa^em.i'e lcuS'S^s 70T65 C* C Daniel Cortez Eddie Guillory Petrin Petrin cc: Rodney Bordelon Building 4106 Methanes 4601 Asbestos Monitoring Enclosed are sample results for potential exposure to asbestos. The OSHA 8-hour permissible exposure limit for asbestos is 0.2 f/cc >5 microns and the 30-minute short term exposure limit is 1 f/cc >5 microns. The results displayed are based on sampling duration. The data sheet shows the results of exposure using two methods, the Limit of Detection (LOD) and the Limit of Quantitation (LOQ). Included on the data sheet is an explanation of the method Limit of Quantitation. Thank you, Darlene S. Creel Industrial Hygiene Ext. 6181 Building 3502-E Attachment dsc ^ 114799 r. (i .'\i r T f\ rr k i ~r r . i pnOOUCIO FOR THE ASBESTOS DATABASE DATE: _ q MASTER No. \ ftjenFQTng mpmithpimo piata pprui tr- mfthaneS 1082 **LOD ***LOQ EXPOSURE GUIDELINES 8-HR. TWA LIMIT - 0.20 FIB/CC 30-MINUTE LIMIT = 1.0 FIB/CC LIMIT OF DETECTION = 7 FIB/MM2 LIMIT OF QUANTITATION = 100 FIB/MM2 DATE SAMPLE# PERSONNEL DESCRIPTION DUR(MIN) VOUL) 5/15/92 14260 *456-26-3737 Insulator: Removing asbestos insufatton from 10" steam line WET METHOD USED 30 76 * The proper protective clothing was worn during the job. Noth 7700 Respirator with HEPA fitters were worn during the Job. LOD E1B/CC <0.01 ***LOQ FIB/CC <0.51 Note: The Limit of Quantitation has been defined as 100 Fibers/MM2 using the minimum fiber loading criteria specified. In the NIOSH analytical method 7400, the stated range of the method is 100 to 1300 Fibers/MM2 filter area. Although samples below this range can be analyzed, the method has not been validated below 100 Fibers/MM2. However, the NIOSH method 7400 also establishes the estimated Limit of Detection as 7 Fibers/MM2 (Reference OSHA Std. 1910.1001, Appendix B). Based on this information, we will establish 100 Fibers/MM2 filter area as our Limit of Quantitation and 7 Fibers/MM2 filter area as our Limit of Detection (which is more representative of the actual fibers present) for asbestos monitoring. We will report both Limit of Quantitation and Limit of Detection. If only Limit of Quantitation were expressed, the minimum reportable result would calculate to be 0.04 Fibers per cc for an 8-hr. Time weighted average sample at a flow rate of 2 liters per minute and 0.6 fibers per cc for a 30 minute time weighted average short term sample at a flow rate of 2 liters per minute. ^ 1 i A oOO C-O/JFirjFNTlAi