Document B8EzdD4nenx797wDKoLqrRG0m

<2./-<25.-2. is DOW CHEMICAL U.S.A. J im location - cptortne - rrT.t, servtcv - rttttjitog_______ ENVIRONMENTAL HEALTH REPORT LOUISIANA DIVISION ASBESTOS SURVEY CHLORINE - CELL SERVICE FILE NO.. ,106-26-2 DATE February 4, 1975 AUTHOR Dannie Kennedy CHECKED____ Charlie Halphen DATE February 22 r 1975 SUMMARY Conducted an update asbestos survey at Cell Service. Results were favorable and well within OSKA standards of 5 fibers per cubic centimeter and Dow's standard of 2 fibers per cubic centimeter. The survey findings ranged from .03 to .11 fibers per cubic centimeter which indicate that the exhaust ventilation and scrubber system is functioning efficiently. Flease keep in mind that whenever such a volume of asbestos is being handled by so many people we must enforce safety precautious. Test results, potential hazards of over exposure, safe operating procedures and the wearing of proper equipment oust be discussedt/) with each individual working in the area by supervision. O o o l\5 cn DISTRIBUTION J. W. Bristol G. 17. Daigre E. D. Campbell E. P. Edwards S. T. Richardson B. J. Didier B. 2304 B. 2501 B. 2601 B. 3701 B. 2601 B. 2601 v^H. R. Hoyle - 1707 Bldg. Midland F. D. Axe - Pittsburg C. E. Caldwell - 0CD R. R. Langner - 607 Bldg . - Midland C. L. Sercu - Cleveland R. L. Daniel - B. 101 - Freeport File (2) fRAO// DOW 00640 AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY l FILE NO. 106-26-2 -2 INTRODUCTION Conducted an asbestos survey at the Chlorine Cell Service building(2603) in the diaphragm dipping-area to determine how much airborne asbestos was present and whether or not there had beexi any significant changes since the last survey. METHODOLOGY Five samples were collected with the shortest time period for any sample being three hours. The samples were collected using a calibrated Bendix pump (model C-115) with a millipone filter mounted in an open face filter holder. The sampler was attached to the operators lapel to get a breathing zone sample, while the remainder of the samples were collected at stationary points. The first sample monitored the operators breathing zone for six hours while he was working in the vicinity of the diaphragm dipping tank and the asbestos slurry mix tank. The average flow on the pump was 1.9 litus per minute. The second sample was caught by placing the sampler on the operators desk, located approximately twelve feet from the slurry mix tank, for three hours with a pump flow of 2.0 litus per minute. The third sample was collected by setting the sampler on top of the exhaust ventilation hood of the slurry mix tank for four hours with an average pump flow of 1.8 litus per minute. The fourth sample was obtained by placing the sampler on the roof in the discharge flow of the , vent scrubber for five hours with an average pump flow of 1.9 litus per minute. The last sample was caught by placing the sampler on top of a scale cabinet just behind the slurry mix tank for four hours with an average flow of 1.9 litus per minute. RESULTS Location 1. Operator 2. Desk Top 3. Hood Top 4. Scrubber Discharge 5. Scale Cabinet Top Fibers per Cubic Centimeter .04 .03 .10 .03 .11 Calibrated Flow Rate (li/min. ) 1.9 2.0 1.8 1.9 1.9 Results are well within the OSHA standard of 5 fibers per cubic centimeter greater than five microns in length and Dow's standard of 2 fibers per cubic centimeter. These results indicate that the exhaust ventilation hood and vent scrubber are working efficiently. CONCLUSIONS Although the survey results were favorable, it is important to keep in mind that whenever such a volume of asbestos is being handled by so many different people we have to enforce necessary precautious. ST0002545 00^ oou FILE NO. 106-26-2 -3 RECOMMENDATIONS Whenever operators are handling dry asbestos, they are required to vear the MSA Comfo Respirator (type 2301) with the asbestos dust cover (type 2301), rubber gloves and aprons or protective clothing. The asbestos should always be handled vet even to the point of vetting the bags before cutting them open. Practice good handling techniques to avoid spilling asbestos and never drop or throw sacks down which will result in airborne asbestos. Be careful not to get vet asbestos on tools and clothing which will dry out and give off airborne asbestos. * Housekeeping is another consideration. All broken sacks, waste material, empty . sacks and contaminated material should be kept sealed and labeled in impermeable bags and containers. Asbestos should never be blown off contaminated areas. It should be vacuumed off and placed in the proper containers. Always wash hands after handling asbestos and never carry food or cigarettes in pockets while handling asbestos. Another important point is to always be on the alert for problem areas and re port them to supervision. Have any suspected area monitored. COMMENTS The results of the survey, consequences of an overexposure and precautionary. ' measures must be emphasised and discussed with each individual working in the area. Cell Service supervision is responsible for the progress made in the area and are encouraged to maintain good housekeeping and careful handling of asbestos. ST0002546 OW 00642