Document Kz6qoow4ovjRdEQqBJ4MJ4oKr

1 PLAINTIFF'S EXHIBIT DOW-1229 INDUSTRIAL HYGIENE REPORT ASBESTOS SURVtY CELL SERVICE BLOCK 56 LOUISIANA DIVISION CRI NO. FILE NO. LAD-IH-79.02 DATE April 30, 1979 AUTHOR Dannie Kennedy CHECKED / f.PlILt. DATE X- "7 ? SUMMARY The asbestos in air monitoring for 1978 has been completed in the Cell Service block. Survey results were satisfactory and well below the acceptable threshold limit value of 2 fibers per cubic centimeter greater than five (5) microns in length. The highest exposure recorded was 0.10 fibers per cc of air; there were 21 samples recording less than 0.01 fibers per cc. Due to the low results obtained in routine time-weighted sampling, it is recommended that short duration excursion sampling be emphasized in future surveys. GO O Good housekeeping, strict safe operating procedures, and a constant vigil for problem areas are the most important considerations for a successful abatement program. Employees must be informed of the survey results and must review the consequences of over-exposure to asbestos fibers. (See attachment 2.) CD PO CO DISTRIBUTION M. F. Currier - 2303 G. W. Daigre - 2501 C. J. Weber, Jr. - 5601 E. P. Edwards - 3701 C. L. Melancon - 4701 S. T. Richardson - 5601 G. H. Watkins - 2306 File (2) LAD Library (10) - 2507 MIDLAND *R. D. Olson - 607 L. W. Rampy - 1803 D. J. Roberts - 2020 M. Swank - 1803 CRI(6) - 566 *F. D. Axe - Pittsburg *R. L. Daniel - Freeport (B-101) *S. A. Goode - OCD *R. J- McCormick - Strongsville *Neil Murray - Sarnia * SUMMARY ONLY INTRODUCTION The required asbestos in air monitoring for 1978 has been completed. The survey serves to protect the employees against over-exposure, pinpoint problem areas and fulfill the requirements of the federal Occupational Safety and Health Act. DISCUSSION In addition to everyday safety equipment, operators are required to wear disposable paper suits, rubber gloves and proper dust respirators when handling or working with asbestos. The safe procedures for handling asbestos should be discussed with each new employee before entering the work area and reviewed annually with the experienced operators as part of the ongoing Industrial Hygiene Education Program. EXPERIMENTAL Sampling Method Personnel samples are collected from the operators' breathing zone with a millipore filter (37 mm diameter; 0.8 micron pore size) mounted on an open face filter holder and attached to the operators' lapels. These cassettes are connected to monitoring pumps calibrated with a soap bubble meter to operate at a rate of 1.5 to 2.0 liters per minute. Area samples are collected utilizing the same equipment and method as the personnel samples. Analytical After obtaining the sample on the millipore filter, a four-square-grid section is cut from the exposed filter and placed atop a drop of clear mounting solution. The sample is centered on a microscope slide, covered with a cover slip, and allowed approximately 15 minutes to clear up before the fiber counting may begin. (The mounting solution is prepared by placing 3 ml each of diethyl oxalate and dimethyl phthalate in a container with 0.6g of ground up plain white millipore filter paper which dissolves into a clear solution in approximately three days.) The samples are magnified 500 times with the Reichert Zetopan optical microscope using the Nomarski interference contrast. All fibers over 5 microns in length with a 31 length to width ratio are counted as fibers (only one of the four squares is selected for a fiber count.) After the square-grid is selected to be counted, 12 passes are required with the microscope to cover the entire square. All fibers greater than 5 microns in length are counted. To obtain the fibers/cc concentration (greater than 5 microns in length) the following calculation is used. -3- Fibers/cc = count ( > 5 microns in length) x sizing factor (92) for filte cc's of air (sampling time in minutes x flow rate of pump) Standards are compared with other locations to confirm the integrity of the counting and analytical determination of fibers present. RESULTS (See Attachment 1) Monitoring results of 29 samples indicate all samples were well below the present TLV of 2 fibers > 5 jj, in length per cubic centimeter. Highest recorded sample was 0.10 fibers per cc, while 21 samples were less than 0.01 fibers per cc. (Results were rounded off to the nearest hundredth.) Eleven (11) personnel samples were collected from the operators' breathing zones. A high of 0.05 fibers per cc was recorded, five samples showed 0.01 fibers, and six samples recorded < 0.01 fibers per cubic centimeter. The eighteen (18) stationary samples recorded a high of 0.10 fibers per cc in the drawing area near the raker on D 513. Two samples recorded 0.01 fibers per cc and the remainder were less than 0.01 fibers per cc. RECOMMENDATIONS Short-term excursion sampling is recommended in future sampling to better determine if problems exist in some jobs. CONCLUSIONS The monitoring results were satisfactory and well below the established threshold limit value of two fibers per cubic centimeter. However, due to the hazardous nature of asbestos, housekeeping and good safe operating procedures remain the most important considerations for a good abatement program. This must be a daily, job-by-job program to be successful and to offer the greatest protection to the employee. The Cell Service employees must be informed of this survey's results and the consequences of over-exposure reviewed. (See Attachment 2.) STO I 7 CD PC cn sb su: oGa;o c in3. 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INGESTION: some evidence indicates that swallowed asbestos may INCREASE CHANCES OF STOMACH CANCER, DUST INHALATION: SHORT TERM: INHALATION OF HIGH CONCENTRATIONS OF THE DUST MAY CAUSE MODERATE DISCOMFORT. INHALATION OF MODERATELY HIGH CONCENTRATIONS MAY CAUSE DISCOMFORT. LONG TERM: INHALATION OF THE ASBESTOS FIBERS IN CONJUNCTION WITH SMOKING HAS BEEN SHOWN TO INCREASE CHANCES OF LUNG CANCER BY ABOUT 90 TIMES THAT OF A PERSON WHO NEITHER SMOKES NOR WORKS WITH ASBESTOS. CAN ALSO CAUSE A SERIOUS LUNG DISEASE CALLED ASBESTOSIS. CA ALSO CAUSE CANCER OF THE CHEST LINING, COMMENTS: proper respirator is required when working with asbestos, BSHorvath 6/22/76