Document Ed5OX9ZLQ7oJRLYzBB1GNV5Oj

6/27/72 OSHA SAMPLING DATA SHEET #2 (REVISED) PLAINTIFF'S EXHIBIT Substance GP-2172 Asbestos. Standard: 29 CFR 1910.93a(b), (1) and (3) of June 7, 1972 8-hour time-weighted average: 5 fibers, longer than 5 micrometers, per cubic centimeter of air. Ceiling concentration: 10 fibers, longer than 5 micrometers, per cubic centimeter of air. Analytical Method: Fibers counted at 400-450 magnification, using phase contrast illumination, with sample mounted in high-viscosity solution of membrane filter material. Sampling Equipment: Personal sampling pump plus Millipore type M^^lter (37mm, 0.8 u pore size). Face cap is removed and filter used open race during sampling. Sample rate: 2 1/m. (liters per minute) Sample Size: Minimum period of 15 minutes for evaluation of ceiling limit. Several samples of up to 4 hours for evaluation of 8-hour average. Samples with a visible deposit may be too heavy to count. Compare with a clean filter. Heavy concentrations of-visible dust in the air (100 to 500 fibers/cc) may require short sampling periods of only 5 minutes, or less. Blanks: With each batch of samples submit two Eifoags which are subjected to exactly the same handling as for the samples except that no air is drawn through them. Label these as blanks. Shipping: The cassettes in which the samples are collected should be shipped in a suitable container, designed to prevent damage in transit. Imminent Danger Situations: Generally not applicable. 1 of 2 SGP 0006492 6/27/72 OSHA SAMPLING DATA SHEET #2 (REVISED)--Continued 'Y Serious Violation: More than 5 fibers longer than 5 micrometers, per cubic centimeter of air, for an 8-hour time-weighted average, or an individual sample of more than 10 fibers, longer than 5 micrometers, per cubic centimeter of air. The times permitted at 10 fibers longer than 5 micrometers per cubic centimeter can be obtained from the attached graph. Times permitted at fiber counts between 5 and 10 fibers (including 10 fibers) can be worked out with the C /T formula using the 5 fibers standard as the 8-hour time-weighted averagei C 1 Nonserious Violation: Not applicable. De Minimus Violation: Not applicable. C n1 'n 2 of 2 SGP 0006493