Document rpRwMjBo1dv3Qpq34OQj5q5gr

OSHA SAMPLING DATA SHEET NO. 2 Substance: Asbestos. Standard: 29 CFR 1910. 93a(a) of December 7, 1971 8-hour time-weighted average*: 5.fibers per milliliter greater than 5 microns in length. . ..Excursion limit? 10 fibers per milliliter, up to 15-minutes in an hour for up.to 5 hours per 8-hour day. ^Unprotected or improperly protected worker exposures 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 AA filter (37mm, 0.8^ pore size. ) Face cap is removed and filter used open face during sampling. Sampling rate: 2 l/m. Sample Size: Minimum period of 15 minutes for evaluation of excursion 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/ml) may require short sampling periods of only 5 minutes, or less. Blanks: With each batch of samples submit two filters which are subjected to exactly the same handling as for the samples except that no air is drawn through them. Label these as blanks. Page 1 of 2 f OSHA SAMPLING DATA SHEET NO. 2 \ 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. Serious Violation: , 5. 1 or more-fibers per ml, greater than 5 m, in length, for an unprotected or improperly protected worker, for an 8-hour time-weighted average, except for certain proven excursions as noted in the emergency standard, which may raise the 8-hour time-weighted average to 5. 8 fibers per ml, Nonserious Violation: Not applicable Pe Minimis Violation: Not applicable, '" '. i Page 2 of 2 [_BB 0002850 )