Document LK24K0mXwdxJN5E99mwXq2a4z

OSHA SAMPLING DATA SHEET #2 1/3/72 O'? ,,tcof^ -S---u--b--s--t-a--n--c-e--:- \1 Asbestos. Standard: 29 CFR 1910.93a(a) of'De^ber 7, 1971 8-hour time-weighted average*: 5 fibers' per milliliter greater ithan 5 micrens 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 protectqj^vqr-cer exposures *. . Uri ; 11, ` . --- - - -Analytical -M-e-t-ho-d-: NOi C ... ....l .* T T" j i i o r iLt5 Fibers counted at 400-450 magnification, using phase contrast illumination, with sample mounted'in hig l-viscosity s olution of membrane filter material. Sampling Equipment: Personal sanpli.ng pump plus Millipore type AA filter (37mn, 0.8 y pore size). Face cap is removed and filter used open. / face during sampling. Sampling rate; ?. 1/m* Sample Size: : * Minimum period of 15 minute;; for evaluation of ex rum? on limit. Several samples of up to 4 hours for 'valuation of 8-hour average. Samples with a visible deposit may be too heavy to count. Compare, with a clean filter. Ho ivy concentrations of visible dust in the air (100 to 500'fibers/ml) may require short sampling periods of only 5 minutes, or less. b-1 cabs: With each bstch of samples submit rwo ii .rers which are subjected to exactly the same handling as for the samples except' that r.c air is dr avia through them, babe? these .e LlcnUr.. I'bb'BS-- 1. OSHA SAMPLING DATA SHEET 1)1 1/3/72 Shippin The cassette:; in which the samples, are collected should be shipped in a suitable- contained, designed to prevent damage in transit. Imminent Danger situations: \ Serious Violatioi: ,5.1 or more fibers per ml, greater than 5 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, vzhich may raise the 8-hour time-weighted average to 5.8 fibers per ml. Nonserious Violation: Not applicatle. De Minimis Violf tion: Hot applicable. I BB 0024655 1