Document bBkXMm1OR6zYd7QE5dZRrxROo

PLAINTIFF'S EXHIBIT Teratology Used In OSHA Safety and Health Standards (29 CFR 1910) PenUtte Exposure limit * 8-Hiiir Tins term is xynanymous with the 8-bcur time weighted average exposure EmiL It represents the mwinnim S-hau average espouse ccncentratiat which may occur in any 8-hcur wade shift cf a 40 hour weak week. Action Lr* An S-hour time weightu avenge coaxiitiation cf a contaminant in air (usually equal to 1/2 the PEL) at wtsdi some provision cf tibe standard apply. Medical mmftoring is required fa sane 71m i"|iw Mitww iiii'n'mitfattm* ** to be dnring toy 8*hcur oak iwn a brirf poiod (usually 5*10 minutes). Acceptable peak coaceguatlcm are yedflod for only 21 cnmpnuih. GSHA EXPOSURE LIMITS FOR POIENT1AL SYSTEM AIR CONTAMINANTS 8>Hour Ceiling Peak 8-Hocr PEL Attica Led Cocccntatim Cmcentntian Asbetfcn 2 tfoa/an1 0J Ass/ Lead SB ptfa? 30 ygfnf Bourne 30mg/m* (10 ppm) lOfins/cmP gO du/|U> (2SppaO ]ffl qjb/qif (50 ppm) LLA 002007 Calculation: Asbestos Concentration (fibers/an5) Sample problem Calculation of asbestos concentration (fibers/as?) from sampling and analytical data Example A was collected fix 15 rninuta at a Sow rate cf 2D Liters/minute. Optics) eaminadcn cf the filter revealed 18 fibers in 100 mkrcacopic fidds d 0D1 mrf/Add. The total area <f the filter was 8S5 mm?. 1) Calculate wahnne cf air mied (in cm?) remember. 1 Liter - 1/WO orf Vfahne Air flow rate x time ^xllnia -30L -30. x 1000 erf L -3QjOOOcrf 2) TVi--iirw the d fifaoa on total filter sample (mot Umtcrics wiD give remits directly in toms d fibexs/fiita) __ ;[ 1 field x 8S5 mrf lOQ Ba&b OjQI mrf filer -15590 3) Calm!ale asbestos fiber uanenlialion (fibas/arf) 15390 film 30/100 erf ~05fimtrf .9. LLA 002008