Document re9908o3K2qmOXxgOOG9NR9Mq

S4T, p 3 + MEASUREMENT AND CONTROL s4r OF ASBESTOS DUST EXPOSURE Poo 5 t. SAMPLING 6.1 Monitoring. Sampling of ench oprrntinn mii.il be for nl Iruil 15 minute* duration nnd taken in a frequency and pattern lo ncrurnlely represent (he employee's ex posure ovrr hi.* work period. If results indicnlr ft level of mlieMo.* du.i in excccs* of (hr limit, the operation ihotild hr reviewed to reduce exposure, see 2.4, and resampled. The initial sampling program must determine the 8-hour time weighted average. Intervals between samples shall not exceed six (6) months. 6.2 Equipmont. Samples may be taken with a portable battery-operated o[r sampler attached to an employee'* \ belt or placed in the work area. I CAUTION: Samples may not be collected in hazardous areas, as defined in DEID, without a permit to use a spatk producing device. 6.3.2 Clip filler holder lo lapel or shirt porkei a:close ns possible lo the person's mouth. This method of personnel sampling is preferred. 6.3.3 If a sampler is affixed prrnmnrnlly in a work nren, suspend the filler n dose ns poswihlrtn thr perinn'* hrenthing zone at the job to be monitored. 6.3.4 Remove top section of the filter to expose thr full filter face. 6.3.5 Turn on pump and set at approximately two (2) liters per minute rate. Check rate periodically. When finished sampling, turn off pump and record , elnpsed sampling time. Sampling record forms. EN--2731 (see Figure 3) ore available from Stationery ' Stores, Eng Dept, Wilmington, Del. 6.3.6 Replace filler top after sample is collected and seal with tape prior lo shipment. I | | i ! 6.2.1 Pump 6.4 Analysis. Completed samples (exposed filters) arc j ' placed In a mailing tube, sealed, and sent to.a qualified } Micronaire or Model Cl IS Bendix Corp Environmental Science Division Towson, Md 21204 or laboratory with two copies of the sampling record. In- j elude an unexposed filter with the sample which has been j handled in the same fashion without drawing air through j j it. Qualified laboratory information is avnilable from j Haskell Laboratory. i Gravimetric or Monitaire Mine Safety Appliances Co 230 N. Braddock Ave Pittsburgh, Pennsylvania 15208 * j .j Either unit must include bauery chargerand battery; ' carrying case is optional. ' 6.2.2 Filler 1 Millipore No. MAWP-037-AO filler. ' while, nongridded, ~ 0.8 micron pore j Millipore Corporation Bedford, Massachusetts 01730 ; 6.3 Procedure 6.2.1 Flow through the pump should be calibrated, with the filter in line for each pump. 6.4.1 All determinations shall be made by the mem brane filter method at -i00--450X (magnification) (4mm objective) with phase contrast illumination. 6.5 Record Keeping. Records of personnel and environ- i menial monitoring shall be maintained for three (3) years J and made available upon the request of authorized repre-1 sentatives of OSHA and NIOSH (National institute ofj Occupational Safety and Health). | I 6.6 Wanting signs conforming to Figure 1 shall be I posted at all approaches to areas where asbestos concert-. trations may be above permissible exposure limits at a sufficient distance to permit an employee to read the signs . and take necessary precautions before entering the cren.' Caution labels conforming to Figure 2 shall be used to j j identify containers of raw materials, scrap, waste, ether products containing asbestos, and asbestos contaminated clothing. Portions printed tn rod meat OSHA rogulottons. Section 1910.93a. +l 0902934 DU* I