Laserfiche WebLink
3.0 Sampling Collection Method and Equipment <br /> 3.1 Sampling Method <br /> The sampling method for asbestos in ambient air is National Institute for Occupational Safety <br /> and Health (NIOSH) Method '1402, Asbestos by Transmission Electron Microscopy (TENI), <br /> NIOSH Manual of Analytical Methods, Fourth Edition, 2004. The samples will be collectecl <br /> over a nL)minal 8-hour period. <br /> The asbestos air sampling procedure consists of drawing a known low volume of air through a <br /> mixed cellulose ester (ALICE) filter. The filter is than sent to the laboratory for analysis. Shaw <br /> has selected Asbestos TEM Laboratories, Inc. (Al'EM) as the laboratory for analysis under this <br /> project. ATEM is an accredited analytical laboratory for TEM analysis. NIOSH Method 7402 <br /> (direct method)will be used for determining the concentrations of asbestos in air. <br /> 3,2 Sampling Equipment <br /> The fbIlowing table presents the rnonitonng,equipment that will be instalicd at each station. <br /> Description of Proposed Equipment <br /> Equipmentlinstrurnent Manufacturer specification <br /> Sampling Rarnp Gillian Thomas Pu, ,p_.I_ DiaphragmType <br /> Asbestos Filter INCE Filter Pore size 0-45 tarn, with <br /> Cartridge TEM filter cassette <br /> pm .-,mirror eter <br /> The sampling equipment consists of a sampling Pi"r')P7 filter cassette, connecting tubing, and a <br /> rotarrict--r. The filter will be a three-piece cassette 25 millimeters in diameter, with conductive <br /> extension cowls. 'Rie cassette will he loaded with an INICR filter ref O.45 ltin pore ---,Izc. The filter <br /> will be backed by a 5 p,rn pore size MCE filter, A sample rate of I to 4 liters, per nitrutc for a <br /> duration of 8 hours will be maintained. <br /> 3.3 Equipment Calibration <br /> The sampling pump will be calibrated immediately before and after each run. Preliminary <br /> calibration should be conducted using a primary calibrator-such as a soap bubble-type calibrator, <br /> with a representative filter cassette (from the same cassette lot as the sample cassettes). Three <br /> separate constant flow calibration readings will be obtained both before and after sampling. <br /> Should the flow rate change by more than 5 percent during the sampling period, the average kc,& <br /> the pre-and past-calibration rates will be used to calculate the total sample volume. <br /> 3-1 <br />