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I <br /> .. I <br /> 3.0 Sampling Collection Method and Equipment <br /> i <br /> 3.1 Sampling Method <br /> i <br /> The sampling method for asbestos in ambient air is National Institute.for Occupational Safety <br /> and Health (NIOSH) Method 7402, Asbestos by Transmission Electron Microscopy (TEM), <br /> NIOSH Manual of Analytical Methods, Fourth Edition, 2004. A copy of the method has been <br /> included in Appendix A. The samples will be collected over a nominal 8-hour period. <br /> I <br /> The asbestos air sampling procedure consists of drawing a known tow volume of air through a <br /> mixed cellulose ester (MCE) filter. The filter is then sent to the laboratory for analysis. Shaw <br /> has selected Asbestos TEM Laboratories, Inc. (ATEM) as the laboratory for analysis under this <br /> project. ATEM is an accredited analytical laboratory for TEM analysis. See Appendix C for <br /> ATEM's Certificate of Accreditation. NIOSH Method 7402 (direct method) will be used for <br /> detennining the concentrations of asbestos in air. <br /> I <br /> 3.2 Sampling Equipment <br /> The following table presents the monitoring equipment that will be installed at each station. <br /> Description of Proposed Equipment <br /> Equipment/instrument Manufacturer Specification <br /> Sampling Pump Gillian Thomas Pump Diaphragm Type <br /> Asbestos Filter MCE Filter Pore size 0.45 pm, with <br /> Cartridge TEM filter cassette <br /> Nm=micrometer <br /> i <br /> I <br /> The sampling equipment consists of a sampling pump, filter cassette connecting tubing, and a <br /> rotameter_ The filter will be a three-piece cassette 25 millimeters in diameter, with conductive <br /> extension cowls. The cassette will be loaded with an MCE filter of 0.45 pm pore size. The filter <br /> will be backed by a 5 µm pore size MCE filter. A sample rate of 1 to 4 liters per minute for a <br /> duration of 8 hours will be maintained. <br /> i <br /> I <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 a calibrator, <br /> with a representative filter cassette (from the same cassette lot as the sample cassettes). Three <br /> �xu „e,a+F«�,t� ��totia�gac <br /> 9.6.05 3-1 <br />