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TGI — Indoor Air, Ambient Air, Sub-Slab Vapor, and Soil Vapor 04ARCADIS <br /> Sampling for Analysis via USEPA Compendium Method TO-10A <br /> Rev: 0 1 Rev Date: March 10, 2023 <br /> Calibration Procedure <br /> The DryCal Defender 510 (or equivalent)flow calibrator must be used to calibrate each sampling pump. One <br /> separate PUF cartridge is required and used only for calibration. <br /> 1. Connect the low volume air sampler to a power source (wall plug). An extension cord and GFCI may be <br /> necessary. The internal battery is inadequate for 24-hour sampling. <br /> 2. Connect the low volume air sampler inlet to the flow calibrator using flexible silicone tubing. <br /> 3. Connect the tapered end of the calibration sorbent tube to the opposite end of the flow calibrator using <br /> flexible silicone tubing. <br /> 4. Turn on the low volume air sampler. Use a small screwdriver to adjust the flow to the flow rate and project <br /> specific objectives. <br /> Setup Sampling Module <br /> Use clean gloved hands to setup the sampling module as follows: <br /> 1. Wear gloves whenever handling the PUF cartridges and quartz fiber filters. Open the re-sealable bag, and <br /> remove the bubble wrapped container. Remove the bubble wrap, open the container, and remove the <br /> bubble and foil wrapped cartridge (retain all packing material for return shipping to the laboratory). <br /> 2. Remove the calibration sorbent tube and replace with the sample sorbent tube. <br /> Indoor and Ambient Air Collection of the Sample <br /> 1. Turn on the low flow air sampler. Record the start time on the sample form. Ensure the low flow sampler <br /> is reading correctly according to the flow rate pre-determined by the laboratory and project team. <br /> 2. Record the following weather information on the sampling form (use a hand-held weather meter or other <br /> suitable information source [e.g., weatherunderground.com] to obtain the following information): <br /> o Ambient air temperature <br /> o Indoor air temperature <br /> o Barometric pressure <br /> o Wind speed <br /> o Relative humidity <br /> o Significant recent precipitation <br /> o Snow/ice cover <br /> 3. Check the low flow air sampler after approximately an hour of sample time to ensure the air flow <br /> rate is consistent. If not consistent, adjust air flow as needed. <br /> Printed copies of this Technical Guidance Instruction are uncontrolled. Page 9 of 14 <br />