COMPLIANCE INFO_2023 ARCADIS REPORT

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Pesticides/PCBs Method TO-10A [Note: If commercially pre-extracted PUF plugs are used, extraction with acetone is not required.] Follow with a 16-hour Soxhlet extraction with 5%diethyl ether in n-hexane. When cartridges are reused, 5% diethyl ether in n-hexane can be used as the cleanup solvent. 9.3 Place the extracted PUF in a vacuum oven connected to a water aspirator and dry at room temperature for 2 to 4 hours(until no solvent odor is detected). Alternatively,they may be dried at room temperature in an air- tight container with circulating nitrogen(zero grade). Place the clean PUF plug into a labeled glass sampling cartridges using gloves and forceps. Wrap the cartridges with hexane-rinsed aluminum foil and placed in jars fitted with TFE fluorocarbon-lined caps. The foil wrapping may also be marked for identification using a blunt probe. 9.4 Granular sorbents may be combined with PUF to extend the range of use to compounds with saturation vapor pressures greater than 10-4 kPa(6). A useful combination trap can be assembled by "sandwiching" 0.6 g of Tenax-TA between two 22-mm I.D. x 3.8-cm pre-cleaned PUF plugs,as shown in Figure 2,Cartridge b. The Tenax-TA should be pre-extracted as described in Section 9.2. This trap may be extracted,vacuum dried,and removed without unloading it. 9.5 Analyze at least one assembled cartridge from each batch as a laboratory blank before the batch is acceptable. A blank level of<10 ng/plug for single component compounds is considered to be acceptable. For multiple component mixtures(e.g.,PCBs),the blank level should be<100 ng/plug. 9.6 After cleaning,cartridges are considered clean up to 30 days when stored in sealed containers. Certified clean cartridges do not need to be chilled when shipping to the field. 10. Sampling [Note: After the sampling system has been assembled and calibrated as per Section 81 it can be used to collect air samples as described below. The prepared sample cartridges should be used within 30 days of certification and should be handled only with latex or precleaned cotton gloves.] 10.1 Carefully remove the clean sample cartridge from the aluminum foil wrapping(the foil is returned to jars for later use)and attached to the pump with flexible tubing. The sampling assembly is positioned with the intake downward or in horizontal position. Locate the sampler in an unobstructed area at least 30 meters from any obstacle to air flow. The PUF or PUF/XAD-2 cartridge intake is positioned 1 to 2 in above ground level. Cartridge height above ground is recorded on the Compendium Method TO-l0A field test data sheet(FTDS), as illustrated in Figure 5. 10.2 After the PUF cartridge is correctly inserted and positioned,the power switch is turned on and the sampling begins. The elapsed time meter is activated and the start time is recorded. The pumps are checked during the sampling process and any abnormal conditions discovered are recorded on the FTDS. Ambient temperatures and barometric pressures are measured and recorded periodically during the sampling procedure on the FTDS. 10.3 At the end of the desired sampling period,the power is turned off,the PUF cartridge removed from the sampler and wrapped with the original aluminum foil and placed in a sealed,labeled container for transport,under blue ice(<4°C),back to the laboratory. At least one field blank is returned to the laboratory with each group of January 1999 Compendium of MethodsJor Toxic Organic Air Pollutants Page 10A-7