COMPLIANCE INFO_2023 ARCADIS REPORT

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TGI — Indoor Air, Ambient Air, Sub-Slab Vapor, and Soil Vapor 04ARCADIS Sampling for Analysis via USEPA Compendium Method TO-10A Rev: 0 1 Rev Date: March 10, 2023 high-volume method for the collection of PCBs and pesticides in air via USEPA Method TO-4A which is not described in this TGI. The low volume Method TO-10A is generally used for ambient air(outdoor)sampling concurrently with indoor air sampling. Typically, one outdoor ambient air sampler is placed upwind of the building(s)sampled. More than one ambient air sample may be necessary when multiple buildings are sampled concurrently. Typically, one indoor air sampler is placed in each major section of the building, i.e., basement, first floor, office, warehouse, etc. When selecting a method for a project, detection limits should be evaluated to ensure they are appropriate for comparison to selected screening levels. Method TO-10A can also be used for the collection of sub-slab vapor and soil vapor samples with a modified fitting to the PUF sorbent cartridge. Indoor air, ambient air, sub-slab vapor, and soil vapor sample collection via Method TO-10A are described in this TGI. 4 Personnel Qualifications Arcadis field sampling personnel will have current health and safety training, including 40-hour HAZWOPER training, site supervisor training, site-specific training, first aid, and cardiopulmonary resuscitation (CPR), as needed. Arcadis field sampling personnel will be competent in the relevant procedures and possess the required skills and experience necessary to successfully collect indoor air, ambient air, sub-slab vapor, and soil vapor samples and the desired field work. Arcadis personnel responsible for directing indoor air, ambient air, sub-slab vapor, and soil vapor sample collection activities must have previous sampling experience with these media and be able to complete the field work without direct supervision. It is highly recommended that field sampling personnel read the USEPA Method TO-10A sampling guidance document prior to ordering media and equipment, and before completing sampling (Attachment A). 5 Equipment List Prior to completing the sampling event, contact the laboratory to determine the PUF sorbent cartridge, quartz fiber filter, and sample volume to achieve project objectives. An additional fitting is required from the lab for sub-slab vapor, and soil vapor sampling. The equipment required for indoor air, ambient air, sub- slab vapor, and soil vapor sample collection is presented below: Indoor Air and Ambient Air Low Volume Sampling • Low volume pump capable of a sampling flow rate of 1-5 liters per minute (L/min) such as a GilAir-5 Sampling Pump (or equivalent). Request one pump for each sampling location, plus duplicate pumps per project- specific requirements. • DryCal Defender 510 Flow Calibrator(or equivalent)for calibrating sampling pump flow rates. • Method TO-10A sorbent cartridge with PUF. Request one sorbent cartridge from the laboratory for each sampling location, plus one calibration sorbent cartridge, one blank sorbent cartridge, and duplicate sorbent cartridges per project-specific requirements. • A quartz fiber filter may be used in conjunction with the PUF cartridge but is not necessary. When using the quartz fiber filter, a filter cartridge assembly is required. Request one from the laboratory for each sampling location. Printed copies of this Technical Guidance Instruction are uncontrolled. Page 5 of 14