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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 /> Approval Signatures <br /> Prepared by: � � 3/10/2023 <br /> S <br /> Sarah Jonker Date <br /> Reviewed by: 3/10/2023 <br /> Robert Uppencamp Date <br /> Printed copies of this Technical Guidance Instruction are uncontrolled. Page 3 of 14 <br />