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VOSoil Vapor Sampling SOP Page 10 of 11 <br /> Stantec Rev. 1.0 Apr 2019 <br /> • A duplicate sample will be collected using a laboratory-supplied dual collection manifold. <br /> • Sample collection and tracer gas monitoring data for each probe will be recorded on the <br /> soil vapor sample collection data log. <br /> 8.5 Sample Storage and Transport <br /> Soil vapor samples will be properly labeled and placed within secure packaging received from <br /> the laboratory. Soil vapor samples will not be chilled since contaminants may condense in the <br /> canisters at low temperatures. Soil vapor samples will be shipped via next-day air. Samples <br /> will be transported under chain-of-custody protocol (including noting the final canister vacuums <br /> and serial numbers of the canisters and flow controllers). Pre-field planning will prevent sample <br /> shipments from arriving at the laboratory during weekends. <br /> 9.0 DECONTAMINATION <br /> Re-use of soil vapor sampling equipment is not allowed. <br /> 10.0 QUALITY CONTROL CHECKS AND ACCEPTANCE CRITERIA <br /> Refer to the Quality Assurance Project Plan for specific quality control checks and <br /> acceptance criteria. <br /> Outline quality control checking procedures, including frequency requirements and <br /> acceptance criteria. Acceptance criteria may take the form of an illustration such as a <br /> chart of acceptable results with tolerances, or other appropriate forms. <br /> 11.0 DOCUMENTATION <br /> A record will be maintained during the sampling procedure that will contain at a <br /> minimum: <br /> • Sample identification, <br /> • Sample depth, <br /> • Weather conditions, <br /> • Sampler name, <br /> • Volume of air purged removed, <br /> • Purging method, <br /> • Start and end vacuum readings, <br /> • Helium measurements in shroud at start, every 5 minutes and/or end of <br /> sampling, <br /> THIS INFORMATION FOR AUTHORIZED COMPANY USE ONLY <br /> STANTEC CONSULTING <br />