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10 June 2019 Advanced, <br /> AGE Project No. 19-4705 E n v i ro n m e n t o I <br /> Page 6 of 6 <br /> The soil-vapor samples will be transported under chain-of-custody procedures to a <br /> CELAP-certified laboratory and analyzed for VOCs and IPA (tracer gas) in accordance <br /> with EPA Method TO-15. <br /> After collection of the sample, soil-vapor from the polyethylene tubing will be monitored <br /> for the presence of volatile organics using an organic vapor meter equipped with a PID. <br /> 3.4. EQUIPMENT DECONTAMINATION <br /> All non-disposable sampling equipment will be triple-rinsed in a solution of Alconox prior <br /> to advancement of each boring. Rinseate generated during drilling activities will be <br /> containerized in properly labeled Department of Transportation (DOT)-approved 55- <br /> gallon drums and stored on-site in an area lacking public access. Disposal alternatives <br /> will be evaluated at a later date based on laboratory results. <br /> 3.5. BORING ABANDONMENTS <br /> Following borehole advancements, Portland cement (grout mix) will be utilized to <br /> backfill each borehole utilizing a tremie pipe. The SJCEHD will be given the opportunity <br /> to inspect the grout mix prior to backfilling activities. <br />