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12 July 2022 <br />Project No. 14-3009 <br />Page 3 of 3 <br /> <br />penetrometer to the desired depth. Soil parameters such as cone bearing, sleeve friction <br />and pore water pressure will be measured as the cone penetrometer is advanced. <br /> <br /> <br />3.2. CPT GROUNDWATER SAMPLING <br /> <br />At each location, paired soil borings will be advanced for groundwater sample collection. <br />Grab groundwater samples will be collected using a Hydropunch sample tool that will be <br />pushed into specified zones, then withdrawn approximately five to ten feet to expose an <br />inlet screen. The interior of the sampling tool fills with water and a 1-inch outer diameter <br />stainless steel bailer will be lowered and utilized to extract a groundwater sample. <br />Following sample collection, samples will be transferred into four volatile organic analysis <br />(VOAs) vials; all samples will be properly labeled and placed in a chilled container to be <br />transported under chain of custody to an ELAP-certified laboratory for analysis of <br />constituents listed in Section 2.2. <br /> <br /> <br />3.3. EQUIPMENT DECONTAMINATION <br /> <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 <br />55-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 /> <br /> <br />3.4. BORING ABANDONMENT <br /> <br />Following borehole advancement, Portland cement (grout mix) will be utilized to backfill <br />each borehole utilizing a tremie pipe. The SJCEHD will be given the opportunity to inspect <br />the grout mix prior to backfilling activities.