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May 2013 re <br /> associates,Inc. <br /> Project No. 1301-062119 «"�LOMTa <br /> — Drill Hole Locations. Manual hand clearing of each drill hole location will be performed to <br /> approximate depths of 5 to 6 feet prior to advancing drilling rod. <br /> Soil samples will be collected in continuous core acetate liners and visual inspected for <br /> signs of contamination. Based on a review of the State Water Resources Control Board <br /> (SWRCB) Geotracker website, groundwater in the vicinity of the Project Site is present at <br /> approximate depths of 50 feet and is not anticipated to be encountered during the course of the <br /> subject soil assessment activities. <br /> The proposed angle drill holes will be completed by advancing 1 or 2-inch diameter <br /> direct push drill rod using Geoprobe drilling technology. Undisturbed soil samples will be <br /> collected at each drill hole location in 4 to 5-foot continuous core acetate liners. In addition to <br /> soil samples collected for chemical analyses, soil from each sampled interval will be retained for <br /> field screening and lithologic logging purposes. Field screening will be completed using a hand- <br /> held photoionization detector(PID). Soil classification will be completed by a Padre geologist in <br /> accordance with the Unified Soil Classification System (USCS). The soil samples selected for <br /> chemical analyses will be sealed, labeled, and preserved on ice in the field. After completion of <br /> soil sampling activities, the samples will transferred to a State-certified analytical laboratory for <br /> chemical analyses. <br /> Upon completion, each drill hole will be abandoned in accordance with SJCEHD permit <br /> requirements. This will consist of introducing neat cement grout to a minimum depth of 3 feet <br /> bgs, and then filling with drill cuttings to grade surface. The surface penetrations will be <br /> patched to match the existing surface grade. <br /> 2.5 LABORATORY ANALYTICAL PROGRAM <br /> All collected soil samples will be delivered by Padre under chain-of-custody procedures <br /> to a State of California-certified laboratory for chemical analyses. The laboratory analytical <br /> program includes analyses of 7 soil samples for the presence of the following constituents: <br /> • TPHd by U.S. EPA method 8015M; and <br /> • BTEX and MTBE by U.S. EPA method 8260B. <br /> The soil samples will be submitted to the analytical laboratory for chemical analyses on a <br /> requested 5-day turn-around-time (TAT). <br /> 3.0 REPORT PREPARATION <br /> Following receipt and review of the analytical data, Padre will prepare a letter-report <br /> documenting the subject soil assessment activities. The report will document the soil <br /> assessment methodology; site conditions encountered; field procedures utilized; and will <br /> summarize the analytical results. The report will also identify, to the fullest extent possible, the <br /> approximate volume of impacted soil, if encountered. The report will contain all appropriate <br /> figures, and tabular data, and contain our conclusions and recommendations, as appropriate. <br /> The report will be signed and certified by a State of California-licensed Professional Geologist. <br /> 13.0621 Kaiser Stockton TWP-HSP revised <br /> - - - - 3- <br />