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n; <br /> Task 5 <br /> JPCA will supervise the advancing of one boring to an a roximate <br /> depth of 80 ft. One 4 inch diameter extraction well will be <br /> constructed so as to extend at least twenty feet into the <br /> saturated zone. The soil samples will be analyzed to see if <br /> contamination is still present. <br /> JPCA will use a C-57 licensed driller and 8-inch diameter hollow- <br /> stem augers. Soil samples will be collected at each 5 ft level <br /> interval or at significant changes in lithology commencing at a <br /> depth of ten' feet, using a split spoon tube sampler loaded with <br /> pre-cleaned brass tubes. Soil samples collected in the lowest <br /> brass liner will be preserved by covering both ends with Teflon <br /> tape, capping with plastic caps and sealing the caps with plastic <br /> tape. soil samples will be labeled and logged under Chain-of- <br /> Custody (COC) control. Soil samples will be stored in a cooler <br /> with ice; ' t"ranspoited 'tb 'a- state certified laboratory -for <br /> analysis with COC documentation. A maximum of 16 soil samples is <br /> anticipated to be collected. <br /> Task 6 <br /> The borings will be logged by inspection of the samples and <br /> classified using the Unified Soil Classification System by a <br /> California Certified Engineering Geologist. <br /> Ii <br /> Task 7 <br /> One groundwater sample will be collected from each monitoring <br /> well, after the wells are purged and allowed to recharge. A <br /> clean dedicated bailer will be used to obtain the samples, then <br /> the samples will be placed in four 40 ml VOAs with Teflon septa <br /> and. a one liter glass sampling bottle, labeled, held in a cooled <br /> (4 Degrees C) ice chest and transported to a State Certified <br /> Laboratory, under COC documentation, for analyses. A maximum of <br /> 7 groundwater samples is anticipated to be collected. <br /> Sampling equipment will be decontaminated using tri-sodium <br /> phosphate solution (TSP) and twice rinsed with the last rinse <br /> using distilled water prior to sampling. Soil cuttings will be <br /> stored on and covered with visqueen. <br /> Task 8 <br /> The soil and groundwater samples collected will be analyzed for <br /> Total Petroleum Hydrocarbons as Diesel (TPHD) , Total Petroleum <br /> Hydrocarbons as Gasoline (TPHG) , Benzene, Toluene, Ethylbenzene <br /> and Xylene (BTEX) via EPA protocol 8015 Modified: Oxygenates via <br /> . EPA protocol 8260 at a California State Certified Laboratory. <br /> C, 3 <br /> i <br />