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Ground Water Monitoring Well Installation Report - <br /> • 3rdQ uarter 2000 <br /> CALIFORNIA FUELS CARDLOCK STATION <br /> 2402 Pacific Avenue, Stockton, California <br /> 1.0. INTRODUCTION <br /> IAdvanced GeoEnvironmental,Inc (AGE)has prepared this report documenting well installation and <br /> soil sampling activities at 2402 Pacific Avenue (site), Stockton, California The location of the site <br /> is illustrated in Figure 1, general features at the site are illustrated in Figure 2 <br /> The scope of work of this investigation included installation of one ground water monitoring well <br /> with the objective of assessing the vertical impact of petroleum hydrocarbons to soil and ground <br /> water This report is prepared in accordance with guidelines established by the San Joaquin County <br /> Public Health Services -Environmental Health Division(PHS-EHD) and by the California Regional <br /> Water Quality Control Board - Central Valley Division(RWQCB) for investigation of underground <br /> storage tank (UST) sites Background information is summarized in the Corrective Action Plan, <br /> dated 27 September 1999 and prepared by AGE <br /> 2.0. PROCEDURES <br /> In August 2000,monitoring well MW-13 was installed on-site, soil sampling was performed at five- <br /> foot intervals during drilling activities Ground water monitoring well installation procedures for the <br /> site were outlined in Work Plan Addendum -May 2000, dated 16 May 2000, prepared by AGE and <br /> approved by the PHS-EHD by letter dated 18 May 2000 <br /> I <br /> 21 DRILLING AND SAMPLING <br /> On 25 August 2000, one soil bonng/momtoring well (MW-13) was advanced on-site as part of site <br /> assessment activities related to the former USTs at the site Soil boring MW-13 was advanced <br />' vertically to a depth of 100 feet below surface grade (bsg) The soil boring was advanced utilizing <br /> a B-85 truck-mounted drill rig equipped with 10-inch diameter hollow-stem augers Soil cuttings <br /> were stockpiled on and covered by plastic sheeting at the site, the soil bonng/momtonng well <br /> location is depicted in Figure 2 <br />' 22 SOIL SAMPLE COLLECTION <br /> Discrete soil samples were collected at 5-foot intervals beginning at 10 feet bsg from the soil boring <br /> Soil samples were collected utilizing a California modified split-spoon sampler loaded with 2-inch <br /> by 6-inch brass sleeves The sampler was driven by dropping a 140-pound weight from a height of <br /> Advanced GeoEnvironmentai,Inc <br />