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I . Monitoring and Extraction Well Installation Report HERMAN & HELEN'S MARINA ' 15135 Eight Mlle Road, Stockton, California ' 1.0. INTRODUCTION At the request of Mr Andrew Smith of Herman and Helen's Marina,Advanced GeoEnvironmental, ' Inc (AGE) has prepared this well installation report for the property located at 15135 Eight Mile Road, Stockton, California (site) The site and the surrounding,area are illustrated on Figure 1 ' Structures, boring and well locations are illustrated on Figure 2 Background information is summarized Appendix A Soil and ground water analytical data from the current and previous investigations can be found in Tables 1 through 5 I 2.0. PROCEDURES ' Six ground water monitoring wells (MW5 through MW10) and one extraction well (EW1) were - installed and developed in October 2002 Field work was performed in accordance with guidelines ' issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for the investigation of underground storage tanks (UST) sites lie 2 1 DRILLING AND SAMPLING ' On 07 through 09 October 2002, seven soil borings were advanced at the site The soil borings were advanced using a CME-75HT drill rig, utilizing 8 25-inch diameter hollow-stem augers to advance borings MW5 through MW10 and 15-inch diameter hollow-stem augers to advance boring EW 1 ' The drill rig and two-man crew were supplied by West Haz-Mat Drilling Corporation Auger returns generated by drilling were containerized in properly labeled DOT-approved model 17H 55-gallon ' drums and was stored on-site Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler ' loaded with three pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected from monitoring well pilot borings MW5 through MW8 and MW10 at five-foot intervals, beginning at 5 feet below surface grade (bsg), using a 140-pound hammer to advance the sampler The number ' of blows required to advance the sampler over each 6-inch increment of the 1$-inch sampling interval was recorded on the boring logs Sampling equipment was washed in an Alconox solution and rinsed with water prior to each sampling run to minimize cross-contamination ' For each sample,both ends of the second or other selected sleeve were covered with Teflon sheets, capped and sealed with tape The samples were labeled,stored on ice and transported under chain-of- custody to Cal Tech Laboratories(CTL),a State of California Department of Health Services(DHS)- certified analytical laboratory ' Advanced GeoEnvi ron mental,Inc I ,