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I <br /> Monitoring Well Installation and Quarterly Report - Second Quarter 2001 <br /> MANTECA CITY CORPORATION YARD <br />' 210 East Wetmore Street, Manteca, California <br />' <br /> 10. INTRODUCTION <br /> At the request of Mr Frederic Clark of the City of Manteca, Advanced GeoEnvironmental, Inc <br /> (AGE) has prepared this monitoring well installation and quarterly report for the property located <br /> I at 210 E Wetmore Street, Manteca, California The site and the surrounding area are illustrated on <br /> Figure 1 Structures,boring and well locations are illustrated on Figure 2 Background information <br /> is summarized in the Monitoring Well Installation Work Plan, dated 25 January 2001 and prepared <br />' by AGE <br /> I2.0. PROCEDURES <br /> Four ground water monitoring wells (MW 1 through MW4)were installed, developed and sampled <br /> in April 2001 Field work was performed in accordance with California Regional Water Quality <br /> Control Board - Central Valley Region (CRWQCB -CVR) and San Joaquin County Public Health <br /> Services - Environmental Health Division (PHS-EHD) guidelines and approved Monitoring Well <br /> IInstallation Work Plan, dated 25 January 2001 <br /> 21 DRILLING AND SAMPLING <br /> On 05 April 2001, four pilot soil borings were advanced at the site The soil borings were advanced <br /> using a CME-75 high torque drill ng, equipped with 8 25-inch diameter hollow-stem augers to <br /> advance pilot bonngs MW 1 through MW4 The drill rig and three-man crew were supplied by <br /> I Mitchell Drilling Environmental Auger returns generated by drilling were stored on-site on visqueen <br /> plastic, pending laboratory analysis <br />' Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler <br /> loaded with three pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected from <br /> monitoring well pilot borings MW 1 through MW4 at five-foot intervals,beginning at 5 feet below <br />' surface grade (bsg) using a 140-pound hammer to advance the sampler The number of blows <br /> required to advance the sampler over each 6-inch increment of the 18-inch sampling interval was <br /> recorded on the boring logs Sampling equipment was washed in an Alconox solution and rinsed <br /> with water prior to each sampling run to minimize cross-contamination <br /> For each sample,both ends of the leading or other selected sleeve were covered with Teflon sheets, <br /> capped and sealed with tape The samples were labeled,stored on ice and transported under chain-of- <br /> custody to McCampbell Analytical,Inc (MAI),a State of California Department of Health Services <br /> . (DHS)-certified analytical laboratory <br /> Advanced GeoEnvironmenta[,Inc <br /> I <br />