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WESTERN 1356 EAST SEAMER STREET <br /> tia <br /> GEG-ENGINEERS w°°�LaNn'CA 98-53003 <br /> (530) 668-5300 <br /> CALIF.CONTRACTOR#513857 FAX(530)652-0273 <br /> REGISTERFI)GEOLOGISTS wege@cal.net <br /> Mr. Michael J. Infurna Jr. September 4, 2003 <br /> Senior REHS <br /> Leaking Underground Fuel Storage Tank Program <br /> San Joaquin County Public Health <br /> Environmental Health Division(PHS-EHD) <br /> 304 East Weber Ave., Third Floor <br /> Stockton, CA. 95202 <br /> (209)468-3454 <br /> RE: Workplan for 1876 Country Club Blvd., Stockton, CA: to install a 4 inch diameter well within <br /> the excavated/backfill area; to install two A zone and two B zone wells in the northern extent and <br /> down gradient (P9) area for obtaining repeatable groundwater samples to evaluate the progress of <br /> remediation efforts; to upgrade the groundwater treatment system from a temporary system to a <br /> continuous pumping and treatment system. <br /> Dear Mr. Infuma: <br /> INTRODUCTION <br /> The following Workplan is in response to the August 20, 2003 directive issued by Environmental <br /> Health Department San Joaquin County, see Appendix A. The directive is in response to <br /> recommendations offered in the Western Geo-Engineers, April - June 2003 Groundwater <br /> Monitoring Report, dated June 26, 2003. A groundwater recovery/treatment system was <br /> recommended, based on observations that the groundwater entering the excavation contained <br /> petroleum sheen. Also, two additional cluster well sets were recommended for monitoring <br /> purposes to document the effects of remediation of the site. Cluster well set 8A and 8B will be <br /> installed north of the excavated area to document the northern extent of the petroleum plume and <br /> cluster well set 9A and 9B will be installed down gradient, west of probe sample point P9, to <br /> document the downgradient extent of the petroleum plume. <br /> SITE LOCATION AND DESCRIPTION <br /> The site address is 1876 Country Club Blvd., Stockton, CA. It is located at the southeast corner of <br /> the intersection of Mission Street and Country Club Blvd. (Figure 1). The property is located in <br /> projected Section 4; TIN; R6E of the MDB&M at approximately five feet above mean sea level. <br /> The north corner of the property at Country Club Blvd and Mission Road is at N370 58.044' <br /> Latitude and W1210 19.393' Longitude (Delorme sa 7.0). On May 1, 2001 Land Surveyors <br /> Kjeldsen, Sinnock & Neudeck, Inc. surveyed the positions, top of casing and surface elevations of <br /> 2 Sanchez WORKPLAN 9-03 <br />