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WJNGEI6 p6pp60�91TM'IS <br /> Petroleum hydrocarbons were detected in soil to a depth of 31 ft but were not detected in <br /> groundwater. <br /> In December 1991 a quarterly groundwater sampling program was begun at the facility. At the <br /> beginning of the quarterly groundwater sampling program only well MW-1 contained enough <br /> water to sample. Therefore, another well (MW-4) was installed Groundwater samples were <br /> collected through January 1993 Petroleum hydrocarbons were not detected in groundwater <br /> during the sampling program. <br /> In July 1994 an additional soil and groundwater investigation was conducted. Soil samples were <br /> collected from three borings, grab groundwater samples were collected from two of the borings, <br />' and wells MW-2 and MW-3 were abandoned. Petroleum hydrocarbons were detected in soil to <br /> a depth of 50 feet below ground surface (bgs). Petroleum hydrocarbons were not detected in <br /> groundwater; however, a groundwater sample was not collected from the boring (SB-2) with the <br /> highest concentrations of petroleum hydrocarbons in soil. <br /> In October 1996 an investigation was conducted to determine groundwater quality in the vicinity <br /> of boring SB-2 Monitor well MW-5 was installed and soil samples were collected from the <br /> well borehole Soil contamination was detected to a depth of 30 feet bgs. Two rounds of <br /> groundwater samples were collected in November and December 1996 Petroleum hydrocarbons <br /> were not detected in groundwater. <br /> 3.0 EXISTING FEATURES <br /> 3.1 AREA PRODUCTION WELLS <br />' Only one production well was found within 2,000 feet of the site (Figure 1). The well is located <br /> approximately 1,560 feet south-southwest of the site The well, designated 1-R, is owned and <br /> operated by the City of Lodi and supplies drinking water The well is screened from 150 feet <br /> to 395 feet bgs The United States Geological Survey 7 5 minute Lodi North quadrangle <br /> topographic map shows four additional wells within 2,000 feet However, during a site <br /> reconnaissance the wells were not found The topographic map shows the wells located in <br /> orchards which have been removed and commercially developed since the publication of the <br /> map <br /> • <br />' L"01ECTSZAN10Q%CL0SUMMVC_L0DCLO 2 1 May 1997 <br />