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11 2�stallation of_Off-Site Monitoring Wells and Sensitive Receptor Survey <br />' On January 14, 2002, Ramage Environmental published Status Report, Additional Site <br /> Investigation, which documented the installation of four off-site groundwater table monitoring wells <br />' and the survey of potential sensitive receptors within 2,000 feet of the site The locations of the <br /> four wells (MW-4, MW-5, MW-6 and MW-7) are shown on Figure 3 The well construction details <br />' are summarized in Table 1 <br /> All of the soil and groundwater samples collected from the four new wells were free of detectable <br /> concentrations of gasoline compounds As such, the lateral extents of impacted soil and <br /> groundwater at the water table appeared to be defined Impacts to vadose zone soil appeared to <br /> be limited to the footprint of the former UST system <br /> On-site, the groundwater samples collected from MW-2 and MW-3 continued to contain <br /> concentrations of TPH-as-gasoline, BTEX and 1,2-DCA MTBE was not detected in groundwater <br /> beneath the site The expanded groundwater monitoring well network indicated that groundwater <br />' flow may be toward the east-southeast The plume of impacted groundwater at the water table <br /> appeared to extend from the vicinity of the former UST system to the southeast beneath the East <br /> Charter Way right-of-way <br /> No sensitive receptors located within the site vicinity appeared to be threatened by the gasoline <br />' hydrocarbons in soil and groundwater, originating from the former UST system at the site For the <br /> site vicinity, one well completion report was on file at DWR Three additional well completion <br /> reports were identified immediately outside of the 2,000-foot site vicinity radius <br />' The nearest identified water supply well (approximately 800 feet west of the site) was the <br /> California Water Service Company Well#50, which has been out of service for several years, but <br /> remains open for potential future use The nearest identified active water well was the San <br /> Joaquin County Fairgrounds well, approximately 2,100 feet southeast of the site No schools, <br />' hospitals, day care centers or other possible sensitive receptors were observed in the site vicinity <br /> The nearest surface water body to the site is the Mormon Slough, which crosses the site vicinity <br />' approximately 1,000 feet north of the site <br /> 1 <br /> 6 <br />