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Extended Plume Definition.-7500 W 11th St.,Tracy,CA. Page 11 <br /> .. 6.0 WATER QUALITY IN POTABLE WATER SUPPLY WELLS <br /> As was requested by the SJCEHD (San Joaquin County Public Health Services, 1999b), the <br /> +- first phase of site characterization conducted at the Navarra Site that was conducted in April <br /> and May 2000 included a search for drinking water, agricultural and industrial wells within a <br /> 2,000-ft. radius of the site (The San Joaquin Company Inc. 2001g). <br /> In a letter dated October 26, 2001, the SJCEHD requested an additional search for <br /> residential, industrial and commercial wells, including a compilation of all available data <br /> 'e regarding well construction details and other information about each of the wells identified in <br /> the area (San Joaquin County Public Health Services 2001 a). However, the USTCF refused <br /> to fund that open-ended search for well information. Instead, they restricted the search for, <br /> '"` and preparation of, a compilation of available data regarding the construction details and use <br /> of those wells in which the groundwater may be at least at some risk of being affected by the <br /> release of hydrocarbon fuels at 7500 West Eleventh Street. <br /> Available information about the wells found in the area of the 7500 West Eleventh Street site <br /> is shown in Table 6. The locations of the wells that remain extant in the immediate area are <br /> shown on Figure 2. <br /> 6.1 Monitoring of Potable Water Quality <br /> After additional discussion with SJCEHD staff, it was agreed that the wells on the following <br /> properties should be monitored for the presence of fuel hydrocarbons. <br /> 7500 West Eleventh Street <br /> 24195 South Chrisman Road <br /> 7601 West Eleventh Street <br /> 23901 South Chrisman Road <br /> ,r 23950 South Chrisman Road <br /> Carmelo Business Park <br /> �,. As specified in the approved work plan (The San Joaquin Company Inc. 2003a), a <br /> monitoring program for the potable water-supply wells listed above was initiated on April 1, <br /> 2004. Three additional monitoring rounds, conducted at quarterly intervals, are planned. <br /> 6.1.1 Well Head Inspection,_Repair and Installation of Sampling Ports <br /> After obtaining the authorizations of the well owners, each well was inspected by SJC's State <br /> + of California DHS-certified Water Distribution Operator to determine whether the well pump <br /> and headwork system was in good mechanical repair and that sampling ports were present <br /> •- that complied with San Joaquin County community water supply regulations. <br /> In the case of the well at 7500 West Eleventh Street, which was, at that time, rehabilitated <br /> following a fire that gutted the Casa Mendoza restaurant, SJC's inspection found that a <br /> sampling port had been included in the new head works, but that it was improperly located. <br /> sic <br />