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ARCO sites <br /> Page 2 <br /> 1612 Hammer Dane, Stockton ARCO Facility # 548 <br /> PHS/EHD contact - Mary Meays <br /> ARCO owns this property and will continue to operate the <br /> underground storage tanks (UST' s) until the City of Stockton <br /> decides to widen the street or until the single wall tanks <br /> have to be removed in December 1998 . Prior to removing the <br /> UST' s, monitoring well MW##3 will be destroyed. After the <br /> UST' s have been removed, vapor extraction wells will be <br /> installed in the former tank area. <br /> Levels of contamination in the ground water samples from the <br /> monitoring wells are about the same as before the water level <br /> was above the top of the screened interval of the monitoring. <br /> well . Levels of contamination in the ground water samples <br /> collected from the vapor extraction wells are high. The vapor <br /> extraction wells were constructed with pea gravel . It was <br /> discussed that the results of the water samples from the vapor <br /> extraction wells are not reflective of ground water since the <br /> wells have not been developed or sufficiently purged. ARCO <br /> does not want to silt in these wells, so it was agreed to <br /> discontinue sampling of the vapor extraction wells . <br /> 225 Cherokee Lane, Lodi ARCO Facility #760 <br /> PHS/EHD contact - Linda Turkatte <br /> After PHS/RHD has received the closure report for this site, <br /> the Regional Water Quality Control Board (RWQCB) will be given <br /> 30 days to comment on its closure. <br /> 3212 California Street, Stockton ARCO Facility #2186 <br /> PHS/EHD contact - Steve Sasson <br /> The plume of ground water contamination at this site appears <br /> to be limited. The vapor well was sampled twice . Quarterly <br /> monitoring will continue . <br /> 1711 Yosemite, Manteca ARCO Facility #6020 <br /> PHS/EHD contact - Michael Infurna <br /> The RWQCB has been given 30 days to comment on closure of this <br /> site . <br /> 7906 E1 Dorado Street, Stockton ARCO Facility #2130 <br /> PHS/EHD contact - Michael Infurna <br /> Ground water is currently over the top of the screened <br /> interval of the monitoring wells . The vapor extraction system <br /> will continue operation until the end of the year and then the <br /> site will be monitored. The necessity of confirmation borings <br /> will be determined later. <br /> 1617 Fremont Street, Stockton ARCO Facility #5450 <br /> PHS/EHD contact - Michael Infurzaa <br /> Another ground water sample will be collected from the <br /> monitoring well and the site will be evaluated for closure . <br />