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0 <br /> ARCO Sites <br /> Page 2 <br /> 7906 EI Dorado Street, Stockton ARCO Facility #2130 <br /> PHS/EHD contact - Michael Infurna <br /> Groundwater is currently over the top of the screened interval of the <br /> monitoring wells. Installation of additional monitoring wells may be <br /> required. Site information will be reviewed and it will be determined if <br /> further vertical definition is required for this site. Confirmation soil borings <br /> may be required prior to closure. <br /> 2908 Benjamin Holt, Stockton ARCO Facility #2133 <br /> PHS/EHD contact - Margaret Lagorio <br /> The air/bio sparge system is in operation. The vapor extraction system is <br /> operated when it is determined to be feasible according to groundwater <br /> depth and vapor levels extracted. Contamination levels appear to be <br /> decreasing. <br /> 3425 Tracy Blvd., Tracy ARCO Facility #2093 <br /> PHS/EHD contact - Harlin Knoll <br /> The air/bio sparge system is in operation and contamination levels appear <br /> to be decreasing. <br /> 3212 California Street, Stockton ARCO Facility #2186 <br /> PHS/EHD contact - Carol Oz <br /> The fourth quarter report for 1997 which contains the information obtained <br /> from the installation of monitoring well 4 will be submitted to PHS/EHD. <br /> After review of this information, PHS/EHD will comment on the site. A <br /> survey of wells existing within a 2000 foot radius of this site must be <br /> conducted and results provided to PHS/EHD. <br /> 25775 Patterson Pass Road, Tracy ARCO Facility #6100 <br /> PHS/EHD contact - Margaret Lagorio <br /> The mass of contamination remaining at this site will be calculated and <br /> submitted as part of the closure report to be prepared for this site. <br /> 225 Cherokee Lane, Lodi ARCO Facility #760 <br /> 501 Kettleman Lane, Lodi ARCO Facility #434 <br /> PHS/EHD contact - Margaret Lagorio <br /> The "No Further Action " letters for these sites have not been issued <br /> because the monitoring and vapor wells have not been destroyed. ARCO <br /> requested the wells not be destroyed. PHS/EHD explained there was a <br /> San Joaquin County Ordinance requiring that wells no longer in use be <br /> destroyed. <br />