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it <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 />