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Kyle Christie <br /> Page 2 <br /> of a monitoring well on his property which should have <br /> completed the northerly delineation of the groundwater plume . <br /> Monitoring wells 3 and 4 in the north portions of the site are <br /> cross gradient and the sample results from these wells <br /> indicate marginal contamination . The necessity for the off <br /> site monitoring well will be evaluated by PHS /EHD . <br /> The vapor extraction system was shut down but is back in <br /> operation after replacement of the catalyst . <br /> 3425 N . Tracy Blvd . , Tracy ARCO Facility # 2093 <br /> PHS / EHD contact - Harlin Knoll <br /> ARCO is in the process of securing permits from the City of <br /> Tracy for the installation of the vapor extraction system . <br /> The bid for the installation of the vapor extraction system <br /> should be awarded by the end of June and installation of the <br /> system should begin in July . <br /> Upgradient monitoring well 12 is being considered for <br /> destruction since the water sample results have consistently <br /> been nondetect . Repair of the well heads on some of the <br /> monitoring wells is pending . <br /> 2908 West Benjamin Holt Drive , Stockton ARCO Facility #2133 <br /> PHS /EHD contact - Mary Meays <br /> The operation of the vapor extraction and air sparge systems <br /> was discussed . A preliminary draft of dissolved oxygen <br /> readings that were taken from the site since the air sparge <br /> initiation was presented . Monthly measurements of dissolved <br /> oxygen will continue until otherwise notified . Future <br /> quarterly reports will include an evaluation of the expected <br /> time for remediation and a calculated estimate of the volume <br /> and mass of soil and groundwater contamination . <br /> 1612 Hammer Lane , Stockton ARCO Facility # 548 <br /> PHS /EHD contact - Mary Meays <br /> Arco indicated that they were in the process of evaluating the <br /> future use of the site , whether it be to replace the tanks or <br /> close the facility . The permitting process for a possible <br /> vapor extraction system has been initiated with the San <br /> Joaquin Valley Unified Air Pollution Control District . <br /> However , at this time , no due date for a Corrective Action <br /> Plan was established . <br /> 800 East Kettleman Lane , Lodi ARCO Facility # 2076 <br /> PHS /EHD contact - Mary Meays <br /> Since groundwater contamination continues to not be evidenced , <br /> a proposal to reduce the sampling frequency will be submitted . <br /> There are no immediate plans to initiate soil remediation at <br /> this site . <br />