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2375 Tracy Blvd., Tracy <br /> Page 2 <br /> of MTBE in the groundwater samples collected from MW2 again'increased <br /> significantly (no samples were collected from AMS5 during this period), indicating <br /> another possible release. The EHD revealed these findings during the ' <br /> conference call. Since TOSCO was the permitted owner/operator of the UST <br /> system during both these times, EHD will file an unauthorized release report and <br /> start a second case for this site with TOSCO (tank owner/operator) and SMS <br /> Management (land owner) as the responsible parties. <br /> The EHD has been notified that Mr. Kyle Christie with Atlantic Richfield Company <br /> is the site contact for corrective action requirements at the site. There are <br /> currently seven monitoring wells on-site (MW1-MW5 and AMW5-AMW6) and <br /> seven monitoring wells off-site (MW6-MW8 and AMW1-AMW4) that are being <br /> monitored pursuant to corrective action requirements. Quarterly monitoring and <br /> reporting are required until the site investigation and cleanup are complete. <br /> i <br /> The lateral and vertical extent of the soil and groundwater contamination from the <br /> unauthorized releases from the UST's at the site has not been defined. The EHD <br /> will provide a directive letter to the responsible parties to submit a work plan to <br /> complete the investigation of the lateral and vertical extent of contamination. The <br /> letter will be addressed to Mr. Kyle Christie (representing the tank <br /> owner/operators) and a copy will be sent to SMS Management Company. <br /> During the conference call, the EHD indicated that this site may be within 1000 <br /> feet of a City of Tracy drinking water well (located southeast of the site in a City <br /> of Tracy ball park) which would require Enhanced Leak Detection (ELD) testing <br /> of the current operating UST system. Since the conference call, the EHD staff <br /> viewed a "Compass Map" of the Tracy Blvd. and Grant Line Road intersection <br /> and the Tracy Ball Park. The EHD staff also viewed the locations of this site and i <br /> the public well locations on Geotracker (SWRCB web site). Both maps confirm <br /> that the public well in the Tracy Ball Park is within 1000 feet of the site. The UST <br /> owner (currently ConocoPhillips) should be notified by the SWRCB that ELD <br /> testing is required for the UST system at this site. The fifth discussion point in y <br /> your March 10, 2005, letter combines the ELD testing requirement with the need <br /> for additional investigation needed to define the lateral and vertical extent of <br /> contamination at this site. Please be advised, this is a separate issue from the <br /> i <br /> corrective action requirements for the site. <br /> There was discussion about closure of the site during the conference call. The <br /> EHD stated that the letter provided would have a statement that "no further action <br /> was required at this time". That exact language is no longer in the letter. If the <br /> EHD and the CVRWQCB should concur on a NEAR determination for this site, <br /> the letter will state: "based on information in the above-referenced file and with <br /> the provision that the information provided to this agency was accurate and <br /> t <br /> I't <br />