SITE INFORMATION AND CORRESPONDENCE

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r. f Chronology Jay's Mini Mart 3302 West Lane, Stockton 11/21/97 Three gasoline underground storage tanks (UST$) were removed under the Environmental Health Department (EHD) permit and inspection on this date. Odor and discoloration of the soil at the north end of the UST excavation were -noted by the EHD staff. Soil samples collectedi'at 17 feet in this area of the excavation were analyzed and confirmed the soil was contaminated. 11/26/97 Excavation of contaminated soil from the north end of UST excavation occurred on this date. 03/20/98 Date of Underground Storage Tank Removal Report that discusses removal, excavation and has soil sample analytical results. MTBE was found in the soil samples beneath two of the dispensers. New USTs were placed in the same location. 02/08/99 An Unauthorized Release Report and a Notification cation of Hazardous Waste t Discharge were filed on this date. The site was''also placed in the Local j Oversight Program. 02/10/99 The EHD received receipts for disposal of soil at Forward Landfill on this date. About 468 yards were disposed but only about 100 yards were from excavation of contaminated soil on 11/26/97. I 09/07/00 Soil boring 131 was completed to a depth of 50 near the dispenser area on this date. Soil samples and a groundwater sample were collected. 09/20/00 Date of Environmental Assessment that discusses the results from B1 (MTBE was found at 10 micrograms per liter in the water sample). 5/22-23/03 Soil borings B2 through B4 were completed during this time. 06/27/03 Date of Additional Assessment Report that discusses the May 2003 work. Low levels of soil and groundwater contamination we're evidenced including 1.2 DCA. 1/12-13/04 Monitoring wells MW1 through MW3 (screened from 45 to 65 feet) were installed during this time. 06/24/04 Date of Summary Report of Subsurface Investigation that discusses the January i 2004 work. Soil and groundwater samples were'non-detect. 5/22-24/06 Geoprobe borings AS81 through ASB6 were performed during this time. 07/06/07 Date of Subsurface Investigation Report that discusses the May 2006 work. 07/28/08 Date of Site Closure Report recommending closure of the site. 10/01/08 Date of EHD letter requesting additional site informatiori and revisions to the 7/28/08 report. 11/12/09 Date of Supplement to Site Closure Report that rovideSr additional information and recommends closure of the site.