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Chronology Page 2 <br /> 2801 West Lane, Stockton <br /> bsg for UST #2 and EES-6B at 26 feet bsg for UST # 5 excavation contained 23,000 <br /> ppm and 740 ppm TPH-d, respectively. Excavated soils, except for 150 cubic yards with <br /> analytical results less than 100 milligrams per kilogram (mg/kg) for TPH-d, were treated <br /> on-site then transported to BFI landfill in Livermore CA during November and December <br /> 1990. The excavations were then backfill d with clean fill and the remaining 150 cubic <br /> yards of excavated soil. Site Remediation Report dated May 28, 1992 discusses this <br /> work. <br /> 07123-24190 MW-1, MW-2, and MW-3 were destroyed on this date because groundwater was now <br /> below the bottom of these wells. SitRemediation Report dated May 28, 1992 <br /> discusses this work. <br /> 07/30/90 Monitoring wells DMW-1 through DMW-4 were installed on this date. Site Remediation <br /> Report dated May 28, 1992 discusses this work. <br /> 0611991 Eighty five feet of product lines for UST #2 were removed on this date. Approximately <br /> 160 cubic yards of soil was removed to a depth of 5 feet bsg. Results of soil samples <br /> collected revealed the soil was contaminated. The excavated soil was transported to <br /> Port Costa Materials Inc. facility in Port Costa, CA on August 5 and 6, 1991. Site <br /> Remediation Report dated May 28, 1992 discusses this work. <br /> 05/28/92 Date of Site Remediation Report, prepared by Dames & Moore, which discusses site <br /> activities until this date and requests closu a of the site. <br /> 11/29/93 The site was placed in the Local Oversight Program on this date. Previous site work <br /> was under the oversight of the Central Valley Regional Water Quality Control Board. <br /> 1213 & 6193 A Notice of Reimbursement was sent to the responsible parties, American Forest <br /> Products and American Moulding and Millwork on this date. <br /> 01/10/94 Date of The San Joaquin County Environmental Health Department (EHD) letter in <br /> response to the Site Remediation Report date 5/28/92 directing a work plan for <br /> additional site investigation and a discussion of remedial alternatives be submitted. <br /> 08/01/94 Date of Draft Closure Request which recommended conducting groundwater <br /> monitoring for 5 years and proposed that i the groundwater levels remained below 50 <br /> feet bsg and there were no detections of PH-d in the water samples the site should <br /> be closed. <br /> 08/29/94 Date of the EHD letter rejecting the Draft Closure Request, noting that a 5 year <br /> groundwater monitoring program would not address the soil contamination located at <br /> 25 to 35 feet bsg and directing that a feasibility study and a work plan to install a <br /> monitoring well down-gradient be submitted. <br /> 05/02/95 Date of Addendum to Work Plan proposi g installation of two additional soil borings <br /> SB-19 and SB-20. <br /> 05/04/95 DMW-5 was installed and two additional soil borings (SB-19 and SB-20) were <br /> advanced on this date. <br />