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s <br />.j' <br /> KLEINFELDER <br /> RE-EXCAVATION WORK PLAN FOR UGST SOIL CONTAMINATION <br /> S=e of Work <br /> The following eight Mems presents background information and Kleinfelder's proposed <br /> scope of work These eight items provide the information required by the SJLHD for a re- <br /> excavation work plan for underground storage tank (UGST) soil contamination. <br /> 1. Site is located at 134 South Sutter, Stockton, California (Plate 1) and owned by the <br /> City of Stockton. Contact person for the City of Stockton is. <br /> Mr Walt Nichols <br /> City of Stockton <br /> Department of Public Work, Room 317 <br /> 425 North El Dorado <br /> Stockton, Califorrua 95202 <br /> . 2. Plate 2 shows the general layout of the site and previous location of the 1,200-gallon <br /> UGST. <br /> 3 This site was previously occupied by commercial buildings that were demolished in <br /> 1988 as part of the City of Stockton Redevelopment Plan. The tank was uncovered <br /> during excavation activities associated with new construction at the site. The <br /> location of the underground storage tank is shown on Plate 2, Sample Location <br /> Map. As the original contents of the tank were unknown and a residual liquid was <br /> found in the tank, a sample of the liquid was obtained by a Kleinfelder geologist on <br /> February 10, 1989. The analytical results indicated that the liquid sample was 46 <br /> percent diesel by weight. The rest of the sample was composed primarily of water <br /> Refer to Kleinfelder project report dated February 17, 1989, for results of the liquid <br /> sample <br /> On February 23, 1989, the tank was emptied of its contents and removed from the <br /> excavation. Backfill material and a small amount of stained soil was scraped from <br /> the bottom of the excavation with a backhoe Approximately 2 feet below each end <br /> !f of the tank bottom, a sample of native soil was obtained by a Kleinfelder geologist <br /> 171-89-412 <br />