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GO - 09 T H U 1 *4 8 • F . 0 -3 ` k'■ KLEINFELDER RE-EXCAVATION WORK PLAN FOR UGST SOIL CONTAMINATION Scope of Work The following eight items presents background information and Kleinfelder's proposed scope of work. These eight items provide the information required by the SJLFID for a re- excavation work plan for underground storage tank (UGST) Soil contanunation. I. Site is located at 134 South Sutter, Stockton, California (Plate 1) and owned by the City of Stockton, Contact person for the City of Stockton is: Mr. Walt Nichols City of Stockton Department of Public Work, Room 317 425 North El Dorado Stockton, California 95202 2. Plate 2 shows the general layout of the site and previous location of the 1,200-gallon UGST. 3. This site was previously occupied by commercial buildings that were demolished in 1988 as part of the City of Stockton Redevelopment Plan. The tank was uncovered during excavation activities associated with new construction at the site, The location of the underground storage tank is shown on Plate 2, Sample Location Map. As the original contents of the tank were unknown and a residual liquid was found in the tank, a sample of the liquid was obtained by a Kleinfelder geologist on February 10, 1989. The analytical results indicated that the liquid sample was 46 percent diesel by weight. The rest of the sample was composed primarily of water. Refer to Kleinfelder project report dated February 17, 1989, for results of the liquid sample. On February 23, 1989, the tank was emptied of its contents and removed from the excavation. Backfill material and a small amount of sta;ocA soil was scraped from the bottom of the excavation with a backhoe. Approxim ,:ely 2 feet below each end of the tank bottom, a sample of native soil was obtained by a Kk felder geologist 171-89-412