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Cecchuu Cecchtni and G+ovannont Fueling Island .® 32c kgrouunnd 2.1 Site Setting The site is located in east Stockton, California at 3535 East Cherokee Road (site) The site is at an approximate elevation of 25 feet above mean sea level and as the topography of the area is relatively flat (USGS, 1968) The site is situated in a commercial district To the north of the site is a truck repair shop, to the east is State Highway 99, and to the west a truck scale and vacant lot The Stockton Diverting Canal is approximately 2,200 feet to the southwest of the site 2.2 Site History One well, designated UST-1, and three new wells designated UST-2, UST-3, and UST-4 are located in the fueling island area (Figure 2 - Site Map) Well UST-1 had problems with infiltration of fuel from the surface and its seal was repaired twice in 1993 The latest repair was made in March 1995 In October 1992, ESE implemented a quarterly monitoring program that includes the measurement of ground water elevation and collection of ground water samples from well UST-1 As of July 1, 1993 the monitoring program also included water level measurements in three additional ground water monitoring wells (SI-1, SI-2, and SI-3) located in the northern portion of the site and two water supply wells, "large" well and "small" well (see Figure 2 - Site Map) In an effort to ascertain the size of the potential hydrocarbon plume at UST-1, three new monitoring wells were installed at the site on April 4, 1995 Three additional monitoring wells were proposed by ESE to further monitor hydrocarbons in ground water beneath the fuel island in a Workplan dated September 19, 1994 An addendum to the Workplan dated January 24, 1995 was prepared to document changes location of the wells per a letter dated December 5, 1994 from Mr Michael Infurna of the SJCEHD The permit for monitoring well installation approved on March 22, 1995 Beginning on April 4, 1995 three monitoring wells were installed UST-2, UST-3, and UST-4 and were completed on April 5, 1995 Ground water monitoring and sampling ground water recovery from UST-1 as an interim remediation measure Work commenced on April 4, 1995 and was completed by April 5, 1995 Soil samples selected for laboratory analysis were capped, labeled, and placed in an ice chest under chain-of-custody for transport to a California Certified Laboratory Soils were tested for Total Petroleum Hydrocarbons as Diesel (TPH-D) using EPA method 3553/8015 modified, for Total Petroleum Hydrocarbons as Gasoline (TPH-G) using EPA f 169254001gtrly rpMgtt95 rpt 2 Environmental Science&Engnneermg, Inc a