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------------ <br /> LTCv 1 <br /> r1 A S S 0 C I A T E S I N C <br /> E Summary Report of <br /> Pumping Test <br /> Smiths Canal Pump Plant <br /> 2144 Fontana Avenue <br /> Stockton, California <br /> ATC Project No. 54.62574.0002 <br /> =� lA INTRODUCTION <br /> ATC Associates Inc. has prepared this letter report on behalf of the Ci of Stockton to r <br /> P P p City ff <br /> summarize the pumping test performed at 2144 Fontana Avenue in Stockton, California (Figure f <br /> 1). The purpose of the pumping test was to evaluate groundwater extraction and treatment as a E <br /> remedial option. This work was performed at the request of San Joaquin County Public Health <br /> Services, Environmental Health Division (PHS/EHD). The findings of the pumping test are <br /> summarized in the following report. <br /> 1.1 Site Location <br /> The site is located at the south end of Fontana Avenue adjacent to Smiths Canal in Stockton, <br /> California, as shown on Figure 1. The location is generally a residential area. The site is currently <br /> occupied by Smiths Canal Pumping Plant. <br /> 1.2 Site Background and Previous Work <br /> `> An estimated 1,100 gallons of diesel fuel was reportedly leaked from the above referenced 5,000-gallon <br /> fiberglass tank as a result of an inadvertent puncture. The tank was repaired and returned to active <br /> service. <br /> In May 1988, Ensco Environmental performed a limited investigation, advancing a single soil <br /> boring 1 beneath the northern fill side of the tank to a maximum depth of a roximatel 17 <br /> r g (B- ) (fill) P PP Y <br /> feet below grade. A soil sample collected from this boring at 17-17.5 feet below ground surface <br /> (bgs) recorded 130 parts per million (ppm) total petroleum hydrocarbons as diesel (TPHd). <br /> Results of soil sample analyses are summarized in Table 1. As a result of this initial investigation, E <br /> PHS/EHD required further assessment of the extent of contamination at the subject site. <br /> A subsurface investigation was conducted on October 17 and 18, 1989 by WaterWork Corp. Six soil <br /> borings (SB-1, SB-2, MW-1, MW-2, MW-3, and MW4) were drilled at the subject site to depths <br /> ranging from 16 to 36 feet bgs. Four of these borings were completed as two-inch diameter <br /> t; <br /> wAfi2574.02Vgm t\RPT-pump t Ldw 1 <br /> i <br /> �f� <br />