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Test Pit 3 was dug near the middle of the proposed fuel island, between the~ <br />proposed rows of piers. <br /> <br />Our exploration indicated that the store area is underlain by about 6.5 to <br />over l0 feet of fill. The fill was placed many years ago to fill a deep <br />swale which apparently ran along the eastern property line. It appears that <br />the fill depth decreases towards the south and west. The site fill is about <br />4 to 5 feet deep at the middle of the fuel island, but is probably deepe~ to <br />the east and shallower to the west. <br /> <br />The site fill consists of low-plastlcity, friable sandy silt. The fill is <br />stiff to very stiff and contains relatively little organic matter. A thin <br />layer of organic.fill was encountered at a depth of about 3 to 5 feet in <br />Test Pits 1 and 2. The organic fill had a medium to stiff consistency. <br /> <br />The underlying native soil consisted of a brown, friable, stiff to hard, <br />sandy silt. The upper soil of the original ground surface was moist and <br />softer in Test Pit 3 {the fuel island). The native silt extended to a d'epth <br />of at least l0 feet {the limit of our exploration), <br /> <br />No ground water Or concentrated seepage was noted in the exploratory test <br />pits. The soil was relatively moist in Test Pit 3 below a depth of about <br />4 feet, indicating some possible perched ground water. <br /> <br />Discussion and Conclusion <br /> <br />The observed fill is generally stiff, free from organic debris, and does not <br />appear to be highly compressible. The fill has been on the site for many <br />years and most of the settlement of the original ground surface due to the <br />weight of'the fill has likely already occurred, Foundation loads for the <br /> <br /> <br />