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KOWA <br /> m <br /> J 0MIXE M! <br /> Mr. Ted Knowles <br /> February 6, 1909 <br /> 202/799-5027.04 <br /> On September 24 and 25, 1987, three soil borings were <br /> drilled, and monitoring wells <br /> (MW) were installed within the <br /> borings (Figure 2, Appendix I) . MW-1 through MW--3 were drilled <br /> F•w to total depths of 65 feet, with Mw-1 and MW-2 screened from 35 <br /> feet below surface to total depth. MW-3 was screened from 25 to <br /> t <br /> 55 feet below surface due to drilling difficulties which hampered <br /> the well completion process. Results of laboratory analyses of <br /> the associated soilsamples are summarized in Table 1 and <br /> tg presented in A <br /> a; ppendix 11. <br /> Y <br /> On February 2 " <br /> ' , 1988, the three existing <br /> taring wells were re-sampled. The sampling groundwater moni- <br /> toring <br /> results are sum- <br /> marized in GTI's "preliminary Report" for the site. <br /> yy} �f9 <br /> E; <br /> On June 24 1988 <br /> PI <br /> Eleven soil borings were drilled at the <br /> site to further define the extant �f soil contamination ;n the <br /> #' vicinity of the former underground tank, pump islands, and <br /> ' product <br /> delivery lines (Figure 2 and Appendix I) . Soil boring 1 <br /> 4 ($G-1) was located In the middle of the previously backfilled <br /> tank excavation <br /> , and drilled to a depth of 45.5 feet in an <br /> a attempt to define the vertical extent of soil contamination. # <br /> Tank backfill material, consisting of sand <br /> u encountered to a depth of approximately silt., and clay, was <br /> y 25 feet, SS-2 through <br /> SB-10 were drilled in the vicinity of the <br /> pump Islands and <br /> Product delivery lines to depths of approximately 4.5 feet, SB- <br /> i f 11-.4as drilled a distance from recognized y contamination (4.5 feet total depthg to check <br /> sources of .72 <br /> r background levels <br /> (4 of:lead .in the shallow suit. Analytical} _ytical results for,soil samples - <br /> - collected-;ram the borings are summarized in Table 1 andpre- <br /> sented <br /> r <br /> ' in Appendix II. The three existing <br /> ,., agaii, purged and .sampled at this groundwater wells were <br /> h s time. The results of the, work <br /> performed to date were summarized in GTI's "Preliminary-Report, <br /> F ' . for the site. <br /> K .. <br /> `j - - - _ - - <br /> t� P <br /> ry <br /> ��t <br />