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SECTION 3 <br /> RESULT'S OF RECEIVE' SOIL AND <br /> GROUNDWATER SAMPLING <br /> This section presents field observations and laboratory <br /> ed the analytical <br /> Manna <br /> results of soil and groundwater sampling <br /> Pro Facility during November and December 1990. During the period <br /> November 8 through 15, 1990, nine soil borings (MP-1 through MP-9) <br /> were installed. Three of these borings were converted to 4-inch <br /> monitoring wells. These wells were constructed to assess <br /> tion and the direction and gradient of <br /> groundwater contamina <br /> groundwater flow. During the period December 1 through 7, 1990, 16 <br /> thouled and <br /> additional soil boringsese P-10borings,r MP I4, W-P--15, and MPh MP-25) were i18 were <br /> sampled. Three w <br /> converted to monitoring wells. <br /> during the installation of the 25 soil borings has been <br /> Data gatheredg <br /> used to construct two cross-sections that illustrate the lithology <br /> beneath the site. The locations of the cross-sections are shown on <br /> ections are shown in Figures 3-1 and 3-2. <br /> Figure 1-2. The cross-s <br /> Typically, these borings encountered sequences of clay and sand to a <br /> total depth of 60 feet. The typical geologic sequence encountered is <br /> shown below. <br /> € , D Dent i# � ri • n o f i <br /> h h <br /> 0-25 clay <br /> coarse sand <br /> 3545 fine sand grading to sandy clay <br /> 45-50 clay with intermittent sand leases <br /> 50-60 clay <br /> No significant unconfined groundwater was encountered in any of <br /> --_ ----the-borings.-First-water-was encountered at depths of between 43 and <br /> levels quickly rose to between 39 and-40— <br /> 48 feet below grade. Water- <br /> 3-1 <br />