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feet below grade in the bore hole, indicating that the water is <br /> confined. The static water level appears to be at a depth of 37 feet <br /> below grade. The thickness of the water-bearing layer appears to <br /> vary from less than 1 foot to more than 10 feet in the vicinity of the <br /> excavation. <br /> ' Six of the borings were converted to 4-inch-diameter monitoring wells <br /> (Figure 1-2). Elevations of the well casings for wells MPW-1, MPW-2 <br /> and MPW-3 were surveyed in the field using benchmarks of known <br /> elevation. Subsequent measurement of depth to groundwater in the <br /> three surveyed wells showed a northerly groundwater gradient with <br /> ' a slope of 1 foot per 1000 feet (0 001) <br /> MPW- <br /> ' MPW-2andMPWdevelopedestimated <br /> on <br /> November 19, 19900Wecharge rates re du ing <br /> development and appear below <br /> • MPW-1 20 gallons per hour <br /> • MPW-2 60 gallons per hour <br /> ' • MPW-3 20 gallons per hour <br /> ats-ADALyficalResyf it lin <br /> 1 soil samples Analytical results of al les are shown in Table 3-1 Soil P <br /> samples were taken h MP-25.n all f (These borings werePinsta ed to obtain, <br /> and MP-22 through <br /> groundwater samples with a hydropunch.) <br /> ' Results of soil analyses from borings MP-1 though MP-8, installed <br /> during November, show diesel and gasoline contamination in <br /> var}nng degrees on' eter of <br /> the west)S1Althoughde and no around soil esamples eastern were taken <br /> were the excavation (Figure <br /> from boring MP-9 on the north side of the excavation, diesel and <br /> gasoline odors were noted in this boring. The highest concentration <br /> of diesel was found in boring MP-2 at a depth of 40 5 feet Gasoline <br /> was also found at the highest concentrations in this area This <br /> correlates with the October findings of diesel at a depth of 33 feet at <br /> ' slot 6. <br /> Diesel and gasoline contamination was also encountered in <br /> substantial concentrations at depths of 41 to 46 feet below grade in <br /> boring MP-7 These samples were not submitted for laboratory <br /> analysis since contaminationof slot 3en encountered verylt should be noted little contaminated t <br /> hat <br /> previous sampling soil <br /> at a depth of 33-35 feet below grade <br /> ' 3-2 <br />