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Drill Cuttings <br /> Drill cuttings were segregated and stockpiled along with the existing <br /> stockpiled soil. <br /> Abandonment of Bore Holes <br /> All bore holes were backfilled with a grout mix consisting of sand, <br /> cement, bentonite powder, and clean water in the following ratios: <br /> • One 94-pound sack of Portland cement; <br /> • Two sacks of Lonestar 120 sand; <br /> 5 pounds of bentonite powder; and <br /> • 4.5 to 6.5 gallons of clean water. <br /> Water Level Measurements <br /> Groundwater elevations were measured in the three developed <br /> monitoring wells. The elevations of the tops of the casings were <br /> surveyed in relation to a permanent on-site reference point. Water <br /> Ievels were determined using the wetted tape method to reference the <br /> depth to groundwater to the top of the surveyed well casing. All <br /> water levels were measured at the same time. The water elevations <br /> E, were used to determine the groundwater gradient and direction of <br /> a.. <br /> flow. <br /> ' Groundwater Sample Collection <br /> A hydropunch was used to collect groundwater samples in the <br /> borings. The method allows the sampling of groundwater without <br /> the necessity of well installation. The hydropunch employs a probe <br /> made of 2-inch steel tube equipped with a detachable: penetration <br /> cone. The probe is driven into the formation material in advance of <br /> hollow stem augers. The probe is then, retracted from the cone to <br /> expose a screen to the potential water bearing zone. Water samples <br /> ---— T T__ --- --- <br /> _ are collected witha Teflon bailer, which is introduced into the probe. <br /> ___ <br /> Exact Iocations_ for collection of-groundwater samples wither tlae—" --- -- <br /> hydropunch were made in the field based on results of analyses of <br /> soil samples. Hydropunch samples were used to assess the nature <br /> ti <br /> e. - <br /> 2-3 <br />