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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 /> 1 <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 />' <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 /> levels were deternuned 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 /> were used to determine the groundwater gradient and direction of <br /> flow <br />' <br /> Groundwater Sample Collection <br /> 1 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 /> are collected with a Teflon bailer, which is introduced into the probe <br /> Exact locations for collection of groundwater samples with the <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 />' 2-3 <br />