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9j KLEINFELDER <br /> 3 <br /> i <br /> 5 DISCUSSION AND RECOMMENDATIONS <br /> 5.1. GROUND WATER <br /> I . <br /> Ground water samples collected from three ground water monitoring wells <br /> were analyzed for TPH and gasoline related constituents. Analytical <br /> res»lts of samples indicate petroleum hydrocarbons are not present in the <br /> ground water at the three monitoring well locations. During the drilling, <br /> there was no visual or PID indication of contamination in the unsaturated <br /> z <br /> s or saturated soil. <br /> 3 <br /> The three wells were triangulated around the tank excavation to provide <br /> '. lye ef!•ctive monitoring of the ground water and to provide a estimated ground <br /> k ' water flow direction. Ground water elevations measured in the three wells <br /> r <br /> S indicate a flow 'direction to the north. <br /> a - <br /> a <br /> The ground :water monitoring wells may be left in place to monitor the new <br /> underground :fuel storage tanks to be installed. The wells will provide . <br /> 5 <br /> flexibility for The Customer Company to select thz most appropriate <br /> monitoring program under Subchapter 16. - <br /> I 5.2 SOIL PILE r <br /> . #Wy Approximately 100 cubic yards of backfill and native soil were excavated <br /> during the removal .of the underground fuel storage tanks. 'Ten soil <br /> samples from the pile were screened in the field with the PID. Six;of the <br /> 10 samples were composited into three samples by Chemwest and.analyzed for <br /> TPH and gasoline related constituents. <br /> �. Benzene was below laboratory reporting limits in all three samples The <br /> two samples composited from the northern third ofthe pile had a-TPH <br /> concentration below reporting limits The samples composited from the <br /> Li <br /> c <br /> 47-8$-502 10 <br /> + <br /> �J <br /> tiaeeii m� <br />