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S%R4ARX OF FINDINGS AND CONCLUSIOWS <br /> The findings and conclusions of the activities completed to <br /> date can be summarized as follows: <br /> 1) The results of this sampling event indicate the continued <br /> presence of hydrocarbon contamination in the ground <br /> water. <br /> 2) Dewatering activities west of the site have caused the <br /> ground water flow direction to shift from the northeast <br /> to northwest direction. The dewatering has also affected <br /> the contaminant transport beneath the site. <br /> 3) The value for the hydraulic conductivity as determined by <br /> the slug and the pump test methods is 0.015 and <br /> - 6.9 meters per day, respectively. The transmissivity and <br /> storage coefficient of the aquifer were determined to be <br /> 40.2 m2/day and 1.09 X 10_4 m/m. <br /> k 4) The calculated average linear velocity of a fluid <br /> particle moving in the aquifer onsite is <br /> 6.9 X 10_3 meters per day, while the offsite average <br /> linear velocity is 1.5 X 10-5 meters per day. The <br /> difference in the on- and offsite linear velocities can <br /> be expected due to the proximity of the onsite test well <br /> �-� to the tank cavity. The offsite linear velocity is <br /> r_. <br /> probably more representative of the linear velocity of <br /> the site. <br /> � 5) Additional investigation work is necessary to define the <br /> extent of hydrocarbon contamination in the ground water <br /> and determine the appropriate remedial measures. <br /> 3r <br /> 12 <br /> i <br />