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C�5 <br /> i I � <br /> • A S S O C I A T E S I N C <br /> an average increase in the water table elevation of approximately 0 20 feet since September <br /> 2000 The water level data were used to develop the groundwater elevation contour map (Figure <br /> 3) Assuming that horizontal isotropic conditions prevail, groundwater in the uppermost aquifer <br /> beneath the site generally flowed towards the south-southwest The average hydraulic gradient on <br /> December 8, 2000 was calculated to be 0 0009 ft/ft or approximately 5 ft/mile A summary of <br /> groundwater monitoring data is presented in Table 1 <br /> ANALYTICAL RESULTS <br /> TPHd was detected above laboratory detection limits in the samples collected from wells MW3 <br /> and MW4 at concentrations of 150 parts per billion(ppb) and 1,900 ppb, respectively TPHg and <br /> BTEX were not detected in the samples collected from wells MW3 and MW4 The samples <br /> collected from wells MW1, MWS, and MWb contained no detectable concentrations of TPHg, <br /> TPHd, BTEX, or MTBE Well MW2 was not sampled due to the presence of free product A <br /> summary of analytical results is presented in Table 2 Laboratory data sheets and chain-of- <br /> custody <br /> hain-ofcustody documentation are contained in Attachment 2 <br /> CONCLUSIONS <br /> . Concentrations from wells MWl and MW3 through MW6 remain generally consistent with the <br /> results from the previous sampling event Free product was still present in well MW2 during the <br /> sampling event The direction and magnitude of groundwater flow is generally consistent with <br /> the previous sampling event, and groundwater elevations have increased since September 2000 <br /> • <br /> w 1625001quart1y14gr-2000 doc 3 <br />