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CvvATC <br /> . A S s o C I A T E S I N C <br /> The groundwater analytical results measured at monitoring well MW2 showed detectable <br /> concentrations of TPHg and benzene TPHg was detected at a concentration of 360 pg/L and <br /> benzene was detected at 3 6 pg/L <br /> The groundwater analytical results measured at monitoring well MW3 showed detectable <br /> concentrations of TPHg and ethylbenzene TPHg was detected at a concentration of 300 pg/L <br /> and ethylbenzene was detected at 15 pg/L <br /> The Maximum Contaminant Level (MCL) for benzene, 1 pg/L, was exceeded in groundwater <br /> samples collected from monitoring wells MW1 and MW2 which had detected concentrations of <br /> 9 0 and 3 6 pg/L respectively <br /> GROUNDWATER FLOW DIRECTION <br /> Water level measurements were collected from monitoring wells MW 1, MW2, and MW3 on <br /> March 5, 2003 Water level elevations ranged from 38 32 to 38 38, representing an average <br /> increase in water table elevation of approximately 0 86 feet since December 2002 The water <br /> level data were used to develop the groundwater elevation contour map (Figure 3) Assuming <br /> that horizontal isotropic conditions prevail, groundwater in the uppermost aquifer beneath the <br /> site flowed towards the northwest The average hydraulic gradient on March 5, 2003 was <br /> calculated to be 0 0007 or approximately 3 5 ft/mile A summary of groundwater monitoring <br /> data is presented in Table 1 <br /> CONCLUSIONS <br /> Groundwater flow direction and gradient is consistent with previous sampling events Water <br /> table elevations have increased since the December 2002 monitoring event Groundwater <br /> analytical results remained within historical parameters as set by previous groundwater analytical <br /> results <br /> w\wordpro11498i1Reports\IQR-03 doc 3 <br />