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CV7ATC <br /> • A S S O C I A T E S 1 N C <br /> The groundwater analytical results measured at monitoring well MW3 showed detectable <br /> concentrations of TPHg at 350 pg/L, benzene at 1 1 pg/L, ethylbenzene at 12 pg/L, and xylenes <br /> at 13 pg/L <br /> The Maximum Contaminant Level (MCL) for benzene, 1 pg/L, was exceeded at monitoring <br /> wells MW1, MW2, and MW3 which had detected concentrations of 30 pg/L, 2 4 pg/L and 1 1 <br /> pg/L, respectively <br /> GROUNDWATER FLOW DIRECTION <br /> Water level measurements were collected from monitoring wells MW1, MW2, and MW3 on <br /> June 7, 2002 Water level elevations ranged from 37 51 to 37 58, representing an average <br /> decrease 1n water table elevation of approximately 0 04 feet since March 2002 The water level <br /> data were used to develop the groundwater elevation contour map (Figure 3) Assuming that <br /> horizontal isotropic conditions prevail, groundwater in the uppermost aquifer beneath the site <br /> flowed towards the northeast The average hydraulic gradient on June 7, 2002 was calculated to <br /> be 0 0011 or approximately 6 ft/mile A summary of groundwater monitoring data is presented <br /> 1n Table 1 <br /> CONCLUSIONS <br /> • Groundwater flow direction and gradient is consistent with previous sampling events Water <br /> table elevations have increased slightly since the March 2002 monitoring event Groundwater <br /> analytical results remained within historical parameters as set by previous groundwater analytical <br /> results <br /> w lwordpro1149811Reportsl2QR-02 doc 3 <br />