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V 3 <br /> F <br /> A S S O C I A T E S I N C <br /> GROUNDWATER FLOW DIRECTION <br /> Water level measurements were collected from wells MWA through MW-6 on May 22, 2001 <br /> Water levels ranged from 25 96 to 26 74 feet below the tops of the well casings, representing an <br /> average decrease in the water table elevation of approximately 1 21 feet since February 2001 <br /> The water level data were used to develop the groundwater elevation contour map (Figure 3) <br /> Assuming that horizontal isotropic conditions prevail, groundwater in the uppermost aquifer <br /> beneath the site flowed generally towards the east The average hydraulic gradient on May 22, <br /> 2001 was calculated to be 0 005 ft/ft or approximately 26 ft/mile A summary of groundwater <br /> monitoring data is presented in Table 1 <br /> CONCLUSIONS <br /> Concentrations of petroleum hydrocarbon constituents increased in well MW-3 Concentrations <br /> of petroleum hydrocarbons decreased to nondetectable levels in wells MWA and MW-2 <br /> Concentrations of petroleum hydrocarbons remained at nondetectable levels in wells MW-4, <br /> MW-5, and MW-6 <br /> The direction of groundwater flow and the magnitude of hydraulic gradient are generally <br /> consistent with previous quarters <br /> RECOMMENDATIONS <br /> Based on the results of the second quarter 2001 monitoring episode, we recommend performing <br /> third quarter 2001 monitoring and reporting Groundwater samples should be analyzed for <br /> TPHg, BTEX, and MTBE <br /> w 1626051quartlyl2gr-2001 doc 3 <br />