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• A S S 0 C I A T E S I N C <br /> summary of analytical results is presented in Table 1 Laboratory data sheets and chain-of- <br /> custody documentation are contained in Attachment 2 <br /> GROUNDWATER FLOW DIRECTION <br /> Water level measurements were collected from wells MWA through MW-6 on July 10, 2002 <br /> Water levels ranged from 27 38 to 28 18 feet below the tops of the well casings, representing an <br /> average decrease in the water table elevation of approximately 0 35 feet since April 2002 The <br /> 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 July 10, <br /> 2002 was calculated to be 0 001 ft/ft or approximately 5 6 ft/mile A summary of groundwater <br /> monitoring data is presented in Table 1 <br /> CONCLUSIONS <br /> Concentrations of petroleum hydrocarbon constituents increased slightly in well MW-3 during <br /> the third quarter 2002, but remain at levels consistent with recent quarterly monitoring events <br /> Concentrations of petroleum hydrocarbons remained at nondetectable levels in wells MW-1, <br /> MW-2, MW-4, MW-5, and MW-6 <br /> The direction of groundwater flow and magnitude of the hydraulic gradient are generally <br /> consistent with previous quarters <br /> RECOMMENDATIONS <br /> Based on the results of the third quarter 2002 monitoring event, we recommend performing <br /> fourth quarter 2002 monitoring and reporting Groundwater samples should be analyzed for <br /> TPHg, BTEX, and MTBE <br /> w lwordpro1626051quartly13QR-2002 doc 3 <br />