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v o <br /> • A S S U C I A T E S I N C <br /> GROUNDWATER FLOW DIRECTION <br /> Water level measurements were collected from wells MW-1 through MW-6 on January 29, 2003 <br /> Water levels ranged from 26 40 to 27 26 feet below the tops of the well casings, representing an <br /> average increase in the water table elevation of approximately 1 57 feet since October 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 with an appearant slight depression in the <br /> vicintiy of well MW-1 The average hydraulic gradient on January 29, 2003 was calculated to be <br /> 0 0005 ft/ft or approximately 2 5 ft/mile A summary of groundwater monitoring data is <br /> presented in Table 1 <br /> CONCLUSIONS <br /> Concentrations of petroleum hydrocarbon constituents decreased in well MW-3 during the first <br /> quarter 2003 below levels measured during recent quarterly monitoring events Concentrations <br /> of petroleum hydrocarbons remained at nondetectable levels in wells MW-1, MW-2, MW-4, <br /> MW-5, and MW-6 <br /> The direction of groundwater flow and magnitude of the hydraulic gradient areeneralI <br /> g Y <br /> consistent with previous quarters <br /> RECOMMENDATIONS <br /> Based on the results of the first quarter 2003 monitoring event, we recommend performing <br /> second quarter 2003 monitoring and reporting Groundwater samples should be analyzed for <br /> TPHg, BTEX, and MTBE <br /> w Iwordpro1626051quart1y\1QR-2003 doe 3 <br />