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1 <br /> Working To Restore Nature <br /> GROUNDWATER FLOW DIRECTION <br /> Water level measurements were collected from wells MW-1, MW-2 and MW-3 on Pune 2, 1994 <br /> ' Water levels ranged from 28.06 to 28.43 feet below the tops of the well casing elevations, <br /> representing an average decrease in the water table elevation of approximately 0.80 feet since <br /> March 1994 The water level data were used to develop the groundwater elevation contour map <br /> (Plate 3). Assuming that horizontal isotropic conditions prevail, groundwater in the uppermost <br /> ' aquifer beneath the site flowed in a southeast direction. The hydraulic gradient on June 2, 1994 <br /> was calculated to be 0.02 ft/ft or 102 ft/mile A summary of groundwater monitoring data is <br /> presented in Table 2. <br /> CONCLUSIONS <br /> Petroleum hydrocarbon analytes remained non-detectable in the groundwater sample collected <br /> from well MW-1. Concentrations of petroleum hydrocarbon analytes increased in well MW-2 <br /> Concentrations of petroleum hydrocarbon analytes remained the same order of magnitude or <br /> decreased slightly in well MW-3 since the last monitoring episode in March 1994. <br /> 1 The direction of groundwater flow has changed approximately 90 degrees and the magnitude of <br /> hydraulic gradient has increased since March 1994. This may be due to the site's proximity to <br /> the Stanislaus River and seasonal changes Groundwater elevations have decreased due to <br /> seasonal conditions. <br /> 1 RECONIlMIENDATIONS <br /> Based on the results of the second quarter 1994 monitoring episode, we recommend continued <br /> quarterly monitoring at the site. <br /> 1 <br /> ' 1500781QUARTLYI2QR-1994 FNL 3 <br />