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k`■ KLEINFELDER <br /> File No. 20-3304-01 <br /> March 8, 1990 <br /> Page 3 <br /> feet below the existing ground surface. In order to establish groundwater <br /> gradient, the ground surface elevations at the boring locations were <br /> measured using surveying equipment. Presented below is a summary of the <br /> survey information and groundwater ratings. Since only the gradient was <br /> desired, we selected a datum elevation of 0.0 feet for the ground surface <br /> at Boring 8. <br /> Groundwater <br /> Elevation Based <br /> On Ground Surface <br /> Depth to Groundwater Elevation of 0.0' at <br /> Location Below The Ground Surface Boring 8 <br /> Boring 6 -23' -23 .20' <br /> Boring 7 -23' -23 .24' <br /> Boring 8 -23' -23.00' <br /> Based on our field measurements, we conclude that the groundwater gradient at the <br /> site is generally towards the northeast direction. Recent San Joaquin County flood <br /> control maps concur with our findings. <br />