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FIRST QUARTER, 1997 <br /> GROUNDWATER MONITORING REPORT <br /> FORMER DIAMOND LUMBER - MANTECA <br /> APRIL, 1997 <br /> 3.2 Groundwater Conditions <br /> The depths to groundwater measured on March 28, 1997 ranged between 14.23 and 14.71-feet <br /> below ground surface (bgs). Since the October 15, 1991 sampling event, the groundwater levels <br /> are at historical highs, as shown in Table 1. The elevations of the groundwater ranged from <br /> 18.71 to 19.12-feet above mean sea level (MSL). The direction of the groundwater flow was <br /> ' calculated using the BEI wells and SRK wells, separately. This was done because the wells are <br /> perforated at slightly different depths and their respective water levels appear to reflect the <br /> hydrologic conditions in two somewhat different water bearing zones. <br /> The groundwater directions of flow and gradients for the two well groups are in a northwesterly <br /> � <br /> direction at a gradient of 0.0013-feet/feet(ft/ft) in the BEI wells and a northeasterly direction at a <br /> gradient of 0.0018-ft/ft in the SRK wells. The two well clusters continue to show slight <br /> differences in groundwater elevations when compared to each other. Incorporating the new Park <br /> wells into the groundwater flow calculations, groundwater flow appears to be in a more <br /> ' northeasterly direction at a gradient of 0.0021-ft/ft. The current groundwater gradients are <br /> presented on Figure 4, and historical groundwater gradients are presented on Figure 5. <br /> 1 <br /> 1 _ <br />