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' FIRST QUARTER, 1997 <br /> • GROUNDWATER MONITORING REPORT <br />' FORMER DIAMOND LUMBER - MANTECA <br /> APRIL, 1997 <br /> t 3.2 Groundwater Conditions <br /> I <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 /> P' g ln' P Y <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 /> S 4 _ <br /> x <br /> I <br /> w 1 <br /> N <br /> t <br />_1 <br /> i <br /> 1 <br /> 3 <br />