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1 <br /> 4.0 Conclusions and Recommendations <br /> The groundwater at the site continues to flow to the south-southwest. Two distinct <br /> potentiometnc surfaces were still identifiable at the site, based on the groundwater elevations <br />' measured in the six monitoring wells installed within the shallow and deep zones of the <br /> unconfined aquifer (Figure 2). A groundwater gradient was calculated from both the shallow <br /> wells (0.006 ft/ft) and the deep wells (0 002 ftlft). This gradient is typical for groundwater at <br /> this site <br /> The water level at the site has risen b as much as 3.98 feet (MW-1) since February 1996. <br /> Y �Y <br />' This variation is reportedly typical for the entire region, and is believed to be a result of <br /> groundwater recharge of the unconfined aquifer, and reduced use of agricultural wells in the <br /> vicinity. <br /> This quarterly sampling event shows no detectable TPH as diesel concentrations in the <br />' groundwater at the site. This is the first quarter TPH as diesel was not detectable in any of <br /> the six wells <br /> IT <br /> recommends continued collection of depth to water measurements to observe variations in <br />' groundwater flow direction (if any). Additionally, IT recommends continued monitoring of <br /> groundwater for TPH as diesel in the monitoring wells to observe groundwater quality trends <br />' on the site location for three more consecutive quarters. Upon completion of this proposed <br /> sampling program, the site data will be reviewed to determine whether closure may be <br /> appropriate. A recommendation for closure may be made at that time, contingent upon <br />' sampling results <br /> MZ/07-22-96/VDBFr96-0016 db 4-1 <br />