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• FOURTH QUARTER REPORT <br /> KWIKEE FOODS <br /> 2081.Country Club Boulevard <br /> Stockton, California- <br /> .January 5,2001 <br /> (EXECUTIVE SUMNLARV <br /> Groundwater monitoring took place on December 11 2000. The depth to groundwater was <br /> measured-with a water level meter after all seven wells were opened and allowed.to stabilize for <br /> approximately 15 minutes. A battery-operated purge pump was used to purge the wells of standing <br /> water, which was stored in DOT-approved drums on site. After purging, seven water samples were <br /> collected in glass vials and-transported to the laboratory, where .they were analyzed for Total <br /> Petroleum Hydrocarbons as gasoline,BTEX, and 5 gasoline oxygenates. <br /> The groundwater flow direction`is to the northwest, after being to the north or northeast during <br /> the previous quarter. In addition, whereas the gradient was not planar in the third quarter, a <br /> relatively planar gradient at 0.0028 ft/ft was mapped in December. This is the first time that we <br /> • have mapped a groundwater flow direction to the northwest. <br /> Hydrocarbon concentrations remained quite low or below detection limits during the quarter. As in <br /> the third quarter, concentrations are higher in two wells near the southwestern corner of the site, <br /> adding further support to our previous suggestion that a plume of contaminated groundwater is <br /> present southwest of the site. Groundwater monitoring since this investigation began in 1995 has <br /> usually indicated an eastward groundwater flow direction, which would not explain migration of a <br /> hydrocarbon plume to the southwest from Kwikee Foods. Rather, the present distribution of <br /> hydrocarbons suggests that the plume �originated off site to the southwest. Therefore, we <br /> recommend that San -Joaquin County Public Health Services Agency, Environmental Health <br /> Division review the data from both Kwikee Foods and the Chevron site.on the west side of Ftanktin <br /> Street to determine whether the latter site is the source of contamination at the Kwikee Foods <br /> property. If so, responsibility for further investigation at 2081 Country Club Boulevard should be <br /> transferred to the owners of the Chevron site. <br /> 1 <br />