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Ultramar No 13792 May 17,2004 <br /> Stockton California uarterl Groundwater Monrtorin Re ort <br /> R� <br /> Results of Groundwater Monitoring <br /> Depth-to-groundwater measurements were subtracted from the surveyed TOC elevations to <br /> calculate groundwater elevations Groundwater elevation data, summarized in Table 1, were <br /> used to construct a groundwater contour map (Figure 2) Groundwater elevation data indicate <br /> flow was generally eastward under a gradient of approximately 0 004 <br /> Analytical data are summarized in Table 1 Benzene concentration data were used to <br /> construct a benzene isoconcentration map (Figure 3) The analytical report is contained in <br /> Attachment C <br /> GeoTracker Electronic Data Deliverables <br /> The analytical and groundwater well measurement (GEO_WELL) electronic data deliverable <br /> (EDD) files have not been uploaded because the site has not yet been approved by <br /> GeoTracker <br /> Distribution <br /> A copy of this report should be forwarded to <br /> Mr Jeff Wong <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202-2708 <br /> Mr Marty Hartzell <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, California 95670 <br /> Sayed and Zakia Adelwahed <br /> P O Box 182 <br /> Stockton, California 95201 <br /> 1i <br /> 792gmrQ 104 doc <br /> Project No 1792 41 2 HORIZON ENVIRONMENTAL INC <br />