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i <br /> I ? L&b9mtmSamj& alvei- <br /> The water samples were analyzed using U S Environmental Protection Agency(U S EPA)Test <br /> Method 8260B for benzene, toluene,ethylbenzene, xylene,TPH-gasolme, and 5 oxygenate <br /> compounds In addition,the lead scavenger compounds 1,2•Dichloroediane(1,2-DCA)and <br /> 1,2•Dibromoethane(1,2-DCB)were also analyzed Copies of the analytical laboratory reports <br /> (Kiff 942632)and chain of custody documentation are attached to this report(Appenchx 3)and <br /> the results tabulated in the attached"fables 3 and 4 <br /> 3 <br /> LOW GOURt fir firadient <br /> The groundwater surface depths from the six monitoring wells were plotted and contoured <br /> showing lines of equal groundwater elevation surface The attached Figure 5 shows the <br /> I groundwater elevation contours that are present around these wells The estimated groundwater <br /> gradient from all of the wells is also depicted on the attached map <br /> The wells all suggest a gentle slope of the groundwater surface to the southwest in a direction of <br /> rabout S20W and away from the Mokelumne River at a gradient of approximately 0 001 or <br /> approximately 5 feet per mule This gradient and direction of flow are consistent with previous <br /> groundwater gradients present at this site <br /> I <br />' Mom\n�Em "=Tnarrw=o+xxpmu\QMxo331os,va 5 <br />