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f• <br /> Table 2 Monitoring Well Groundwater Chemical Data <br /> Sample Date GW TPHG Benz Tol Ethyl Xyl TBA MTB DIPE ETBE TAME 12- EDB <br /> Elev * E DCA <br /> ft <br /> # ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l <br /> MW- Sept 2060 230 ND ND 19 072 <5 0 <5 0 <10 <5 0 <5 0 <l 0 <1 0 <br /> 3@ 12, <br /> 2000 <br /> Mw- Dec 2207 ND ND ND ND ND <5 0 <5 0 <10 <5 0 <5 0 <10 <1 0 <br /> u <br /> 3 21, <br /> 2000 <br /> Blank ND ND ND ND ND <5 0 <5 0 <10 <5 0 <5 0 <1 0 <1 0 <br /> #-See laboratory reports GW Elev -Groundwater elevation in feet <br /> @ - The sample was inadvertently marked "MW-3" however the Wright Tracy Auto Stereo monitoring well <br /> designation is MW-1 <br /> * -Hydrocarbon reported in the gasoline range does not match the gasoline standard <br /> Discussion <br /> Contaminants were not detected in this sampling round, a decline from the previous <br /> sampling TPHG observed in September was not detected in this sampling round Water <br /> levels had risen about 1 5 feet in some wells, which are attributed to winter precipitation <br /> aquifer recharge <br /> Conclusions and Recommendations <br /> Wright sampled the Tracy Auto Stereo monitoring well, and contaminants were not <br /> detected The analytical data show that TPHG had declined to none detected since <br /> September The PHS-EHD stated in their letter dated December 27, 2000 that if the <br /> water sample results of this quarter were similar to September, a closure report should be <br /> prepared for the site <br /> Since the results showed no contaminants are present, Wright will begin the preparation <br /> of a site closure report using the guidance outlined in the PHS-EHD letter <br /> Page 3 <br />