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Table 2. Monitoring Well Groundwater Chemical Data <br /> Sample Date GW TPHG Benz To] Ethyl Xyl TBA MTB DIPE ETBE TAME 12- EDB <br /> Elev * E DCA <br /> # ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/1 ug/l ug/l ug/l ug/I <br /> MW- Sept 2060 230 ND ND 19 072 <5 0 <5 0 <10 <5 0 <5 0 <1 0 <10 <br /> 3@ 12, <br /> 2000 <br /> Mw- Dec 2207 ND ND ND ND ND <5 0 <5 0 <10 <5 0 <5 0 <1 0 <1 0 <br /> 3@ 21 <br /> 2000 <br /> MW- Mar 2226 ND ND ND ND ND <5 0 <5 0 <10 <5 0 <5 0 <1 0 <10 <br /> 3@ 29, <br /> 2001 <br /> Blank ND ND ND ND ND 1 <5 0 1 <50 1 <10 1 <5 0 1 <5 0 1 <10 I <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 /> The results of monitoring Tracy Auto Stereo well show that contaminants were not <br /> detected TPHG observed in September was not detected in this sampling round Water <br /> levels in some wells which are attributed to natural aquifer recharge had risen about 0 2 <br /> feet <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 />