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TgD _ <br /> Groundwater Monitoring D nd Analytical Results <br /> Chevron Service Station#9-6171 <br /> 6633 Pacific Avenue <br /> Vertical Measurements are to feet Stockton,California <br /> Analytical results are in parts per billion( b) <br /> Well Ground Depth <br /> DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylenes MTBE EDB DIESEL Oil TOG <br /> Elev Elev Water Gasoline Benzene <br /> MW-1 <br /> 01/09/87 - -- -- 990 32 47 43 <br /> 06/14/88 - - -- -- 10 <0 5 10 <0 5 <0 5 <br /> 12/05/89 -- -- -- Dry -- -- -- -- -- <br /> 03/11/90 <br /> -03/13190 - -- -- Dry - - - <br /> 09/05/90 - - -- Dry <br /> 11/29/90 -- Dry -- -- - - __ <br /> 03/14/91 - -- Dry <br /> 06/06/91 - -- -- Dry -- - <br /> 08/29/91 -- Dry <br /> 12/06/91 - - - Dry -- - <br /> 03/12/92 -- -- Dry -- -- <br /> 06/11/92 -- - Dry -- -- <br /> 09/03/92 -- -- Destroyed -- -- -- -- __ __ <br /> MW2 <br /> 09/05/90 1362 -4234 5596 -- <50 <0 5 <0 5 <0 5 <0 5 <0 2 <br /> 11/29/90 1362 -4260 5622 -- <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 03/14/91 1362 -4288 5650 <50 <05 <0 5 <0 5 <0 5 -- <br /> 06/06/91 1362 -4272 5634 -- <50 <05 <0 5 <0 5 <0 5 - <br /> 08/29/91 1362 -4335 5697 -- 400* <0 5 <0 5 <0 5 <0 5 <br /> 12/06/91 1362 -4322 5684 390** 9 0 11 2 5 11 -- <br /> 03/12/92 1362 -4096 5458 -- 650 63 66 7 2 49 -- <br /> 06/11/92 1362 -4233 55 95 -- 60 46 3 6 <0 5 6 7 -- <br /> 09/03/92 1362 -4352 5714 -- 480 100 21 <0 5 9 9 -- <br /> 12/17/92 1362 -4246 56 08 -- 330 110 1 5 2 3 22 <br /> 03/17/93 1362 -4062 5424 -- 520 160 04 0 7 8 0 - - <br /> 06/28/93 1362 -39 17 5279 -- 800 330 0 9 0 8 22 <br /> 06/28/93 1362 -- -- -- 480 <5 0 <5 0 46 -- -- <br /> 09/15/93 1362 -3973 5335 -- -- -- -- __ __ <br /> *Chromatogram pattern indicates an unidentified hydrocarbon <br /> **Chromatogram pattern indicates a gas and unidentified hydrocarbon <br /> 9-6171 xls/#385121 1 As of 05/22/00 <br />