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� � y <br /> Groundwater MonitoriTng ata1 and Analytical Results <br /> Chevron Service Station#9-2033 <br /> 508 West Charter Way <br /> Vertical Measurements are in feet Stockton,California Analytical results are in parts per billion(ppb) <br /> Well Ground Depth Total <br /> DATE Head Water To Notes TPH- TPH- Benzene Toluene Ethyl- Xylenes MTBE EPA 1,2-DCA Phenol Oil & Cr Cd Pb Ni Zn <br /> Elev Elev Water Diesel Gasoline Benzene 8270 Grease <br /> MW-1 (cont) -- <br /> 05/25/99 1038 -874 19 12 140* <50 <0 5 <0 5 <0 5 <0 5 210 <5 0-<50 2 9 <50 <1000 <10 <10 <20 10 140 <br /> 08/18/99 1038 -9 81 2019 -- 359 198 115 638 9 11 18 2 1560 -- 141 -- <5000 <10 <10 <100 <50 113 <br /> 08/27/99 1038 -10 13 2051 -- ^^ -- -- -- -- -- -- <5 0-<10 -- <5 0 -- -- -- -- -- -- <br /> 05131100° 1038 .859 1897 -- 170' <50 <0 50 <0 50 <0 50 <0 50 220 <5 0-<103 -- <5 0 <5,000 <10 0 <10 <20 0 <10 0 360 <br /> *Chromatogram pattern indicates an unidentified hydrocarbon <br /> ^^Due to laboratory error,TPH-Diesel was not analyzed <br /> MW-2 <br /> 03/23/95 926 -2370 3296 - -- -- -- -- -- -- " <br /> 05/26/95 9 26 -21 10 3036 -- - <50 <0 5 <0 5 <0 5 <0 5 - <0 5 - <br /> 08/15/95 9 26 -21 37 3063 -- <50 <0 5 <0 5 <0 5 <0 5 -- - <0 5 -- - <br /> 11/16/95 926 -21 50 3076 - <50 <0 5 <0 5 <0 5 <0 5 - -- -- <br /> 02/27/96 926 -1906 28 32 - -- <50 <0 5 <0 5 <0 5 <0 5 - - - <br /> 05/15/96 926 -17 57 2683 -- - <50 <0 5 <0 5 <0 5 <0 5 <2 5 <br /> 08/22/96 9 26 -1775 27 01 -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 - <br /> 11/25/96 926 -- -- Inaccessible -- -- -- - - - <br /> 05/19197 926 -- -- Inaccessible -- -- - - -- - - - <br /> 08/21/97 926 -1459 2385 -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 - <br /> 11/17/97 9 26 -15 67 2493 -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 -11117197 9 26 -15 67 2493 EPA 8260++ -- -- -- -- -- -- <2 0 <br /> 02/09/98 926 -13 12 2238 -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 - - <br /> 05/21/98 926 -9 35 18 61 -- -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 - - <br /> 05/21/98 926 -9 35 1861 EPA 8260++ -- -- -- -- -- -- <2 0 -- <br /> 08/11/98 926 -957 18 83 -- -- 2700 390 26 46 69 <5 0 - -11/09/98 9 26 -1022 1948 - -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 -- - - <br /> I <br /> ++Ethanol,TBA,RIPE,TAME and ETBE by EPA 8260 were not detected,see lab report for detection limits <br /> 9 2033 xlsl#386847 2 As of 05131/00 <br />