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umb m m m m m <br /> T 2 <br /> Historical Groundwater Monitoring Data <br /> 7-Eleven Store No 20632 <br /> 4627 DaVlncl Drive <br /> Stockton,California <br /> Well IDI _ - = Ethyl- MTBE MTBE Dissolved <br /> Elevation Benzene Toluene Benzene Xylene TPH-G 8020 8x60 TBA DIPE ETBE.~ TAME, -OX- n E �DTW SPT , ,WTE <br /> Date � �t (eet (feet)� # � LgLNgLIr " ,� <br /> MW-6 <br /> 2 57 02117199 85 <1 30 110 890 49 62 <20 <5 <5 <5 07 5,749r- A 00: - -322 <br /> 05/21/99 242 086 141 172 220 — 188 <20 <5 <5 <5 09 700 000 -443 <br /> 08/28/99 36.6 <0 3 321 348 296 — 64 <20 <5 <5 <5 08 670 000 -413 <br /> 11/24/99 214 129 142 149 257 269 281 <20 <5 <5 <5 1 1 750 000 -493 <br /> 02.102100 _ 29.6 <0 3 26.5 0.63 284 353 75.1 <M <5 1<5 a <5 '131 6�k%, 0 00E�11 -3,93 <br /> 05/16/00 <0 5 <0 5 099 <1 <100 I — 160 <100 <4 <4 <4 06 637 1 000 -380 <br /> 0$108100 28 <0 5 44 22 <100 -- 160 <120 <5, '<5,, 6 <5 04 a -T351 g,0'00= '4 78 <br /> 11/15/00 29 <0 5 36 28 170 — 59 <50 <2 <2 <2 06 675 1 000 -418 <br /> 02107101 <0 5 <0 5 0 72* <1 5 �1o0 — 24 <50 <2 �2 <2` 0.7 x,6'6%L 7.,0,00,,N 403 <br /> 05/23/01 12 <0 5 <0 5 <1 <100 — 86 <50 <2 <2 <2 20 693 000 -4 36 <br /> 08121101_ <0 5 <0 5 Q,67 1 <100 -- 26 <50 <2, . <2 < 01= _-�-T57 0'00 5 00 <br /> EXPLANATION <br /> TPH-G=Total petroleum hydrocarbons as-gasoline SPT=Separate-phase hydrocarbon thickness E=Estimated result Result concentration exceeds the calibration range <br /> MTBE=Methyl tert-butykether WTE=Water table elevation G=Elevated reporting limit The reporbng limit is elevated due to matnx interference <br /> TBA=Tert-Butanol pg/L=micrograms per lder <br /> DIPE=Di-isopropyl ether mg/L=Milligrams per liter <br /> ETBE=Ethyl-tertiary-butyl-ether —=Not avatlablelnot sampled <br /> TAME=Tertiery-amyl-methyl ether TOC=Top of casing elevation(in feet above mean sea level) <br /> DTW=Depth to water Method Blank Contamination Method blank contains target analyte at a reportable level <br /> 7-11120632_tbl As 3 of 3 9-10-01 <br />