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�■r :� Ir U■r r ilk � �Tab <br /> 4r <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 8260 TBA DIPS ETBE TAME Oxygen DTW SPT WTE <br /> (TOC) Date (pg1L) ° (pg/L) (pg/L) (pglL) (pg1L) (pg/L) (pg/L) (pg1L) (pg/L) (pg/L) (pg/L) (rngIL) (feet) (feet) (feet) <br /> MW-5 <br /> 2 57 02/77/99 85 <1 30 110 890 49 62 <20 <5 <5 <5 07 579 000 -322 <br /> 05/21/99 242 086 141 17 2 220 – 188 <20 <5 <5 <5 0 9 7 00 0 00 443 <br /> 08128/99 366—< <0 3 32.1 3.48 296 -- 64 <20 <5 <5 <5 08 670 000 -413 <br /> 11/24/99 214 129 1 142 149 257 259 281 <20 <5 <5 <5 1 1 750 000 -493 <br /> 02102/00- 29 6 <0 3 26.5- 063 284 35.3 751 <20 <5 <5 <5 11 650 000 -393 <br /> 05/16/00 <0 5 <0 5 099 <1 <100 – 160 <100 <4 <4 <4 06 637 000 -380 <br /> 08/08100 28 <0 5 44 22 <100 -- 160 <120 <5 <5 <5 04 735 000 -478 <br /> 11/15100 29 <0 5 36 28 170 – 59 <50 <2 <2 <2 06 675 000 -418 <br /> 02/07101 <0 5 <0 5 0 72' <1 5 _ <100 – 24 <50 <2 <2 <2 0 7 6 60 0 00 -4 03 <br /> 05/23/01 1 2 <05 <0 5 <1 <100 – 86 <50 <2EXPLANATION <br /> <2 <2 2 0 6 93 0 00 4 36 <br /> I <br /> TPHpetroleum hydrocarbons-as-gasoline SPT=Separate-phase hydrocarbon thickness E=Estimated result Result concentration exceeds the calibration range <br /> MTBE=Methyl-tert-butyl-ether WTE=Water table elevation <br /> TBA=Tert-Butanol vgIL=micrograms per liter <br /> DIPE=Di-isopropyl ether mg1L=Milligrams per Iter <br /> ETRE=Ethyl-terhary butyl ether —=Not available/not sampled <br /> TAME=Tertiary-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 <br /> 3 of 3 6-13-01 <br />