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T102 <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#14117 <br /> 2725 Country Club Boulevard <br /> Stockton CA <br /> f hM_ a ttb MBE ,2- Eth- Ace 10 5soly <br /> '8020 MTBE TBA t1f E ELBE TAME DCA -EDS' nr>I anal° tQne' Notes Q� m SP <br /> 7 „IAS <br /> m, - L IL L L JL !L IL 1L L IL m fee feet feet <br /> MW-7 <br /> 119 11/05/01 <0 5 <0 5 <0 5 <0 5 <50 — <5 <20 <5 <5 <5 <5 <5 — — 10 1020 000 -901 <br /> 153 01/08102 -- — — -- — — — -- — — — — — 09 — 000 — <br /> 04/12102 <0 5 <0 5 <06 <0 5 <50 <5 24 <5 <0 5 <0 5 <05 — — — 10 747 000 -594 <br /> <5 <0 5 <0 5 <0 5 1 1 7 90 0 00 -6 37 <br /> 07!09102 <0 5 <0 5 <0 5 <0 5 <50 <5 24 1 p 9 43 0 00 -7 90 <br /> 10/16102 <0 5 <0 5 <0 5 <05 <50 <5 052 15 <0 5 <05 <0 5 — — — <br /> 03/17/03 <0 50 <0 50 <0 50 <0 50 110 — 86 <5 0 <0 50 <0 50 <0 50 — — — 12 767 000 -614 <br /> <5 0 <0 50 <0 50 <0 50 1 4 794 0 00 -6 41 <br /> 05/29/03 <p 50 <0 50 <0 50 <0 50 <50 — 42 — -- — "' — <br /> 0 98 09118/03 <0 50 <0 50 <0 50 <0 50 160 36 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 23 954 000 -856 <br /> 12/02103 <0 50 <0 50 <0 50 <0 50 <50 — 1 7 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <5 0 — 0 1 909 000 -811 <br /> 03/03/04 <0 50 <0 50 <0 50 <0 50 <50 054 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 — — d 02 668 000 -570 <br /> i <br /> MW-8 <br /> 190 09118103 25 130 64 340 3,200 22 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <5 0 <8 0 C 08 1061 000 -871 <br /> 12/02/03 22 43 47 13 320 — 079 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <5 0 00 985 000 -795 <br /> 03/03/04 56 140 59 360 2,500 — 67 140 <0 50 <0 50 <0 50 <0 50 <0 50 — -- d 03 747 000 -557 <br /> i <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tet1-amyt-methyl ether TOC=Top of casing elevation in feet above mean sea level <br /> MtBE a Methyl-tert butyl ether 1 2-DCA=1 2-dicMoroethana pg[L=micrograms per Ider <br /> TBA=Tert-Butanol EDB=1 2-drbromoethane mg/L=milligrams per liter <br /> DIPE=Drisopropyl ether DTW=Depth to water —=Not sampled/no[measured <br /> ELBE=Ethyl it-butyl ether SPT=Separate-phase hydrocarbon thickness <br /> WfE=Water table elevation <br /> Notes <br /> Historical data prior to 03/17/03 sample date provided by Shaw E&I BTEX TPHg and MtBE analyzed using EPA Method 8020/8015 Modified <br /> Samples analyzed using EPA Method 82608 starting with 03117/03 sample date <br /> a=Method Blank Contamination The associated method blank contains the target analyte at a reportable level <br /> b=Matra SpikelMatnx Spike Duplicate for the analytes Benzene MtBE was affected by the analyte concentrations already present in the un spiked sample <br /> c=The Method Reporting Limit for Acetone has been increased due to the presence of an interfenng compound <br /> d=Matrix Spike/Matrix Spike Duplicate Results for the analyte MtBE were affected by the analyte concentrations already present in the un-spiked sample <br /> e=Hydrocarbons reporled as TPHg do not exhibit a typical Gasoline chromatographic patter <br /> 117 Elevenl7 11 Stores1141 MTablesN14117 04-10,IsHisloncal Water Page 6 of 6 <br />