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Table 1 I First Quarter 2005 Groundwater Monitoring and Analytical Data 7-Eleven Store#14117 2725 Country Club Boulevard Stockton,CA Well IDI Ethyl- 1,2- Dissolved Elevation Date Benzene Toluene Benzene Xylene TPHg MtBE TBA RIPE ETRE TAME DCA EDB Notes Oxygen DTW SPT WTE (TOC) (vg�L) EN9jt} (N9�-) f4�9fE) I4r�t] (jig/L) (ttg/L) (U�) (pg/L) (p L) flig/E} (pgfL) f�9f�} (feet) (feet) (feet) MW-1 01/28/05 <0 50 <0 50 <0 50 <050 <50 073 2,000 <0 50 <0 50 <0 50 <0 50 <0 50 03 814 000 -690 1 24 MW-2 01/28/05 760 29 15 57 3,200 150 1,700 <0 50 <0 50 <0 50 <0 50 <0 50 02 752 000 -684 068 MW-3 01/28/05 16 16 200 480 5,100 <0 90 <5 0 <0 90 <0 90 <0 90 <0 90 <0 90 '02 7 17 boo -669 108 MW-4 01/28/05 16 0 85 32 81 1,300 32 380 <0 50 <0 50 <0 50 <0 50 <0 50 02 790 000 -702 088. MW-5 01/28/05 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 d 06 713 000 -572 141 MW-6 01128/05 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 d 11 799 000 -617 1 12 MW-7 01/28/05 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 d 09 768 000 -670 098 MW-8 01/28/05 10 12 1 <0 50 0 75 <50 42 1 <5 0 <0 50 <0501 <060 <050 <0501 07 883 000 -693 1 90 Explanation TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tert-amyl-methyl ether WTE=Water table elevation MTBE=Methyl-tert-butyl ether 1,2-DCA=1,2-dichloroethane TOC=Top of casing elevation�n feet above mean sea Level TBA=Terl-Butanol EDB=1,2-dibromoethane pg/L=micrograms per liter DIPE=Dnsopropyl ether DTW=Depth to water mg1L=milligrams per liter EtBE=Ethyl-tert-butyl ether SPT=Separate-phase hydrocarbon thickness Note Samples analyzed by EPA Method 82608 d=Matrix Spike/Matrix Spike Duplicate Results for the analyte MtBE were affected by the analyte concentrations already present in the un-spiked sample 7-Elevenl7-11 Store1140631Tables114117 Current Groundwater As Page 1 of 1 i