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i TableT First Quarter 2003 Groundwater Monitoring and Analytical Data 7-Eleven Store#19976 1399 North Main Street Manteca,CA Well ID/ Ethyl- Dissolved Elevation Date Benzene Toluene Benzene xylene TPWg MtBE TBA DIPS ETBE TAME Notes Oxygen DTW SPT WTE (TOC) (E+9/L) ) ) W9 449 omp 04L) ) I feet) I.-Ifeet)-lAteet) MW-1 03/11/03 47 <1 0 39 30 180 390 96 <1 0 <1 0 12 N/A 31 1977 000 1222 3199 MW-1A 03/11/03 13 053 <0 50 <0 50 <50 19 <5 0 <0 50 <0 50 <0 50 NIA 84 2002 000 1207 3209 MW-2 03/11/03 3,600 1,800 2,400 8,700 54,000 2,900 1,700 <20 <20 <20 N/A 1 3 1901 000 1219 31 20 MW-3 03/11/03 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <5 0 <0 50 <0 50 <0 50 N/A 26 1964 000 1223 3187 MW-4 03/11/03 <0 50 <0 50 <0 50 <0 50 <50 <0 501 <5 0 <0 50 <0 50 <0 50 N/A 93 2042 000 12 31 3273 MW-4A 03/11/03 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <5 0 <0 50 <0 50 <0 50 N/A 25 2026 000 1222 3248 MW-5 03/11/03 <0 50 <0 50 <0 50 <0 50 <50 072 <5 0 <0 50 <0 50 <0 50 N/A 35 1941 000 1247 31 88 MW-5A 03/11/03 088 <0 50 47 <0 50 100 250 61 <0 50 057 <0 50 N/A 01 1976 000 11 72 31 48 MW-603/11/03 <0 50 <0 50 <0 50 <0 50 120 <0 50 <5 0 <0 50 <0 50 <0 50 N/A 01 21 47 000 1218 33 65 MW-7 03/11/03 <0 50 <0 50 <0 50 <0 50 <50 1 1 <5 0 <0 50 <0 50 <0 50 N/A 38 2038 000 1207 32451 Explanation TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tert-amyl-methyl ether ug/L=micrograms per liter MtBE=Methyl tert butyl ether DTW=Depth to water mg/L=milligrams per liter TBA=Tert-butanol SPT=Separate-phase hydrocarbon thickness ft=feet DIPE=Dusoprophyl ether WTE=Water table elevation --=Not sampled/not measured ELBE=Ethyl-tert-butyl ether TQC=Top of casing elevation in feet above mean sea level N/A=Not Applicable Note All samples analyzed using EPA Method 82608 7 Elevenl7-11 Store1140631Tables119976 03-10 As Page 1 of 1