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_ _die 2: Summary of Groundwater Analytical Data - Zone tt George's Service 1680 Durham Ferry Road Tracy. California Wells Date See Notes Benzene Toluene Ethyl Total TPH MTBE DIPE ETBE TAME TBA 1,2-DCA EDB Benzene Xylenes Gasoline ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L , ug/L ug/L OW-1 10/18/12 0.40 ND<0.5 ND<0.5 ND<1 55 0.66 0.79 11M8M6 01/22/13 1.6 ND<0.5 NO<0.5 NO<1 240 2.2 2.5 04/25/13 1.7 NO<0.5 NDe0.5 0.58 160 2.2 2.4 08/05/13 0.42 NO<0.5 NO<0.5 NDel 70 0.90 - 0.69 10/23/13 NO<0.5 NO<0.5 NO<0.5 NDel 74 0.89 -- 0.77 06/30/14 0.25 NO<0.5 NO<0.5 ND<1 21 1 0.93 09/10/14 NOc0.5 NO.<0.5 NO<0.5 Nilel 42 1.3 018 1V20M4 NI:7<M ND<0.5 NO41 NDel 54 2.4 - - 1.7 01/05M5 NO41 NO4.5 NO<0.5 NDel 36 2.3 1.9 04/08/15 NO<0.5 NO<0.5 NO<0.5 Neel 91 2.0 - _ 11 ()MOMS NO<0.5 NO<0.5 NO<0.5 Noel N0<50 ND<O1 NO<O1 0729M5 NO4.5 NO<0.5 NO<O1 Noel N0e50 ND<01 - NO<0.5 10/05M5 NDe0.5 NO<0.5 NO4.5 NDel 40 1.2 NO<0.5 01/08M6 NO<0.5 NO4.5 NO<0.5 Noel ND<50 ND<O1 - Na<01 04M9M6 NO<O1 NO<0.5 ND.<0.5 Noel ND<50 ND<O1 NO<0.5 08/01/16 Na<0.5 NO<0.5 NO<O1 NDel ND<50 NDe0.5 _ NO.<0.5 NO<0.5 NO<0.5 NO<0.5 NO<1 ND<50 NO<0.5 NO.<0.5 OW-2 10/18M2 Na<0.5 NO<0.5 NO<0.5 NO<1 NO<50 ND<01 NO<0.5 01/22/13 ND<0.5 NO.<0.5 NO<0.5 Noel ND<50 NDe0.5 NDe0.5 04/25/13 NO<0.5 NO<0.5 NO.<0.5 NDel ND<50 ND.<0.5 - NO<0.5 08/05/13 NO.0.5 NO<0.5 ND<0.5 Noel NDe50 ND<0.5 - ND<O1 10/23/13 NO<0.5 ND<0.5 NO.<0.5 Noel ND<50 NDe0.5 ND<01 06/30M4 NO<0.5 NO<O6 ND<O1 Noel NDe50 NDe0.5 - ND.<0.5 09M0M4 NDe0.5 Nae0.5 NO46 Noel NDe50 ND<O1 Na<0.5 11/20M4 N0<0.5 ND<O6 ND<O1 Noel NDe50 NO<0.5 NO4.5 01/05M5 Not Sampled 04/08M5 Not Sampled 07/29M5 Not Sampled 10/05M5 Not Sampled 01/07M6 Not Sampled. Too Short of a Water Column 04/20M6 Not Sampled - Too Short of a Water Column 08/01M6 Not Sampled - Too Short of a Water Column 11/07M6 Not Sampled Well was Dry NOTES: FP = Well not sampled because of floating gasoline on water table * = Sample results were not confirmed by EPA 8260 # _ MTBE Confirmation value by ENTCH Labs. ** = TEPH-Diesel, Kerosene, Dielectric and Motor Oils Analysis for of c's on 9/19/97 was performed by Sequoia Analytical using EPA 8260. ACRONYMS: ug/L = micrograms per liter TPH-G = Total petroleum hydrocarbons as gasoline MTBE = methyl tertiary butyl ether 1,2-0CA = 1,2 Dichloroethane DIPE = Diisopropyl ether ETBE = Ethyl tert-Butyl ether TAME = tert-Amyl Methyl ether TBA = tert-Butyl alcohol EDB = ethylene Dibromide Ground Zero Analysis, Inc. 9 of 9 8/16/2017