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TA12 SUMMARY OF GROUNDWATER MEASUREMENTS AND ANALYTICAL RESULTS Farmer Property, Stockton, CA Page 5 of 5 (measured in teet (Re oiled in ug/1) Well ID Date Wellhead Depth to GW TPHg Benzene Toluene Ethyl Xylenes MTBE ETBE TBA DIPE TAME Lead Elevation Water Elevation Benzene CW 03/01/01 1450 2269 -819 <50 <0 5 <0 5 <0 5 <0 5 <5 0 NA NA NA NA NA CW 06/11/01 1450 2259 -809 <50 <0 5 <0 5 <0 5 <0 5 <2 0* <2 0 <20 <2 0 <2 0 NA CW 10/12/01 1450 2428 -978 <50 <0 5 <0 5 <0 5 <0 5 <2 5* <2 0 <20 <2 0 <2 0 NA CW 12131101** 1266 2415 -1149 <50 <0 5 <0 5 <0 5 <1 0 <2 0* <2 0 <20 <2 0 <2 0 NA AS1 01118102** 1183 2364 -1181 78,000 2,500 1,600 3,200 16,000 <25 <25 <250 <25 <25 NA AS2 01138102;` 1249 2267 -1018 130,000 7,600 8,900 3,000 16,000 <50 <50 <500 <50 <50 NA SB10-W 03/03/99 - - - 1,010 <0 500 <0 500 <0 500 <0 500 2 21* <2 00 <100 <2 00 <2 00 NA S1391-W 03/03/99 - - - 212 J <0 500 <0 500 <0 500 <0 500 <2 00* <2 00 <100 <2 00 <2 00 NA Notes Wellheads surveyed by a California Licensed well surveyor on March 15,2002 ugA denotes micrograms per liter or parts per billion <denotes not detected at or above Stated Method Detection Limit TPHg denotes Total Petroleum Hydrocarbons as gasoline, analyzed by EPA Method 5030/8015 MTBE denotes methyl tertiary butyl ether by EPA Method 8020 unless otherwise noted ETBE denotes ethyl tertiary butyl ether by EPA Method 8260 TBA denotes tertiary butyl ether by EPA Method 8260 DIPS denotes di-isopropyl ether by EPA Method 8260 TAME denotes tertiary amyl methyl ether by EPA Method 8260 CW denotes Canepa(adjacent property owner)Well located on Farmer property NA denotes not analyzed NS denotes not sampled *denotes MTBE analyzed by EPA Method 8260 **denotes sample was also analyzed for 1,2-dichloroethane and ethyl dibromide by EPA Method 8260, but was not detected W 162596\TAKMremaystGWTA132 XLS I