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TABLE 1 1 1 CUMULATIVE RESULTS OF GROUNDWATER SAMPLING AND ANALYSES QUIK STOP MARKET NO. 132 3 Z955 WEST HAMMER LANE STOCKTON,CALIFORNIA 11 Ethyl- Total Well Depth to Groundwater Date TPIi-G Benzene Toluene benzene Xylenes MTBE CO2 Elevation Groundwater Elevation Sampled (ug(L) (ug/L) (ug/L) OWL) (ug/L) (ug/L) {mglL) (ft above MSL) (feet) (ft above MSL) Well MW-9 48/23/01 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 3.15 9,70 -6.55 t 11/30/01 <50 <1.0 <1.0 <1.0 <1.0 <0.50 NR 10.46 -7.31 02/27/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 9.54 -6.39 05/31/02 <50 <0,50 <0.50 <0.50 <1.0 <0.50 NR 9.55 -6.40 Well MW-9(Cont d) 08/30/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 10.53 -7.38 11/19/02 <50 <0.50 1.1 <0.50 1.7 1.1 NR 10.89 -7.74 03/06/03 <50 <0.50 <0.50 <0.50 <1,0 0.97 NR 10.57 -7.42 �1 05/28/03 <50 <0.50 <0.50 <0.50 <1.0 1.4 NR 10.40 -7.25 r 09/11/03 <50 <0.50 <0.50 <0.50 <1.0 4.8 NR 11.05 -7.90 WeII MW--10 08/23101 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 3.16 9.97 -6.81 11/30/01 <50 <1.0 <1.0 <L0 <L0 <0.50 NR 10.50 -7.34 02/27/02 <50 <030 <0.50 <0.50 <1.0 <0,50 NR 9.58 -6.42 �j 05/31/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 9.56 -6.40 08/34102 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 10.51 -7.35 11/19142 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 10.90 -7.74 03106!43 <50 10.50 <0.50 <0.50 <L0 0.60 NR 10.56 -7.40 05/28143 <50 <0.50 <0.50 <0.50 <I.0 0.96 NR 10.38- -7.22- 09/11/03 7.22-09/11/03 <50 <0.50 <0.50 <0.50 I <1.0 0.68 NR 11.07 -7.91 Notes: Well MW-8 was installed an 11-19-99 and surveyed by Siegfried Engineering Inc.on 12-9-99;MW-2,MW-5,and MW-6 were also surveyed, Wells MW-9 and MW-10 were installed on August 7,2001 and surveyed by Morrow Surveying on August 29,2001 TPH-G denotes total petroleum hydrocarbons as gasoline 1'' MTBE denotes methyl-tert-butyl ether;from 12-3-98 MTBE analyses were performed by EPA Method 8260 NR denotes analysis not requested. NA denotes not available ug/L denotes micrograms per filer. mg/L denotes milligrams per liter <denotes not detected above listed detection limit for the method ft denotes feet MSL denotes mean sea level CO2 denotes carbon dioxide l 1 *Due to construction activities,the well MW-8 elevation has been changed,but the well could not be resurveyed prior to this monitoring event. **Because MW-8 needs to be resurveyed,the groundwater elevation for MW-8 could not be determined. •**MW-8 was recently paved over by the City of Stockton preventing access to it. ATC was unable to collect a sample from this well and the groundwater elevation could not be calculated for well MW-8 this quarter ^Hydrocarbon reported in the gasoline range does not match the gasoline standard i �+ 3:lpmjmU%Quik Smp(62503M 132(=13 Tsb1vA3NQu2003Ul1sWAW Page 10 of 10