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TABLE 1 <br /> ' CUMULATIVE RESULTS OF GROUNDWATER SAMPLING AND ANALYSES <br /> QUIK STOP MARKET NO. 132 <br /> 3555 WEST HAMMER LANE <br /> STOCKTON,CALIFORNIA <br /> Ethyl- Total Well Depth to Groundwater <br /> Date TPH-G Benzene Toluene benzene Xylenes MTBE CO2 Elevation Groundwater Elevation <br /> Sampled (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (mglL) (ft above MSL) (feet) (ft above MSL) <br /> Well MW-9(Cont d) <br /> 08/30102 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 10.53 -7,38 <br /> 11/19/02 <50 <0.50 1.1 <0.50 l.7 1.1 NR 10.89 -7.74 <br /> 03/06103 <50 <0.50 <0.50 <0.50 <1.0 0.97 NR 10.57 -7.42 <br /> 05/28/03 <50 <0.50 <0.50 <0.50 <1.0 IA NR 10.40 -7.25 <br /> 09/11103 <50 <0.50 <0.50 <0.50 <1.0 4.8 NR 11.05 -7.9D <br /> ' 01/30/04 <50 <0.50 <0.50 <0,50 <I.0 3.9 NR 10.56 -7.41 <br /> Well MW-10 <br /> 08/23101 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 3.16 9.97 -6.81 <br /> ' 11/30/01 <50 <1.0 <1.0 <1.0 <1.0 <0.50 NR 10.50 -7.34 <br /> 02/27/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 9.58 -6A2 <br /> 05/31/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 9.56 -6.40 <br /> ' 08/30/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 10.51 -7.35 <br /> 11/19/02 <50 <0.50 <0.50 <0.50 <1.0 <0.50 NR 10.90 -7.74 <br /> 03/06/03 <50 <0.50 <0.50 <0.50 <1.0 0.60 NR 10.56 -7.40 <br /> 05/28/03 <50 <0.50 <0.50 <0.50 <1.0 0.96 NR 10.38 -7.22 <br /> 09/11/03 <50 <0.50 <0.50 <0.50 <1.0 0.68 NR 11.07 -7.91 <br /> 01/30/04 <50 <0.50 <0.50 1 <0.50 <1.0 3.1 NR 10.56 -7.40 <br /> Notes: <br /> Well MW-8 was installed on 11-19-99 and surveyed by Siegfried Engineering Inc.on 12-9-99;MW-2,MW-5,and MW-6 were also surveyed. <br /> Wells MW-9 and MW-1 0 were installed on August 7,2001 and surveyed by Morrow Surveying on August 29,2001 <br /> PH-G denotes total petroleum hydrocarbons as gasoline <br /> ' MTBE denotes methyl-tert-butyl ether,from 12-3-98 MTBE analyses were performed by EPA Method 8260 <br /> NR denotes analysis not requested. NA denotes not available <br /> ug/L denotes micrograms per liter. mg/L denotes milligrams per liter <br /> <denotes not detected above listed detection limit for the method <br /> ' R denotes feet <br /> MSL denotes mean sea level <br /> CO,denotes carbon dioxide <br /> Due to construction activities,the welt MW-8 elevation has been changed,but the well could not be resurveyed prior to this monitoring event <br /> **Because MW-9 needs to be resurveyed,the groundwater elevation for MW-8 could not be determined. <br /> ***M W-8 was recently paved over by the City of Stockton preventing access to it. ATC was unable to collect a sample from this well <br /> and the groundwater elevation could not be calculated for well MW-8 this quarter <br /> ' ^Hydrocarbon reported in the gasoline range does not match the gasoline standard <br /> i <br /> ' r,Wrajn ,QA swo(C",),QS 111 Page 10 of 10 <br />