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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 WellDepth to Groundwater <br /> Date TPH-G Benzene Toluene benzene Xylenes MTBE CO2 Elevation Groundwater Elevation <br /> Sampled (ug/L) (ug/L) (uglL) (ug(L) (uRlL) (uglL) (tnglL) (ft above MSL) (feet) (ft above MSL) <br /> Well MW-10 <br /> I, 08723101 <50 <D.5 40.5 <0.5 m.5 <$ NR 3.16 9.97 -6.81 <br /> 1InolOI <5D <L0 <1.0 <10 V.0 <0.50 NR 10.50 -7.34 <br /> 02/27/02 <50 <0.50 <0,50 <0.50 <I.0 <0.50 NR 9.58 -6,42 <br /> 05131/02 <50 <0.50 <D.50 <0.50 <I.0 <0.50 NR 9.56 -6.40 <br /> 08730/02 <50 <0.50 <0.50 <0.50 <1.0 x.50 NR 10,51 <br /> 11719102 <50 <0.50 <0,50 a0.50 <1.0 <0.50 NR 10,90 -7.74 <br /> 03/06/03 <50 <0.50 <0.50 <O.50 ❑.0 0,60 NR 10.56 -7.40 <br /> 05728/03 <50 <0.50 <0,50 <0.50 <1.0 0.96 NR 10.38 -7.22 <br /> i' 09/11/03 <50 <0.50 <0.50 <50 <1.0 0.68 NR 11.07 -7.91 <br /> 01/30/04 <50 <0.50 <0,50 <0.50 <1.0 3,10 NR 10.56 -7.40 <br /> 03730/04 NR NR NR NR NR 3.40 NR 10.07 -6.91 <br /> 06/17/04 NR NR NR NR NR 1.70 NR 10,34 -7.18 <br /> 0913UAA NR NR NR NR NR 0.80 NR 11.1 -7.94 <br /> 12114104 NR NR NR NR NR 0.63 NR 11.91 -8.75 <br /> Notes: <br /> In Bold denotes results from recent sampling event <br /> 1WellMW-B 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-10 were installed on August 7,2001 and surveyed by Morrow Surveying on August 2.9,2001 <br /> PH-G denotes total petroleum hydrocarbons as gasoline <br /> MTBE denotes methyl-tent-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 /> ug1L denotes micrograms per liter. mglL denotes milligrams per liter <br /> <denotes not detected above listed detection limit for the method <br /> ft denotes feet <br /> MSL denotes mean sea level <br /> CO2 denotes carbon dioxide <br /> *Due to construction activities,the well MW-8 elevation has been changed,but the well could not be resurveyed prior to this monitoring event. <br /> •'Because MW-8 needs to be resurveyed,the groundwater elevation for MW-8 could not be determined. <br /> """M W-B 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 /> ^^Sample contains descrele peak in gasoline range <br /> ^^^Quantity of unknown hydrocarbon(s)in sample based on gasoline. <br /> I <br /> 1 <br /> Page 10 of 10 <br />