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' Table 1 <br /> Groundwater Elevations and Sample Analytical Results <br />' Former E-Z Serve Location No 100966 <br /> 2537 Waterloo Road, Stockton,California <br /> • Well No Sampling TOC DTW` GWEI PSH TPHg B T P X MTBE <br /> (screened interval) Date feet feet feet (feet) <br /> 5/31/02 2102 5210 -3108 000 <500 <0 50 <0 50 <0 50 <1 5 37 <br /> 8/20/02 2102 5808 -3706 000 <50 16 24 <0 50 17 37 <br /> 11/20/02 2102 5849 -3747 000 63 <0 5 <0 5 <0 5 <0 5 36 <br /> Notes latest analytical results above their respective laboratory detection limits are in boldface font No known groundwater <br /> monitoring or sampling was conducted between December 9,1994 and September 17, 1996 and November 6,2001 <br /> TOC =Top of casing referenced to City of Stockton Benchmark No 63 [elevation=20 87 feet above mean sea level] <br /> DTW =Depth to water measured from top of casing <br /> GWE =Groundwater elevation as referenced to benchmark in feet above mean sea level <br /> PSH =Phase Separate Hydrocarbon thickness <br /> TPHg =Total Petroleum Hydrocarbons as gasoline(EPA Method 8015) <br /> B =Benzene(EPA Method 602 or 8020/1) <br /> T =Toluene(EPA Method 602 or 8020/1) <br /> E =Ethylbenzene(EPA Method 602 or 8020/1) <br /> X =Total Xylenes(EPA Method 602 or 8020/1) <br /> MTBE=Methyl t-Butyl Ether(EPA Method 8020 or 8021) <br /> pg/L=Micrograms per liter(—parts per billion) <br /> (70'-90') =Well screen interval(in feet) <br /> <=Sample reported as"not detected,"in previous tables,reporting limit not known <br /> =1f PSH present,corrected GWE=TOC-Measured DTW+Corrected PSH <br /> Thickness(PSH Thickness x gas density[0 75 g/cc]) <br /> =MTBE analysis performed by EPA Method 8260 beginning on November 6,2001 <br /> =Not measured,surveyed,sampled,or analyzed <br /> 1 <br /> S IE ZServe11009661Reports1EZ956GWRo01 Page 5 of 5 <br />