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' Table 3 <br /> • Historical 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 GWEt PSH TPI-Ig B T E X MTBE <br /> screened Interval Date feet (feet) (feet) feet ( ( L /L L <br /> VW-1 6/20197 2059 -- -- -- -- -- -- -- -- <br /> (69'-79') 11/19/97 2059 5786 -3727 000 72,000 28,000 5,200 800 5,000 <5 0 <br /> 6/7/01 2059 4811 -2752 000 8,100 3,700 75 140 250 <250 <br /> 11/6/01 2059 55 17 -3458 000 10,000 3,800 87 130 410 <1,000 <br /> 1/29102 2059 5146 -3087 000 1,100 700 74 270 286 54 <br />' 5/31/02 2059 5166 -31 07 000 5,000 6,800 52 180 1,330 1 200 <br /> 8/20/02 2059 5756 -3697 000 7,200 4,900 89 230 650 280 <br /> 11/20/02 2059 58 11 -3752 000 16,000 8,300 <100 280 1,000 430 <br /> 1/16/03 2059 5523 -3464 000 28,000 8,800 850 150 2,200 250 <br /> VW-2 6120197 2085 5250 -31 65 000 -- -- -- -- -- <br /> (55'-65') 11/19/97 2085 5827 -3742 000 70,000 27,000 100 700 3,300 < <br /> 6/7/01 2085 4859 -2774 000 570 71 1 5 28 57 <br /> —71/'6/07 2085 5565 -3480 000 1,100 35 1 8 22 32 87 <br /> 1/29/02 2085 51 83 -3098 000 <500 14 24 46 13 1 75 <br /> 5/31/02 2085 5200 -31 15 0 00 <500 11 081 054 14 100 <br /> 8/20/02 2085 5802 -37 17 000 360 22 26 3 3 41 94 <br /> 11/20/02 2085 5846 -3761 000 530 3 3 <0 5 <0 5 1 3 160 <br /> 1116103 2085 5559 -3474 000 310 1 7 <0 5 <0 5 <0 5 130 <br /> VW-3 11/19/97 21 02 58 13 -37 11 000 110 22 1 5 < 41 91 <br /> (55'-65') 6/7/01 21 02 4848 -2746 000 71 <0 5 072 <0 5 <0 5 <5 <br /> 11/6/01 21 02 5553 -3451 000 72 <0 30 <0 30 <0 30 <0 60 <10 <br />' 1/29/02 21 02 51 91 -3089 000 <500 <0 5 <0 5 <0 5 <1 5 34 <br /> 5131/02 21 02 5210 -31 08 000 <500 <0 50 1 <0 50 <0 50 <1 5 3 7 <br /> 8/20102 21 02 5808 -37 06 000 <50 16 24 <0 50 1 7 37 <br /> 11/20/02 21 02 5849 -3747 000 63 <0 5 <0 5 <0 5 <0 5 36 <br /> 1/16103 2102 5564 -3462 1 000 140 77 32 1 14 91 4 8 <br /> (Votes Latest analytical results above their respective laboratory detection units 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 80 15) <br /> B =Benzene(EPA Method 602 or 8020/1) <br /> T =Toluene(EPA Method 602 or 802011) <br /> ' E =Ethylbenzene(EPA Method 602 or 802011) <br /> X =Total Xylenes(EPA Method 602 or 8020/1) <br /> MTBE=Methyl t-Butyl Ether(EPA Method 8020 or 802 1) <br /> µg/l-=Micrograms per liter(—parts per billion) <br /> ' (70'-90') =Well screen interval(m feet) <br /> <=Sample reported as"not detected,"to previous tables,reporting hrmt not known <br /> ' =if PSH present,corrected GWE=TOC-Measured DTW+Corrected PSH <br /> Thickness(PSH Thickness x gas density[0 75 g/cc]) <br /> ' 2 =MTBE analysts performed by EPA Method 8260 beginning on November 6,2001 <br /> =Not measured,surveyed,sampled,or analyzed <br /> • <br /> ' 6of6 <br />