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Table 1 <br /> GROUNDWATER ELEVATIONS AND SAMPLE ANALYTICAL RESULTS <br /> Conrady Service Station <br /> • 1002 North Yosemite Street <br /> Stockton,California <br /> Sample Collection TOC DTW GWE TPHg B T E X MTBE <br /> No Date (feet) (feet) (feet) (ppb) ( b) (ppb) (ppb) (ppb) (ppb) <br /> MW4 9/15/94 9707 2895 6812 --- — --- ___ <br /> 9/27/94 9707 2912 6795 ND<50 65 ND<0 5 ND<0 5 ND<15 --- <br /> 12/28/94(a) 9707 2906 6801 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<1 0 --- <br /> 3/8/95 9707 2678 7029 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<1 0 --- <br /> 6/30/95 9707 2361 7346 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 --- <br /> 9/27/95 9706 2429 7277 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- <br /> 11/30/95 9706 2421 7285 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 --- <br /> 2/27/96 9706 2125 7581 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 ND<50 <br /> 5/30/96 9706 1986 7720 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 ND<50 <br /> 8/20/96 9706 2066 7640 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 ND<5 0 <br /> MW-5 9/15/94 9644 2848 6796 -- --- — __ <br /> 9/27/94 9644 2863 6781 ND<310 140 ND<6 3 51 ND<6 3 --- <br /> 12/28/94(a) 9644 2871 6773 420 17 20 13 19 --- <br /> 3/8/95 9644 2675 6969 3,400 40 13 130 41 --- <br /> 6/30/95 9644 2290 7354 12,000 110 14 950 2,300 --- <br /> 9/27/95 9643 2371 7272 1,700 56 20 260 92 --- <br /> 11/30/95 9643 2345 7298 670 47 07 93 ND<2 0 --- <br /> 2/27/96 9643 2068 7575 300 16 07 14 ND<2 0 ND<50 <br /> 5/30/96 9643 1929 7714 540 96 10 22 ND<2 0 ND<50 <br /> 8/20/96 9643 2004 7639 170 77 05 ND<0 5 ND<2 0 12 <br /> MW-6 9/27/95 9642 2382 7260 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 --- <br /> 11/30/95 9642 2357 7285 <br /> 2/27/96 9642 2084 7558 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 ND<50 <br /> 5/30/96 9642 1943 7699 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 0 ND<50 <br /> 8/20/96 9642 2014 7628 ND<50 05 ND<0 5 ND<0 5 ND<2 0 9 <br /> Notes, <br /> TOC Top of casing referenced to temporary benchmark(project datum=100') <br /> DTW Depth to water <br /> GWE Groundwater elevation(TOC-DTW) <br /> TPHg Total petroleum hydrocarbons as gasoline by EPA Method 8015 (modified) <br /> BTEX Benzene,toluene,ethylbenzene and total xylenes by EPA Method 8020 <br /> MTBE Methyl tert-butyl ether by EPA Method 8020 <br /> ND Not detected,method detection limit not available <br /> ND<50 Not detected in concentrations exceeding the indicated method detection or reporting limit <br /> — Not tested <br /> i <br /> ppb Parts per billion <br /> (a) Date of groundwater gauging Groundwater resampled 1/4/95 <br /> 0 <br /> Page 2 of 2 <br />