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4 <br /> Table 1 *Iof i <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#4932 <br /> 16 East Harding Way,Stockton CA <br /> Well Depth Groundwater Ethyl <br /> Weil Date Elevation to Water Elevation TPH-G Benzene Toluene benzene Xylenes MtBE DO <br /> Name Sampled (feet,MSL) (feet,TOC) (test,MSL) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mgA) <br /> MW-1 9/5/2000 P 1241 2713 -1472 1,470 128 732 512 254 268" NM <br /> 11/2/2000 P 2776 -1535 1,040 138 680 188 101 3861280' 30 <br /> MW-2 9/5/2000 P 1311 2760 -1449 1,330 394 194 343 104 1420` NM <br /> 11/2/2000 P 2829 -1518 10,700 169 <25 0 1,930 230 4,02013,900" 26 <br /> MW-3 9/5/2000 P 1170 2713 -1543 499 294 <0 50 <0 50 155 5 62` NM <br /> 11/2/2000 P 2841 -1471 116 655 <0 500 <0 500 142 <2 50129' 17 <br /> MW-4 9/5/2000 P 1198 2663 -1465 166,000 10,500 43,600 5,230 25,400 708 000 NM <br /> 11/W000 P 27.32 -1534 180,000 9,400 42,600 5,260 26,900 376,0001350,000* 33 <br /> SVE-1 9/5/2000 P 1184 2645 -1447 66,600 1,770 8,000 2,550 12,900 1 140` NM <br /> 11/212000 P -1527 2725 4,750 152 469 164 823 21211,200' 28 <br /> Note <br /> TOC =Top at Casing <br /> MSL =Mean Sea Level <br /> TPH-G =Total Petroleum Hydrocarbons as Gasoline <br /> MTBE =Methyl Tertiary Butyl Ether <br /> PMP =Well purged/not purged pnor to sample collection <br /> < =Less than or below detection limits <br /> ppb =parts per billion <br /> mgA =milligrams per liter <br /> NM =Not measured <br /> =MtBE setermined by EPA method 8260 <br />