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i <br /> f <br /> SUMMARY OF GROUND-WATER MONITORING DATA <br /> Second Quarter 1992 <br /> ARCO Service Station 2133 <br /> 2W6 Benjamin Holt Drive,Stockton <br /> (micrograms per liter(ug/1)or parts per billion (ppb), unless noted <br /> Floating <br /> Well ID Depth to Product Total TPH as Fecal <br /> and Sample Sampling Water Thickness Benzene Toluene Ethylbenzene Xylenes Gasoline Collform <br /> Depth Date Leet feet It <br /> b b) (ppb) - (ppb) (ppb) (CFU/100m1) <br /> I <br /> PR-1 (27) 4/22/92 1690 ND' ND ND ND ND ND <br /> PR-2(27) 4122192 1629 ND ND ND ND ND ND <br /> BHD-1 (27) 4122192 1639 ND, 130 67 200 120 3,000 <3 8 <br /> 131-113-2(28) 4/22192 1666 NDi ND ND ND ND ND <3 8 <br /> E-2(22) 4122192 1862 ND 37 22 37 60 1,200 - <br /> E-3 -- 1820 ND <br /> E-4 (21) 46092 1805 NDi' 1730 12 110 200 6,300 <br /> E-5(19) 4/22J92 1831 NDI 4,300 130 560 1,700 28,000 <br /> E-6 -- 1855 ND, - - - <br /> E-7 (18) 4122192 1681 ND <2 V <3 2" <1 9' <1 9' 500 - <br /> E-8(23) 4122192 1671 ND 93 <2 5' 37 53 _1,200 <3 8 <br /> E-9 (18) 4/22192 1745 ND' 170 98 50 120 3,600 - <br /> E-10 (22) 4121192 1714 ND, 2,800 1,300 880 3,400 26,000 <br /> E-11 (23) 4122192 1908 ND X570 57 150 510 14,000 <br /> E-12 (22) 4/22192 1769 ND, 43 <3 2' 09 21 660 <br /> TPH:Total petroleum hydrocarbons <br /> ND 3 Not detected <br /> " = Raised MRL due to matrix interference - <br /> G71-19 01 <br /> I = � <br /> 3 a <br />