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i <br /> f <br /> Table 2 <br /> Ozone Infection-Groundwater Monitoring Data <br /> ConocoPhillips Service Station#6981 <br /> 4707 Pacific Avenue Stockton California <br /> MonitoringWeil MW-16 MonitoringWell VW-7 <br /> Ethyl- Xylenes Ethyl- Xylenes <br /> ORP DO TPHg Benzene Toluene benzene (total) MtBE ORP DO TPHg Benzene Toluene benzene (total) MtBE <br /> Date mV (mg/L (IVgIL) I (lags) (ugn) (PPA) (ugn) (P9A) mV m (po) MAI (w) (I.19n) (Pgrt) <br /> 6f2512003 a -- -- 220 24 0 57 32 56 43 - -- 14,000 77 110 210 1,100 <20 <br /> 7122/2003 a — 170 27 0 53 2 8 82 31 3,500 35 37 59 330 <20 <br /> 8122/2003 a -- — 160 23 0 63 2 9 8 7 26 - — 2,200 19 9 6 3 8 43 <2 0 <br /> 9126/2003 — 230 34 067 4 6 8 6 32 — 15,000 53 47 290 1,300 <50 <br /> 10/31/2003 -63 -- 190 22 2 4 4 0 7 8 17 -91 -- 12,000 13 36 170 610 <5 0 <br /> 11125/2003 b — 130 17 <0 50 3 0 5 2 14 -85 — 6,200 8 4 19 110 180 <10 <br /> 12/1712003 b - 4,10D 9 6 16 79 19 <10 b — 83 9 4 <0 50 1 7 31 12 <br /> 1/9/2004 b — 110 13 <0 50 1 5 37 15 -55 — 7,900 46 15 110 410 <10 <br /> 2112)2004 b — 87 5 3 <0 50 1 3 31 9 7 b — 10 000 8 0 19 230 290 <10 <br /> 3/3112004 b -- 51 2 2 <0 50 0 50 16 4 3 -95 — 7,700 57 13 180 270 <5 0 <br /> 412312004 b 5 85 <50 1 5 <0 50 <0 50 <1 0 2 8 b 2 87 6,400 4 8 7 6 120 13 <2 5 <br /> 5/19/2004 b 608 71 41 <0 50 0 87 1 6 4 5 b 569 4,300 5 5 6 5 <2 5 <5 0 <2 5 <br /> 6/16/2004 b 588 120 12 <0 50 3 5 5 8 9 7 b 552 5,300 4 5 6 3 110 6 5 <25 <br /> 7/29/2004 b 1 15 130 140 <0 50 32 5 2 6 9 b 2 50 5,400 6 3 9 6 110 37 <25 <br /> 8/19/2004 b 345 100 5 6 <0 50 <0 50 1 6 77 -86 3 83 5,300 57 89 76 6 <25 <br /> 9/16/2004 c — — — — — — -84 0 07 1,300 3 5 2 8 14 2 <0 50 <br /> 10/28/2004 c — — — — — — — -64 228 2,000 1 1 2 6 32 24 <1 0 <br /> 11/30/2004 d — — 110 51 <0 50 22 2 5 8 4 -68 341 3,200 23 4 1 73 6 4 <0 50 <br /> 12/30/2004 92 842 79 fi t <0 50 23 3 3 8 6 -40 6 57 3,600 3 5 6 5 79 13 <1 0 <br /> 1/25/2005 b 7 65 55 4 5 <0 50 13 2 0 7 9 -64 6 54 6,200 3 4 7 1 110 79 <1 0 <br /> 2/11/2005 b 373 91 34 <0 50 1 2 19 7 5 42 203 5,700 2 4 4 8 69 19 <2 5 <br /> 3/22/2005 e b 6 34 -77 546 <br /> Definitions Notes <br /> TPHg Total petroleum hydrocarbons as gasoline a Sampled by Gettler-Ryan,Inc <br /> MtBE Methyl tert-butyl ether b Reading is below the lower range of instrument -99 <br /> gg1L Micrograms per liter c Well MW-16 is dry <br /> ORP Oxidation Reduction Potential d Well MW-16 enough water to sample not enough to collect readings <br /> mV Millivolts -- Data not available <br /> DO Dissolved Oxygen a Data not available at time of reporting <br /> mg/1 Milligrams perliter <br />