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Table A 2 <br /> Ozone Injection-Groundwater Monitoring Data <br /> C4rcle K Store No 011192 <br /> 1403 Country Club Blvd Stockton,California <br /> Monl ring Well MW3 Monitoring Well MW 4 <br /> Ethyl- Xylenes Ethyl- Xylenes <br /> ORP DO TPHg Benzene Toluene benzene (total) MtBE TBA ORP DO TPHg Benzene Toluene benzene (total) MtBE TBA <br /> Date mV I (psn) (Nan) (PQA) (pc^) (from (PgA) (porn mV (p9n) (pW) (w) (N4n) (I�9n) ("211) (NGn) <br /> 11/1512002 a — — <12,000 <120 <120 <120 <120 <500 180 000 — — 150 <0 50 0 67 <0 50 0 64 150 <500 <br /> 113/2003 a — -- <10 000 <100 <100 <100 <100 <400 150,000 — <50 <0 50 <0 50 <0 50 <1 0 130 <500 <br /> 1131/2003 a — -- <25 000 <250 <250 <250 <500 <1 000 160 000 <50 <0 50 <0 50 <0 50 <1 0 64 <100 <br /> <50 <0 50 <0 50 <0 50 <1 0 30 <br /> 211 9120 0 3 a — — 3300 <5 0 C5 0 <5 0 <10 280 -- c c0 50 <0 50 <0 50 <0 50 3 7 — <br /> 3/21/2003 a — 250 <0 50 <0 50 <0 50 <0 50 14 — 50 <br /> 4/22/2003 a — — 220 <0 50 <0 50 <0 50 <0 50 15 — — — <50 <0 50 <0 50 <0 50 <0 50 21 — <br /> 511 4120 0 3 a — — <5,000 <50 <50 <50 <50 <200 120 000 — <50 <0 50 <0 50 <0 50 <0 50 19 <500 <br /> 6/2012003 a — — 180 <0 50 <0 50 <0 50 <0 50 13 160 000 — — <50 <0 50 <0 50 <0 50 <0 50 43 18 <br /> 7/2712003 a — <5 000 <50 <50 <50 <50 <200 11000o — — 65 <0 50 <0 50 <0 50 <0 50 39 140 <br /> 912612003 — 1,400 :<250 <br /> <1 0 <1 0 <1 0 320 — <50 <Q 5Q <0 50 <0 50 <0 50 45 0 — <br /> 10/31/2003 60 -- <2 0000 <250 <250 <500 <250 206 — <50 <0 50 2 5 0 51 2 6 <0 So — <br /> 11/25/2003 7 — <5000 <50 <50 <100 <200 -- 165 — <50 <0 50 <0 50 <0 50 <1 0 <2 0 — <br /> 12117=03 -- <10000 <100 <100 <200 <400 110000 — -- X50 <0 50 <0 50 <0 50 <1 0 <2 0 <100 <br /> <5000 <50 <50 <100 <200 99,000 166 <50 <0 50 <0 50 <0 50 <1 0 81 <100 <br /> 1120!2004 36 — — <br /> 2l12/2004 — — <10000 <100 <100 <200 <400 110,000 — — <50 <0 50 <0 50 <0 50 <1 0 39 <100 <br /> 3131/2004 1 — <5000 <50 <50 <50 <100 <50 58 000 115 — <50 <0 50 <0 50 <0 50 <1 0 3 4 <5 0 <br /> Definitions Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline a =Sampled by Gettler-Ryan,Inc <br /> MtBE=Methyl tart-butyl ether — =Data not available <br /> ppb=Parts per billion <br /> ORP=Oxidation Reduction Potential <br /> I <br />