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Table 2 Ozone Injection Groundwater Monitonng Data 76 Service Station No 11192 1403 Country Club Boulevard Stockton Calrfomia Monitoring Well MW-3 Monill rInq Well MW-4 Ethyl Xylenes Ethyl- Xylenes Notes ORP DO GRO Benzene Toluene benzene (total) MtBE TBA ORP DO GRO Benzene Toluene benzene (total) MtBE TBA Date m m A (Nan) MAI, (Nass (Pas) (Nam (Nem (Ness (MV) (mall) (Nem (Nam {Nam (NvA) (Nem MA) (Pam 11!15!2002 a <12 000 <120 <120V--- <120 <500 180,004 150 <0 50 067 <0 50 064 150 <500 1/312003 a <10 000 <100 <100 <100 <400 150,000 – <50 -0 50 <D 50 <0 SD <1 0 130 -5013 113172003 a <25 000 -250 -250 -504 <1 000 160,000 <50 <0 54 <0 50 <0 50 <1 0 64 -100 2!1912003 a – 3,300 <5 D <5 0 <10 280 – <50 <0 50 <0 50 <0 50 <1 0 30 – 312112003 a 250 <0 50 <0 50 <0 50 14 – – <50 <0 50 <0 50 <0 50 <0 50 3 7 – 412212003 a – – 220 <0 50 <0 50 <0 50 15 – _ <50 <0 50 <0 50 <0 50 <0 50 21 – 511412D03 a <5 000 <50 <50 <50 <200 120,000 – <50 <0 50 <0 50 c0 50 <0 50 19 -500 6/2012003 a 180 <0 50 <0 50 <0 50 <0 50 13 160,000 – <50 <0 50 <0 50 <0 50 <4 50 43 18 7!2212003 a <5 000 <50 <50 <50 <50 <200 110,000 65 <0 50 <0 50 <0 50 <0 50 39 140 9/2612003 – – 1,400 <1 0 <1 0 <1 0 <1 0 320 – _ <50 <0 50 <0 50 <0 50 <0 50 <5 0 – 10131/2003 60 – <25D00 -250 -250 <250 <500 <250 – 206 – <50 <0 50 2 5 0 51 26 <0 50 11/25/2003 7 – <5000 <50 <50 <50 <1 DD <200 – 165 – <50 <0 50 <D 50 <0 50 <1 0 <2 0 12/17!2003 – – <i0000 <100 <100 <100 <200 <400 110,000 – _ <50 <0 50 <0 50 <0 50 <1 0 <2 0 <100 1!20!2004 36 -5000 <50 <50 <50 c100 -200 98,000 166 – <50 <0 50 <D 513 <0 50 <1 0 31 H00 271272004 – _ <10000 <100 <100 <100 <200 <400 110,000 – <50 <0 50 <0 50 <0 50 <1 0 3 9 <100 3/3172004 1 -50013 <50 <50 <50 <400 <50 58,000 115 – <50 <0 50 -0 50 <0 50 -1 0 3 4 <5 0 412312004 13 755 <5000 <50 <50 <50 <100 <50 69,000 64 649 <50 <0 50 <0 50 <0 50 <1 0 16 <50 5!1912004 3 2 14 <100000 <100 <100 <100 <200 <100 67,000 67 4 96 <50 <0 50 <0 50 <050 <1 D 1 7 <5 0 6!21!2004 -14 594 <1000D0 -100 -100 -1130 -200 -100 61,000 43 6 35 <50 <0 50 <0 50 -0 58 <1 0 <5 D 4 0 7729!2004 30 4 41 -100000 -100 <100 <100 <200 <100 77,090 55 4 78 <50 <0 50 <0 56 <0 50 <1 0 <50 16 8119!2004 24 2 87 -5000 <50 <50 <50 <100 <5D 57,000 ifi 3 69 <54 <0 50 M<O50 <0 50 <1 0 <50 12 9I16120D4 58 —009 <5000 <50 <50 <50 <100 <50 67,000 26 010 <50 <0 50 :<050 <1 0 <5 D 13 10128/2004 25 2 09 <5000 <50 <50 <50 <100 <50 41,000 25 2 86 <50 <D 513 <1 D <0 5 <5 0 t 1730!2004 6 4 58 5000 <50 <50 <50 <100 <50 51,000 35 3 68 <50 <0 50 <1 0 68 5 8 12130120134 1 0 03 <2500 <0 50 <0 50 <0 50 <1 0 <25 43,000 43 001 <50 <0 50 <1 0 <0 5 <5 D f 725!2005 b c 58 7 53 <50 <0 50 <0 50 <0 50 <1 0 0 91 37,000 69 6 86 <50 <0 50 2/2572005 20 558 <2500 <0 50 <0 50 <0 50 <1 0 <25 37,000 31 645 <50 <0 50 <1 0 4 8 <50 3!2212005 53 657 <2500 <0 50 <0 50 <0 50 <1 D <25 25,000 102 6 78 <50 <0 50 <0 50 <0 50 <1 0 1 6 <5 0 412 5 120 0 5 b c 0 6 02 86 <0 50 <D 50 <0 50 <1 0 <0 50 19,000 174 624 <50 <0 50 <0 513 <0 50 <1 0 <50 073 513 V2005 37 055 <5000 <0 50 <0 50 <0 50 <100 <0 50 29,000 25 6 39 <50 <0 50 <0 50 <0 50 <1 0 <5 0 1 4 6/2972005 67 7138 -2500 <0 50 <0 50 <0 50 <1 0 <25 21,000 175 6 73 <50 <0 50 <0 50 <0 50 <1 0 <50 0 61 � Defimtrona Notes GRO=Gasoline Range Organics or total petroleum hydrocarbons as gasoline(TPHg) a Sampled by Gettler Ryan Inc MtBE=Methyl tert-butyl ether b MW-3 The concentration reported reflect(s)individual or discrete unidentified peaks not matching a typical fuel pattern TBA=Tertiary butyl alcohol c MW-4 The concentration reported reflect(s)individual or discrete umdentifted peaks not matching a typical fuel pattern pgll=Micrograms per liter ORP=Oxidation Reduction Potential mV=Millivolts DO=Dissolved Oxygen mgA=Milligrams per liter Data not available I I I IConocoPhillipslRetail S11eMl119210&m111192 RM&R Ozone Sparge Workbook2QOSSR As Page 1 of 1