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Table 2 Ozone Injection Groundwater Monitoring Data 76(Former BP) Service Station No 11192 1403 Country Club Boulevard Stockton California Monitoring Well MW-3 Monitoring Well MW4 Ethyl Xylenes Ethyl Xylenes Notes ORP 00 GRO Benzene Toluene benzene (totat) MtBE TBA ORP DO GRO Benzene Toluene benzene (total) MtBE TBA Date m m {VMI (pM] (VMI {NMS {VMI {NMl {VMI m m {Vsfin {VM} (VM) (VM1 (VMI {VMJ {Noll 4120 4500 180 000 150 <0 50 0 67 <0 50 064 150 <5D0 i 11152002 a – – 412 000 4120 <l20 4120 _ <50 <0 50 <0 5p <0 50 <1 0 130 <500 410 000 <100 <1OD <100 <100 4400 150 000 4100 1/32003 a – – < <D 50 <0 50 <0 50 <1 0 64 1131!2003 a – – <25 000 <25D <250 <250 <500 <1 000 160 000 – 50 – 21192003 a 3,300 <50 <5 0 <50 <10 280 – <50 <0 50 <0 50 <0 50 <1 0 30 250 <0 50 <0 50 <0 50 <0 50 14 <50 <0 50 <0 50 <0 50 <0 50 3 7 3121(2003 fl – <5D <D 50 <0 50 <0 50 <0 50 21 – 4122/2003 a – 220 <0 50 cO 50 <D 50 <Q 50 15 -- – 5/1412003 a <5 000 <50 <50 <5D <50 <200 120,000 – <50 <0 50 <0 50 <0 50 <0 50 19 4500 W2 -2 50 <D 50 <0 50 <D 50 13 1 BO 000 <50 <0 50 <0 50 <0 50 <0 50 43 18 672 012 0 0 3 a – – 450 4200 110 000 65 <0 50 <0 50 <0 50 <0 50 39 140 7!2212003 a – – 0 <50 <50 – _ 9120003 0 <1 0 <1 0 <1 D 320 – _ <50 <0 50 <D 50 <0 50 <D 50 <5 0 10!31!2003 60 – 0 4250 4250 4500 4250 206 – 450 <0 50 2 6 0 ii 2 6 <0 5D – <100 <20Q – 165 – 450 <D 50 <D 50 <0 50 <1 0 <20 – 11252003 7 – D 450 450 c50 <0 50 <0 50 <0 5D <1 0 <2 D 4100 0 4100 <100 <2DO <400 110 000 121172043 –U20120G4 -36 _ 4100 4200 99 000 166 <50 <0 50 <D 50 <0 5D <1 0 8 1 4100 D 450 2/1212004 – <10 0000 <100 <200 <400 110,000 – <5p <0 5D <0 50 <0 50 <1 0 3 9 4100 3/312004 1 <5 0000 <50 <100 <50 58,000 115 – 450 <0 50 <0 50 <4 50 <1 4 34 <5 0 4/23/2004 13 7 55 <5 0000 <50 4100 450 69 000 64 649 <50 <0 50 <0 50 <0 50 <1 0 16 <5 0 5119/2004 3 214 <1D00000 4100 <200 <100 67,000 67 4 96 <50 <0 50 <0 50 <0 50 <1 0 5 0 4 0 6/21/2004 14 5 94 7292004 30 4 41 4100 0000 4100 4200 4100 77,000 55 4 76 <50 <0 50 <0 50 c0 50 <1 0 <5 0 16 8119!2004 24 2 B7 <5 DOO0 450 <1 DO <50 67,000 16 369 <50 <0 50 <0 50 <0 5D --'Z-1-0 <5 0 12 9116/2004 58 0 09 <5 000 450 450 <5D <100 <50 67,000 26 0 10 450 <0 50 <0 50 <0 5D <1 0 <5 0 13 10/2012004 25 2 09 <5 000 <50 <50N-05G <1 O0 <50 41,000 25 286 <50 <0 50 <0 50 <0 50 <1 0 <0 5 <5 0 11/302004 6 4 58 <5 DOO 450 <50 <1 DO <50 51,000 35 368 <50 <0 50 <0 50 <0 50 <1 0 6 B 6 B 12/302004 1 003 c2 500 40 50 -050 <1 0 <25 43,000 43 0 01 <50 <0 50 <0 50 <05D <1 0 <0 5 <5 0 1/25/2005 b c 58 7 53 <50 <0 50 <0 50 <1 0 091 37,000 69 686 <5D <0 50 <0 50 <0 50 <1 0 29 <5 0 2/252005 20 558 <2 500 <D 50 <0 50 <1 0 <25 37,000 31 6 45 450 <D 5D <0 50 <D 50 <10 4$ <5 0 3222005 53 6 57 <2 500 <0 50 <D 50 <1 0 425 25,000 102 676 <50 <0 50 <0 50 <0 50 <1 0 16 <5 O 4252005 bc 0 602 86 <0 50 <0 50 <1 0 <0 50 19 000 174 5 24 <SQ <0 50 <0 50 <0 50 <1 0 <5 D 0 73 5/3112005 37 655 <5 000 4050 <0 50 <0 50 <100 <D 50 29,000 25 6 39 450 <0 5D <0 50 <0 50 <1 0 <5 0 14 6292005 67 7 OB <2 500 <0 50 <0 50 <0 50 <1 0 <25 21,000 175 6 T3 450 <0 50 <0 5p <D 50 <1 0 <5 D 0 61 7/132005 55 7 01 <1 000 410 <10 <10 <20 <10 20,000 140 6 53 450 c0 50 <0 50 <0 50 <f 4 6 66 <5 0 8242005 19 598 <2 50D <25 <25 <25 <50 <25 23,000 20 6 64 <50 <0 50 <0 50 <0 50 <1 0 13 <5 0 c25 425 425 450 Q5 21 000 167 6 45 <50 <0 50 <0 50 <0 50 <1 0 1 1 <5 0 9282005 b 57 6 63 2,600 c50 <0 50 40 50 <D 50 <1 Q i 0 <5 0 10212005 9 626 42500 425 425 425 450 425 21,000 41 652 11292005 32 6 48 <2 500 425 425 425 450 <25 21 000 181 6 46 <50 <0 50 <0 50 c0 50 ct 0 0 79 <5 D 12292005 d 67 <0 50 <0 60 <0 50 <1 0 0 74 7,000 – – <so <0 50 <0 50 <0 50 <1 0 081 <5 0 Degnidons Notes GRO=Gasoline Range Organics or total pe"leum hydrocarbons as gasoline(TPNg) a Sampled by Gettler Ryan Ina MtBE=Mathyl Cert-butyl ether b MW,3 The concentration reported refled(s)individual or discrete unidentdiied peaks not matching a typical fuel pattern TBA=Tertiary butyl alcohol c MW4 The concentration reported reflect(s)mdrvwdual or discrete unsdentrfied peaks not matching a typical fuel pattern AV=Micrograms per liter d DO and ORP readings not taken due to equipment scheduling miscommunication ORP=Owdabon Reduction Potential my=Millivolts DO=Dissolved Oxygen mgA=MAligrams per liter –=Data not available I I1BP ARCO4111921oSm111192 RMBR Ozone Sparge Workbook)ds