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OE I <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 141 N El Dorado Street <br /> Stockton,California <br /> WIC#204-7524-1509 <br /> Sample Measured Corrected SP TPPH B T E X MTBE �Methanoll dO d0 Comments <br /> GW Depth GW Elev <br /> Date (ft) 01) (ft) (ug/L) (ug/LI <br /> (ug/L) (uglL) (ug/L) (ug/L) mg/L (mg/L) Method <br /> 09-Jul-97 2077 7387 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 NA 1 2 YSI Meter <br /> 09 Oct-97 21 17 7347 000 <50 <0 50 <0 50 <0 50 <0 50 49 <1 0 1 1 YSI Meter All Oxygenate Compounds by 8260 ND except for MTBE 7 2 ppb <br /> All Oxygenate Compounds by 8260 ND except for MTBE 17 ppb <br /> 13 Jan 98 2092 7372 000 <50 <0 50 <0 50 <0 50 <0 50 NA <1 0 04 YSI Meter See Lab data for note <br /> 22-Apr-98 1781 7683 000 <50 <0 50 <0 50 <0 50 054 23 NA 068 YSI Meter <br /> MW-3(DUP) <br /> 02-Apr 97 NA NA NA <50 <0 50 <0 50 <0 50 <0 50 (a) NA NA NA EPA 8010 Detections <br /> 09-Oct 97 NA I NA NA <50 { <0 50 <0 50 { <0 50 <0 50 50 { <1 0 NA NA All Oxygenate Compounds ND except for MTBE 7 1 ppb <br /> MW-4____L Top casing elevation (ft) 9490 1I <br /> 05-Aug 92 3605 5885 000 { 220 1 <0 5 <0 5 I <0 5 <0 5 NA NA NA NA <br /> 04-Nov 92 ! 3719 5771 000 { 200 36 <0 5 <0 5 <0 5 NA NA NA NA <br /> 09 Feb 93 ! 3586 5904 000 230 1 9 1 2 <0 5 1800 NA NA NA i NA <br /> 26 May 93 { 3759 I 5731 I 000 80 085 <0 5 <0 5 <0 5 NA NA NA NA <br /> 26 Aug-93 { 3668 58 22 000 66 1 0 <0 5 <0 5 <0 5 NA NA NA NA <br /> 22-Nov 93 { 3854 { 5636 { 000 77 9 4 { <0 5 <0 5 I <0 5 NA I NA NA NA <br /> 15-Feb-94 I 37 84 5706 j 000 <50 <0 5 { <0 5 <0 5 <0 5 NA NA NA NA <br /> 10 May-94 3.577 59 13 000 <50 <0 5 { <0 5 <0 5 <0 5 NA j NA NA NA <br /> 16 Aug 94 I 3337 61 53 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 14 Nov-94 3402 60 88 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 22-Feb 95 ! 3244 6246 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 24 May-95 2816 1 6674 000 60 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 05 Oct-95 2724 6766 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 15-Nov-95 2765 I 67 25 { 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 27 Mar-96 { 2446 7044 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA 108 YSI Meter <br /> 16 May 96 2481 7009 { 000 <50 1 <0 50 <0 50 <0 50 <0 50 14 I NA 56 YSI Meter <br /> 23-Aug 96 { 24 05 7085 000 <50 10 <0 50 <0 50 , <0 50 <2 5 NA 5 4 YSI Meter <br /> 25-Oct 96 I 24 57 7033 000 <50 <0 50 <0 50 <0 50 j <0 50 NA' NA 46 1 YSI Meter MTBE by 8260 3 6 ppb <br /> 31-Jan 97 1985 7505 000 <50 <0 50 <0 50 <0 50 <0 50 (a) I NA 2 4 YSI Meter <br /> 02 Apr 97 2152 7338 ! 000 <50 <0 50 <0 50 <0 50 <0 50 41 NA 1 3 YSI Meter EPA 8010 Detections <br /> 09 Jul-97 2140 7350 1 000 <50 <0 50 <0 50 <0 50 <0 50 <25 NA 2 2 YSI Meter I <br /> 09 Oct-97 2178 7312 000 { <50 <0 50 <0 50 I <0 50 <0 50 <2 5 <1 0 1 6 YSI Meter All Oxygenate Compounds by 8260 ND <br /> 13 Jan 98 21 58 73 32 { 000 <50 <0 50 <0 50 <0 50 <0 50 <25 <1 0 1 1 YSI Meter All Oxygenate Compounds by 8260 ND <br /> 22-Apr-98 1847 7643 000 <50 <0 50 <0 50 <0 50 <0 50 3 9 NA 067 YSI Meter <br /> 240 0621 3 <br /> I <br />