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TABLE 5 <br /> LABORATORY RESULTS OF VAPOR SAMPLES FROM INDIVIDUAL WELLS <br /> THRIFTY OIL STATION# 172, STOCKTON, CA. <br /> LL/ ANALYMCAL PARAMETERS <br /> LE DATETPH B T E MTBE COMMENTS <br /> ID v 'v my my my <br /> 07/10/03 445 1 5 28 79 52 24 <br /> 08/14/03 516 77 52 68 37 79 <br /> 09/11/03 633 038 25 063 27 02 <br /> 10/16/03 637 50 30 36 24 30 <br /> 11/20/03 #N/A #N/A #N/A #NIA #N/A #N/A Insufficient sample <br /> 11/25/03 403 1 1 20 57 34 <10 <br /> 12/16/03 434 1 8 40 78 41 029 <br /> 01/20/04 230 034 102 032 09 <0 25 <br /> 02/12/04 9,400 115 174 39 164 228 <br /> 03/16/04 440 5 6 17 30 14 11 <br /> BTEX&MTBE by Method TO-15 Xylenes reported as <br /> 04/20/04 293 0128 1 25 0 378 131 ,366 <0 001 <br /> 05/04/04 544 73 50 68 28 18 m p &o-Xylenes <br /> 06/08/04 1,680 ` <0 25 29 <0 25 <0 75 <2 5 "Lab report indicates does not resemble gasoline pattern <br /> 07/07/04 1,990 3 5 92 35 40 <5 0 <br /> 08/26/04 456 3 1 96 075 33 70 <br /> 03/08/05 <5 <0 01 006 <0 01 1 014 <0 1 <br /> 06/08/05 18,400 170 420 68 261 525 <br /> 09/27/05 134 093 20 3 5 12 059 <br /> Benzene,toluene,ethlybenzene,and xylene analyzed by EPA method 8021 B <br /> Total petroleum hydrocarbons(TPH)analyzed by EPA method 8015M <br /> Methyl-tert Butyl Ether(MTBE)analyzed by EPA method 8021B <br /> • <br /> 172TQB5 ICS we!!s Page 7 of 7 10/10/2005 <br />