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TABLE 5 <br /> LABORATORY RESULTS OF VAPOR SAMPLES FROM INDIVIDUAL WELLS <br /> THRIFTY OIL STATION##172, STOCKTON, CA <br /> • <br /> WELL/ ANALYTICAL PARAMETERS <br /> SAMPLE DATE TPH B T E X MTBE COMMENTS <br /> s PIEAwr D my m my my my my <br /> 04/20/04 293 0 128 125 0 378 131 366 <0 001 BTEX&MTBE by Method TO 15 Xylenes reported as <br /> M P &o xylenes <br /> 05/04/04 544 73 50 68 28 18 <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 35 92 35 40 <5 0 <br /> 08/26/04 456 3 1 96 075 33 70 <br /> 03/08/05 <5 <001 006 <001 0 14 <0 1 <br /> 06/08/05 18 400 170 420 68 261 525 <br /> NOTE 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 8021 B <br /> 172 Pr1B5 VES well. Page 6 of 6 6121/2005 <br />