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KLEINFELDER <br /> • MTBE by EPA Method 8260B [non-detect <0.50 µg/1]; <br /> DIPE by EPA Method 8260B [non-detect<0.50 µg11]; <br /> ETBE by EPA Method 8260B [non-detect<0.50 µg111; and <br /> • TAME by EPA Method 8260B [non-detect<0.50 µg/1]. <br /> f . <br /> For a summary of analytical data for the analytes listed above, please see Table 2 behind the <br /> "Tables"tab of this report. <br /> 5.3 SOIL GAS MONITORING <br /> Photo Ionization Detector (PID) samples were taken from the five vapor extraction wells (VE-1 <br /> through VE-5) each month in during the Third Quarter 2004. Extraction wells VE-2 through <br /> fVE-5 averaged approximately 35 ppm for the three months during the Third Quarter. VE-1 <br /> (located in the former tank area) ranged from approximately 950 to 1100 ppm (before PID <br /> termination). Air inlet sampling was conducted at the main manifold of the catalytic oxidizer on <br /> f June 2, 2004. TPH-G was detected at a concentration of 460 ppm, showing an increase from the <br /> previous (March 22, 2004) sampling event of 28 ppm, still below the 1,400 ppm detected during' <br /> the September 2003 sampling event. <br /> I <br /> a <br /> ...._ .. _. ....... <br /> 12280.MON/ST04R1610/JZ:ly Page 10 of 13 <br /> 0 2004,Kleinfelder,Inc. December 10,2004 <br />