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k" KLEINFELDER <br /> During operation of the Source Test, several parameters were monitored and the inlet and outlet <br /> of the system were sampled (laboratory data sheets and chain of custody record are attached). A <br /> summary of the findings are provided in Table 1: <br /> Table 1 - System Operating and Sampling Results <br /> PA>=ameter. : a�uted lYtethod U ed Result <br /> Combined Vent Well Flowrate Anemometer 130 scfm <br /> Estimated Dilution Flowrate Anemometer 120 scfm <br /> Combustion Air Flowrate Blower Specifications 250 scfm <br /> Stack Flowrate at Outlet Sample Point Summation of Above 500 scfm <br /> System Vacuum Magnahelic Gauge -40 in we <br /> Inlet Tem erature Thermometer 65.7 de F <br /> Chamber Temperature Thermal System Readout 930 deg F <br /> Inlet Concentration(TPH) Anal ical Results EPA Method TO-14A) 1400 pprn <br /> Inlet Concentration(Benzene) Analytical Results EPA Method TO-I4A) 5.9 ppm <br /> Outlet Concentration(TPH) Analytical Results EPA Method TO-14A) 7.2_ppm <br /> Outlet Concentration (Benzene) Anal 'cal Results(EPA Method TO-14A) ND <br /> In general the system operated within expected parameters, although the well flow was still <br /> below anticipated Ievels. Concentrations of 1,2 DCA were again not detected in the inlet stream <br /> to the system. It is assumed that either the 1,2 DCA has migrated off the source area, or the <br /> TPH-g concentrations altered the detection levels during analysis. Concentrations of TPH were <br /> lower than the previous source test (1800 ppm), consistent with reductions from ongoing site <br /> remediation. We expect to run a combined vent well flow rate of approximately 150 cfin for the <br /> duration of the remediation. <br /> The estimated extraction rate and emission rate for TPH and benzene were calculated using the <br /> analytical sample results input into the following equation: <br /> lC )• dugll1• F ft' 9E-5 minl-lh <br /> Pp„� PPm J min day-ft .ug <br /> where: <br /> F= System flowrate (130 scfm at the inlet, 500 scfm at the outlet) <br /> d= 4.125 for TPH, 3.25 for benzene <br /> C= Concentration of COC at the sample point <br /> 12280.REM2/ST031,581 Page 2 to 4 <br /> Copyright 2003,Kleinfelder,Inc. October 21,2003 <br />