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- hn KLEINFELDER Table 1 - System Operating and Sampling Results Paialneter'Evaivated . > ux � mN' M:efYod Used-r x., Combined Vent Well Flowrate Anemometer 65 scfm Estimated Dilution Flowrate Anemometer 185 scfln Combustion Air Flowrate Blower Specifications 250 scfm Stack Flowrate at Outlet Sample Point Summation of Above 500 scfm System Vacuum Magnahelic Gauge - 40 in we Inlet Temperature Thermometer 65.7 deg F Chamber Temperature Thermal System Readout 1400 deg F Inlet Concentration(TPH) Analytical Results 1800 ppm Inlet Concentration (Benzene) Analytical Results 1.4 ppm Outlet Concentration (TPH) Analytical Results 0.13 ppin y� Outlet Concentration (Benzene) -Analytical Resttlts ND 1 In general the system operated within expected parameters, although the well flow was below anticipated levels. Concentrations of 1,2 DCA were not detected in the inlet stream to the system. It is assumed that either the 1,2 DCA has migrated off the source area, or the TPH-g concentrations altered the detection levels during analysis. It was also noted that the maximum hydrocarbon levels detected in the air stream entering the control equipment was greater (1800 ppm) than originally anticipated (500 ppm). We expect to run a flow rate of approximately 150 cfm for the duration of the remediation. The estimated extraction rate and emission rate for TPH and benzene were calculated using the analytical sample results input into the following equation: (C_)'(dugll� CF ftn ).(9E-5 miml-lb J 111 ppm/// min day•ft ug Il where: I F= System flowrate (65 scfm at the inlet, 315 scfm at the outlet) d= 4.125 for TPH, 3.25 for benzene C= Concentration of COC at the sample point Using the above equation, the emission rates and corresponding efficiencies for system were calculated and provided in Table 2: If 1 i 12280.REM2/STOC3R881 Page 2 to 4 Copyright 2003,Kleinfelder,Inc. June 20,2003