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i T 6 <br /> S Soil Vapor Extras Rate Calculations <br /> Cohn Property <br /> 3755 Munford Avenue <br /> Stockton, California <br /> Vapor Flow Thermal Oxidizer Influent <br /> Date Meter Rate Sample Results my Extraction Rates(lb/day) Cumulative Extraction Ib <br /> (Hours) (scfm) TPHg Benzene TPHg Benzene TPHg Benzene <br /> 08/24/05 1765 <br /> 09102/05 3949 218 4 69 2 5,800 620 135 1 1 1231 96 <br /> 10/10/05 6307 235 8 91 1 5,200 340 160 091 2,680 19 <br /> 11/07/05 8152 1845 91 7 4,200 140 130 038 3,793 24 <br /> 12/12/05 1,6258 8106 880 1,600 2 0 47 005 6,786 31 <br /> 01/09/06 2,0752 4494 104 1 1 200 0 90 42 003 7,625 32 <br /> 02/06/06 2,7485 6733 99 7 850 024 - 29 001 8,616 33 <br /> 03123/06 3,6798 931 3 1278 630 <0 20 27 001 9,697 _ 33 <br /> Note 1 Source Test conducted on 8/25/05 Quarterly calculations do not include the source test <br /> dote 2 Sample results from the thermal oxidizer Influent used in place of the vapor extraction well manifold <br /> Note 3 "<"indicates analytical method detection limit, method detection limits are used as stack concentrations to estimate emission rates and DEs <br /> Note 4 Analytical results from 03114/03 are used to extrapolate cumulative totals through 03/31/03 <br /> MWTPH, =90 MWaefu.,„=78 11 MW, Br==88 15 <br /> Sample Calculations <br /> Ib/day=pounds per day <br /> ppmv=parts per million by volume=ft!11A a f? <br /> scfm=standard cubic feet per minute <br /> Extraction Rate rate=flow rate(fe/mm)`concentration(ftp 11x110°0'MW(IbAb-mole)/384 5(feilb-mole)`1440 min/day <br /> f =cubic feet <br /> APEX ENVIROTECH, INC <br /> Page 1 of 1 COH01 001 <br />