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id% a i i i i i <br /> TABLE 2 <br /> RESULTS OF DIRECT READINGS OF VOC'S CONCENTRATIONS <br /> Montgomery Ward Auto Service Center <br /> 5400 Pacific Avenue, Stockton, CA <br /> Date Background Soil Vapor to Oxidizer Combustion Air Combustion Gases DRE 16) <br /> VOC's Temperature Flow VOC's Valve Flow Flow VOC's <br /> ppmv OF acfm scfm(1) ppmv scfm(2) % scfm(3) scfm(4) ppmv scfm(5) % <br /> 10/07/99 58 168 352 281 1 2,980 8 38E-01 0 0 281 1 132 2 08E-02 9752 <br /> 11/18/99 0 130 327 2780 24,192 6 72E+00 20 60 3380 55 1 86E-02 9972 <br /> 12/20/99 NA 120 240 2075 NA NIA 20 60 2675 NIA NIA NIA <br /> 03/28/00 NA 112 243 2131 NA NIA 36 108 3211 NIA NIA NIA <br /> 05/22/00 0 160 224 1812 280(7) 5 07E-02 455 138 3192 1 5 4 79E-04 9906 <br /> 06/15/00 58 150 235 1932 2,960 5 72E-01 492 147 3402. 122 2 18E-02 96191 <br /> Note <br /> (1) scfm =aef n *(460}60)/(160+° F)*4071(407+15) <br /> where 407 - atmospheric pressure in incites Watei Gauge <br /> 15 - blower discharge pressure in inches Watei Gauge <br /> (2)VOC's scfm = flow scfin # VOC's ppmv *10 6 <br /> (3)Combustion Air Flow scfin =300 * Vave %/100 <br /> (4)Combustion Gases Flow scfm =flow to Oxidizei scfin +Combustion Air Flow scfm <br /> (5)Combustion Gases VOC's scfm=Combustion Gases h low scfin <br /> *(Combustion Gases VOC's ppmv - Background ppmv)* 10 6 <br /> (6) DRE %= (VOC's scfin - Combustion Gases Voc's seftn)/VOC's scfin*100 <br /> (7) Calculated as 2%of LEL(1 I% v) <br />