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"SOMA <br /> Working To Restore Nature <br /> Addendum One to Remedial Action Plan March 1, 1993 <br /> Coca.-Cola Former Distribution Facility, Stockton, California 54006.01 <br /> = 514 parts benzene = 514 ppmv <br /> 106 parts vapor <br /> And, the Benzene Extraction Rate during Month 2 is: <br /> 51.4 pnmv benzene x 71 lb TPHg/day = 4.61b benzene/day <br /> ' 789 ppmv TPHg <br /> Month 2: Benzene Emission Rate ager Abatement by Thermal Oxidizer <br /> Using the worst case 95% destruction efficiency achieved by the thermal oxidizer, the <br /> japproximate inutial benzene mass emission rate after abatement is: <br /> Benzene Mass Emission Rate from Stack = (1 - 0 95) 4.6 lb benzene/day <br /> = 0.23 lb benzene/day <br /> MONTH 3 TPHg EXTRACTION RATES,AND EMISSION RATES AFTER ABATEMENT <br /> BY THERMAL OXIDIZER <br /> According to Shell Development/Shell Oil Company (1990), extracted TPHg concentration <br /> is predicted to decrease by 90% during about the third or fourth month of operation of the <br /> VES. Since only one well will be on line during the first month, this 90% decrease is <br /> predicted to occur during the third month, rather than the second month. The decrease is <br /> based on 90% of the startup TPHg concentration of 1,185 ppm. <br /> Month 3: TPHg Extraction Rate <br /> Duang Month 3 the average TPHg concentration is predicted to be 10% x 1,185 ppmv = <br /> 119 ppmv. Thus, with 3 wells operating during month 3, the projected TPHg extraction rate <br /> tbefore abatement is: <br /> = 119 1 TPHg x 225 Fe x 1,440 min x 2832 i air x 1 mole TPHl_ x 100 g x 1 lb <br /> 1,000,000 1 au min day 1 ft, 22.4141 vapor mole TP1% 454 g <br /> = 10 7 lb TPHg <br /> ' day <br /> = 321 lb TPHg/month <br /> B4 <br />