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I <br /> "NOMA <br /> Working To Restore Nature <br /> I Addendum One to Remedial Action Plan March 1, 1993 <br /> Coca-Cola Former Distribution Facility, Stockton, California 5400601 <br /> EMISSIONS RATE CALCULATIONS <br /> AT SYSTEM STARTUP, MONTH 2. AND MONTH 3 <br /> MONTH 1 STARTUP EXTRACTION RATES, AND EMISSION RATES AFTER <br /> ABATEMENT WITH A THERMAL OXIDIZER <br /> Based on the results of the vapor extraction test (RESNA, January 1993), uutial petroleum <br /> 1 hydrocarbon mass emission rates at startup of the vapor extraction system are estimated <br /> below Startup emission rates are of primary concern, because emissions are greatest at <br /> system startup. Based on the data in Table A-5, the estimated TPHg concentration <br /> extracted from the soil at startup is 5,287 mg/m3; and the estimated benzene concentration <br /> extracted at startup is 271 mg/m3. The design flow for the VES for Month 1 is 75 cfm <br /> assuming only well VEW-3 is on line; and the design flow for the remaining months is 225 <br /> cfm assuming all three wells on line. <br /> Month 1: TPHg Extraction Rate at Startup - VEW 3 On Line <br /> Converting 5,287 mg/m3 to parts per million by volume (ppmv): <br />' = 5,287 mg TPHx 1 g_ x 1 mole TPHg x 22 414 1 vapor x 1 m3 x 1 cm3 x 1�Q ml <br /> m3 1,000 mg 100 g 1 mole TPHg 106 cm3 1 mi 11 <br />' = <br /> 1,185 = 1,185 ppmv <br /> 106 <br /> Thus, the initial TPHg concentration at vapor extraction system startup will be <br /> approximately 1,185 ppmv. <br /> The TPHg Extraction Rate, prior to abatement is, <br /> 1,185 1 TPHQ x 75 Ft3 x 1,440_min x 28321 air x 1 mole TPH-z x 100_g, x 1 lb <br /> 1,000,000 1 air mm day 1 ft3 22.4141 vapor mole TPHg 454 g <br /> = 35 6 lb TPHe <br /> I day <br /> = 1068 1b TPHg/month <br /> I B-1 <br />