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ME RIM WM "M MINES, the catalytic rt.,actor, from theve ports are an- alyzed to de LernlrW tIls-, )IydroCabon dc-atroCtion efficiencler.. 01)CRATInG Pf:RF0qMANC1' Vapor concentrations from two project situ are shown in Figure 2. Tlic data illustrate the broad range of vapor composition!; under which the WX is capable of operating. The top curve nhovl- data from an operation during which the extracted vapor was In the flammable range. (The lover Mimmability limit of ganoline vapors In air Is about 15,000 ppm(v), or 1.5t(vl). Thv. lower curve shows data obtained during operaLlon of a CAR unit. At the beginning of this project, the extract.(,(] air had a high Combustible content and dilution air was required to prevent overheating of the catalyst. The admixture of dilution air resulted in a slower drawdown of the hydrocarbon concentration for the first 20 days. Potential eminnionn to the atmosphere without control of the vented gas are shown In Fiqure 3. At the 10,000 ppmtv) level and a flow rate of 100 cin, the emir cions would be almost 400 poupidper day. ' The VCP unit with supplemental , fuel would be the recommended operating node at this concen- tration of hydrocarbon,,. Emissions from the VCP have been measured by numerous regulatory agencies such as the San Diego APCD, South Coast AQMD, and the California Air Resources Board. In all instances the hydrocarbon des- truction efficiencies have been above 99.81. Thus actual hydrocarbon emissions from the stack are less than 1.0 lb/day. CO levels have been below 10 ppm, and NOX levels have been below I ppm. Lead and sulfur have not been detected. At the 3,000 ppn(v) level and a flow rate of 90 cfm, the uncontrolled emissions would be 100 lb/day. Operating a catalytic reactor at 90t destruction efficiency would reduce the emissions to TO lb/day. It would be possible to operate the catalytic reactor at a higher destruction efficiency, thereby reducing emissions below 10 lb/day. This could be done by raising the temperature of the catalyst bad. There Is a trade-off, however, between catalyst bad temperature and catalyst life. we recommend-that-the catalytic reactor be-operated-3n a cost-effective way to meet emission gu C- lines while, at the same time, minimizing catalyst deteri- oration. At recommended operating conditions the catalyst life has been found to exceed one year. EMi55ions from operations in the CAR mads~ are shown in Table 1. The data art- abstracted from a report submitted to