Alcoa's Primary Metals USMS Operations has been a participant in the Voluntary Aluminum Industrial Partnership since the program's beginning. Excellent progress has been achieved in reducing anode effects from the 1990 baseline year defined by the program. Anode effect frequency has been reduced by 63% through 1996 against an overall target of 70% by the year 2000. An active PFC measurement program has also been carried out over this period to audit expected reductions of PFCs with reduced anode effects. Data is presented from measurements at five separate locations using three separate cell technologies. These data along with other data from the EPA sponsored measurements and data reported in the literature offer new insights into PFC emissions.
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