The initial variance, PCB 7i~-ll0, limited the discharge
of mercury to an average of 0.5 lb/day; the next variance,PCB 72~336, limited the discharge to 0.33 lb/day, based on asix~monthmoving average, but not to exceed 0.5 pound in any24-hour period, and the most recent variance, PCB 73~320,limited the discharge to 0.25 lb/day, based on a six~monthmoving average but not to exceed 0,4 pounds in any 24~-hourperiod.
A public hearing was held on February 26, 1975 in
Belleville at which three representatives from Monsantotestified.
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