The requested variance is from the second sentence of Rule 406:
“Sources discharging to fthe Illinois River and whose untreatedwasteload cannot be computed on a population equivalent basis comparable to that used for municipal waste treatment plants and whoseammonia nitrogen discharge exceeds 100 pounds per day shall notdischarge an effluent of more than 3.0 mg/l of ammonia nitrogen.”The Board previously granted Du Pont a variance from Rule 406 (PCB76—30, 30 ...
Allowed
wileys
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