327 IAC 5-17-18 "Pretreatment" defined

Sec. 18. "Pretreatment" means the reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to, or in lieu of, discharging or otherwise introducing such pollutants into a POTW. The reduction or alteration can be obtained by physical, chemical, or biological processes, process changes, or by other means, except dilution, as prohibited by 327 IAC 5-18-4(f).