As public and regulatory pressure is exerted on POTWs brought on by their own compliance problems and need to upgrade facilities without adequate funding, they are starting to look to their industrial users for additional fees and/or upgraded industrial wastewater pretreatment. Some of the following discussion may be a rehash, but we are seeing more frequent issues and questions arising from members on these issues.
 
The old standbys in wastewater treatment include Mass vs. Concentration, pH limits, grab samples and a state inspector wanting to know whether or not your disposable sludge is hazardous. There are facts ...