Tag: AHLs


Determination the need for Local Limits

As previewed in my previous blog, this blog entry contains a brief description of determination of the need for local limits development for a particular pollutant of concern (POC). In making this evaluation, POTWs should consider: Historical Issues. Pollutants causing pass through or interference. Degree to which current loadings approach calculated MAHLs Specific pollutants that states require POTWs to […]


Local Limits: Determination of Suitable Environmental Criteria

This part of my series of blog entries gives a brief idea on the Environmental Criteria to be considered for the calculation of Allowable Headworks Loading (AHL). For each pollutant of concern identified, the POTW should examine the appropriate Environmental Criteria to protect against interference and pass through. From these criteria, along with the flow rates and removal […]