Tag: MAILs

Local Limits Allocation Methods and Duration

As I mentioned in my previous blog, POTWs should choose an allocation method that best fits their situation, prevents pass through or interference, and complies with the federal and state regulations. It can choose one approach for some pollutants and another approach for other pollutants, depending on the loading available and the number of industrial […]

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 […]


This installment of my blog series will give you a brief idea on the calculation of MAHLs. MAHL is an estimate of the upper limit of pollutant loadings to a POTW intended to prevent pass through or interference. MAHLs are the basis for local limits and are calculated in three steps: Calculate POTW removal efficiency for […]

Local Limits: Review and Analysis of Data

As mentioned in my previous blog, this blog entry looks at the review and analysis of data collected in order to develop Local Limits. Sampling data evaluations may reveal improperly collected data, elevated detection limits and new POCs. If data has been improperly collected, POTWs will want to educate the responsible person on data collection […]