Individual Lagoon Tool
About this Resource:
The Individual Lagoon Tool (ILT) is a screening-level economic analysis tool to help determine whether a water quality standards (WQS) variance for ammonia based on “substantial and widespread economic and social impacts” (i.e., 40 CFR 131.10(g)(6) or “Factor 6”) may be appropriate. This tool is specific to lagoon wastewater treatment systems with design flow between 0.01 and 2 million gallons per day (MGD).