WEF Wet Weather Management Guidance: Risk Based Objectives
The Water Environment Federation (WEF), under a Water Quality Cooperative Agreement with the U.S. Environmental Protection Agency, is developing a WEF guidance document focused on effective practices for managing peak wet weather flows at municipal wastewater treatment facilities. The wastewater industry has long been researching, documenting, and planning for wet weather flows for municipal wastewater collection and treatment facilities. Available literature on relevant topics has multiplied since promulgation of the federal CSO Control Policy and the commissioning of the urban wet weather advisory structure under the Federal Advisory Committee Act (Urban Wet Weather FACA). With this document, WEF documents the state-of-practice with respect to wastewater conveyance and treatment system planning, design, construction, and operation and maintenance for peak wet weather flows. The document suggests a comprehensive risk based approach to setting objectives relevant to planning and selection of alternatives to comply with Clean Water Act wet weather requirements.