Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

When the collection system experiences a performance exception event such as a release of wastewater to the surrounding environment, the release can pose health and environmental risks. The realrisk of a sanitary sewer overflow (SSO) is complex and depends on whether the concern is directedtoward, for example, human health, the environment, or customer services. Municipalities recognize that the strict regulatory interpretation of the Clean Water Act (CWA) regarding SSOs puts municipalities in a difficult situation given the number of system flow issues that are not under thedirect control of the municipality. Municipalities have difficulty balancing capacity versus system flows, particularly wet weather flows. At the urging of a number of municipalities, the U.S. Environmental Protection Agency (EPA) established a Federal Advisory Committee (FAC) of key stakeholders to make recommendations about how the National Pollutant Discharge Elimination System (NPDES) should address SSOs. In 1995, EPA chartered an Urban Wet Weather Flows Federal Advisory Committee that formed an SSO Subcommittee, and later, the FAC produced a framework to address SSOs that formed the basis for EPA's proposed SSO Rule. The proposed SSO Rule provided a consensus approach to strategic planning to address SSOs. It did not provide a clear approach about how to setthecapacity of a system. Wastewater planners traditionally have used approaches that addressed primarily dry weather, steady-state conditions and often did not coordinate flows between the collection and treatment systems. EPA has held several dialogues regarding the management of wet weatherflows, and with the possible exception of the Combined Sewer Overflow (CSO) Control Policy there has been no definitive national guidance on planning for wet weather and selecting feasible andinfeasible capacity strategies. The recent Water Environment Federation (WEF) publication,Guide to Managing Peak Wet Weather Flows in Municipal Wastewater Systems (Guide), presentsa wastewater collection and treatment system capacity sizing approach for planning. The Guide introducesa Risk Management Approach for selecting the system capacity that supports community values an strategies. The Risk Management Approach includes a six-step structured process that uses stakeholder input to develop and compare competing community values. The six-step process is modeled afterthe risk-based model developed by the American Water Works Association Research Foundation (AWWARF). The planning outcome of the Risk Management Approach is a regulatory compliance approach thatleads to the selection of a defendable system capacity that measures risks (such asSSOs) to community values.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2006-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more