Friday, April 15, 2011

EPA Proposed Storm Water Discharge Permit For Construction Sites

U.S. Environmental Protection Agency (EPA) is asking for public comment its draft permit regulating the discharge of stormwater from construction sites. The proposed Construction General Permit (CGP) includes a number of new requirements on owners and operators of construction sites, including new provisions to protect impaired and sensitive waters. The current permit is scheduled to expire on June 30, 2011; however, EPA is proposing to extend the current permit until January 31, 2012 to provide sufficient time to finalize the new permit.

Some of the significant proposed permit modifications include new requirements for:

  • Eligibility for emergency-related construction

  • Required use of the electronic notice of intent (NOI)process

  • Sediment and erosion controls

  • Natural buffers or alternative controls

  • Soil stabilization

  • Pollution prevention

  • Site inspections

  • Stormwater Pollution Prevention Plans (SWPPP)

  • Permit termination (NOT)

Many of the new permit requirements implement new effluent limitations guidelines and new source performance standards for the construction and development industry that became effective on February 1, 2010. These requirements include a number of erosion and sediment controls and pollution prevention measures that apply to all permitted construction sites.

The permit will be effective in areas where EPA is the permitting authority, including four states (Idaho, Massachusetts, New Hampshire and New Mexico); Washington, D.C.; most territories; and most Indian country lands. However, in practice, EPA general permits are used by authorized States as a template for revised State general NPDES permits, and therefore, conditions of the EPA permit will likely be reflected in State permits in the future.

The public will have 60 days to comment on the draft permit. EPA anticipates that it will issue the final construction general permit by January 31, 2012.

Caltha LLP provides expert consulting services to public and private sector clients nationwide to address Stormwater Permitting & Regulatory Support, Stormwater Pollution Prevention Plans (SWPPP), Stormwater Monitoring and Stormwater Training.

For further information contact Caltha LLP at or Caltha LLP Website

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