EPA Finalizes Revisions to Stormwater Permitting Rule for Construction Sites

Posted on April 21, 2014 by Daniel Riesel

 

New EPA Rule to Have Broad Implications for Construction Industry; Describes Required Best Management Practices for Stormwater

 

EPA recently finalized revisions to the effluent limitations rules for the Construction and Development (“C&D”) point source category under the Clean Water Act. The revisions will take effect on May 5th, and reflect the terms of a settlement agreement between EPA and the Wisconsin Builders Association, the National Association of Home Builders, and the Utility Water Act Group. See Wisconsin Builders Association v. EPA, No. 09-4413 (7th Cir. 2012). 

The groups challenged EPA’s 2009 Effluent Limitations Guidelines for the Construction and Development Industry, known as the 2009 C&D Rule, arguing that the rule was unworkable and reflected incorrect calculations, and that compliance could cost stakeholders up to $10 billion annually.

The new revisions to the C&D rule eliminate the numeric limitations for turbidity in stormwater discharges from construction sites, in favor of non-numeric effluent controls and best management practices for reducing the effects of erosion and scour on water quality.  EPA had previously included numeric limitations for turbidity in its 2009 C&D rule but had stayed implementation of those limitations as a result of several legal challenges to the rule. 

The C&D rule has wide-ranging applicability, as it typically covers construction activities such as clearing, grading, and excavating at sites where one or more acres of land will be disturbed.  Improperly managed soil at construction sites can easily be washed off during storms and has the potential to negatively impact nearby water bodies. 

Under the stormwater permitting rule, construction site owners and operators are generally required to:

  • implement erosion and sediment controls;
  • stabilize soils;
  • manage dewatering activities;
  • implement pollution prevention measures;
  • provide and maintain buffers around surface waters;
  • prohibit certain discharges, such as motor fuel and concrete washout; and
  • utilize surface outlets for discharges from basins and impoundments.

The new revisions to EPA's stormwater permitting standards may have implications for states that have issued construction-related stormwater permits since 2009. For projects in New York State, for example, the Department of Environmental Conservation Construction General Permit (“CGP”) expires in 2015; any necessary updates to the CGP resulting from the EPA C&D rule are likely to be incorporated into the revised CGP permit due in 2015.



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