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EPA Audit/Reporting

The U.S. Environmental Protection Agency (EPA) conducted, from August 9 through 12, 2011,
an audit of the Nevada Department of Transportation (NDOT) Municipal Separate Storm Sewer
System (MS4) Program. The audit assessed compliance with NDOT's 2010 MS4 permit and evaluated NDOT's
implementation of its 2005 statewide Stormwater Management Plan (SWMP), as required by
the previous permit, issued in 2004.

The 2004 and 2010 Permits prescribe specific requirements
for SWMP elements and timelines for implementation. The 2005 SWMP details practices and
procedures NDOT uses to control the discharge of pollutants in stormwater.
EPA reviewed documents, met and interviewed staff to gather information on overall program
management, and conducted field inspections at NDOT construction sites and maintenance
facilities. Nevada Division of Environmental Protection (NDEP) accompanied EPA throughout
the audit. At the conclusion of the audit, EPA shared an initial assessment with the NDOT

This report includes background information and presents audit findings which are separated into
four categories: noteworthy program elements; recommendations for improvements; program
deficiencies; and potential permit violations.

NDOT submitted a written response to the US EPA Audit Report dated June 26, 2012, addressing the potential
permit violations noted during the 2011 audit.

EPA Audit Report

NDOT Response