National Pollutant Discharge Elimination System (NPDES) Phase II
The 1987 amendments to the Clean Water Act required the United States Environmental Protection Agency (USEPA) to address storm water runoff in two phases. Phase I of the National Pollution Discharge Elimination System (NPDES) Storm Water Program became effective in 1990. Phase I of the NPDES Storm Water Program applied to large and medium MS4s and construction sites disturbing between 1 and 5 acres of land. Phase II also expands the industrial "no exposure" exemption from Phase I. The Illinois Environmental protection Agency (IEPA) is in charge of implementing both phases of the NPDES Storm Water Program.
As a small MS4, the City was required to comply with Phase II of the NPDES Storm Water Program by submitting a Notice of Intent (NOI) to IEPA by March 10, 2003. The NOI serves as the application documentation for the NPDES Phase II Permit that applies to storm water discharges from storm sewers and drainage ways within the City's jurisdiction for a permit period of five (5) years. The NOI outlined a plan if followed; outlined implementation for six minimum control measures with a target to improve storm water quality. Those six minimum control measures are:
1. Public Education and Outreach
2. Public Participation and Involvement
3. Illicit Discharge Detection and Elimination
4. Construction Site Runoff Control
5. Post-construction Runoff Control
6. Pollution Prevention and Good Housekeeping
In March 7, 2003, the City submitted their Notice of Intent (NOI) to IEPA. It called for the City to implement sixteen (16) Best Management Practices (BMPs). On September 21, 2004, the City received their General NPDES Permit (No. ILR40) This permit was issued based on the proposed City schedule in the NOI. The reporting period of this permit is from March 1, 2003 to February 29, 2008.
The Phase II stormwater permit will, at a minimum require the City to develop, implement, and enforce a stormwater management program designed to reduce discharge of pollutants from the City municipal separate storm sewer system to the "maximum extent practicable" to protect water quality.