Storm Water Retrofitting

Dan Bogoevski, Ohio EPA September 2011

What Is a Storm Water Retrofit?

   Retrofitting is Installation of storm water best management practices in areas where none previously existed, or Improvement of existing storm water management practices so that they provide a water quality function Sterncrest Road – Orange Village Crocker Rd Detention Basin - Westlake

Typical Practices Used in Retrofitting

Traditional Detention Pond Before Retrofit Detention Basin After Retrofit with Water Quality Enhancements Photos Courtesy of Rutgers University

Typical Practices Used in Retrofitting

Green Roof Rain Barrel Pervious Pavement Rain Garden

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Goals of Storm Water Retrofitting

Correction of prior design or performance deficiencies Flood mitigation Disconnection of impervious surfaces Improving groundwater recharge and infiltration capacity Addressing pollutants of concern Demonstrating new technologies Supporting stream restoration activities University Hts Service Garage

University Heights Service Garage

How Retrofitting Fits Your MS4 Program

    New development and redevelopment ≥ 1 acre must include water quality practices Local ordinance must meet or exceed Ohio EPA General Storm Water NPDES Permit for Construction Activities #OHC000003 Update required within 2 years of your permit renewal date  That was June 2011 for most MS4s   MS4s encouraged to retrofit as opportunity arises Incorporate into flood management projects Is a primary tool to meet objectives of MCM #5 for communities with little to no new development or redevelopment

Future EPA Rulemaking and MS4s

    Federal rulemaking will impact your MS4 program Retrofit plan is an expected requirement in next MS4 permit   For municipal properties only SWIF grants from Ohio EPA paid for some of the projects we will see on tour Effluent Limitation Guidelines for Post-Construction  Expected to require on-site management of runoff up to a certain design storm  Where infeasible on-site, developers will look for off-site mitigation or pay in lieu fees for retrofit projects  MS4s will be required to update local storm water ordinances to meet these minimum requirements Proposed rule to be released September 2011 and expected to go final Nov 19, 2012

Retrofitting Beyond the MS4 Permit

    Can reduce the volume of storm water entering sanitary sewer systems Reduces the frequency and volume of combined sewer overflows Reduces or eliminates causes of separate sewer overflow   TMDLs are focusing on storm water solutions Tinkers Creek nutrient trading program to reduce phosphorus  NPDES permits for WWTPs require either plant upgrade to meet more stringent P limit or storm water retrofit with green infrastructure to meet goals established in TMDL Requirements within the Chagrin and Grand River watersheds  NPDES permits for construction expected to place focus on LID practices

For More Information

Ohio EPA Northeast District Office MS4 Contacts  Dan Bogoevski (330) 963-1145 Cuyahoga, Geauga, Lake, Lorain, Wayne Chris Moody (330) 963-1118 Ashtabula, Mahoning, Medina, Trumbull Phil Rhodes (330) 963-1136 Portage, Stark, Summit Joe Trocchio (330) 963-1193 Columbiana    Online at Storm Water Program   www.epa.ohio.gov/dsw/storm/index.aspx

www.epa.gov/npdes/stormwater Webcast “The Art and Science of Storm Water Retrofitting”  www.epa.gov/npdes/training Managing Wet Weather with Green Infrastructure  http://cfpub.epa.gov/npdes/home.cfm?program_id=298