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Storm Water RetrofittingDan 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
EnhancementsPhotos Courtesy of Rutgers University
Use Existing
Infrastructure
Typical Practices Used in Retrofitting
Rain Barrel
Pervious Pavement
Green Roof
Rain Garden
Add Green
Infrastructure
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
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
Ohio EPA Northeast District Office MS4 Contacts
Dan Bogoevski (330) 963-1145 Cuyahoga, Geauga, Lake, Lorain, WayneChris Moody (330) 963-1118 Ashtabula, Mahoning, Medina, TrumbullPhil Rhodes (330) 963-1136 Portage, Stark, SummitJoe Trocchio (330) 963-1193 Columbiana