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