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Construction Site Storm Water Runoff Control
Storm drainUncontrolled stormwater runoff from construction sites can significantly impact our streams, rivers and lakes.  Erosion and sedimentation from construction sites can lead to reduced water quality and other environmental problems.
 
The construction process can create a significant amount of silt and sediment in a short period of time.  The primary method to control storm water discharges is through the use of best management practices (BMPs) to reduce pollutants in any storm water runoff.
 
To limit the negative impacts of construction projects on Ohio's waters, the Ohio EPA Division of Surface Water administers a permitting program designed to document construction activity in the state and require practices that keep pollutants out of the streams. The permitting program is mandated by the Clean Water Act and is part of the NPDES (National Pollutant Discharge Elimination System) program.  Construction activities disturbing one or more acres of total land, or will disturb less than one acre of land but are part of a larger common plan of development or sale that will ultimately disturb one or more acres of land will need a permit to discharge storm water from the site.  Most sites get permit coverage under the Ohio EPA's Construction General Permit #OHC000004 for discharge of storm water associated with construction activity.
 
The Storm Water Pollution Prevention Plan (SWP3) and the design of Construction Site storm water controls shall be in accordance with the Ohio EPA’s Construction General Permit #OHC000004, the City of Oregon’s Storm Water Management Plan, Codified Ordinances of Oregon, Ohio Section 1177.06 Storm Sewers and the City of Oregon's Storm Water Requirements for Site Plan Development.

Construction General Permit (CGP)

Construction site storm water runoff is regulated by the OHIO ENVIRONMENTAL PROTECTION AGENCY AUTHORIZATION FOR STORM WATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY UNDER THE NATIONAL DISCHARGE ELIMINATION SYSTEM (Ohio EPA Permit No.: OHC000004). This current permit came into effect on April 21, 2013 under the Ohio EPA's Constuction Storm Water Program.  The NOI application must be submitted at least 21 days prior to the initiation of construction activities and requires that a SWP3 be completed prior to the submittal of the NOI application.

Notice of Intent

According to the Ohio EPA Permit No. OHC000004, “Operators that discharge storm water associated with construction activity must submit an NOI application form in accordance with the requirements of Part II of this permit to obtain authorization to discharge under this general permit.” The Notice of Intent (NOI) can be found on the Ohio EPA Division of Surface Water’s website Program Forms and Permits

Storm Water Pollution Prevention Plan

A Storm Water Pollution Prevention Plan (SWP3) shall be developed for construction activities disturbing one or more acres of total land, or will disturb less than one acre of land but are part of a larger common plan of development or sale that will ultimately disturb one or more acres of land. The SWP3 will need to be developed to ensure the implementation of BMPs that reduce pollutants in storm water discharges during construction and pollutants associated with post-construction activities. The SWP3 must contain a description of the post-construction BMPs that will be installed during construction for the site and the rationale for their selection to meet water quality standards in OAC Chapter 3754-1.
 
The SWP3s shall be prepared in accordance with sound engineering and/or conservation practices by a professional experienced in the design and implementation of standard erosion and sediment controls and storm water management practices addressing all phases of construction. The SWP3 shall identify potential sources of pollution which may reasonably be expected to affect the quality of storm water discharges from the site. Detailed drawings and a maintenance plan shall be provided for all post-construction BMPs as part of the SWP3. Maintenance plans shall include a list of the responsible parties for each maintenance requirement and their contact information, proposed maintenance intervals, and a disposal plan for any material removed from the BMP. If maintenance of post-construction BMPs is to be contracted, a copy of the maintenance contract shall be included.
 
The SWP3 shall fulfill the requirements of the Ohio EPA Permit and must be retained at the construction site at all times during the construction activity. 

Construction Site Inspection

The Ohio EPA Permit No. OHC000004 states, “At a minimum, procedures in an SWP3 shall provide that all controls on the site are inspected at least once every seven calendar days and within 24 hours after any storm greater than one-half inch of rain per 24 hour period.”
 
Inspections of construction BMPs are required to be performed by "qualified inspection personnel" to ensure that the control practices are functional and to evaluate whether the SWP3 is adequate and properly implemented in accordance with the schedule. The Construction Site Inspection Checklist can be utilized to assure that all Best Management Practices all working properly.
 
All temporary and permanent control practices shall be maintained and repaired as needed to ensure continued performance of their intended function. All sediment control practices must be maintained in a functional condition until all up slope areas they control are permanently stabilized.
 

Erosion and Sediment Control Basic Principles

  1. Install BMPs to control erosion and sediment and manage storm water.
  2. Minimize open area by phasing or sequencing construction and preserving existing vegetation where possible.
  3. Divert storm water away from disturbed or exposed areas when possible.
  4. Inspect the site regularly and properly maintain BMPs, especially after rainstorms.
  5. Revise the plan as site conditions change during construction and improve the plans if BMPs are not effectively controlling erosion and sediment.
  6. Keep the construction site clean by putting trash in trash cans, keeping storage bins covered, and preventing or removing excess sediment on roads and other impervious surfaces.

Erosion and Sediment Control for Small Lot Construction

Per Ohio EPA, “For residential or commercial developments with sublots, NPDES permit coverage must be continued on every lot until the lot achieves final stabilization as defined in Part VII of the CGP. For developments with a centralized control (i.e., sediment settling ponds or inlet protection), which receives drainage from multiple lots, the developer may be required to maintain the centralized control until all of the homes are built with the land temporarily stabilized.”
The Ohio EPA requires, “If a developer opts to transfer permit responsibility to the new lot owner or operator building the structure (homebuilder) once the lot is sold, the new lot owner must submit an Individual Lot Notice of Intent application at least 7 days prior to initiating construction activities. The developer must allow the new lot owner access to the developer’s SWP3. The new owner must then maintain and/or install any lot specific sediment controls and develop a site map indicating the location of the BMPs. Once the Individual Lot NOI is processed, the new lot owner is responsible for complying with the CGP on his or her lot."
The City of Oregon issued requirements for erosion and sediment control for small lot construction sites on January 30, 2004.

Design Resources

“Ohio EPA recommends that the erosion, sediment, and storm water management practices used to satisfy the conditions of this permit (CGP), should meet the standards and specifications in the current edition of Ohio’s Rainwater and Land Development manual.
The City of Oregon also uses the Storm Water Management Standards Manual, Second Edition, September 2006, by the Maumee River Regional Storm Water Coalition and the Maumee River RAP Urban Runoff Action Group, as a guide in storm water design.
 
© 2015 City of Oregon