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Chapter Seven

Chapter 7 -  Post-Construction Run-off Control MCM 

7.0         Introduction 

This chapter describes the post-construction run-off control minimum control measure, the fifth of six measures the operator of a Phase II regulated small municipal separate storm sewer system (MS4) is required to include in its stormwater management program to meet the conditions of its National Pollutant Discharge Elimination System (NPDES) permit.   

Post-construction stormwater management in areas undergoing new development or redevelopment is necessary because run-off from these areas has been shown to significantly affect receiving waterbodies.  Many studies indicate that prior planning and design for the minimization of pollutants in post-construction stormwater discharges is the most cost-effective approach to stormwater quality management. 

Each section of this plan describes a Best Management Practice (BMP).  Each BMP is accompanied by its own implementation schedule.  The implementation schedule informs the MS4 Operator and their designated personnel of the tasks to complete for each year.  The MS4 Operator will require that the parties responsible for each post-construction site stormwater run-off control record and report annually on the items to be tracked so that the MS4 Operator may include them in the annual report to IDEM. 

Measurable Goal: The post-construction stormwater run-off control program aims to reduce the amount of total suspended solids leaving any new site development after construction has been completed by 80%.  The goal is to achieve 80% reduction for all new site developments required to gain local approval. 

The following is the post-construction stormwater run-off control program. 

7.1         Development of a Regulatory Mechanism        

The purpose of the regulatory mechanism for post-construction stormwater run-off control is to establish minimum stormwater management requirements and controls to protect and safeguard the general health, safety, and welfare of the public residing in watersheds within the MS4 area once construction activities have ceased. 

The City of Logansport will use an overall Stormwater Ordinance with a Chapter titled Control of Post Construction Stormwater Runoff for its regulatory mechanism.  Through the Ordinance the MS4 Operator will implement planning procedures to promote improved water quality.   

Planning procedures will include, at a minimum, the post-construction requirements of 327 IAC 15-5-6.5(a)(8).  The Ordinance may also include the implementation of the following planning procedures identified in Rule 13 (327 IAC 15-13-16(b)). 

  • Buffer strip preservation and riparian zone preservation;

  • Creation of filter strips;

  • Minimization of land disturbance;

  • Minimization of impervious surfaces;

  • Disconnecting impervious surfaces;

  • Maximization of open spaces; and

  • Avoiding sensitive areas.

7.1.1    Implementation Schedule 

The implementation of the City's post-construction run-off control regulatory mechanism otherwise referred to as the Post-Construction Run-off Control  Chapter of the Stormwater Ordinance will be the responsibility of the MS4 Operator who will pursue the following schedule:  

Year 1 (ending Nov 2004):  Develop a draft Chapter for post-construction runoff.  The City will submit the draft Chapter to DNR for their review and comments. 

Year 2 (ending Nov 2005):  Update the Post-Construction Run-off Control Chapter as necessary. The City will then adopt the Chapter as part of the Stormwater Ordinance before November 1, 2005, and complete a certification form that combines the completed requirement of this subsection and subsection 7.4, the development of an Operational and Maintenance Plan for all structural BMPs.   

Year 3 (ending Nov 2006):  Review the Post-Construction Run-off Control Chapter and note any suggested improvements.  Update the Chapter and amend the Stormwater Ordinance as necessary. 

Year 4 (ending Nov 2007):  Review the Post-Construction Run-off Control Chapter and note any suggested improvements.  Update the Chapter and amend the Stormwater Ordinance as necessary. 

Year 5 (ending Nov 2008):   Review the Post-Construction Run-off Control Chapter and note any suggested improvements.  Update the Chapter and amend the Stormwater Ordinance as necessary. 

7.1.2    Items to be Tracked 

The following items will be recorded on the corresponding reporting form located at the end of this chapter.

  • Number and names of new employees trained in stormwater quality related policies and procedures; and

  • Number and names of current employees trained in stormwater quality related policies and procedures.

7.2         Site Plan Review Process

The site plan review process will be generally described in the Ordinance and more detail will be provided in the City of Logansport's Development Manual. 

The site plan review process will be written to be in accordance with 327 IAC 15-13 and 327 IAC 15-5.  According to 327 IAC 15-13, the permitting process and associated timetables for site plan and application submittals listed in 327-IAC 15-5 do not have to be followed.  The City of Logansport will develop standardized timetables for all site plan reviews and application submittals. 

The City of Logansport has not delegated responsibility to the SWCD to review all site plans submitted and inspect all sites.  Logansport has retained this responsibility. However, the City will give the SWCD the opportunity to review each of these plans prior to the City's approval of the submitted plans.  Failure of the SWCD to respond within a predetermined time period should not delay final action of the MS4 Operator to approve plans. 

After the City gives approval, the construction site operator is responsible to submit a Notice of Intent (NOI) Letter to IDEM. 

For the duration of the permit term, the SWCD will be given the opportunity to review and inspect all MS4 operated projects.  Examples of MS4 operated projects include but are not limited to new road and utility projects.  Only after the local SWCD Director gives written permission to the City giving them the authority to perform self monitoring will the MS4 Operator will no longer be required to submit MS4 operated projects to the SWCD for their review. 

According to IAC 15-5, all site plan submittals must include a post-construction stormwater pollution prevention plan.  In addition to the post-construction stormwater pollution prevention plan requirements in IAC 15-5, the MS4 Operator, where appropriate, will require the use of any combination of storage, infiltration, filtering, or vegetative practices to reduce the impact of pollutants in stormwater run-off on receiving waters.  In addition to combining any 's of the above mentioned practices, the following requirements will be followed: 

  • Infiltration practices will not be allowed in well-head protection areas;

  • Discharges from an MS4 area will not be allowed in sink holes or fractured bedrock without treatment that results in the discharge meeting Indiana ground water quality standards as referenced in 327 IAC 2-11;

  • Any stormwater practice that is a Class V injection well must ensure that the discharge from such practices meets Indiana ground water quality standards as referenced in 327 IAC 2-11;

  • As site conditions allow, the rate at which water flows through the MS4 conveyances will be regulated to reduce outfall scouring and stream bank erosion;

  • As site conditions allow, a vegetated filter strip at the appropriate width will be maintained along unvegetated swales and ditches;

  • New retail gasoline outlets, new municipal, state, federal, or institutional refueling areas, or outlets and refueling areas that replace their existing tank systems will be required by MS4 ordinance or other regulatory means to design and install appropriate practices to reduce lead, copper, zinc and polyaromatic hydrocarbons in stormwater run-off.

The City will review all projects within the MS4 area.  They may choose to review projects within the extra-jurisdictional area and provide comments to the extra-jurisdictional review authorities for their consideration. 

The MS4 Operator will be required to submit a monthly summary report of construction projects to IDEM.  This certification form is located in Appendix F, State Form 51276 (R3/ 11-03). 

7.2.1      Implementation Schedule 

The implementation of the development of Site Plan Review Process will be the responsibility of the MS4 Operator who will pursue the following schedule: 

Year 1 (ending Nov 2004):  Incorporate stormwater quality plan review with current plan review procedures for all site plans and site inspections, as described above and in the City of Logansport's Development Manual. 

Year 2 (ending Nov 2005):  Review the site plan review process for all site plans and site inspections and update as necessary. 

Year 3 (ending Nov 2006):  Review the site plan review process for all site plans and site inspections and update as necessary. 

Year 4 (ending Nov 2007):  Review the site plan review process for all site plans and site inspections and update as necessary. 

Year 5 (ending Nov 2008):  Review the site plan review process for all site plans and site inspections and update as necessary. 

7.2.2      Items to be Tracked 

The following items will be recorded on the corresponding reporting form located at the end of this chapter. 

  • Number of reviews by the SWCD; 

  • Number of sites authorized for stormwater quality; 

  • Number of sites inspected; 

  • Number, type, and location of structural BMPs installed; 

  • Type and location nonstructural BMPs utilized; 

  • Estimated acreage or square footage of open space preserved and mapped; 

  • Estimated acreage or square footage of mapped pervious and impervious surfaces; and 

  • Number and location of retail gasoline outlets or municipal, state, federal, or institutional refueling areas with installed BMPs.

7.3         Annual Training of MS4 Personnel 

Current Employees: Current employees responsible for plan review, inspection, and enforcement of post-construction BMP's shall receive, at a minimum, annual training addressing such topics as appropriate control measures, inspection protocol, and enforcement.  This training will involve instruction on inspection frequency, maintenance procedures, operational testing or observations to ensure proper functioning, preventative maintenance and record keeping.  This training will be documented.  The documentation will be retained by the City. 

During subsequent years, employees will be required to complete an annual refresher training program.  This training will be documented.  The documentation will be retained by the City. 

New Employees:  New employees responsible for plan review, inspection, and enforcement of post-construction BMP's shall receive, at a minimum, annual training addressing such topics as appropriate control measures, inspection protocol, and enforcement.  This training will take place within the first two months of employment.  This training will involve instruction on inspection frequency, maintenance procedures, operational testing or observations to ensure proper functioning, preventative maintenance and record keeping.  This training will be documented.  The documentation will be retained by the City.

7.3.1      Implementation Schedule 

The implementation of training for MS4 personnel will be the responsibility of the MS4 Operator who will pursue the following schedule: 

Year 1 (ending Nov 2004):  Approve the development of annual training for MS4 personnel on post-construction stormwater run-off controls, as described above. 

Year 2 (ending Nov 2005):  Develop and implement training policy and procedures for personnel training on post-construction stormwater run-off controls.  Begin training employees. 

Year 3 (ending Nov 2006):  Continue training employees. 

Year 4 (ending Nov 2007):  Continue training employees. 

Year 5 (ending Nov 2008):  Continue training employees.  Evaluate the policies, procedures, and training methods; and begin implementing recommended changes. 

7.3.2      Items to be Tracked 

The following items will be recorded on the corresponding reporting form located at the end of this chapter. 

  • Number and names of new employees trained in stormwater quality related policies and procedures; and

  • Number and names of current employees trained in stormwater quality related policies and procedures.

7.4         Development of an Operational and Maintenance Plan for All Structural BMPs

The MS4 Operator will develop and implement a written operational and maintenance plan for all major structural stormwater BMPs.  Operational and Maintenance plans for specific structural BMPs will be described in detail in the City of Logansport's Development Manual. 

Major Structural BMPs included in the Development Manual include, but are not limited to, detention basins and retention basins.

In situations where the structural BMP is privately owned, the maintenance and operation of the BMP is the responsibility of the private owner.  In accordance with a maintenance agreement that will be established in the Post-Construction Run-off Control Ordinance, the private owner will be required to properly maintain and operate the BMP in accordance with the Stormwater Standards included in the Development Manual.

The plan for all MS4 operational areas will also include the following: 

Inspection Frequency: Major structural stormwater BMPs such as detention and retention basins will be inspected, at the minimum, on an annual basis to document maintenance and repair needs.  Catch basins will be inspected in accordance with Section 8.1.2 of Chapter 8 Pollution Prevention and Good housekeeping MCM.   

Maintenance Procedures: Maintenance and repair needs identified during inspections will be addressed in a timely manner.  These needs may include preventative maintenance activities such as the removal of silt, litter and other debris, and grass cutting or vegetation removal. 

Recordkeeping: All actions taken as required by this plan will be documented.  These actions include, but are not limited to, records of installation or maintenance activities and inspection reports.  The documentation will be retained by the City.  This plan will be reviewed for adequacy and accuracy at a minimum of every five years.  Any changes to the plan will be documented and incorporated into the annual report. 

7.4.1        Implementation Schedule 

The implementation of the Operation and Maintenance Plan will be the responsibility of the MS4 Operator who will pursue the following schedule: 

Year 1 (ending Nov 2004):  Begin the development of an operational and maintenance plan for all structural BMPs, as described above.

Year 2 (ending Nov 2005):  Complete the plan and a certification form that combines the completed requirement of this subsection and subsection 7.1, the Development of a Regulatory Mechanism.   

Year 3 (ending Nov 2006):  Review the operation and maintenance plan and note any suggested improvements.  Update plan if necessary. 

Year 4 (ending Nov 2007):  Review the operation and maintenance plan and note any suggested improvements.  Update plan if necessary. 

Year 5 (ending Nov 2008): Review the operation and maintenance plan and note any suggested improvements.  Update plan if necessary. 

7.4.2        Items to be Tracked 

The following items will be recorded on the corresponding reporting form located at the end of this chapter. 

  • Number, type, and location of structural BMPs inspected; and 
     

  • Number, type, and location structural BMPs maintained, or improved to function properly.

  • Number of stormwater drains stenciled, decaled or cast.

 

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Logansport Municipal Utilities
601 East Broadway #101
Logansport, Indiana 46947

Telephone: (574) 753-6231
Fax: (574) 753-9828
lm.ut@verizon.net

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