January 28, 2008 ODOT Central Office – Room 1C Post-Construction BMPs Update Meeting.

January 28, 2008ODOT Central Office – Room 1C

Post-Construction BMPs

Update Meeting

Post-Construction BMPs

Introductions

Bill Ujvari, P.E. – Production Administrator, Central Office Production

Mike Wawszkiewicz, P.E. – Hydraulic/Roadway Designer, Central Office Production

Please feel free to ask questions during the presentations.

L&D Manual, Volume 2 Revisions

Revisions published January 18, 2008 Today’s Topics

Implementation Plan – IOC (included in hand-outs)

Notable revisions to post-construction BMP Sections in the L&D Manual

Local-let and ODOT-let BMP BMP Design Approach BMP Submittals to Central Office OEPA Notices of Violation Training Needs

Implementation Plan –Projects Scoped after January 18, 2008

Include post-construction BMP based on January 2008 L&D Manual, Vol. 2

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Follow these steps:

Step 1 Determine if post-construction BMP are

needed based on January 2008 L&D Manual, Vol. 2

If post-construction BMP needed, continue to Step 2

If post-construction BMP are not needed, no further action needed

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Step 2 Determine the answers to the following:

Has the project received Stage 1 plan approval prior to January 18, 2008?

If there was no Stage 1 submittal, has the project received Stage 3 plan approval prior to January 18, 2008?

Were the right-of-way tracings completed prior to January 18, 2008?

If “No” to all of the above, design BMPs according to the January 2008 L&D Volume 2

If “Yes” to any of the above, continue to Step 3

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Step 3 Is existing and/or proposed right-of-way

available to incorporate post-construction BMPs meeting the January 2008 L&D Volume 2 BMP requirements for all or part of the project?

If “Yes”, incorporate BMPs according to the January 2008 L&D Volume 2 and continue to Step 4

If “No”, continue to Step 4

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Step 4 Based on BMPs incorporated within

available existing and/or proposed right-of-way in Step 3, is the project 100% compliant with the January 2008 L&D Vol. 2?

If “Yes”, no further action needed If “No”, continue to Step 5

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Step 5 Document restrictions preventing full

compliance with the January 2008 L&D Vol. 2.

Cost and Schedule Impacts Percent of project treated with BMPs Environmental and Right-of-way impacts Other Impacts

Implementation Plan –Projects Scoped Prior to Jan. 18, 2008

Step 5 cont. Submit documentation to Central Office

Production for coordination with Ohio EPA

Ohio EPA will consider each project with ODOT and determine possible options that will resolve non-compliant areas of a project

Global settlement Mitigation within the same watershed

Notable changes in January 2008 edition of L&D Volume 2

Stream Protection – 1105.2 Bankfull culvert design method “Water quantity”/”Stream Protection”

Notable changes in January 2008 edition of L&D Volume 2

Notice of Intent (NOI) – 1112 Projects with estimated contractor and

Project Earth Disturbed Area (EDA) less than one acre do not require an NOI or post-construction BMP

Updated Figure 1112-1 (NOI Calculator)

Notable changes in January 2008 edition of L&D Volume 2

Notice of Intent (NOI) – 1112 cont. Example #1: Bridge replacement

project with 0.5 acres of Project EDA and an estimated 0.2 acres of Contractor EDA

Add SS832 and Item 832 Erosion Control (each) to plans

SWPPP quantity is not needed NOI is not needed

Notable changes in January 2008 edition of L&D Volume 2

Notice of Intent (NOI) – 1112 cont. Example #2: Bridge replacement project with 0.7

acres of Project EDA and an estimated 0.25 acres of Contractor EDA

Add SS832 and Item 832 Erosion Control (each) to plans

Based on site conditions, work type, etc., determine level of confidence with Contractor EDA estimate

If the Contractor EDA could reasonably exceed the estimate and result in the total EDA being greater than 1 acre

Provide a Project Site Plan, Item 832 SWPPP (Lump Sum), Item 832 Erosion Control (Each), and file the NOI

Notable changes in January 2008 edition of L&D Volume 2

Notice of Intent (NOI) – 1112 cont. Example #2 Variation: Bridge replacement project

with 0.7 acres of Project EDA and an estimated 0.25 acres of Contractor EDA

It is determined that 0.25 is a reasonable estimate for Contractor EDA

However, the Contractor uses more area and the resulting EDA is greater than one acre.

What happens now? SS 832 is being updated. The update will

require the Contractor to file the NOI and obtain the Permit, if he cannot constrain his operations to what is shown on the title sheet.

Notable changes in January 2008 edition of L&D Volume 2

Notice of Intent (NOI) – 1112 cont. Routine Maintenance Activity list

provided Multiple part and non-contiguous

projects Non-contiguous projects separated by at

least ¼ mile can be considered separate Non-contiguous multiple part projects can

be considered with respect to each part

Notable changes in January 2008 edition of L&D Volume 2

Notice of Intent (NOI) – 1112 cont. Watershed Specific Permits

Big Darby Creek and Olentangy River Additional requirements

Groundwater Riparian Setback Temporary Sediment Basin Locations

Coordinate with Central Office Production

Notable changes in January 2008 edition of L&D Volume 2

Post-Construction BMP – 1115 Post-construction BMP requirements

apply to ODOT and LPA projects Redevelopment vs. New Development

Area within existing ODOT right-of-way is considered impervious for BMP calculations

Notable changes in January 2008 edition of L&D Volume 2

Post-Construction BMP – 1115 cont. Options for locating BMP based on

treating 100% water quality for 20% of the Project EDA (redevelopment)

Water quantity treatment not required when less than 1 acre of new impervious area created

Notable changes in January 2008 edition of L&D Volume 2

BMP Selection and Submittals – 1116 Submittals to Central Office Production

Conceptual layout Plan sheets with BMP located Calculations/documentation

No treatment for areas with sheet flow off roadway and outside ODOT right-of-way

Notable changes in January 2008 edition of L&D Volume 2

BMP Toolbox – 1117 Exfiltration Trench

Updated Figure 1117-1 Manufactured Systems

Not suitable for large trunk sewers Depth limitations due to maintenance Permit Reviews – Watch for use of

manufactured systems on ODOT maintained roadways. Verify maintenance accessibility.

Notable changes in January 2008 edition of L&D Volume 2

BMP Toolbox – 1117 cont. Vegetated Biofilter

No conveyance ditch No energy protection area Bottom width determination (ignore

rounding) Use the entire contributing drainage area

(No incremental treatment) Maximum ditch bottom width of 10 feet

Updated Anti-Seep collar design requirements

Local-let and ODOT-let LPA Projects

ODOT-let LPA projects ODOT files the NOI

ODOT should ensure post-construction BMP provided meeting Ohio EPA expectations

LPA should be made aware of BMP requirements and maintenance responsibilities

Local-let and ODOT-let LPA Projects

Local-let LPA projects Local agency files the NOI

The LPA is responsible for providing post-construction BMP that meet Ohio EPA expectations (may use L&D Volume 2 or other EPA approved guidance)

ODOT’s global settlement negotiations do not apply to local-let LPA projects that cannot meet BMP requirements

The LPA must coordinate with Ohio EPA when deficiencies are identified

Local-let and ODOT-let LPA Projects

BMP Project Scenarios Document This document should no longer be

used as a guideline Post-construction BMP apply to the

entire project with the exception of privately owned property (non-municipal)

BMP Design Approach

Using Redevelopment/Treatment Percent reduction New Construction Projects

Calculate treatment percent (T%) Minimum T% is 20%

Redevelopment Projects 20%

BMP Design Approach

BMP Design Options Redevelopment projects

Provide 100% treatment for an area equal to 20% of the Project EDA

Provide 20% treatment for the entire project.

New construction projects Provide 100% treatment for an area equal

to T% of Project EDA Provide T% treatment for the entire

project.

BMP Design Approach

Vegetated Biofilters The entire project does not require

wider ditches Water quality credit earned for

drainage area within ODOT right-of-way Once area credit equals or exceeds the

20% or T% requirement, no further treatment is needed

Vegetated Biofilter Example (Redevelopment)

BMP Design Approach

Exfiltration Trenches (ExT)

Option #1 – Use 20% or T% of the required ExT length for the entire project

Requires all inlets, catch basins, etc. to provide an exfiltration trench or other BMP treatment

BMP Design Approach

Exfiltration Trenches (ExT) cont.

Option #2 – Use 100% of the calculated ExT length based on Section 1117.1 and provide treatment for ODOT R/W area that equals or exceeds 20% or T% of the Project EDA.

Allows the locations of BMP to be chosen when there are restrictions preventing BMPs at all inlets.

Exfiltration Trench Example (Redevelopment)

BMP Design Approach

Manufactured Systems

Option #1 – Calculate Water Quality Flow (WQf) and multiply the WQf by 20% or T%.

Entire contributing drainage area to the point in the storm sewer shall be used

Treat the entire project - Any project areas not tributary to this manufactured system must be drained to a BMP that will provide 20% or T% treatment

BMP Design Approach

Manufactured Systems

Option #2 – Calculate Water Quality Flow (WQf)

Entire contributing drainage area to the point in the storm sewer shall be used

Treat drainage area with a minimum area equal to 20% or T%, with no reduction in the calculated WQf.

Water quality credit only applies to area within ODOT R/W, but BMP must be sized for entire contributing drainage area

Manufactured Systems

BMP Submittals

Section 1116.2

Consideration of post-construction BMPs needs to happen early in the design process to allow for utilities and right-of-way issues to be addressed.

Early coordination with Ohio EPA will prevent fines, additional consultant costs, change orders and possible delays during construction.

BMP Submittals

Major Projects

Conceptual layout with Step 6 (AFA) – Required review and comment through C.O. Production

BMP Design with Step 8 (Stage 1) – Required review and comment through C.O. Production

BMP Submittals

Minor Projects

Conceptual layout with Step 3 (PE) – Optional review and comment through C.O. Production

BMP Design with Step 4 (Stage 1) – Required review and comment through C.O. Production

BMP Submittals

Contents of submittals at Stage 1 Estimated Project EDA Pre and Post Runoff Coefficient Pre and Post Impervious Area BMPs selected Calculations for BMPs Plan sheets showing location of BMPs Explanation for areas that were not

treated

BMP Submittals

Project Site Plan – Stage 3

Post-construction BMPs should be addressed on the Project Site Plan

Graphics Tables Cross-references to specific sheets or

details Narrative, if needed

BMP Submittals

Projects that are not fully compliant

C.O. Production will discuss with the District and Consultant.

If necessary, a meeting with Ohio EPA will be held to determine whether additional mitigation is required.

Issues during Construction

What happens when Ohio EPA issues a Notice of Violation (NOV) that cites a post-construction deficiency? District should determine if post-construction

BMPs were incorporated into the plans If post-construction BMPs are shown in the

plans, District shall obtain the calculations District shall determine whether the BMPs

shown in the plans were designed according to the Jan. 2008 L&D Manual Vol. 2

If deemed compliant, forward calculations to Ohio EPA

If deemed non-compliant, forward to C.O. Production for coordination with Ohio EPA

Post-Construction BMP Training

Training for Post-Construction BMPs Districts

Need to take the lead in communicating changes with BMPs for plans actively in design

Districts should coordinate with Central Office for assistance on unique situations

Consultants Submittals, reviews, and experience should

identify any potential training needs Future training may be needed, but minimum

benefit now

Coming soon….

Renewal of Construction General Permit Draft version available for public

comment Anticipated that the Permit will be

effective in April 2008 Minor changes to post-construction

Draft Permit allows mitigation off-site (must be negotiated with Ohio EPA)

Covered by January 2008 L&D Vol. 2 updates

Coming soon….

SS832 revision Addressing changes to Construction

General Permit and January 2008 L&D Volume 2

Anticipated update in first half of 2008

Coming soon….

L&D Volume 3 Update Addressing changes to January 2008

L&D Volume 2 Anticipated update in first half of 2008

Coming soon….

Olentangy Watershed Permit Final version yet to be completed by

Ohio EPA Anticipated that the Permit will be

effective later in 2008 Riparian Setback modifications Temporary Sediment basins Coordinate through Central Office

Production

Summary

Follow Implementation Plan for all projects

Provide BMPs for Local-let and ODOT-let LPA Projects

Revisions allow flexibility in locating Vegetated Biofilters, ExTs, etc.

Summary

No NOI or post-construction BMP for projects with less than one acre of total EDA

BMP Submittals to Central Office Production are required

Notice of Violation letters require prompt response

January 28, 2008 BMP Meeting

Any Questions or Comments?

Questions/Suggestions regarding Post-Construction BMPs Mike Wawszkiewicz

ODOT C.O. [email protected]