VDOT’S STORMWATER MANAGEMENT PROGRAM

ASCE PRESENTATION

February 20, 2014

PRESENTATION OUTLINE

VDOT SWM Program Overview/Challenges Roy Mills – L&D Division

Stormwater Management Regulations in Virginia

and VSMP Part IIB Technical Criteria Ginny Snead, P.E. – Maintenance Division (Louis

Berger contract employee)

TMDL (Total Maximum Daily Load) Program Tracey Harmon – Environmental Division

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VDOT’S STORMWATER MANAGEMENT PROGRAM AREAS

Erosion and Sediment Control o Construction site controls

Post Construction Stormwater Managemento Water quality/quantity BMPs

VSMP Construction Permito Coverage for regulated land disturbing activities

MS4 Permito Covers VDOT operations in the 15 Census Urban Areas

of the State

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PROGRAM ADMINISTRATIONVDOT CENTRAL OFFICE

Manages statewide programDevelops policies and guidance

VDOT DISTRICT/RESIDENCY OFFICES Implements policies and procedures

OFFICE OF THE STATE SWM PROGRAM

ADMINISTRATOR (CO L&D)Develops policies/guidanceProvides/coordinates trainingManages budget & consultant contractSubmits to DEQ for VSMP Construction Permit coverage for land

disturbing activitiesDevelops MS4 Implementation Plan

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PROGRAM ADMINISTRATION (Cont.)

2 Staff EngineersMS4 Steering Committee

L&D DivisionEnvironmental DivisionMaintenance DivisionTraffic Engineering DivisionTransportation Planning DivisionLearning CenterConstruction DivisionCommunications OfficeDistrict Construction RepresentativeDistrict Maintenance RepresentativeVCTIR RepresentativeMS4 Consultant

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PROGRAM ADMINISTRATION (Cont.)

SWM Program Policy Committee Deputy Chief Engineer Construction Division Administrator Maintenance Division Administrator Environmental Division Administrator Learning Center Administrator District Administrator Representative

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ADDITIONAL PROGRAM DETAILS

BUDGET $3.5 Million Annually

Does not include: • Project related cost• Cost covered by normal operationally expenses• Cost for any retrofit BMPs

MS4 CONSULTANT CONTRACT 3 Term Contract (Began April 2014) $3 Million maximum per term EEE Consulting (Prime)

Stantec (formerly WEG) and JMT (Subs)

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CHALLENGESor

OPPORTUNITIES THAT ARE CLEVERLY

DISGUISED

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VSMP CONSTRUCTION PERMIT Existing permit expires 6/30/14 New Permit begins 7/1/14 New permit approved by SWCB 12/13 New permit includes new/revised requirements for:

Construction inspection frequency SWPPP/SWM inspections P2 Plans (Pollution Prevention) P2 training for contractor personnel Requirements to meet EPA’s Effluent Limitation Guidelines (ELGs) Projects with coverage under current permit must reapply for coverage

under new permit by June 1 and SWPPPs must be updated within 60 days of new permit coverage to incorporate any new or revised requirements (includes projects under construction)

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MS4 PERMIT New Phase II General Permit effective 7/1/13 VDOT received coverage under the new permit on

11/1/13 Permit contains new requirements for the six

Minimum Control Measures (MCMs):o Public Education and Outreach

Identify 3 high priority water quality issues, develop an appropriate message and delivery to a target audience

o Public Involvement/ParticipationParticipate in 4 local SWM activities annually

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MS4 PERMIT (Cont.)

o Illicit Discharge Detection and Elimination (IDDE)Complete the storm sewer system outfall map and

information tables and make info available upon request

Complete and implement IDDE proceduresProvide for public reporting of potential illicit

discharge

o Construction Site Stormwater Runoff ControlNew inspection requirements P2 Plans and contractor training

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MS4 PERMIT (Cont.)

o Post Construction Stormwater ManagementNew water quality and quantity requirements and

compliance methods (Runoff Reduction and Energy Balance Equation)

New BMP selection list (BMP Clearing House Website)

o Pollution Prevention/Good Housekeeping for Municipal OperationsSWPPPs for high priority facilitiesP2 Plans for onsite operationsBiennial training for employees

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MS4 Permit (Cont.) Contains Special Conditions for addressing :

o Chesapeake Bay TMDLRequires determination of pollutant loads and required

reductions on developed lands prior to 2009Requires achieving 5% of total load reductions prior to

end of current permit cycle (6/30/18)

o Other TMDLs (Local)8 from previous permit – Continue implementation of

Action Plans14+/- new ones – Develop Action Plans

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OTHER ITEMS OF INTEREST

DEQ’S SWM CERTIFICATION PROGRAM Similar to ESC Certification Program except no exemption

for a professional license (P.E./L.A./L.S.) for initial Plan Reviewer certification

SWM Inspector & Plan Reviewer Certifications required by 7/1/14 for appropriate personnel

DEQ currently conducting 2 day Basic and 1 day Inspector classes

2 day Plan Reviewer Classes due in early Spring 2014 VDOT has received approval to conduct the training

classes for its internal employees and consultant contract personnel (training is currently underway for 600+ people)

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OTHER ITEMS OF INTEREST(Cont.)

SUPPORT FACILITIES – VSMP CONSTRUCTION

PERMIT COVERAGE Supplemental Specification (SS) finalized and was available

for inclusion in construction contracts beginning 9/13 Contractor develops plans & VDOT obtains permit

coverage for all facilities located within VDOT right of way or easement.

Contractor develops plans and obtains permit coverage for all facilities located outside VDOT right of way or easement

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OTHER ITEMS OF INTEREST(Cont.)

CURRENT RESEARCH ACTIVITIES (VCTIR) Lorton Road Project LID BMP Evaluations Maintenance Requirements for Permeable Asphalt

Pavement – Route 66/234 Park and Ride Lot Use of Nutrient Credit Banks to satisfy water quality

requirements for VDOT projects BMP Design Manual of Practice – Phase II

STANDARDS and SPECIFICATIONS Revised EC-5 Silt Fence Standards New Standard Sheets for Clearing House BMPs –

Construction Details, Specifications and Inspection Protocols (for construction and post construction)

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FIRST INTERMISSION

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STORMWATER REGULATIONS

IN VIRGINIA

AND

NEW VSMP TECHNICAL CRITERIA

(PART IIB)

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STORMWATER REGS IN VA

Clean Water Act/NPDES Industrial SW GP Construction SW GP MS4: Phase I Ind., Phase II GP

State Regulatory Programs Va SW Management Permit

Statewide

Erosion and Sediment ControlStatewide

Chesapeake Bay PreservationTidewater

2014 VSMP Regulation Changes

New Construction GP

Water Quality Criteria

Water Quantity Criteria

Local Programs

Stormwater Criteria Address Land Use Changes as a Result of Development

Land Disturbance Activity regulated

under federal regulation

Pre-development – non-regulated land

use

Post-development – non-regulated

land use

The water quality and quantity design criteria are implemented in conjunction with the VSMP General Permit for Stormwater Discharges from Construction Activities. These criteria are based on a State regulation separate from federal requirements.

Water Quality: Key Differences

Existing Rules

Impervious Surface (IC) only

0.5 inches of Runoff from the IC only

Average land condition/

technology based

10% reduction TP

Simple Method

Modified Rules

IC + Forest/Open Space + Managed Turf

1.0 inches of Rainfall from the whole site

0.41 lbs./ac/yr TP

<1 acre = 10% red. TP,>1 acre = 20% red. TP

Runoff Reduction Method (RRM)

Land Use(s)

Event

New Design Criteria

Redevelopment Criteria

Compliance Methodology

“Traditional” BMP pollutant removal efficiencies do not take into account the removal that occurs when the runoff volume is reduced.Many BMPs do not reduce runoff volume at all.

Current Methodology

Using BMPs that also provide volume reduction provides greater overall pollutant (mass load) removalThis reflects a “Mass Balance” Approach

Runoff Reduction Method

New Design CriteriaEnvironmental Site Design

There is no longer a specified “Average land cover condition” (% Imp. Cover or Poll. Load) below which you are not required to meet any water quality requirements

“Site” is redefinedImagine the site as an area that you can put construction fencing around ,but including undisturbed areas that are going to be protected as part of the plan.

Stormwater Offsets Program

Current Program to Offset Phosphorus Design Requirement Offsite

Flexibility for Developers DEQ Approved Perpetual Credits

James, York, Rappahannock, Potomac

Local Water Quality Limitations Same or Adjacent 8 Digit HUC Same Basin In Bay Watershed Only New Regulations Pending

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Water Quantity Criteria

Past approaches in urban stormwater hydrology focused on

Peak Flow

Flooding

Velocity

The new paradigm is

Volume-Based Hydrology (VBH)

The Energy Balance Method

The longer and stronger the force acts, the more sediment is moved.

The ENERGY ENERGY BALANCE METHODBALANCE METHOD is based on the interaction of both flow volume and peak discharge, which determine the stream channel configuration

Revised Stormwater Management Handbook

The draft Revised Stormwater Management Handbook can be found at DEQ’s web-site.

Developed to provide additional guidance to accompany the regulations.

Contains chapters with example problems

SECOND INTERMISSION

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VDOT’s MS4 TMDL Program

Tracey Harmon

Water Quality Permits Manager, Environmental Division

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TMDLs with VDOT WLA

2008 PH. II Permit• 8 TMDLs in MS4 areas with WLA assigned to VDOT

Stroubles Creek - sediment

Crab Creek – sediment & bacteria

Opequon Creek & Abrams Creek – sediment & bacteria

Bull Run − sediment

Popes Head Creek − sediment

Goose Creek − sediment

Roanoke River − sediment & bacteria

Potomac River − PCB

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Local TMDL Study Template

Justification Memo

Outfall Recon

Facility Evaluation

Calculate Contributing Acreage

Develop Annual Characterization• Estimate Stormwater Volume• Estimate Pollutant of Concern (POC)

BMP Selection Process

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Popes Head

Creek

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Popes Head

Creek

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Popes Head

Creek

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Popes Head

Creek

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Popes Head

Creek

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Transportation Approach

Impervious Estimates

“Roadway” LU type = 100% impervious• vs. TMDL’s NLCD data (eg. LDR = 35%)

ROW Estimates

Based on GIS & aerial photo• vs. TMDL Contributing Acreage

Watershed Treatment Model (WTM)

Non-structural & Structural BMPs• vs. TMDL Model (GWLF, HSPF)

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Transportation Approach

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Transportation Example

NLCD Example

BMP Selection Process

Based on % reduction from TMDL• MS4 Core Program Credit

40% reduction sediment• Additional Reductions Needed

Evaluate Applicable BMPs for POC• Determine Efficiency Ranking• Determine Cost Ranking

Select BMPs based on Cost-Effectiveness

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BMP Selection Example

WLA % reduction for POC = 72%

Apply Core BMP Credit

32% Additional Reductions Needed

Structural & Non-Structural BMPs

Highest Efficiencies

Lowest Costs

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Non-Structural BMPs

Riparian forest buffer

Catch basin clean out

Street Sweeping

Tree Planting (open space to forest)

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Structural BMPs

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BMP Rankings

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BMP Cost Score Removal Score Final Score

Street Sweeping 91 3.5 313.8

Grassed Filter Strips 91 0.7 63.1

Dry Swale (bio, WQ ) 88 0.6 50.9

Catch basin clean out 91 0.4 40.4

Wetland 90 0.4 39.3

Grass (open) Channel 88 0.4 32.1

Wet Swale 88 0.4 32.1

Retention (wet) Pond 90 0.2 13.9

Dry Extended Detention Pond 84 0.2 12.9

Bioretention 80 0.1 11.2

Example

Selected BMP Options

Vacuum-Assisted Street Sweeping

Street Sweeping plus Grassed Filter Strips

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Street-Sweeping BMP

2850 acres of roadway

Or equivalent street miles of ROW

Vacuum-assisted street sweeper

Map of Roads to Sweep

Documentation

Tipping Fee Receipts

Spreadsheet

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Street-Sweeping Tabulation Sheet

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TMDLs with VDOT WLA

2013 PH. II Permit• 23 TMDLs in MS4 areas with WLA assigned to

VDOT

Original 8 plus,

•Chickahominy R –Bacteria •Lower Accotink Creek – Bacteria

•James R (Richmond) – Bacteria •Neabsco Creek – Bacteria

•Difficult Run – Bacteria, Sediment •Occoquan R – Bacteria

•Hoffler Creek – Bacteria •Rivanna R - Bacteria, Sediment

•Hunting Cr, Cameron Run, Holmes Run – Bacteria

•Tidal Fresh Rappahannock R – Bacteria

•James R (Lynchburg) – Bacteria •Tidal Four Mile Run - Bacteria

•Chesapeake Bay – Sediment, N, P

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Next Steps

Continue/Update Existing Action Plans

Develop Action Plans

14 new local TMDLs

Chesapeake Bay TMDL

Identify Outfalls, BMPs, Facilities, ROW in 2010 Census Urban Area expansions

Share data and findings w/other MS4s

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