creating your pennsylvania ms4 chesapeake bay pollution reduction...
TRANSCRIPT
Creating Your Pennsylvania MS4 Chesapeake Bay
Pollution Reduction Plans
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Visit: www.chesapeakestormwater.net
Chesapeake Bay Stormwater Training Partnership
Next Up in our 2015 Webcast Series
http://chesapeakestormwater.net/events/categories/webcasts/2015-webcast-series/
June 4 Where Are the Urban Nutrients Coming From?
June 18 Tidal Shoreline Management: Processes & Techniques
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Poll Question #1
How many people are watching with you today?
• Just me
• 2-5 people
• 6-10 people
• > 10 people
Poll Question #2
In what sector do you work?
• Landscape contractor
• Engineering Consultant/Contractor
• Local Government
• State Government
• Non-profit
• Other
Poll Question #3
Did you, or anyone in the group with you, attend the MS4 workshops hosted by DEP this past winter?
• Yes
• No
• I don’t know
Speaker Info
Cecilia Lane
Chesapeake Stormwater
Network
Stormwater Coordinator
Joseph Battiata, P.E.
Center for Watershed
Protection
Sr. Water Resources
Engineer
Today’s Agenda
• Overview and Background
• Four Steps of a Chesapeake Bay Pollution Reduction Plan
• Stormwater BMP and Urban Retrofit Strategies
Overview & Background
Overview & Background
Regulated municipalities that have jurisdiction (own or operate) a stormwater or drainage system (among other possible public infrastructure) and are within an ‘urbanized area’ as defined by the U.S. Census
Overview & Background
Develop, implement, and enforce a Stormwater Management Program to reduce the discharge of pollutants to the MEP to meet water quality standards
Overview & Background
Six Minimum Control Measures:
1. Public Education and Outreach
2. Public Participation and Involvement
3. Illicit Discharge Detection and Elimination
4. Construction Site Runoff Control
5. Post-Construction Stormwater Management and
6. Pollution Prevention and Good Housekeeping for Municipal Operations and Maintenance
Overview & Background
If discharging to any portion of a waterbody with an approved TMDL; or
discharging to any tributaries that drain to the Chesapeake Bay:
You must develop and submit to DEP for approval, and ensure implementation of an MS4 TMDL Plan (Section A).
In the Chesapeake Bay watershed – referred to as a Chesapeake Bay Pollutant Reduction Plan (Section B)
TMDL/Chesapeake Bay Pollutant Reduction Plan Form
Attachment A Instructions
PA DEP Document: 3800-FM-BPNPSM0493 8/20/13
Section A: TMDL Plan/Design Details1. Summary of TMDL Strategy
2. Name of surface waters to which the UA discharges
3. Total number of discharge points (with a map)
4. Name of the TMDL
5. Watershed 8-digit HUC
6. Name of all the municipalities subject to the TMDL in the same HUC
7. Pollutants and WLA(s)
8. Estimated current load(s) and the % reduction required to meet the WLA
9. Explanation of how loads were calculated
10. List of all the BMPs: . . . .
Section A: TMDL Plan/Design Details
10. List of all the BMPs:
i. location,
ii. timeline/milestones,
iii. performance credit;
iv. calculated load entering, and
v. anticipated load reduction,
vi. BMP selection rational or decision matrix,
vii. description of long term O&M Plan
Section B: Chesapeake Bay Pollutant Reduction Plan
2. Incorporate GI/LID/ESD into municipal infrastructure upgrades;
3. Estimate current pollutant loads (optional);
4. Identify TMDL control measures.
• In 4 easy steps:
1. Narrative description of drainage area of the MS4 within the UA;
412-442-4000
814-332-6984 570-826-2511570-327-3636
484-250-5970717-705-4700
Overview & Background
• Sample CBPRP formatted to address requirements of the 2013 PA MS4 Permit (PAG-13)
• Needs to be adapted to reflect varying local conditions and compliance goals
• Accepting comments (by July 1, 2015)
Chesapeake Bay Pollutant Reduction Plan
2. Incorporate GI/LID/ESD into municipal infrastructure upgrades;
3. Estimate current pollutant loads (optional);
4. Identify TMDL control measures.
• In 4 easy steps:
1. Narrative description of drainage area of the MS4 within the UA;
Chesapeake Bay Pollutant Reduction Plan
1. Narrative description of the drainage area of the MS4 within the UA (that discharges to the tributaries of the Chesapeake Bay)
Understand your MS4
Understand the MS4
MCM #3: Illicit Discharge, Detection and Elimination (IDDE)
• BMP #2 & BMP #3: Develop and maintain a map of your regulated small MS4.
Minimum Control Measure #3
BMP #2 and #3
• Roads• Basins• Inlets• Piping• Swales• Catch Basins
• Channels• Outfalls• Watershed Boundaries• Municipal Boundaries• Any other features of the
storm sewer system
Map of Regulated MS4:
Understand the MS4
MS4 draining to pipe into basin
MS4 discharge from pipe(s) into grass swale
Drainage Area to the MS4
PADEP Draft Guidance December, 2014
Understand the MS4:
• Urbanized Area
• Land Cover:
– Regulated Pervious (%)
– Regulated Impervious (%)
• Streams
• Protected Lands
Understand the MS4:
• Areas to be excluded
– Direct Discharge to streams
– Other permitted entities (?)
• Colleges & Universities
• Federal facilities
• PennDOT
Understand the MS4: GIS Data
Data Source
Impervious Cover Chesapeake Bay Program
Land Use USGS National Land Cover Database
Streams PASDA
Boundary layers (municipal, county boundary, etc.)
PASDA, CBP
Urbanized Area U.S. Census Bureau
Step 1: Narrative description of the drainage area of the MS4 within the UA
Stormyville Township
• Muddy River Watershed
• Tributary to the Chesapeake Bay
• Total acres, Pervious % & Impervious %
• Characterization of soils by HSG
• Delineation of known areas of karst geology
• 10.2 miles of stream
Chesapeake Bay Pollutant Reduction Plan
• In 4 easy steps:
1. Narrative description of drainage area of the MS4 within the UA;
2. Incorporate GI/LID/ESD into municipal infrastructure upgrades;
3. Estimate current pollutant loads (optional);
4. Identify TMDL control measures.
Chesapeake Bay Pollutant Reduction Plan
2. Infrastructure Upgrades: CIP
• GI= Green Infrastructure
• LID = Low, Lower, Lowest Impact Development
• ESD = Environmental Site Design
Taking Advantage of Leveraged Capital
Streetscape and Sustainable Design Program, City of Chicago
Streetscape and Sustainable Design Program, City of Chicago
Pavement Rehabilitation at ‘Historic’ Town Hall
37
Re-Development & Revitalization
38
2. Infrastructure Upgrade Assessment
Chesapeake Bay Pollutant Reduction Plan
• In 4 easy steps:
1. Narrative description of drainage area of the MS4 within the UA;
2. Incorporate GI/LID/ESD into municipal infrastructure upgrades;
3. Estimate current pollutant loads (optional);
4. Identify TMDL control measures.
Chesapeake Bay Pollutant Reduction Plan
3. Estimating current pollutant loads will establish the baseline of the decision making matrix for selecting load reduction strategies.
Benefits (sales pitch):
• Account for what has been done (2006 to 2014);
• ‘Paint the target’ to support Step 4: optimization of reduction goals, strategies, and implementation
• Measureable progress towards compliance
Did you say ‘Compliance’?
TMDL vs CBPRP
MS4 Permits require (local) TMDL & CBPRP Plans:
• Compliance Goal (% reduction) of local TMDL is based on the specific language of the TMDL;
• Compliance Goal of the Chesapeake Bay TMDL is not (was not) as easily tabulated;
Therefore, calculating the existing load, and calculating a specific load (%) reduction is not mandatory for compliance with PAG-13.
3. Estimating Pollutant Loads
MapSheds (GWLF)- PSU
www.mapshed.psu.edu/
Chesapeake Assessment and Scenario Tool (CAST-CBP
www.casttool.org
Others
Watershed Treatment Model
http://www.cwp.org/online-watershed-library/
Clean Water Optimization Tool
http://www.cwp.org/2015-03-19-18-18-00/clean-water-optimization-tool
Estimating Pollutant Loads CAST:• Provides a ‘big picture’ perspective;
• Operates at a county scale;
• Utilizes Bay Model pollutant loading rates;
• Pervious & Impervious land cover (only);
• Aggregates total acreage to like BMPs;
• Bay Program BMP efficiencies are ‘hard wired’ into the tool;
• Does not include a ‘land use’ for streams; the load from stream bank erosion is reflected in the individual land use loading rates.
Estimating Pollutant Loads MapShed:• Also provides a ‘big picture’ perspective;
• Operates at a smaller scale: Borough or Township;
• Pre-populated pollutant loading rates based on GIS layers (built into the model), or User-entered;*
• More detailed land cover categories: crop land, pasture, lo-med- and high-density residential, mixed use, commercial, etc.;
• User entered BMP efficiencies (CBP, CBP USWG, PA BMP Manual);
• Utilizes a separate module to simulates the load from stream erosion sediment loads separate from land use;
• Instructional videos: http://www.mapshed.psu.edu/download.htm
MapShed Nutrient Load Editor
Estimating Pollutant Loads
• Goal of current Permit: develop a strategy;
• Utilize CAST or MapShed to understand loads and land uses;
• Utilize an alternate (parallel) calculation tool for developing & optimizing a CBPRP Strategy
Chesapeake Bay Pollutant Reduction Plan
• In 4 easy steps:
1. Narrative description of drainage area of the MS4 within the UA;
2. Incorporate GI/LID/ESD into municipal infrastructure upgrades;
3. Estimate current pollutant loads (optional);
4. Identify TMDL control measures.
Chesapeake Bay Pollutant Reduction Plan
4. Identify TMDL control measures– Location of BMPs (latitude/longitude, street
name, other)
– Implementation schedule
– BMP pollutant reduction credit for N, P and TS
– Rationale for selecting the BMP
– BMP O&M Plan
Chesapeake Bay Pollutant Reduction Plan
4. Identify TMDL control measures from Section II F of the NOI Instructions (3800-PM-BPNPSM0100c) or other BMPs, that will be implemented to reduce pollutant loads to the Chesapeake Bay Watershed from the MS4.
TMDL Control Measures 1. Establish, Restore and Protect Riparian Forest Buffers
2. Impervious Disconnection Program from the regulated MS4
3. Tree Planting
4. Construct Recharge / Infiltration Facilities
5. Stormwater Basin Retrofits
6. Restore Stream banks
7. Establish Green Infrastructure at Municipal Facilities
8. Develop and implement additional provisions to address TMDLs or a separate MS4 TMDL Stormwater Management Ordinance
9. Participate in an approved Trading and Offset Program
Top 10 Cost Effective Strategies:
1. Partnering with your neighbors
Cost Effective Strategies
54
Stream restoration: $200/lf
6 PA projects; avg length of restoration = 1,500 l.f.
Economy of Scale• Large Scale
– Basin & Storage Retrofits treat relatively large drainage areas;
– Generally categorized as Stormwater Treatment practices (treatment vs volume reduction);
– Compliments stream channel restoration/stabilization efforts;
• Small Scale– On-site Retrofits
– Raingardens
55
Urban Reforestation
56
Temple-Villanova Urban Reforestation Program
Impervious Cover Reduction
57
TMDL Control Measures: Stormwater RetrofitsNew Impervious Cover Retrofits 1. Near Existing Stormwater Outfalls
2. Within the Conveyance System
3. Adjacent to Large Parking Lots
4. Green street retrofits
5. On-site LID retrofits
Existing BMP Retrofits1. BMP Conversions
2. BMP Enhancements
3. BMP Restoration
New RetrofitsNear Existing Stormwater Outfalls
New RetrofitsWithin Existing Conveyance System
New RetrofitsAdjacent to Large Parking Lots
New RetrofitsGreen Infrastructure
New RetrofitsOn-Site LID
Stream Restoration & Stabilization
64
TMDL Control Measures: Stormwater Retrofits
Existing BMP Retrofits
1. BMP Conversions
2. BMP Enhancements
3. BMP Restoration
EXISTING RETROFITS
BMP CONVERSION
DRY POND CONSTRUCTEDWETLAND
EXISTING RETROFITS
BMP ENHANCEMENT
INCREASE IN HYDRAULIC RETENTION TIME
BMP RetrofitsBMP Restoration
Where Are Load Reductions in the Developed Landscape?
1. Retrofit Scoping• Define retrofit objectives
– Pollutants of concern (POC)
– In-stream sediment load
– Runoff volume
• Screen for retrofit potential– Impervious cover
– Existing SW basins
– Existing headwater culverts
– MS4 outfalls
– Publicly owned land
– Stream corridors
– Development/Redevelopment potential
2. Desktop Analysis
• GIS layers
• MS4 Mapping
3. Retrofit Reconnaissance Investigation (RRI)
• Advance preparation
• Evaluation criteria (RRI Form)
• Final summary
4. Compile Inventory
• Concept designs
• Storage volume estimates
• Pollutant removal/Volume reduction
• Initial cost estimates
• Master Retrofit Map
4. Compile Inventory
5 & 6. Evaluation & Ranking
• Establish Screening/Scoring criteria
• Develop Ranking
– Citizen Concerns:
Loss of trees
Safety;
Aesthetics;
Maintenance
Construction
75
5 & 6. Evaluation & Ranking (continued)
– Retrofit Benefits (Treatment Analysis)Feasibility (available head, access, land
ownership)*AccessCost/AcreCost/lb removedCost/ft3 of runoff removedStream Channel ProtectionMaintenanceVisibilityHabitatAncillary community benefits
*determined during RRI 76
Load Reduction & Costs
Estimating Pollutant Loads & Optimizing the Reduction Strategy
Data requirements
• Area of MS4; or other designation
• Percent impervious, pervious
• Land use type; and
• Design treatment volume, e.g.: 1”, 2.5”, etc.)
Tool Requirements
• WTM or CWOT
77
Tracking BMPs: Shovel Ready
7. Design & Construction
8. BMP Operation & Maintenance Plan
Example Pollutant Load Reduction Spreadsheet
81
Proj ID Name Location Proj Type Amount Unit TN RedLbs/yr
TP RedLbs/yr
TSS RedLbs/yr
$/est.(optional)
1 Little Big Run Lat/Long Stream Restoration
1200 Feet 359 122 970000 $250,000
2 Smart Kids Elementary School
Street Address
Bioretention 1.5 Acres Treated
175 95 130000 $34,000
3 MunicipalBuilding
StreetAddress
Pond Retrofit 7.5 Acres Treated
292 175 9000 $50,000
4 TownshipPark
Lat/Long Forest Buffer 4 acres 94 27 1200 $4,500
Pollutant Load Reduction Summary
Compare current loads (step 3) to projected load reduction from planned BMPs (step 4) to show progress (% reduction)
TN TP TSS
Current Load (includes voluntary and redevelopment projects)
A lbs/yr
Future planned projects B
Percent Reduction B x100A
Matching Load Reductions with WIP II Goals
• WIP II goals
– Developed using Chesapeake Bay Model/CAST tool
– MapShed may have been used to develop local TMDL
Questions?
Webcast Resources
• Model Chesapeake Bay Pollutant Reduction Plan –
draft version March 2, 2015
• See additional resource document
www.chesapeakestormwater.net
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