PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Chesapeake Bay Pollution Reduction Plan Instructor: June 10, 2014 Julie Schneider, Watershed Planner CWP Bryan Seipp, Watershed Manager, CWP Ruth Hocker, PA Senior Scientist CBF 1
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan To Adjust How the Slides Appear on Your Screen To make the slide area larger, go to Full Screen under the Meeting Tab. To Ask a Question The right corner of the screen contains a Q&A chat box. Type your question in the box and click on the send question icon to submit it. We will try to answer as many questions as possible during and after the webcast. 2
3 Chesapeake Bay Foundation Largest and oldest non-profit dedicated to restoring the Chesapeake Bay and its tributary rivers and streams Environmental education for adults and schoolchildren in PA, MD and VA Advocacy at the local, state and federal level, and help for communities Restoration program for filters: forested stream buffers, oysters, etc. www.cbf.org
4 Center for Watershed Protection Stormwater and watershed guidance documents National MS4 Expertise Hands-on technical assistance www.cwp.org
5 Presentation Overview Introduce the Chesapeake Bay Pollution Reduction Plan How to develop a Plan using PA DEP s 4 step process
6 Chesapeake Bay TMDL A pollution diet for a local waterbody. TMDL= Wasteload allocations (MS4 system, WWTP, industrial point sources) + Load allocations (septic, agriculture) + Margin of safety
7 PA DEP Requirements for Section B: Chesapeake Bay Pollution Reduction Plan Four Steps: 1. Narrative of MS4 2. Incorporate GI/LID/ESD into municipal infrastructure upgrades 3. Estimate current pollutant loads (optional) 4. Identify TMDL control measures PA DEP Document 3800-FM-BPNPSM0493 8/20/13
8 Step 1. Narrative of MS4 Drainage area of MS4 within the UA discharging to the Chesapeake Bay Watershed: 1. Pervious and impervious cover (%) 2. Land use (acres) 3. Stream miles (note impaired streams) (linear feet) *Sources of GIS data included on resource sheet
9 Step 1. Narrative of MS4
10 Step 1. Narrative of MS4 Data Impervious Cover Land Use Streams Boundary layers (municipal, county boundary, etc.) Urbanized Area Source Chesapeake Bay Program USGS National Land Cover Database PASDA PASDA, CBP U.S. Census Bureau *Use local data when available
11 Step 1. Narrative of MS4
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Step 1. Narrative of MS4 Other information to include: Areas not included Large federal facilities (not responsible for) Other permitted entities Watersheds and tributary streams in MS4 High quality areas Protected lands Population stats Other relevant information 12
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Army Depot in Fairview Township 13
14 Chesapeake Bay Pollution Prevention Plan (CBPRP) Four Steps: 1. Narrative of MS4 2. Incorporate GI/LID/ESD into municipal infrastructure upgrades 3. Estimate current pollutant loads (optional) 4. Identify TMDL control measures
15 Step 2. Incorporate GI/LID/ESD into Municipal Infrastructure Upgrades Green Infrastructure (GI) Low Impact Development (LID) Environmental Site Design (ESD)
16 Step 2. Incorporate GI/LID/ESD into Municipal Infrastructure Upgrades
17 Step 2. Incorporate GI/LID/ESD into Municipal Infrastructure Upgrades
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Example I Street Widening project on Main Street Options Considered Bioretention Porous Pavement Considerations On-street Parking Mature Trees Result Neither option is feasible here because most residences do not have driveways and loss of parking for street scape bioretention is not acceptable to community. Potential damage to large mature trees during construction and concerns of clogging due to leaf litter result in porous pavement being unacceptable. 18
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Example II New Township Park Options Considered Bioretention in parking lot Stream restoration with floodplain connection and forest buffer Considerations Costs Result Permits Construction timeline Bioretention will be implemented along the down slope perimeter of the parking lot as well as in the parking lot islands Stream restoration will occur in phases with phase 1 occurring at the time of park development and phases 2 and 3 occurring in subsequent years. 19
20 Chesapeake Bay Pollution Prevention Plan (CBPRP) Four Steps: 1. Narrative of MS4 2. Incorporate green infrastructure into municipal infrastructure upgrades 3. Estimate current pollutant loads (optional) 4. Identify TMDL control measures
21 Benefits: Step 3. (Optional) Estimate Current Pollutant Loads 1. Provide a baseline pollutant load for your municipality 2. Account for what you and your partners (watershed groups, schools, etc) have done 3. Have a better understanding of current rate of progress.
22 Step 3. (Optional) Estimate Current Pollutant Loads Modeling programs 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/ See CBF webcast on modeling
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Minimum Data requirements BMP type and acres treated (or area for land-use change BMPs) Better BMP type, acres treated and % impervious Best BMP type, acres treated, % impervious, land use type, and amount of runoff retention (i.e. 1, 2.5, etc.) 23
24 Step 3. (Optional) Estimate Current Pollutant Loads
25 Summary of Reported BMPs Installed from 2007-2014 BMP Type Impervious Drainage Area (Acres) Pervious Drainage Area (Acres) Acres Linear Feet Stream Restoration 0 0 0 5,000 Forest Buffer 0 0 5.00 Wet Pond/Wetland 40 50 0 0
26 Step 3. (Optional) Estimate Current Pollutant Loads
27 Chesapeake Bay Pollution Prevention Plan (CBPRP) Four Steps: 1. Narrative of MS4 2. Incorporate green infrastructure into municipal infrastructure upgrades 3. Estimate current pollutant loads (optional) 4. Identify TMDL control measures
28 Step 4. Identify TMDL Control Measures Identify TMDL control measures and include: 1. Location of BMPs (latitude/longitude, street name, other) 2. Implementation schedule including interim milestones 3. BMP pollutant reduction for N, P and/or Sediment 4. Rationale for selecting the BMP 5. BMP Inspection, operation and maintenance
29 Existing Resources: Watershed plans, stream assessments, etc. Conduct Field Assessments: opportunities at public lands, public sites needing upgrade Location of BMPs
30 TMDL Control Measures 1. Establish and Protect Riparian Forest Buffers restore vegetated buffer areas 2. Disconnection Program Disconnect impervious areas from your regulated small MS4 system 3. Tree Planting Plant trees within the area that drains to the regulated small MS4. 4. Construct Recharge / Infiltration Facilities 5. Stormwater Basin Retrofits Naturalize or modify for extended detention, and/or modify basins for increased infiltration 6. Restore Stream banks Restore and/or stabilize degraded and eroded stream banks 7. Establish Green Infrastructure at Facilities that are owned by the municipality and that drain to the regulated small MS4 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
31 Location of BMPs
32 Project ID Jurisdiction/ Party Project Name Project Type Latitude Longitude 1 City of Yellow Main Street Greenway Bioretention 39.966512-76.719948 2 East Township Baseball Fields Bioretention 40.013022-76.593407 3 Main Township Main Township Municipal Complex Bioretention 40.021230-76.752979 4 West Main Township Summer Park Bioretention 39.968734-76.801098 5 Hamish Township Broad Street Bioswale 40.029241-76.615090 Spring Valley 6 Township Michigan Ave Pond Retrofit 39.942421-76.727789
33 Project ID Jurisdiction/Party Project Name Project Type Represented As Type Latitude Longitude Location of BMPs 1City of York Broad Street Greenway Bioretention Bioretention 39.966512-76.719948 2Hellam Township Barshinger Fields Bioretention Bioretention 40.013022-76.593407 3Manchester Township Manchester Township Municipal Complex Bioretention Bioretention 40.021230-76.752979 4West Manchester Township Sunset Park Bioretention Bioretention 39.968734-76.801098 5Hellam Township Ore Bank & Spring Rd Bioswale Bioswale 40.029241-76.615090 6Spring Garden Township Virginia Ave Step Pool Conveyance Bioswale 39.942421-76.727789 7York Township MD & PA CG trail extension Bioswale Bioswale 8City of York Rail Trail (Market-Kings Mill) Porous Pavement Pervious Pavement 39.945070-76.742459 9Fairview Township Pinetown Road-Bike/Ped area Pervious Pavement Pervious Pavement 10York Township Mill Creek Preserve- Parking Lot Porous Pavement Pervious Pavement 39.945222-76.661865 11York Township York Township Park- Parking Lot/Trail porous Pavement Pervious Pavement 39.922073-76.679483 12City of York York City Industrial Park Pond Retrofit Pond Retrofit 39.983600-76.750500 13Dover Township Wyngate Basin Pond Retrofit Pond Retrofit 39.983333-76.839722 14Dover Township Dover Township Community CenterPond Retrofit Pond Retrofit 39.979444-76.837500 15Fairview Township Emily Lane Stormwater Pond Pond Retrofit Pond Retrofit 40.18-76.84 16Hellam Township 102 Chelsea Way Pond Retrofit Pond Retrofit 40.025035-76.626763 17Manchester Township I-83 Basin Pond Retrofit Pond Retrofit 40.040252-76.746611 18Shrewsbury Township Deer Creek Initiative- Grace Church Pond Retrofit #1 Pond Retrofit 39.766448-76.667039 19Shrewsbury Township Deer Creek Initiative- Grace Church Pond Retrofit #2 Pond Retrofit 39.770254-76.668628 20Shrewsbury Township Deer Creek Initiative- Giant Food Pond Retrofit #3 Pond Retrofit 39.772058-76.668946
34 Calculate Pollutant Load Reduction Determine Land Use Load rate from CAST or MapSheds Calculated using % pollutant load reduction % from CAST Model for N, P and TSS Stream restoration and street sweeping pollutant load reductions from Bay Program and expert panels PA BMP manual currently being updated Local data on stream restoration Optional- Calculated planning level cost data for each BMP (King and Hagan, 2011)
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Land-use Loading Rate 35
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Land-Use Loading for TN Lbs Nitrogen Lbs/ac TN Lbs Nitrogen Lbs/ac TN Landuse Acres Edge of Stream EOS Delivered DEL regulated impervious developed 26,092.10 814,582.10 31.22 572,854.00 21.96 regulated pervious developed 78,853.40 1,565,997.20 19.86 1,070,388.00 13.57 For spreadsheet use Edge of Stream 36
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Example for TN Bioretention (B soils w/ underdrain) at School Parking Lot Treats 1.2 acres (75% impervious) (0.75) * 1.2 ac = 0.9 acres impervious and 0.3 acres pervious 0.9 ac * 31.22 lbs/ac TN = 28.09 lbs/yr 0.3ac * 19.86 lbs/ac TN = 5.96 lbs/yr Total TN load to BMP = 34.05 lbs/yr BMP reduction efficiency for TN= 70% 34.05 lbs TN *0.70= 23.84 lbs/yr reduction in TN 37
PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Example Pollutant Load Reduction Spreadsheet Proj ID Name Location Proj Type Amount Unit TN Red Lbs/yr 1 Little Big Run Lat/Long Stream Restoration 2 Smart Kids Elementary School 3 Municipal Building 4 Township Park Street Address Street Address Lat/Long Bioretentio n Pond Retrofit Forest Buffer TP Red Lbs/yr TSS Red Lbs/yr $/est. (optional) 1200 Feet 359 122 970000 $250,000 1.5 Acres Treated 7.5 Acres Treated 175 95 130000 $34,000 292 175 9000 $50,000 4 acres 94 27 1200 $4,500 38
39 Pollutant Load Reduction Summary Compare current loads (step 3) to projected load reduction from planned BMPs (step 4) to show progress (% reduction) Current Load (includes voluntary and redevelopment projects) Future planned projects Percent Reduction TN TP TSS A lbs/yr B B x100 A
40 Matching Load Reductions with WIP II Goals Development of WIP II goals Developed using Chesapeake Bay Model/CAST tool One advantage to using CAST GWLF (MapSheds) may have been used to develop local TMDL Goals often reflect delivered loads CAST tool provides Edge of Stream and Delivered Loads To estimate Delivered loads in CAST Aggregate each practice type Enter data Run Model
41 BMP Type Impervious Drainage Area (Acres) Pervious Drainage Area (Acres) Acres Linear Feet Stream Restoration 0 0 0 2,000 Forest Buffer 0 0 5.00 Infiltration w/sand 20 5 0 0
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43 Project Implementation Schedule Near Term Projects little to no permits or permits in process, ownership public or private with cooperating landowner, some partial funding or design Mid Term Projects public ownership, limited permits Long Term Projects- longer permit requirements, ownership issues
44 Appendix Description of Inspection, Operation, and Maintenance of BMPs. For most standard BMPs this information can easily be found in state stormwater manuals. Proprietary BMPs should have information from vendor. Include information on rationale for selecting BMP especially if not one of the TMDL control measures or experimental.
45 Next Steps Track BMP project implementation Refine pollutant load reduction Continue to evaluate planned public municipal infrastructure upgrades Show incremental progress- project location, when constructed, etc.
46 Next Steps Questions? Track BMP project implementation Refine pollutant load reduction Continue to evaluate planned public municipal infrastructure upgrades jas@cwp.org Show incremental progress- project location, when constructed, etc.