Chesapeake Bay Pollution Reduction Plan

Transcription

1 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

2 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 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.

4 4 Center for Watershed Protection Stormwater and watershed guidance documents National MS4 Expertise Hands-on technical assistance

5 5 Presentation Overview Introduce the Chesapeake Bay Pollution Reduction Plan How to develop a Plan using PA DEP s 4 step process

6 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 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 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 9 Step 1. Narrative of MS4

10 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 11 Step 1. Narrative of MS4

12 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

13 PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Army Depot in Fairview Township 13

14 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 15 Step 2. Incorporate GI/LID/ESD into Municipal Infrastructure Upgrades Green Infrastructure (GI) Low Impact Development (LID) Environmental Site Design (ESD)

16 16 Step 2. Incorporate GI/LID/ESD into Municipal Infrastructure Upgrades

17 17 Step 2. Incorporate GI/LID/ESD into Municipal Infrastructure Upgrades

18 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

19 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 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 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 22 Step 3. (Optional) Estimate Current Pollutant Loads Modeling programs MapSheds (GWLF)- PSU Chesapeake Assessment and Scenario Tool (CAST)- CBP Others Watershed Treatment Model See CBF webcast on modeling

23 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 24 Step 3. (Optional) Estimate Current Pollutant Loads

25 25 Summary of Reported BMPs Installed from BMP Type Impervious Drainage Area (Acres) Pervious Drainage Area (Acres) Acres Linear Feet Stream Restoration ,000 Forest Buffer Wet Pond/Wetland

26 26 Step 3. (Optional) Estimate Current Pollutant Loads

27 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 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 29 Existing Resources: Watershed plans, stream assessments, etc. Conduct Field Assessments: opportunities at public lands, public sites needing upgrade Location of BMPs

30 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 31 Location of BMPs

32 32 Project ID Jurisdiction/ Party Project Name Project Type Latitude Longitude 1 City of Yellow Main Street Greenway Bioretention East Township Baseball Fields Bioretention Main Township Main Township Municipal Complex Bioretention West Main Township Summer Park Bioretention Hamish Township Broad Street Bioswale Spring Valley 6 Township Michigan Ave Pond Retrofit

33 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 Hellam Township Barshinger Fields Bioretention Bioretention Manchester Township Manchester Township Municipal Complex Bioretention Bioretention West Manchester Township Sunset Park Bioretention Bioretention Hellam Township Ore Bank & Spring Rd Bioswale Bioswale Spring Garden Township Virginia Ave Step Pool Conveyance Bioswale York Township MD & PA CG trail extension Bioswale Bioswale 8City of York Rail Trail (Market-Kings Mill) Porous Pavement Pervious Pavement Fairview Township Pinetown Road-Bike/Ped area Pervious Pavement Pervious Pavement 10York Township Mill Creek Preserve- Parking Lot Porous Pavement Pervious Pavement York Township York Township Park- Parking Lot/Trail porous Pavement Pervious Pavement City of York York City Industrial Park Pond Retrofit Pond Retrofit Dover Township Wyngate Basin Pond Retrofit Pond Retrofit Dover Township Dover Township Community CenterPond Retrofit Pond Retrofit Fairview Township Emily Lane Stormwater Pond Pond Retrofit Pond Retrofit Hellam Township 102 Chelsea Way Pond Retrofit Pond Retrofit Manchester Township I-83 Basin Pond Retrofit Pond Retrofit Shrewsbury Township Deer Creek Initiative- Grace Church Pond Retrofit #1 Pond Retrofit Shrewsbury Township Deer Creek Initiative- Grace Church Pond Retrofit #2 Pond Retrofit Shrewsbury Township Deer Creek Initiative- Giant Food Pond Retrofit #3 Pond Retrofit

34 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)

35 PA Municipal Separate Storm Sewer System (MS4) TMDL Plan Land-use Loading Rate 35

36 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, , , regulated pervious developed 78, ,565, ,070, For spreadsheet use Edge of Stream 36

37 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 * lbs/ac TN = lbs/yr 0.3ac * lbs/ac TN = 5.96 lbs/yr Total TN load to BMP = lbs/yr BMP reduction efficiency for TN= 70% lbs TN *0.70= lbs/yr reduction in TN 37

38 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 $250, Acres Treated 7.5 Acres Treated $34, $50,000 4 acres $4,500 38

39 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 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 41 BMP Type Impervious Drainage Area (Acres) Pervious Drainage Area (Acres) Acres Linear Feet Stream Restoration ,000 Forest Buffer Infiltration w/sand

42 42

43 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 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 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 46 Next Steps Questions? Track BMP project implementation Refine pollutant load reduction Continue to evaluate planned public municipal infrastructure upgrades Show incremental progress- project location, when constructed, etc.