6 Development of the Trash TMDL Waste Load Allocation + Load Allocation + Margin of Safety = TMDLIllegal DumpingAccount for UncertaintyMS4CSOThe Goal: Reduction of 100% of the baseline load
7 Development of the Trash TMDL Baseline load for the CSO was developed by monitoring Fresh Creek Netting System at CSO 018 in SW DC.
8 Development of the Trash TMDL Baseline load for the MS4 was developed by monitoring 10 outfalls in the Anacostia watershed.Data collected was used to develop “trash loading” coefficients for 12 land use types (e.g. low density residential, commercial, industrial, etc.).
9 Total Source LoadsCombined Sewer estimated to produce ~94,000 lbs/yr (CSO serves ~49.2% of the watershed)MS4 estimated to produce ~103,000 lbs/yr (MS4 serves ~50.8% of the watershed)Total non-point source load ~ 20,000 lbs/yrMS4
10 The Implementation Strategy Two major policies pushing compliance:District’s MS4 Permit2. The Long Term Control Plan (aka The Clean Rivers Project) for the Combined SewerPer the most recent MS4 permit, the strategy presented today will focus only on addressing the MS4 waste load allocation.
11 The Priority: Addressing Hotspot Sewersheds Avg Trash Load for all sewershedsHotspots are Priorities for Structural Controls
12 The Priority: Addressing Hotspot Sewersheds We currently have installed, or will be installing soon, devices at three out of our six hotspot sewersheds.
13 Examples of Structural Controls Bandalong Litter Traps
14 Examples of Structural Controls Custom trash trap designed, built, and maintained by Anacostia Watershed Society (AWS)
15 Examples of Structural Controls Hickey Run Stormwater BMP
16 The Benefits of Structural Practices 43,000 to 45,000 pounds of trash per year could be captured using structural practices (based on observed efficiencies for currently implemented practices).We will strive over the next four years to install as many structural practices as possible.
17 Non-Structural Practices Not all outfalls are suitable for end-of-pipe treatment.There are issues concerning access, condition of outfalls, etc.If we can’t use structural practices, a suite of non-structural practices will be employed.
18 Non-Structural Practices The following practices will be employed:Education and OutreachRegulatory Approaches (e.g. Bag Law)Street sweeping of environmental hotspotsSkimmer boat activitiesStream and river cleanup activitiesRoadway and block cleanup activities
19 Examples of Non-Structural Practices The Potomac Watershed WideAnti – Littering CampaignHow We Conducted This Research:Watershed-wide Telephone Survey (2008)- 1,004 interviews, randomly sampledIn-Depth Message Testing (2008, 2010)Focus on Active Litterers6 focus groups, 17 one-on-one interviews, Of those, 5 were psych probesEvenly distributed across the regionCreative Drivers:KEY MESSAGE: By choosing to take care of trash, I am protecting myself and my family’s health, happiness and safetySUPPORT: Improperly disposed trash contributes to filth, disease causing bacteria, and toxins harmful to you and those you loveOBJECTIVE: Overcome unconscious rewards and desires to dispose of trash (outside their own backyard) by helping trashers feel empowered and important as caretakers for those they love.Levers for Change:Cares for immediate personal world/spaceHealth of self and familyKids and AnimalsRealistic, Literal ImagesGrassroots Outreach for Non-Traditional Audience
21 Examples of Non-Structural Practices Anacostia River Clean-Up & Protection Act of 2009(the Bag Law)
22 Examples of Non-Structural Practices Beginning in 2011, we implemented an enhanced street sweeping program with DC DPW.DPW now spends an extra two days a month sweeping “environmental hot spots,” or street blocks identified in the 2009 Anacostia Watershed Trash Reduction Plan published by AWS, and funded by DDOE.
23 Load Reduction Calculation Methodology Trash load reduction calculation methodology was developed for the 2012 MS4 Permit Annual Report.The methodology we are presenting today includes pollutant reduction efficiency calculations for the following practices:Street Sweeping Environmental Hotspots in the MS4 AreaTrash Clean-Up EventsSkimmer BoatsHickey Run BMPMarvin Gaye Park (Upper Watts) BandalongNash Run Trash TrapBag Law
24 Load Reduction Calculation Methodology Calculating trash load reductions via street sweeping of environmental hotspots:Using GIS, we estimate we currently sweep 580 acres of roadway in the hotspots580 acres x 50%That gives us 290 acres X lbs/acreThat gives us 9,048 lbs X 16 X 50%(Up to half of the roadway may not be swept at a time because these areas are unsigned)(Trash TMDL loading coefficient for roadways)(DPW sweeps hotspots twice per month, 8 months out of the year. However not all hotspots may be swept, so we only take credit for sweeping half of the area)Total Reduction = 72,384 lbs/yr
25 Load Reduction Calculation Methodology Calculating trash load reductions via clean up events:Based on empirical data collected during the 2012 AWS Earth Day Cleanup,37,647 lbs of trash collected X 16.5%6,212 lbs of trash X 50.8%3,156 lbs of trash X 20%(16.5% of the Anacostia watershed is in the District)(50.8% of the District’s portion ofthe Anacostia served by the MS4)(80% reduction accounts for the fact that not all glass and plastic bottles may have been emptied of water )Total Annual Reduction =631 lbs/yr
26 Load Reduction Calculation Methodology Calculating trash load reductions via Skimmer Boats:Based on data collected by DC Water in 2012700,000 lbs of trash/debris was collected X 16.5%That gives us 115,793 lbs X 50.8%That gives us 58,776 lbs X 50% (50% of the material captured may actually be trash)That gives us 29,388 lbs X 20% (80% reduction accounts for not all plastic and glass bottles being emptied of water)(16.5% of the Anacostia watershed is in the District)( 50.8% of the District’s portion of the Anacostia is served by the MS4)Total Annual Reduction = 5,877 lbs/yr
27 Load Reduction Calculation Methodology Calculating trash collected by the Hickey Run BMP:The BMP was designed to collect at least 10,000 pounds of trash per year10,000 lbs of trash X 20%(80% reduction accounts for the wet weight of trash)Total Annual Reduction = 2,000 lbs/yr
28 Load Reduction Calculation Methodology Calculating trash collected by Marvin Gaye Park Bandalong:Based on empirical data collected between December 2011 & 20122,606 lbs of trash was collected X 2%(Approximately 2% of the Watts Branch watershed that lies within the District drains to the trap)Total Annual Reduction =52 lbs/yr
29 Load Reduction Calculation Methodology Calculating trash collected by the Nash Run Trash Trap:Based on the annual average ( ) for trash collected, the trap is currently collecting 1,894 lbs per year.1,894 lbs of trash collected X 75%(Approximately 75% of the Nash Run watershed lies within the District and drains to the trap)Total Annual Reduction =1,420 lbs/yr
30 Load Reduction Calculation Methodology Calculating trash load reductions for the Bag Law:Establishing the baseline for number of bags in the river and it’s tributariesBased on empirical data collected for the 2008 Anacostia Trash Reduction Plan, we estimate that there are 1.25 bags/foot of stream and 0.11 bags/foot of riverNext, Using GIS we estimated that in the DC portion of the Anacostia watershed there are 62,156 linear feet of stream and 44,469 linear feet of riverSo, 1.25 bags/ foot of stream X 62,156 feet of stream = 77,521 bagsand, 0.11 bags/foot of river X 44,469 feet of river = 4,910 bags77, ,910 = 82,431 bags currently in the Anacostia river and tributaries.
31 Load Reduction Calculation Methodology Estimating the Reduction:82,431 bags X 50.8% (area of the DC Anacostia Watershed served by the MS4)41,875 bags X 50% (According to recent findings, businesses report 50% reduction in their bag purchases)20,937 bags X lbs (weight of standard plastic grocery bag)Total Annual Reduction =272 lbs/yr
32 Load Reduction Calculation Methodology We are currently not applying reduction factors to two of the following structural practices:James Creek Bandalong Litter TrapKenilworth Park Bandalong Litter TrapThe drainage area for both of these devices is located entirely within the District, and within the MS4 area.
33 Load Reduction Calculation Methodology We are currently assessing efficiencies for other practices including:Roadway and Block CleanupsEducation and OutreachAltogether, these conservative estimates show that DC is currently removing 85,218 lbs per year from the Anacostia using structural and non-structural practices.
34 MonitoringTrash was listed as a priority pollutant in the 2012 MS4 Permit.Monitor 6 outfalls throughout the District, including 3 in the Anacostia watershed.This will help us assess whether our efforts are making a difference.
35 Next StepsDDOE will be releasing this draft strategy and load reduction calculation methodology on their website.The draft strategy will be ed to constituents throughout the District and the region.DDOE will be accepting public input through January 31st, 2014.Please submit your comments in writing to Matt Robinson of the Stormwater Management Division (contact info. on next slide).DDOE will continue to update our strategy as new practices are implemented.
36 Implementation Branch Stormwater Management Division Matt RobinsonImplementation BranchStormwater Management DivisionDistrict of Columbia Department of Environment