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Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Public Meeting

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Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Public Meeting

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Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Public Meeting

  1. 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Public Meeting December 14 and 15, 2016
  2. 2. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Agenda • Municipal Separate Storm Sewer System (MS4) Overview • Water Quality Protection and Restoration – Impaired Waters – Total Maximum Daily Loads (TMDLs) – TMDL Action Plans • Draft Sediment TMDL Action Plan • Draft Bacteria TMDL Action Plan • Draft Polychlorinated Biphenyls (PCBs) TMDL Action Plan • Next Steps 2
  3. 3. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management/DPWES MS4 Permit Overview • Permit Re-issued to Fairfax County on April 1, 2015 – Compliance coordinated by Stormwater Management – Requirements implemented by many County agencies and partners • Authorizes Specific Discharges from the MS4 to Waters of the State/U.S. 3 • Requires Development and Implementation of an MS4 Program to: – Reduce the contamination of stormwater runoff – Prohibit illicit discharges
  4. 4. Stormwater Management Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Example MS4 Components 4 1 Downspout 2 Untreated runoff 5 Stormwater outfall 6 Urban stream 3 Storm drain 4 Sewer system
  5. 5. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Water Quality Protection and Restoration 5 “The State Water Control Law mandates the protection of existing high-quality state waters and provides for the restoration of all other state waters so they will permit reasonable public uses and will support the growth of aquatic life. The adoption of water quality standards under Section 62.1-44.15(3a) of the law is one of the State Water Control Board's methods of accomplishing the law's purpose.” – Virginia Department of Environmental Quality (DEQ)
  6. 6. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management 6 Virginia’s Water Quality Monitoring, Information and Restoration Act Requires DEQ to: • Monitor and assess surface water quality • Identify surface waters that do not meet Water Quality Standards (WQS) – Impaired waters • Develop plans to address impaired waters – Total Maximum Daily Loads (TMDLs) Water Quality Monitoring and Assessment
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  8. 8. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Next Step – TMDLs • DEQ develops, Virginia State Water Control Board and U.S. Environmental Protection Agency (EPA) approve • A TMDL is a pollutant budget – Amount of a pollutant that a surface water can assimilate and still meet WQS – Must be developed for each impaired water – Pollutant-specific • Generally, TMDL development includes: – Endpoint identification (WQS or reference condition) – Source assessment – Modeling – Pollutant allocations • Wasteload Allocations (WLAs) versus Load Allocations (LAs) – Reasonable assurance of implementation 8
  9. 9. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management An Example TMDL 9 Existing Load Allocated Load PollutantLoad Pollutant Allocations (WLAs +LAs) Margin of Safety TMDL WQS Reduce the existing pollutant load to the total maximum load that is expected to restore water quality
  10. 10. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Approved TMDLs in Fairfax County • Sediment (Benthic Stressor) – Difficult Run – Bull Run (includes Bull Run, Cub Run, Little Rocky Run, and Johnny Moore Creek) – Popes Head Creek • Bacteria (fecal coliform and/or Escherichia coli) – Difficult Run – Four Mile Run – Hunting Creek, Cameron Run, and Holmes Run – Accotink Creek – Popes Head Creek, Bull Run, and the Occoquan River • Polychlorinated biphenyls (PCBs) – Tidal Potomac River (direct drainage areas) 10
  11. 11. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Finally, the TMDL Action Plan Process! • MS4 permit requires development of TMDL Actions Plans where a WLA is assigned to the County’s MS4 • TMDL Action Plans must be submitted to DEQ no later than March 31, 2017 for TMDLs approved prior to April 1, 2015 • Local TMDL Action Plans involve the integration of several efforts: – Delineation of the MS4 service area – Specific local TMDL Action Plan content required by DEQ – Coordination and strategies to meet multiple TMDLs, including the Chesapeake Bay TMDL – Leveraging stream restoration and retrofit projects from the County’s Watershed Management Plans (WMPs) 11
  12. 12. Stormwater Management Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Fairfax County’s MS4 Service Area 12
  13. 13. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Required Local TMDL Action Plan Components • DEQ issued guidance for Local TMDL Action Plan Development on 11/21/16 (GM-16-2006) • Local TMDL Action Plans must include – Name of the final TMDL – Pollutant(s) causing the impairment – The WLA assigned to the MS4 (individually or aggregated) – Assessment of significant sources of the pollutant(s) from facilities owned or operated by the County and not covered by another permit – Existing and new management techniques – Legal authorities to reduce or eliminate the pollutant(s) – Enhancements to public education and employee training programs – An implementation schedule – Methods to assess plan effectiveness – Measurable goals and metrics 13
  14. 14. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Chesapeake Bay TMDL Action Plan • Separate Chesapeake Bay TMDL Action Plan focuses on reducing nitrogen, phosphorus, and sediment loads County-wide • DEQ encourages coordination and strategies to meet multiple TMDLs • For example, the benthic (sediment) Action Plan leverages sediment reductions for the Chesapeake Bay TMDL Action Plan 14
  15. 15. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management However, there are key differences… • Assignment of Pollutant Reductions – Bay TMDL: Specific to Fairfax County – Local TMDLs: Aggregated with other MS4s such as Fairfax County Public Schools (FCPS), Virginia Department of Transportation (VDOT), etc. • Deadline for Compliance – Bay TMDL: Must be achieved over three permit cycles – Local TMDL: Iterative over multiple permit cycles • Sediment Loading Factors – Bay TMDL: Assumes transport loss in sediment reduction from stream restoration to the Bay – Local TMDLs: Full credit for stream restoration • Reduction Efficiencies – Nutrients and Sediment: Techniques have specific reduction credits – PCBs and Bacteria: Mostly non-structural, no specific reduction credit 15
  16. 16. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Watershed Management Plans • Fairfax County developed Watershed Management Plans (WMPs) for each of the County’s 30 watersheds • Plans identify and address issues affecting water quality • Include policies and projects relevant to local TMDLs • Plans can be found at www.fairfaxcounty.gov/dpwes/ watersheds/ 16
  17. 17. Stormwater Management Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Benthic (Sediment) TMDL 17
  18. 18. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Reduction Targets 18 Waterbody Aggregated MS4s Existing Sediment Load (lbs/yr) % Reduction Load Reduction (lbs/yr) Bull Run Fairfax County VDOT FCPS 38,941,000 77.1% 30,039,800 Difficult Run Fairfax County City of Fairfax Town of Vienna VDOT FCPS GW Memorial Parkway 10,633,200 32.0% 3,443,200 Popes Head Creek Fairfax County VDOT FCPS 4,350,000 27.7% 1,207,000
  19. 19. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Key Existing and Planned Program Elements • Control sediment from new development – Erosion and Sedimentation Control Ordinance during construction – Stormwater Management Ordinance post-construction • Achieve load reductions through redevelopment • Identify and eliminate illicit discharges – Dry weather outfall monitoring – Staff training – Public education and reporting mechanisms • Assess opportunities to reduce sediment loads – 2013 County Facility Site Assessment Project – County WMPs • Leverage Chesapeake Bay TMDL Action Plan 19
  20. 20. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Retrofit and Stream Restoration Projects 20
  21. 21. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Reductions To-Date and Next Steps • Continue to coordinate with Chesapeake Bay TMDL Action Plan – Prioritize projects in watersheds with local sediment TMDLs – Implement at least one additional project in each watershed by March 31, 2020 • Reassess approach after Chesapeake Bay TMDL reductions are achieved 21 Waterbody Existing Aggregated Sediment Load (lbs/yr) Load Reduction Required (lbs/yr) Load Reductions Achieved by Fairfax County to Date (lbs/yr) Bull Run 38,941,000 30,039,800 1,407,131 Difficult Run 10,633,200 3,443,200 1,439,143 Popes Head Creek 4,350,000 1,207,000 41,013
  22. 22. Stormwater Management Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Bacteria 22
  23. 23. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Reduction Targets and Sources • TMDL reduction targets range from 83% to 99% • Potential sources: – Sanitary sewer cross-connections – Sanitary sewer overflows – Failing septic systems – Pet waste – Wildlife 23
  24. 24. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Key Existing and Planned Program Elements • Prohibit illicit discharges to the storm sewer system – Stormwater Management Ordinance (County Code Chapter 124) – “Pooper Scooper” law (County Code Section 41.1-2-6) • Identify and eliminate illicit discharges – Dry weather outfall monitoring – Sanitary sewer inspection program – Staff training – Illicit discharge complaint response • Septic system pump out program • Public education and outreach – Storm drain marking – NVRC Clean Water Partners • Geese and deer management programs 24
  25. 25. Stormwater Management Draft TMDL Action Plans for Sediment, Bacteria, and PCBs PCBs 25
  26. 26. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Reduction Targets and Sources • Legacy pollutant banned for most uses in 1979 • Target reduction for areas draining from Fairfax County = 74.7% • Potential sources: – High risk industrial facilities – Improperly discarded fluorescent light ballast manufactured prior to 1979 – Improperly discarded or accidentally damaged transformers • Some existing Dominion transformers may still contain amounts above reportable thresholds – Other electrical equipment containing substances under the trade names Aroclor, Pyranol, Inerteen, and Noflamol • No County-owned facilities are listed in EPA’s PCB Transformer Registration Database 26
  27. 27. Stormwater Management Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Area Affected by TMDL 27
  28. 28. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Key Existing and Planned Program Elements • Same prohibition on illicit discharges and improper disposal as with sediment and bacteria • Industrial and High Risk Runoff (IHRR) program • Enhanced training for County employees: – Potential sources that may be encountered at County facilities and in the field – What to do if equipment, machinery, or contaminated soil is discovered that may contain PCBs 28
  29. 29. Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management Next Steps • Public comment period will run through January 23, 2017 • Draft plan and responses to comments will be presented to the Board of Supervisors’ Environmental Committee on February 7, 2017 • Plan must be submitted to the DEQ by March 31, 2017 • Draft plans are available at: http://www.fairfaxcounty.gov/dpwes/stormwater/sediment-tmdl.pdf http://www.fairfaxcounty.gov/dpwes/stormwater/bacteria-tmdl.pdf http://www.fairfaxcounty.gov/dpwes/stormwater/pcb-tmdl.pdf 29
  30. 30. Additional Information For additional information, please contact www.fairfaxcounty.gov/dpwes Draft TMDL Action Plans for Sediment, Bacteria, and PCBs Stormwater Management 30 Kate Bennett, MS4 Program Coordinator (703) 324-5500 Mailing address: MS4 Program Coordination Section Stormwater Planning Division, Fairfax County DPWES 12000 Government Center Parkway, Suite 449, Fairfax, VA 22035-0052 E-mail address: DPWESMS4mail@fairfaxcounty.gov

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