Chesapeake Bay TMDL Action Plan and MS4 Program Update. Presentation to the Herndon Town Council. May 5, 2015

Transcription

1 Chesapeake Bay TMDL Action Plan and MS4 Program Update Presentation to the Herndon Town Council May 5, 2015

2 Overview Quick Background Meeting the Chesapeake Bay Restoration Requirements Draft Chesapeake Bay TMDL Action Plan Next Steps MS4 Program Update 2

3 MS4, TMDL, and VSMP Municipal Separate Storm Sewer System (MS4) Requirement of the federal Clean Water Act Regulates discharges from the Town s storm sewer outfalls Six Minimum Control Measures (MCMs) Shifting from Maximum Extent Practicable (MEP) standard to specific reduction requirements Total Maximum Daily Load (TMDL) Required for impaired streams Is the maximum amount of a pollutant in a water body without violating quality standards Virginia DEQ develops the TMDL The MS4 permit requires the Town to develop and implement an action plan 3

4 MS4, TMDL, and VSMP Virginia Stormwater Management Program (VSMP) State mandate; implemented through local ordinances New development must be Chesapeake Bay neutral Redevelopment must reduce pollutants Focus on infiltration rather than detention Herndon s updated stormwater ordinance effective July 1,

5 5 Chesapeake Bay TMDL Action Plan

6 Overview Focus on nitrogen, sediment, and phosphorus Strategy established in Virginia s Watershed Implementation Plan and enforced through the MS4 permit Reductions based on impervious surface cover and extent of the regulated storm drain system Excludes Fairfax County Public Schools properties Excludes areas that drain directly to local streams Schedule for compliance 5% in the current permit cycle (by June 30, 2018) 40% in the second permit cycle (by June 30, 2023) 100% in the third permit cycle (by June 30, 2028) 5% plan due no later than June 30,

7 7 Town of Herndon MS4 Service Area

8 Source Pollutant Existing Acres Served by MS4 (6/30/09) First Permit Cycle Reduction in Loading Rate (lbs/acre) Total Reduction Required First Permit Cycle (lbs/acre/year) Regulated Impervious Regulated Pervious Regulated Impervious Nitrogen 1, , , Reductions Required Before June 30, 2018 Phosphorus 11.6 Regulated Pervious 1, Regulated Impervious Regulated Pervious Total Suspended Solids 1, , , ,

9 Development Offsets Must make up for development one acre or greater between 2009 and 2014 that resulted in an increase in pollutants Two projects qualify (Vinehaven and Monroe Hill) 5% of offset must be achieved prior to June 30, 2018 Offsets Nitrogen = 2.76 lbs/acre/year Phosphorus = 0.40 lbs/acre/year Sediment = lbs/acre/year 9

10 Compliance Strategies Street Sweeping Cooperative Agreement with Fairfax County Joint credit stormwater management projects Redevelopment/Impervious Cover Reduction Wiygul Automotive Dranesville Road and Van Buren Street Median Improvements Secondary Strategies Future redevelopment projects Purchased off-site nutrient credits More stringent single family residential development Additional measures (urban nutrient management, tree planting, impervious cover removal, downspout disconnection, etc.) 10

11 Street Sweeping Existing program exceeds 5% reduction requirement Almost didn t happen due to change in DEQ guidance Town must continue to closely track tonnage collected Missing plan target may mean having to make up pollutant reductions elsewhere 11

12 Cooperative Agreement Signed with Fairfax County and the Town of Vienna Will eventually result in development of a Joint Chesapeake Bay TMDL Action Plan Credits Herndon with a proportion of all projects regardless of location in Fairfax County Herndon s share is 2.9% based on relative pollutant loads Timing requires stand-alone plan for two years Agreement will need to be modified Written to apply only to projects after agreement (2014) Meant to apply to all projects starting from 2009 As an interim measure, plan takes 2.9% credit for projects within the Town boundary 12

13 Fairfax County Stormwater Projects Herndon 2.9% Vienna 2.4% 13

14 Current Shared Projects Completed Project Runnymede Bioretention and Filter Golf Course Pond Retrofit Planned Projects Four Seasons Dry Extended Detention Pond (2016) 14

15 Runnymede Bioretention 15

16 Golf Course Pond 16

17 Four Seasons Dry Extended Detention 17

18 Bottom Line Compliance Total Nitrogen (lbs) Total Phosphorus (lbs) Total Suspended Solids (lbs) Required Reductions from Sources as of Required Offsets from Sources after 2009 = Total Required Reductions - Total Reductions Achieved , , , Credit Moving Forward , How Far Does This Get Herndon To Full 2028 Compliance? 25% 92% 25% 18

19 Next Steps Release draft plan for public input Comments back by June 12 th Complete plan by June 30, 2015 Submit to DEQ for approval by October 1 st Implement practices Report on progress annually to DEQ Coordinate to develop a Joint Chesapeake Bay TMDL Action Plan with Fairfax County and Vienna Will integrate all three plans Deadline of April 1,

20 Other MS4 Milestones

21 Highlights from FY14 Developed Public Education and Outreach Plan Chesapeake Bay Nutrients Bacteria from Pet Waste Illicit Discharges and Dumping from Commercial Operations Updated Illicit Discharge Detection and Elimination Program New focus on accountability and enforcement Updated MS4 Program Plan 21

22 This Year s Efforts Implement New Education and Outreach Plan Messages on Water Bills Outreach to Dog License Holders Outreach to Targeted Commercial Properties Screen 50 Outfalls for Potential Illicit Discharges Determine Impervious Area Served by Stormwater Facilities Pollution Prevention New standard operating procedures for road and parking lot maintenance, equipment maintenance, etc. Expanded training, to include golf course, cemetery, and parks and recreation Update and certify nutrient management plan for golf course Strategy to provide refresher spill response training to emergency response personnel 22

23 Next Year Pollution Prevention Develop Stormwater Pollution Prevention Plan for Town Shop or Golf Course Both need to be developed by FY

24 24 Questions?