2013 Fairfax County � STORMWATER STATUS REPORT � A Fairfax County, Va., publication � June 2014 � Photos on cover (from top left): Fish sampling; Wolftrap Creek stream restoration in Vienna, VA; Fish – small mouth bass (Micropterus dolomieu) at Water Quality Field Day; Sampling station being serviced — Occoquan; Water Quality Field Day – Woodley Hills School; Tree planting; Stormwater Management Pond – Noman M. Cole, Jr., Pollution Control Plant. (photo credit Fairfax County) i Report prepared and compiled by: ­ Stormwater Planning Division ­ Department of Public Works and Environmental Services ­ Fairfax County, Virginia 22035 ­ 703-324-5500, TTY 711 ­ www.fairfaxcounty.gov/dpwes/stormwater ­ June 2014 ­ To request this information in an alternate format call 703-324-5500, TTY 711. Fairfax County is committed to nondiscrimination on the basis of disability in all county programs, services and activities. Reasonable accommodations will be provided upon request. For information, call 703-324-5500, TTY 711. ii This page was intentionally left blank. iii ­ iv Table of Contents Table of Contents .............................................................................................................................. iv ­ List of Figures ......................................................................................................................................... vi ­ List of Tables .......................................................................................................................................... vi ­ Acknowledgments ........................................................................................................................... vii ­ 1. ­ Introduction ................................................................................................................................1 ­ 2. Watershed Management Planning ...............................................................................................2 ­ 3. Stormwater Capital Projects .........................................................................................................4 ­ New Construction of Stormwater Management Ponds ......................................................................... 4 ­ Flood Mitigation ..................................................................................................................................... 4 ­ Retrofit of Existing Stormwater Management Facilities ........................................................................ 5 ­ Low Impact Development ...................................................................................................................... 6 ­ Summary of 2013 Low Impact Development Projects ...................................................................... 7 ­ LID Monitoring Efforts ....................................................................................................................... 8 ­ Stream Restoration and Stabilization ................................................................................................ 9 ­ 4. ­ Operations................................................................................................................................. 10 ­ Inspection and Maintenance of Stormwater Management Facilities .................................................. 10 ­ Storm Drainage Infrastructure Management ....................................................................................... 11 ­ Roadways.............................................................................................................................................. 11 ­ Pesticide, Herbicide and Fertilizer Application Program ...................................................................... 12 ­ Industrial and High Risk Runoff Facilities ............................................................................................. 13 ­ Hazardous Materials Spill Prevention and Response ........................................................................... 13 ­ Illicit Discharge and Improper Disposal ................................................................................................ 14 ­ New Development and Significant Redevelopment ............................................................................ 15 ­ Construction Site Erosion and Sediment Control ................................................................................. 15 ­ Land Conservation Awards Program .................................................................................................... 16 ­ Trail Improvements to Address Erosion Issues .................................................................................... 17 ­ Agricultural Land .................................................................................................................................. 17 ­ 5. Monitoring and Assessment ....................................................................................................... 19 ­ Water Quality Monitoring .................................................................................................................... 19 ­ Watershed Monitoring .................................................................................................................... 19 ­ Dry Weather Screening ................................................................................................................... 20 ­ Wet Weather Screening .................................................................................................................. 21 ­ Biological Monitoring ........................................................................................................................... 21 ­ Bacteria Monitoring ............................................................................................................................. 28 ­ USGS Monitoring Network ................................................................................................................... 30 ­ Volunteer monitoring ........................................................................................................................... 31 ­ Virginia Department of Environmental Quality List of Impaired Waters in Fairfax County ................. 32 ­ Table of Contents v 6. Public Outreach and Education ................................................................................................... 34 ­ Illicit Discharges and Improper Disposal ......................................................................................... 34 ­ Local Water Quality Improvement Initiatives ................................................................................. 35 ­ Watershed Cleanups ....................................................................................................................... 35 ­ Stream Buffer Restoration ............................................................................................................... 37 ­ Community Low Impact Development ............................................................................................ 38 ­ Pesticides, Herbicides and Fertilizers .............................................................................................. 40 ­ Proper Disposal of Used Oil, Household Hazardous Waste and Household Yard Waste ................ 41 ­ Clean Water Partners ...................................................................................................................... 42 ­ Educational Opportunities for Students .......................................................................................... 43 ­ Sewer Science .................................................................................................................................. 43 ­ Stormy the Raindrop Educational Campaign .................................................................................. 43 ­ Field Guide ....................................................................................................................................... 44 ­ Reston Association’s Watershed Education Programs for Students ............................................... 44 ­ Envirothon ....................................................................................................................................... 44 ­ Urban Forest Management Division................................................................................................ 44 ­ Other Educational Activities ............................................................................................................ 45 ­ Northern Virginia Soil and Water Conservation District ................................................................. 46 ­ Fairfax County Park Authority ......................................................................................................... 46 ­ Technical Support and Training ....................................................................................................... 47 ­ 7. Flood Response .......................................................................................................................... 48 ­ 8. Literature Cited .......................................................................................................................... 49 ­ vi List of Figures Figure 3-1: Fair Woods pond retrofit. .......................................................................................................... 5 ­ Figure 3-2: South Run Park permeable pavers. ...........................................................................................