West Virginia Department of Environmental Protection

1. West Virginia Department of Environmental Protection Rockymarsh Run Status Update March 9, 2016

2. Agenda • “Introduction to TMDLs” recap • Overview of TMDL Project & Status • Overview of Allocation Strategies • Discussion – Free form questions and answers

3. What’s a TMDL? • “Total Maximum Daily Load” • How much pollutant a stream can receive and remain healthy • Pollution Budget - prescribes reductions (where needed) of pollutants that result in the restoration of an impaired stream • TMDL development required by Clean Water Act for streams impaired by a pollutant

4. TMDL = S WLA + S LA + MOS • S = “sum of” • WLA = “wasteloadallocations” • LA = “load allocations” • MOS = “margin of safety” • WLAs - pollutant loads from “point sources” • Discharge from point • Need NPDES permit • LAs - pollutant loads from “nonpoint sources” and background • Precipitation/runoff driven • No permit required

5. What’s an impaired stream? • Stream that doesn’t meet water quality standards • West Virginia Water Quality Standards are codified in 47 CSR 2 • http://www.dep.wv.gov/WWE/Programs/wqs/Documents/Rule%20Approved%20Letter%20and%20Rule%20Itself%202014/WVDEP_WQS_2014Tri-Review_FinalRule47CSR2_June_2014.pdf • Standards include “Designated Uses“ for WV waters and “water quality criteria” to protect those uses • Criteria can be numeric or narrative • Impaired streams are enumerated on the 303(d) list

6. West Virginia Section 303(d) List / Integrated Report

8. Numeric Criteria • Human Health Protection • Fecal Coliform bacteria (Water Contact) • 200 counts/100ml as a monthly geometric mean • no more than 10% of samples in a month exceed 400 counts/100ml • Rockymarsh Run violation rate (400 cts) • 9 of 68 (13%) – 7/13 – 6/14 (TMDL data) • 20 of 114 (17%) - 5/12 – 6/15 (Ag data)

9. Pre-TMDL Monitoring Plan • Impairment/potential impairment sampling suites: • Sed/Fecal/Nutrient – Alkalinity, TSS, T. & Dis. Iron, fecal coliform; T. N, TKN, Nitrate, Nitrite, Ammonia, Phos. (T., Dis,. & Ortho), Mg, Ca. • Sed/Fecal/Nutrient/Bio – all the above plus aquatic bug collection for development of “Limestone Streams” Index • 5 sites on 3 streams • GIS coverage available upon request

10. Rockymarsh Run Watershed 5 sample sites on 3 streams

11. Rockymarsh Run Watershed MDAS model 5 Subwatersheds

12. MDAS Model • Watershed Model • Runs dynamically on a 1-hour time step • Represents land use (hydrologic processes) and river processes • Can include nonpoint and point sources

13. Modeling Approach • Segment watershed • Configure model to represent all sources • Calibrate model for hydrology (flow) and water quality • Fecal • Run MDAS for Baseline conditions (existing) • Run MDAS for TMDL scenario(s)

14. Baseline Conditions

15. Completed: Monitoring Source tracking Baseline Modeling Status Update Meeting Next Steps: Allocations Draft Document Public Meeting EPA Approval Rockymarsh Run WatershedProject Status

16. Allocation Methodology • Universal Reduction of targeted sources • Straight pipes, Failing Septics, etc • Top-down approach • Headwater subwatersheds analyzed first • Allocation strategy dictates order and magnitude of reduction • If necessary, loads are reduced then routed to downstream subwatershed

17. Allocation Methodology • WVDEP priorities: • Ensure criteria compliance at all sws outlets • Target the primary causative sources • Strategy in general • Critical conditions must be considered • Sometimes only one significant source in sws • Always some amount of professional judgement

18. Fecal Coliform Sources • Point sources • MS4 area (Berkeley County) • Nonpoint source • Failing septic systems and/or straight pipe illicit discharges • Stormwater runoff from urban/residential lands • Stormwater runoff from agricultural lands

19. Fecal Coliform Strategy • 100% reduction of all untreated sewage discharges (failing septics, straight pipes) as required by WV Bureau for Public Health regulations • Sensitivity analysis to address severity of agricultural vs. urban/residential impacts

20. WVDEP TMDL Process (4 yrs) • Stream Selection - (4/2013) • Pre-TMDL monitoring, source identification and characterization - (7/2013 – 6/2014) • Contract to model water quality & hydrology – (11/2014) • Determine baseline condition and allocate pollutant loads • Draft Report development • Finalization and EPA approval

21. Rockymarsh Run Watershed TMDL Path Forward • Allocate loads and wasteloads and develop draft report • Formal public comment period and public meeting on the draft TMDLs in Fall 2016 • Address comments, prepare final draft and submit to EPA for approval (final draft will include Response Summary)

22. Contact Information • Comments should be submitted to Steve Young at Stephen.A.Young@wv.gov(10 meg limit for email) • Questions - contact Dave Montali, Jim Laine, Mike McDaniel • (304) 926-0499 • David.A.Montali@wv.gov, James.C.Laine@wv.gov, or Michael.L.McDaniel@wv.gov

23. Discussion/Questions...