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West Virginia Department of Environmental Protection. Draft TMDL Public Meetings August 3,2010 Kingwood, WV August 4, 2010 Blackwater Falls State Park. Cheat River Watershed TMDLs. Agenda. TMDL/ water quality standards recap Overview of this TMDL effort

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west virginia department of environmental protection

West Virginia Department of Environmental Protection

Draft TMDL Public Meetings

August 3,2010 Kingwood, WV

August 4, 2010 Blackwater Falls State Park

Cheat River Watershed TMDLs

agenda
Agenda
  • TMDL/ water quality standards recap
  • Overview of this TMDL effort
  • Explanation/demonstration of electronic documents, spreadsheets, tools
  • Questions and Answers
what s a tmdl
What’s a TMDL?
  • “Total Maximum Daily Load”
  • TMDL is a pollution budget – the amount of pollutants that can be put into a stream before water quality standards are violated
  • TMDL development is required by the Clean Water Act for all streams impaired by a pollutant
what s an impaired stream
What’s an Impaired Stream?
  • Stream that doesn’t meet water quality standards
  • WV Water Quality Standards

are codified in

47CSR2

  • Standards include

“Designated Uses” for

WV waters and the criteria

to protect those uses

  • Water Quality Criteria can

be numeric or narrative

cheat river watershed tmdls criteria of concern
Cheat River Watershed TMDLs Criteria of Concern
  • Total Iron
    • Aquatic Life Protection; Public Water Supply
    • 4-consecutive day average not to exceed 1.5 mg/l more than once in three years (warmwater); 0.5 mg/l (troutwater)
  • Dissolved Aluminum
    • Aquatic Life Protection
    • One-hour average concentration not to exceed 0.75 mg/l more than once in three years
    • 4-consecutive day average not to exceed 0.75 mg/l (warmwater fisheries) more than once in three years; 0.087 mg/l (troutwaters)
  • pH
    • All Uses
    • 6.0 – 9.0 Standard Units at all times
cheat river watershed tmdls criteria of concern6
Cheat River Watershed TMDLsCriteria of Concern
  • Fecal Coliform
    • Water Contact Recreation; Public Water Supply
    • 200 counts/100ml as a monthly geometric mean
    • no more than 10% of samples in a month exceed 400 counts/100ml
  • Total Manganese
    • 1.0 mg/l or less with a five mile zone upstream of a public water intake
cheat river watershed tmdls criteria of concern7
Cheat River Watershed TMDLsCriteria of Concern
  • Biological Impairment
    • Conditions Not Allowable in State Waters
    • (47 CSR 2-3.2i) “.....no significant adverse impact to the chemical, physical, hydrologic or biological components of aquatic ecosystems shall be allowed.”
    • Benthic macroinvertebrate assessment
    • West Virginia Stream Condition Index (WVSCI)
tmdl s wla s la mos
S = “sum of”

WLA = “wasteload allocations”

LA = “load allocations”

MOS = “margin of safety”

WLAs - pollutant loads for “point sources”

Discharge from point

Need NPDES permit

LAs - pollutant loads for “nonpoint sources” and background

Precipitation and runoff

No permit required

TMDL = S WLA + S LA + MOS
cheat watershed tmdl history
Cheat Watershed TMDL History
  • EPA developed Blackwater River Dissolved Oxygen TMDL - 1998
  • EPA developed metals/pH TMDLs for Cheat River and 50 tributaries – 2001
  • This effort reevaluates EPA metals/pH TMDLs plus addresses fecal coliform and biological impairements
cheat watershed tmdl history10
Cheat Watershed TMDL History
  • This WVDEP project:
    • Proposed streams advertised for public comment (Spring 2006)
    • Initial Public Meetings (TMDL 101) - May 2006
    • Watershed Monitoring and Source Tracking - July 2006 - June 2007
    • Allocation Philosophy Meeting – April 2010
    • Draft TMDL Public Meeting - Today
impaired waters
Impaired Waters

99 named streams – See Table 3-3 starting on page 11 of Main Report

modeling
Modeling
  • MDAS (Mining Data Analysis System)
    • Iron, Manganese, Dissolved Aluminum, pH and Fecal Coliform impairments
    • Can handle point and nonpoint sources (representation and allocation)
    • Metals speciation component allows evaluation of dissolved aluminum and pH
    • Recognizes exposure duration and exceedence frequency components of criteria
modeling13
Modeling

22 TMDL watersheds

  • 566 subwatersheds
baseline condition
Design precipitation period

Hourly precipitation data for a six-year period

Design period includes wet and dry years

Applied to present day land uses

Permitted discharges equal to permit limits

Baseline Condition
margin of safety
Margin of Safety
  • Required component of TMDLs
  • Explicit 5% used in most TMDLs
  • TMDL endpoints for numeric criteria are 95% of value (ex. 1.425 mg/l for 1.5 mg/l Fe criterion)
tmdl condition
TMDL Condition
  • Existing pollutant sources reduced such that TMDL endpoints are achieved at each modeled subwatershed
    • Criteria value, duration, exceedence frequency
    • Margin of safety
    • Example – 4-day average concentration of iron in warmwater fishery not greater than 1.425 mg/l more than once every three years
boundary conditions
Boundary Conditions
  • Shavers Fork, Dry Fork, Blackwater River above Beaver Creek
    • Gross allocations – no reductions prescribed
  • Miscellaneous Pennsylvania tributaries in Big Sandy Creek watershed
    • Gross allocations - reductions as necessary to meet TMDL endpoints at the state border
biological impairment tmdls
Biological Impairment TMDLs
  • Stressor identification
    • Define potential stressors/pathways
    • Evaluate chemistry, habitat,

field notes, bugs

    • Determine stressors
  • Stressor/TMDL Linkage
    • Metals /pH Toxicity ................ Al, Fe, pH
    • Organic Enrichment ......FC surrogate
    • Sedimentation ...............Fe Surrogate

Table 4-1, Page 20

Linkage

sedimentation stressor
Sedimentation Stressor
  • Old Approach
    • Select unimpaired reference watershed with similar landuse, ecoregion, geomorphological characteristics
    • Normalized sediment loading in reference watershed is TMDL target for biologically-impaired stream
    • Present Sediment TMDL
  • Cheat TMDL Approach
  • - Correlate TSS and Iron
  • - Model Iron
  • - Present Iron TMDL
  • - Calculate TSS for Fe
  • - Compare to TSS for
  • reference approach
iron tss correlation
Iron /TSS Correlation
  • From Pre-TMDL Monitoring, used stations with >5 quantifiable observations of both Fe and TSS, a positive correlation and R2 >0.5;
  • Fe/TSS correlation = Three “flavors” ranging from 0.020 to 0.066

Ex. 0.020 = 2.0 mg/l Fe per 100 mgl TSS

  • Applied to sediment producing land uses and bank erosion sediment loads
sedimentation stressor23
Sedimentation Stressor
  • All biologically-impaired streams for which sedimentation is a significant stressor are also impaired for iron
  • Sediment reduction needed to meet iron water quality criteria is larger than that needed under reference watershed approach
  • Iron TMDLs are appropriate surrogate
ionic stress
Ionic Stress
  • Crab Orchard Run
  • Insufficient info on causative pollutants and thresholds (SO4, other ions)
  • Biological TMDL development deferred until December 2011
  • Work plan developed
    • DEP monitoring
    • EPA – model enhancements
reduced pollutant sources
Reduced Pollutant Sources
  • Iron
    • Abandoned Mine Lands
    • Upland Sediment sources
    • Residental/Urban Runoff
    • Streambank erosion
    • Active mining permits
reduced pollutant sources26
Reduced Pollutant Sources
  • Fecal Coliform
    • Failing/nonexistent on-site sewage systems
    • Urban/residential land use stormwater runoff
    • Agricultural land use loading
manganese
Manganese
  • Criteria applicable only in five mile stream segments upstream of water supply intakes
  • Impairments only in Heather Run, Lick Run, and Pringle Run watersheds
  • Reductions prescribed only for Abandoned Mine Land sources
ph dissolved aluminum
pH / Dissolved Aluminum
  • Impairments linked; decreased pH causes increased aluminum in dissolved form
  • Atmospheric deposition - Impact of varies by buffering capacity
  • Iron and aluminum reductions to meet criteria decreases acidity
  • Alkalinity additions captured in baseline
ph dissolved aluminum29
pH / Dissolved Aluminum

Allocation Strategy – Pg. 56

Metals/pH spreadsheet, pH LAS tab

implementation activities
Implementation Activities
  • WV/NPDES Permit issuance/reissuance
    • WLAs for mining permits
    • Construction Stormwater General Permits
  • DEP Division of Land Reclamation
    • Office of Abandoned Mine Lands and Reclamation
    • Office of Special Reclamation
  • Public Sewer Projects
    • http://www.wvinfrastructure.com/projects/index.html
  • NPS Regional Coordinator
    • Northern Basin Coordinator, Lou Schmidt (louschmidt@frontiernet.net)
future growth
Future Growth
  • OK......
    • New point source discharges with limits based on achieving water quality criteria “end-of-pipe”
    • “Remining” without specific allocation
    • New sewage discharges w/ 200/400 fecal coliform effluent limits
    • New mining with TSS effluent limits = 35 mg/l avg. mon., 70 mg/l max. daily applicable at all times
    • New Construction Stormwater in accordance with area allowances
future growth construction stormwater
Future Growth – Construction Stormwater
  • 1.5% of area in immediate subwatershed
  • Cumulative area provision
  • See “CSW Future Growth” tab on Metals Allocation spreadsheet
public comment
Public Comment
  • Public Comment period ends August 23, 2010
  • Documents may be reviewed/downloaded from DEP webpage http://www.wvdep.org/
  • CD available upon request – CD includes GIS Shapefiles and Technical Report
  • Comments should be submitted to Steve Young at Stephen.A.Young@wv.gov
  • Questions - contact Dave Montali, Jim Laine, Ben Lowman, Mike McDaniel
    • (304) 926-0499 (Ext 1063, 1061, 1055, 1101)
    • David.A.Montali@wv.gov, James.C.Laine@wv.gov,
    • Michael.L.McDaniel@wv.gov, Ben.M.Lowman@wv.gov
tmdl products
TMDL Products
  • Main Report – Overall description of the Cheat River TMDL development process
  • Technical Report with detailed appendices
tmdl products35
TMDL Products
  • Allocation spreadsheets:
    • Fecal Coliform, Metals, pH
    • TMDL for each stream,

WLAs and LAs by SWS

    • Filterable
  • GIS shapefiles + web-based project coming soon