9VAC25-720 Water Quality Management Planning Regulation  

  • REGULATIONS
    Vol. 28 Iss. 4 - October 24, 2011

    TITLE 9. ENVIRONMENT
    STATE WATER CONTROL BOARD
    Chapter 720
    Final Regulation

    REGISTRAR'S NOTICE: The following regulatory action is exempt from the Administrative Process Act in accordance with § 2.2-4006 A 4 c of the Code of Virginia, which excludes regulations that are necessary to meet the requirements of federal law or regulations provided such regulations do not differ materially from those required by federal law or regulation. The State Water Control Board will receive, consider, and respond to petitions by any interested person at any time with respect to reconsideration or revision.

    Title of Regulation: 9VAC25-720. Water Quality Management Planning Regulation (amending 9VAC25-720-50).

    Statutory Authority: § 62.1-44.15 of the Code of Virginia; 33 USC § 1313(e) of the federal Clean Water Act.

    Effective Date: November 23, 2011.

    Agency Contact: John Kennedy, Department of Environmental Quality, 629 East Main Street, P.O. Box 10009, Richmond, VA 23240, telephone (804) 698-4312, or email john.kennedy@deq.virginia.gov.

    Summary:

    The regulation is amended to conform with the federal Environmental Protection Agency's Chesapeake Bay total maximum daily load (approved December 29, 2010); specifically, the total nitrogen waste load allocation (WLA) for the Fauquier County Water & Sewer Authority - Vint Hill WWTP (VPDES VA0020460). The amendment increases the total nitrogen WLA from 8,680 to 11,573 lbs/yr. In conjunction with this revision, the associated Footnote #8, which conditioned the nutrient WLAs on securing a certificate to operate for an expanded design flow by December 31, 2011, was deleted.

    9VAC25-720-50. Potomac-Shenandoah River Basin.

    A. Total Maximum Daily Load (TMDLs).

    TMDL #

    Stream Name

    TMDL Title

    City/County

    WBID

    Pollutant

    WLA

    Units

    1.

    Muddy Creek

    Nitrate TMDL Development for Muddy Creek/Dry River, Virginia

    Rockingham

    B21R

    Nitrate

    49,389.00

    LB/YR

    2.

    Blacks Run

    TMDL Development for Blacks Run and Cooks Creek

    Rockingham

    B25R

    Sediment

    32,844.00

    LB/YR

    3.

    Cooks Creek

    TMDL Development for Blacks Run and Cooks Creek

    Rockingham

    B25R

    Sediment

    69,301.00

    LB/YR

    4.

    Cooks Creek

    TMDL Development for Blacks Run and Cooks Creek

    Rockingham

    B25R

    Phosphorus

    0

    LB/YR

    5.

    Muddy Creek

    TMDL Development for Muddy Creek and Holmans Creek, Virginia

    Rockingham

    B22R

    Sediment

    286,939.00

    LB/YR

    6.

    Muddy Creek

    TMDL Development for Muddy Creek and Holmans Creek, Virginia

    Rockingham

    B22R

    Phosphorus

    38.00

    LB/YR

    7.

    Holmans Creek

    TMDL Development for Muddy Creek and Holmans Creek, Virginia

    Rockingham/
    Shenandoah

    B45R

    Sediment

    78,141.00

    LB/YR

    8.

    Mill Creek

    TMDL Development for Mill Creek and Pleasant Run

    Rockingham

    B29R

    Sediment

    276.00

    LB/YR

    9.

    Mill Creek

    TMDL Development for Mill Creek and Pleasant Run

    Rockingham

    B29R

    Phosphorus

    138.00

    LB/YR

    10.

    Pleasant Run

    TMDL Development for Mill Creek and Pleasant Run

    Rockingham

    B27R

    Sediment

    0.00

    LB/YR

    11.

    Pleasant Run

    TMDL Development for Mill Creek and Pleasant Run

    Rockingham

    B27R

    Phosphorus

    0.00

    LB/YR

    12.

    Linville Creek

    Total Maximum Daily Load Development for Linville Creek: Bacteria and Benthic Impairments

    Rockingham

    B46R

    Sediment

    5.50

    TONS/YR

    13.

    Quail Run

    Benthic TMDL for Quail Run

    Rockingham

    B35R

    Ammonia

    7,185.00

    KG/YR

    14.

    Quail Run

    Benthic TMDL for Quail Run

    Rockingham

    B35R

    Chlorine

    27.63

    KG/YR

    15.

    Shenandoah River

    Development of Shenandoah River PCB TMDL (South Fork and Main Stem)

    Warren & Clarke

    B41R B55R B57R B58R

    PCBs

    179.38

    G/YR

    16.

    Shenandoah River

    Development of Shenandoah River PCB TMDL (North Fork)

    Warren & Clarke

    B51R

    PCBs

    0.00

    G/YR

    17.

    Shenandoah River

    Development of Shenandoah River PCB TMDL (Main Stem)

    Warren & Clarke

    WV

    PCBs

    179.38

    G/YR

    18.

    Cockran Spring

    Benthic TMDL Reports for Six Impaired Stream Segments in the Potomac-Shenandoah and James River Basins

    Augusta

    B10R

    Organic Solids

    1,556.00

    LB/YR

    19.

    Lacey Spring

    Benthic TMDL Reports for Six Impaired Stream Segments in the Potomac-Shenandoah and James River Basins

    Rockingham

    B47R

    Organic Solids

    680.00

    LB/YR

    20.

    Orndorff Spring

    Benthic TMDL Reports for Six Impaired Stream Segments in the Potomac-Shenandoah and James River Basins

    Shenandoah

    B52R

    Organic Solids

    103.00

    LB/YR

    21.

    Toms Brook

    Benthic TMDL for Toms Brook in Shenandoah County, Virginia

    Shenandoah

    B50R

    Sediment

    8.1

    T/YR

    22.

    Goose Creek

    Benthic TMDLs for the Goose Creek Watershed

    Loudoun, Fauquier

    A08R

    Sediment

    1,587

    T/YR

    23.

    Little River

    Benthic TMDLs for the Goose Creek Watershed

    Loudoun

    A08R

    Sediment

    105

    T/YR

    24.

    Christians Creek

    Fecal Bacteria and General Standard Total Maximum Daily Load Development for Impaired Streams in the Middle River and Upper South River Watersheds, Augusta County, VA

    Augusta

    B14R

    Sediment

    145

    T/YR

    25.

    Moffett Creek

    Fecal Bacteria and General Standard Total Maximum Daily Load Development for Impaired Streams in the Middle River and Upper South River Watersheds, Augusta County, VA

    Augusta

    B13R

    Sediment

    0

    T/YR

    26.

    Upper Middle River

    Fecal Bacteria and General Standard Total Maximum Daily Load Development for Impaired Streams in the Middle River and Upper South River Watersheds, Augusta County, VA

    Augusta

    B10R

    Sediment

    1.355

    T/YR

    27.

    Mossy Creek

    Total Maximum Daily Load Development for Mossy Creek and Long Glade Run: Bacteria and General Standard (Benthic) Impairments

    Rockingham

    B19R

    Sediment

    0.04

    T/YR

    28.

    Smith Creek

    Total Maximum Daily Load (TMDL) Development for Smith Creek

    Rockingham, Shenandoah

    B47R

    Sediment

    353,867

    LB/YR

    29.

    Abrams Creek

    Opequon Watershed TMDLs for Benthic Impairments: Abrams Creek and Lower Opequon Creek, Frederick and Clarke counties, Virginia

    Frederick

    B09R

    Sediment

    478

    T/YR

    30.

    Lower Opequon Creek

    Opequon Watershed TMDLs for Benthic Impairments: Abrams Creek and Lower Opequon Creek, Frederick and Clarke counties, Virginia

    Frederick, Clarke

    B09R

    Sediment

    1,039

    T/YR

    31.

    Mill Creek

    Mill Creek Sediment TMDL for a Benthic Impairment, Shenandoah County, Virginia

    Shenandoah

    B48R

    Sediment

    0.9

    T/YR

    32.

    South Run

    Benthic TMDL Development for South Run, Virginia

    Fauquier

    A19R

    Phosphorus

    0.038

    T/YR

    33.

    Lewis Creek

    Total Maximum Daily Load Development for Lewis Creek, General Standard (Benthic)

    Augusta

    B12R

    Sediment

    40

    T/YR

    34.

    Lewis Creek

    Total Maximum Daily Load Development for Lewis Creek, General Standard (Benthic)

    Augusta

    B12R

    Lead

    0

    KG/YR

    35.

    Lewis Creek

    Total Maximum Daily Load Development for Lewis Creek, General Standard (Benthic)

    Augusta

    B12R

    PAHs

    0

    KG/YR

    36.

    Bull Run

    Total Maximum Daily Load Development for Lewis Creek, General Standard (Benthic)

    Loudoun, Fairfax, and Prince William counties, and the Cities of Manassas and Manassas Park

    A23R-01

    Sediment

    5,986.8

    T/TR

    37.

    Popes Head Creek

    Total Maximum Daily Load Development for Lewis Creek, General Standard (Benthic)

    Fairfax County and Fairfax City

    A23R-02

    Sediment

    1,594.2

    T/YR

    38.

    Accotink Bay

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A15R

    PCBs

    0.0992

    G/YR

    39.

    Aquia Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Stafford

    A28E

    PCBs

    6.34

    G/YR

    40.

    Belmont Bay/
    Occoquan Bay

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Prince William

    A25E

    PCBs

    0.409

    G/YR

    41.

    Chopawamsic Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Prince William

    A26E

    PCBs

    1.35

    G/YR

    42.

    Coan River

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Northumberland

    A34E

    PCBs

    0

    G/YR

    43.

    Dogue Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A14E

    PCBs

    20.2

    G/YR

    44.

    Fourmile Run

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Arlington

    A12E

    PCBs

    11

    G/YR

    45.

    Gunston Cove

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A15E

    PCBs

    0.517

    G/YR

    46.

    Hooff Run & Hunting Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A13E

    PCBs

    36.8

    G/YR

    47.

    Little Hunting Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A14E

    PCBs

    10.1

    G/YR

    48.

    Monroe Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A31E

    PCBs

    .0177

    G/YR

    49.

    Neabsco Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Prince William

    A25E

    PCBs

    6.63

    G/YR

    50.

    Occoquan River

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Prince William

    A25E

    PCBs

    2.86

    G/YR

    51.

    Pohick Creek/Pohick Bay

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Fairfax

    A16E

    PCBs

    13.5

    G/YR

    52.

    Potomac Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Stafford

    A29E

    PCBs

    0.556

    G/YR

    53.

    Potomac River, Fairview Beach

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    King George

    A29E

    PCBs

    0.0183

    G/YR

    54.

    Powells Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Prince William

    A26R

    PCBs

    0.0675

    G/YR

    55.

    Quantico Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    Prince William

    A26R

    PCBs

    0.742

    G/YR

    56.

    Upper Machodoc Creek

    PCB Total Maximum Daily Load Development in the tidal Potomac and Anacostia Rivers and their tidal tributaries

    King George

    A30E

    PCBs

    0.0883

    G/YR

    57.

    Difficult Creek

    Benthic TMDL Development for Difficult Run, Virginia

    Fairfax

    A11R

    Sediment

    3,663.2

    T/YR

    58.

    Abrams Creek

    Opequon Watershed TMDLs for Benthic Impairments

    Frederick and Clark

    B09R

    Sediment

    1039

    T/YR

    59.

    Lower Opequon

    Opequon Watershed TMDLs for Benthic Impairments

    Frederick and Clark

    B09R

    Sediment

    1039

    T/YR

    60.

    South River

    Bacteria and Benthic Total Maximum Daily Load Development for South River

    Augusta and Rockingham

    B32R

    Sediment

    619.4

    T/YR

    61.

    South River

    Bacteria and Benthic Total Maximum Daily Load Development for South River

    Augusta and Rockingham

    B32R

    Phosphorus

    6,929.9

    KG/YR

    62.

    South River

    Total Maximum Daily Load Development for Mercury in the South River, South Fork Shenandoah River, and Shenandoah River, Virginia

    Augusta, Rockingham, Page, and Warren

    B32R

    Mercury

    112

    G/YR

    63.

    South Fork Shenandoah River

    Total Maximum Daily Load Development for Mercury in the South River, South Fork Shenandoah River, and Shenandoah River, Virginia

    Augusta, Rockingham, Page, and Warren

    B32R, B33R

    Mercury

    112

    G/YR

    64.

    Shenandoah River

    Total Maximum Daily Load Development for Mercury in the South River, South Fork Shenandoah River, and Shenandoah River, Virginia

    Augusta, Rockingham, Page, and Warren

    B32R, B33R

    Mercury

    112

    G/YR

    65.

    Spout Run

    Total Maximum Daily Load Development to Address Bacteria and Benthic Impairments in the Spout Run Watershed, Clarke County, Virginia

    Clarke

    B57R

    Sediment

    7.44

    T/YR

    66.

    West Strait Creek

    Benthic Total Maximum Daily Load Development for Strait Creek and West Strait Creek

    Highland

    B02R

    Sediment

    0.02

    T/D

    67.

    West Strait Creek

    Benthic Total Maximum Daily Load Development for Strait Creek and West Strait Creek

    Highland

    B02R

    CBOD5

    11

    KG/D

    68.

    West Strait Creek

    Benthic Total Maximum Daily Load Development for Strait Creek and West Strait Creek

    Highland

    B02R

    Dry season (June – December) ammonia as N

    1.6

    KG/D

    69.

    West Strait Creek

    Benthic Total Maximum Daily Load Development for Strait Creek and West Strait Creek

    Highland

    B02R

    Wet season (January – May) ammonia as N

    2.9

    KG/D

    70.

    Strait Creek

    Benthic Total Maximum Daily Load Development for Strait Creek and West Strait Creek

    Highland

    B02R

    Sediment

    0.08

    T/D

    B. Non-TMDL waste load allocations.

    Water Body

    Permit No.

    Facility Name

    Outfall No.

    Receiving Stream

    River Mile

    Parameter Description

    WLA

    Units WLA

    VAV-B02R

    VA0023281

    Monterey STP

    001

    West Strait Creek

    3.85

    CBOD5

    11.4

    KG/D

    VAV-B08R

    VA0065552

    Opequon Water Reclamation Facility

    001

    Opequon Creek

    32.66

    BOD5, JUN-NOV

    207

    KG/D

    AKA Winchester - Frederick Regional

    CBOD5, DEC-MAY

    1514

    KG/D

    VAV-B14R

    VA0025291

    Fishersville Regional STP

    001

    Christians Creek

    12.36

    BOD5

    182

    KG/D

    VAV-B23R

    VA0060640

    North River WWTF

    001

    North River

    15.01

    CBOD5, JAN-MAY

    700

    KG/D

    7.23.04

    AKA Harrisonburg - Rockingham Reg. Sewer Auth.

    CBOD5, JUN-DEC

    800

    KG/D

    TKN, JUN-DEC

    420

    KG/D

    TKN, JAN-MAY

    850

    KG/D

    VAV-B32R

    VA0002160

    INVISTA - Waynesboro Formerly Dupont - Waynesboro

    001

    South River

    25.3

    BOD5

    272

    KG/D

    VAV-B32R

    VA0025151

    Waynesboro STP

    001

    South River

    23.54

    CBOD5

    227

    KG/D

    CBOD5, JUN-OCT

    113.6

    KG/D

    VAV-B32R

    VA0028037

    Skyline Swannanoa STP

    001

    South River UT

    2.96

    BOD5

    8.5

    KG/D

    VAV-B35R

    VA0024732

    Massanutten Public Service STP

    001

    Quail Run

    5.07

    BOD5

    75.7

    KG/D

    VAV-B37R

    VA0002178

    Merck & Company

    001

    S.F. Shenandoah River

    88.09

    BOD5

    1570

    KG/D

    AMMONIA, AS N

    645.9

    KG/D

    VAV-B49R

    VA0028380

    Stoney Creek Sanitary District STP

    001

    Stoney Creek

    19.87

    BOD5, JUN-NOV

    29.5

    KG/D

    VAV-B53R

    VA0020982

    Middletown STP

    001

    Meadow Brook

    2.19

    CBOD5

    24.0

    KG/D

    VAV-B58R

    VA0020532

    Berryville STP

    001

    Shenandoah River

    24.23

    CBOD5

    42.6

    KG/D

    C. Nitrogen and phosphorus waste load allocations to restore the Chesapeake Bay and its tidal rivers. The following table presents nitrogen and phosphorus waste load allocations for the identified significant dischargers and the total nitrogen and total phosphorus waste load allocations for the listed facilities.

    Virginia Waterbody ID

    Discharger Name

    VPDES Permit No.

    Total Nitrogen (TN) Waste Load Allocation (lbs/yr)

    Total Phosphorus (TP) Waste Load Allocation (lbs/yr)

    B37R

    Coors Brewing Company

    VA0073245

    54,820

    4,112

    B14R

    Fishersville Regional STP

    VA0025291

    48,729

    3,655

    B32R

    INVISTA - Waynesboro (Outfall 101)

    VA0002160

    78,941

    1,009

    B39R

    Luray STP

    VA0062642

    19,492

    1,462

    B35R

    Massanutten PSA STP

    VA0024732

    18,273

    1,371

    B37R

    Merck - Stonewall WWTP (Outfall 101) (10) (9)

    VA0002178

    43,835

    4,384

    B12R

    Middle River Regional STP

    VA0064793

    82,839

    6,213

    B23R

    North River WWTF (2)

    VA0060640

    253,391

    19,004

    B22R

    VA Poultry Growers -Hinton

    VA0002313

    27,410

    1,371

    B38R

    Pilgrims Pride - Alma

    VA0001961

    18,273

    914

    B31R

    Stuarts Draft WWTP

    VA0066877

    48,729

    3,655

    B32R

    Waynesboro STP

    VA0025151

    48,729

    3,655

    B23R

    Weyers Cave STP

    VA0022349

    6,091

    457

    B58R

    Berryville STP

    VA0020532

    8,528

    640

    B55R

    Front Royal STP

    VA0062812

    48,729

    3,655

    B49R

    Georges Chicken LLC

    VA0077402

    31,065

    1,553

    B48R

    Mt. Jackson STP (3)

    VA0026441

    8,528

    640

    B45R

    New Market STP

    VA0022853

    6,091

    457

    B45R

    North Fork (SIL) WWTF

    VA0090263

    23,390

    1,754

    B49R

    Stoney Creek SD STP

    VA0028380

    7,309

    548

    B50R

    North Fork Regional WWTP (1)

    VA0090328

    9,137

    685

    B51R

    Strasburg STP

    VA0020311

    11,939

    895

    B50R

    Woodstock STP

    VA0026468

    24,364

    1,827

    A06R

    Basham Simms WWTF (4)

    VA0022802

    18,273

    1,371

    A09R

    Broad Run WRF (5)

    VA0091383

    134,005

    3,350

    A08R

    Leesburg WPCF

    MD0066184

    121,822

    9,137

    A06R

    Round Hill Town WWTF

    VA0026212

    9,137

    685

    A25R

    DSC - Section 1 WWTF (6)

    VA0024724

    42,029

    2,522

    A25R

    DSC - Section 8 WWTF (7)

    VA0024678

    42,029

    2,522

    A25E

    H L Mooney WWTF

    VA0025101

    219,280

    13,157

    A22R

    UOSA - Centreville

    VA0024988

    1,315,682

    16,446

    A19R

    Vint Hill WWTF (8)

    VA0020460

    8,680 11,573

    868

    B08R

    Opequon WRF (11) (10)

    VA0065552

    121,851

    11,512

    B08R

    Parkins Mills STP (9) (8)

    VA0075191

    60,911

    4,568

    A13E

    Alexandria SA WWTF

    VA0025160

    493,381

    29,603

    A12E

    Arlington County Water PCF

    VA0025143

    365,467

    21,928

    A16R

    Noman M Cole Jr PCF

    VA0025364

    612,158

    36,729

    A12R

    Blue Plains (VA Share)

    DC0021199

    581,458

    26,166

    A26R

    Quantico WWTF

    VA0028363

    20,101

    1,206

    A28R

    Aquia WWTF

    VA0060968

    73,093

    4,386

    A31E

    Colonial Beach STP

    VA0026409

    18,273

    1,827

    A30E

    Dahlgren WWTF

    VA0026514

    9,137

    914

    A29E

    Fairview Beach

    MD0056464

    1,827

    183

    A30E

    US NSWC-Dahlgren WWTF

    VA0021067

    6,578

    658

    A31R

    Purkins Corner STP

    VA0070106

    1,096

    110

    TOTALS:

    5,156,169

    246,635

    NOTE: (1) Shenandoah Co. - North Fork Regional WWTP waste load allocations (WLAs) based on a design flow capacity of 0.75 million gallons per day (MGD). If plant is not certified to operate at 0.75 MGD design flow capacity by December 31, 2010, the WLAs will be deleted and facility removed from Significant Discharger List.

    (2) Harrisonburg-Rockingham Regional S.A.-North River STP: waste load allocations (WLAs) based on a design flow capacity of 20.8 million gallons per day (MGD). If plant is not certified to operate at 20.8 MGD design flow capacity by December 31, 2011, the WLAs will decrease to TN = 194,916 lbs/yr; TP = 14,619 lbs/yr, based on a design flow capacity of 16.0 MGD.

    (3) Mount Jackson STP: waste load allocations (WLAs) based on a design flow capacity of 0.7 million gallons per day (MGD). If plant is not certified to operate at 0.7 MGD design flow capacity by December 31, 2010, the WLAs will decrease to TN = 7,309 lbs/yr; TP = 548 lbs/yr, based on a design flow capacity of 0.6 MGD.

    (4) Purcellville-Basham Simms STP: waste load allocations (WLAs) based on a design flow capacity of 1.5 million gallons per day (MGD). If plant is not certified to operate at 1.5 MGD design flow capacity by December 31, 2010, the WLAs will decrease to TN = 12,182 lbs/yr; TP = 914lbs/yr, based on a design flow capacity of 1.0 MGD.

    (5) Loudoun Co. S.A.-Broad Run WRF: waste load allocations (WLAs) based on a design flow capacity of 11.0 million gallons per day (MGD). If plant is not certified to operate at 11.0 MGD design flow capacity by December 31, 2010, the WLAs will decrease to TN = 121,822 lbs/yr; TP = 3,046 lbs/yr, based on a design flow capacity of 10.0 MGD.

    (6) Dale Service Corp.-Section 1 WWTF: waste load allocations (WLAs) based on a design flow capacity of 4.6 million gallons per day (MGD). If plant is not certified to operate at 4.6 MGD design flow capacity by December 31, 2010, the WLAs will decrease to TN = 36,547 lbs/yr; TP = 2,193 lbs/yr, based on a design flow capacity of 4.0 MGD.

    (7) Dale Service Corp.-Section 8 WWTF: waste load allocations (WLAs) based on a design flow capacity of 4.6 million gallons per day (MGD). If plant is not certified to operate at 4.6 MGD design flow capacity by December 31, 2010, the WLAs will decrease to TN = 36,547 lbs/yr; TP = 2,193 lbs/yr, based on a design flow capacity of 4.0 MGD.

    (8) Fauquier Co. W&SA-Vint Hill STP: waste load allocations (WLAs) based on a design flow capacity of 0.95 million gallons per day (MGD). If plant is not certified to operate at 0.95 MGD design flow capacity by December 31, 2011, the WLAs will decrease to TN = 5,482 lbs/yr; TP = 548 lbs/yr, based on a design flow capacity of 0.6 MGD.

    (9) (8) Parkins Mill STP: waste load allocations (WLAs) based on a design flow capacity of 5.0 million gallons per day (MGD). If plant is not certified to operate at 5.0 MGD design flow capacity by December 31, 2010, the WLAs will decrease to TN = 36,547 lbs/yr; TP = 2,741 lbs/yr, based on a design flow capacity of 3.0 MGD.

    (10) (9) Merck-Stonewall – (a) these waste load allocations will be subject to further consideration, consistent with the Chesapeake Bay TMDL, as it may be amended, and possible reduction upon "full-scale" results showing the optimal treatment capability of the 4-stage Bardenpho technology at this facility consistent with the level of effort by other dischargers in the region. The "full scale" evaluation will be completed by December 31, 2011, and the results submitted to DEQ for review and subsequent board action; (b) in any year when credits are available after all other exchanges within the Shenandoah-Potomac River Basin are completed in accordance with § 62.1-44.19:18 of the Code of Virginia, Merck shall acquire credits for total nitrogen discharged in excess of 14,619 lbs/yr and total phosphorus discharged in excess of 1,096 lbs/yr; and (c) the allocations are not transferable and compliance credits are only generated if discharged loads are less than the loads identified in clause (b).

    (11) (10) Opequon WRF: (a) the TN WLA is derived based on 3 mg/l of TN and 12.6 MGD; (b) the TN WLA includes an additional allocation for TN in the amount of 6,729 lbs/yr by means of a landfill leachate consolidation and treatment project; and (c) the TP WLA is derived based on 0.3 mg/l of TP and 12.6 MGD.

    VA.R. Doc. No. R12-2981; Filed September 26, 2011, 3:40 p.m.

Document Information

Rules:
9VAC25-720-50