Hillsborough River Basin TMDLs  

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    DEPARTMENT OF ENVIRONMENTAL PROTECTION

    RULE NO.: RULE TITLE:
    62-304.610: Hillsborough River Basin TMDLs

    NOTICE OF CHANGE

    Notice is hereby given that the following changes have been made to the proposed rule in accordance with subparagraph 120.54(3)(d)1., F.S., published in Vol. 35, No. 31, August 7, 2009 issue of the Florida Administrative Weekly.

    Please note, a previous Notice of Change was published for this rule in the Vol. 36, No. 7, February 19, 2010 issue and the Vol. 36, No. 17, April 30, 2010 issue of the Florida Administrative Weekly.

     

    THE FULL TEXT OF THE PROPOSED RULE IS:

    62-304.610 Hillsborough River Basin TMDLs.

    (1) through (9) No change.

    (10) Baker Creek. The Total Maximum Daily Loads (TMDLs) to address the low dissolved oxygen and nutrient impairments are an annual average 1.16 mg/L of Total Nitrogen (TN) and an annual average 0.473 mg/L of Total Phosphorus (TP) and are allocated as follows:

    (a) The Wasteload Allocation (WLA) for wastewater point sources is not applicable.

    (b) The WLAs for discharges subject to the Department’s National Pollutant Discharge Elimination System (NPDES) Municipal Stormwater Permitting Program are a 26.1 percent reduction in anthropogenic loadings of TN and a 14.7 percent reduction in anthropogenic loadings of TP for the 2000 to 2007 period at sources contributing to exceedances of the criteria,

    (c) The Load Allocations (LAs) for nonpoint sources are an 26.1 percent reduction in anthropogenic loadings of TN and an 14.7 percent reduction in anthropogenic loadings of TP for the 2000 to 2007 period at sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA for have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    (11) Big Ditch. The TMDLs to address the low dissolved oxygen and nutrient impairments are an annual average 1.16 mg/L of TN and an annual average 0.473 mg/L of TP and are allocated as follows:

    (a) The WLAs for the CF Industries, Inc. Plant City Chemical Complex (FL0000078) are a five-year rolling annual average of 1,800 pounds per year of TN and a five-year rolling annual average of 5,438 pounds per year of TP,

    (b) The WLAs for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program are a 39.7 percent reduction in anthropogenic loadings of TN and a 76.3 percent reduction in anthropogenic loadings of TP for the 2000 to 2007 period at sources contributing to exceedances of the criteria,

    (c) The LAs for nonpoint sources are a 39.7 percent reduction in anthropogenic loadings of TN and a 76.3 percent reduction in anthropogenic loadings of TP for the 2000 to 2007 period at sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    (12) Channelized Stream. The TMDLs to address the low dissolved oxygen and nutrient impairments are an annual average 1.16 mg/L of TN and an annual average of 0.473 mg/L of TP and are allocated as follows:

    (a) The WLA for wastewater point sources is not applicable.

    (b) The WLAs for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program are a 52.1 percent reduction in anthropogenic loadings of TN and a 60.5 percent reduction in anthropogenic loadings of TP for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (c) The LAs for nonpoint sources are a 52.1 percent reduction in anthropogenic loadings of TN and a 60.5 percent reduction in anthropogenic loadings of TP for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    (14) Mill Creek. The TMDLs to address the low dissolved oxygen and nutrient impairments are an annual average 1.16 mg/L of TN and an annual average 0.473 mg/L of TP and are allocated as follows:

    (a) The WLAs for the Kerry I & F Contracting Company (FL0037389) are a five-year rolling annual average 3,600 pounds per year of TN and a five-year rolling annual average 431 pounds per year of TP,

    (b) The WLAs for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program are a 41.1 percent reduction in anthropogenic loadings of TN and a 6.2 percent reduction in anthropogenic loadings of TP for the 2000 to 2007 period for sources contributing to exceedances of the criteria, and

    (c) The LAs for nonpoint sources are a 41.1 percent reduction in anthropogenic loadings of TN and a 6.2 percent reduction in anthropogenic loadings of TP for the 2000 to 2007 period for sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    (15) Spartman Branch. The TMDL to address the low dissolved oxygen impairment is an annual average 1.16 mg/L of TN and allocated as follows:

    (a) The WLA for wastewater point sources is not applicable.

    (b) The WLA for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program is a 19.9 percent reduction in anthropogenic loadings of TN for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (c) The LA for nonpoint sources is a 19.9 percent reduction in anthropogenic loadings of TN for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    (17) Trout Creek. The TMDLs to address the low dissolved oxygen and nutrient impairments are an annual average 0.87 mg/L of TN and an annual average 0.181 mg/L of TP and are allocated as follows:

    (a) The WLAs for the Pebble Creek Village Wastewater Treatment Facility (FL0039896) are a five-year rolling annual average 800 pounds per year of TN and a five-year rolling annual average 411pounds per year of TP,

    (b) The WLAs for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program are a 33.3 percent reduction in anthropogenic loadings of TN and a 1.4 percent reduction in anthropogenic loadings of TP for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (c) The LAs for nonpoint sources are a 33.3 percent reduction in anthropogenic loadings of TN and a 1.4 percent reduction in anthropogenic loadings of TP for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    (18) Two Hole Branch. The TMDL to address the low dissolved oxygen and nutrient impairments is an annual average 1.16 mg/L of TN and is allocated as follows:

    (a) The WLA for wastewater point sources is not applicable.

    (b) The WLA for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program is a 4.4 percent reduction in anthropogenic loadings of TN for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (c) The LA for nonpoint sources is a 4.4 percent reduction in anthropogenic loadings of TN for the 2000-2007 period at sources contributing to exceedances of the criteria, and

    (d) The Margin of Safety is implicit.

    (e) While the LA and WLA have been expressed as the percent reductions needed to attain the applicable Class III criteria, it is the combined reductions from both anthropogenic point and nonpoint sources that will result in the required reductions of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.

    Rulemaking Authority 403.061, 403.067 FS. Law Implemented 403.061, 403.062, 403.067 FS. History–New 12-22-04, Amended 7-7-10,________.

Document Information

Related Rules: (1)
62-304.610. Hillsborough River Basin TMDLs