62-304.300. St. Marks River Basin TMDLs  


Effective on Sunday, May 9, 2021
  • 1(1) Munson Slough Above Lake Munson. The bacteriological TMDL for Munson Slough is 400 counts/100mL for fecal coliform, and is allocated as follows:

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

    34(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2006 period, will require a 31.6% reduction at sources contributing to exceedances of the criteria at Roberts Ave., and for the 2006 period, will require a 96.9% reduction at sources contributing to exceedances of the criteria at Springhill Road, and for the 1992 to 2007 period, will require a 91.5% reduction at sources contributing to exceedances of the criteria at Capital Circle S.W.; and

    136(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream concentrations meet the fecal coliform criteria which, based on the measured concentrations from the 2006 period, will require a 31.6% reduction at sources contributing to exceedances of the criteria at Roberts Ave., and for the 2006 period, will require a 96.9% reduction at sources contributing to exceedances of the criteria at Springhill Road, and for the 1992 to 2007 period, will require a 91.5% reduction at sources contributing to exceedances of the criteria at Capital Circle S.W.

    230(2) Upper Wakulla River. The nitrate-nitrite TMDL to address the biological impairment is an in-stream monthly mean concentration of 0.35 mg/L and is allocated as follows:

    256(a) The WLA for wastewater sources is not applicable;

    265(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is not applicable; and

    282(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-stream nitrate-nitrite concentrations meet the TMDL target, which, based on the mean concentrations from the 2002-2007 period, will require a 56.2% reduction of nitrate-nitrite at sources contributing to the observed biological impairment.

    330(3) Munson Slough Above Lake Munson. The DO TMDLs are BOD of 2.00 mg/L, TN of 0.72 mg/L, and TP of 0.15 mg/L and are allocated as follows:

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

    368(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-stream concentrations meet the DO dissolved oxygen criterion and TMDL concentrations, which, based on the median concentrations from the 1973-2007 period, will require a 50% reduction for BOD, BOD5, an 8.35% reduction for TN, and a 17.53% reduction for TP at sources contributing to exceedances of the criterion and TMDLs; and

    442(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criterion and the TMDL concentrations, which, based on the median concentrations from the 1973-2007 period, will require a 50% reduction for BOD5, an 8.35% reduction for TN, and a 17.53% reduction for TP at sources contributing to exceedances of the criterion and TMDLs.

    506(4) Lake Munson. The turbidity TMDL is 31 Nephelometric turbidity units (NTUs) and is allocated as follows:

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

    533(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-lake concentrations meet the TMDL concentration, which, based on the median concentrations from the 1986-2007 period, will require a 31.9% reduction at sources contributing to exceedances; and

    583(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-lake concentrations meet the TMDL concentration, which, based on the median concentrations from the 1986-2007 period, will require a 31.9% reduction at sources contributing to exceedances of the TMDL.

    628(5) Lake Munson. The DO and nutrient TMDLs are in-lake concentrations for BOD of 2.00 mg/L, TN of 0.765 mg/L, and TP of 0.044 mg/L and are allocated as follows:

    658(a) The WLA for wastewater sources is not applicable;

    667(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-lake concentrations meet the DO criterion and the nutrient TMDL concentrations, which, based on the mean concentrations from the 2004-2008 period, will require a 50% reduction for BOD, a 32.5% reduction for TN, and a 76.7% reduction for TP at sources contributing to exceedances; and

    735(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-lake concentrations meet the DO criterion and the TMDL concentrations, which, based on the mean concentrations from the 2004-2008 period, will require a 50% reduction for BOD, a 32.5% reduction for TN, and a 76.7% reduction for TP at sources contributing to exceedances of the criterion and BOD and nutrients TMDL concentrations.

    803(6) Munson Slough Below Lake Munson. The DO TMDL is an in-stream concentration for BOD of 2.00 mg/L and is allocated as follows:

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

    836(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criterion and BOD TMDL concentration, which, based on the mean concentration from the period 1986-2007, will require a 52.9% reduction for BOD at sources contributing to exceedances; and

    892(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-stream concentrations meet the DO criterion and the BOD TMDL concentration, which, based on the mean concentrations from the 1986-2007 period, will require a 52.9% reduction for BOD at sources contributing to exceedances of the criteria.

    944(7) Munson Slough Below Lake Munson. The un-ionized ammonia impairment is addressed by reductions in total ammonia. The total ammonia TMDL is an in-stream concentration of 0.32 mg/L and is allocated as follows:

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

    987(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is to address anthropogenic sources in the basin such that in-stream un-ionized ammonia concentrations meet the water quality criterion, which, based on the mean concentration from the period 1971-2007, will require a 33.3% reduction of total ammonia at sources contributing to exceedances; and

    1043(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-stream un-ionized ammonia concentrations meet the water quality criterion, which, based on the mean concentrations from the 1971-2007 period, will require a 33.3% reduction of total ammonia at sources contributing to exceedances.

    1091Rulemaking Authority 1093403.061, 1094403.067 FS. 1096Law Implemented 1098403.061, 1099403.062, 1100403.067 FS. 1102History–New 10-21-08, Amended 3-22-12, 6-7-13, 5-9-21.