Fla. Admin. Code Ann. R. 62-304.300 - St. Marks River Basin TMDLs
(1)
Munson Slough Above Lake Munson. The bacteriological TMDL for Munson Slough is
400 counts/100mL for fecal coliform, 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 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
(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.
(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:
(a) The WLA for wastewater sources is not
applicable;
(b) The WLA for
discharges subject to the Department's NPDES MS4 Permitting Program is not
applicable; and
(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.
(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:
(a) The WLA for wastewater point sources is
not applicable;
(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
(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.
(4) Lake Munson.
The turbidity TMDL is 31 Nephelometric turbidity units (NTUs) 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 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
(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.
(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:
(a)
The WLA for wastewater sources is not applicable;
(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
(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.
(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:
(a) The WLA for wastewater point sources is
not applicable;
(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
(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.
(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:
(a) The WLA for wastewater point
sources is not applicable;
(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
(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.
Notes
Rulemaking Authority 403.061, 403.067 FS. Law Implemented 403.061, 403.062, 403.067 FS.
New 10-21-08, Amended 3-22-12, 6-7-13, 5-9-21.
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