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Florida Administrative Code (Last Updated: October 28, 2024) |
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62. Department of Environmental Protection |
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D62. Departmental |
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62-304. Total Maximum Daily Loads |
1(1) Rainbow Springs Group and Rainbow Springs Group Run. The nitrate-nitrite TMDL is an in-stream monthly mean concentration of 0.35 mg/L and is allocated as follows:
27(a) The WLA for wastewater sources is not applicable;
36(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 nitrate-nitrite concentrations meet the TMDL target, which, based on the mean concentrations from the 2000-2010 period, will require a 82% reduction of nitrate-nitrite; and
84(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 2000-2011 period, will require a 82% reduction of nitrate-nitrite.
124(2) Lake Juliana. The nutrient TMDL for Lake Juliana is an AGM of 1.03 mg/L TN, which is intended to achieve the applicable AGM chlorophyll 149a 150criterion for low color, high alkalinity lakes, and is allocated as follows:
162(a) The WLA for wastewater point sources is not applicable;
172(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 40% reduction of TN based on mean concentrations from the 2003-2013 period; and
200(c) The LA for nonpoint sources is a 40% reduction of TN based on mean concentrations from the 2003-2013 period.
220(3) 221Gum Springs (Alligator Springs). 225The nutrient TMDL for Gum Springs (Alligator Springs) is an AGM of 0.35 mg/L nitrate-nitrite at the spring vent, and is allocated as follows:
249(a) The WLA for wastewater sources is not applicable;
258(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 78% reduction of nitrate-nitrite (calculated from 2791.58 mg/L), which is based on the highest AGM concentration from the 2912009 – 2017 period; and
296(c) The LA for nonpoint sources is 78304% reduction of nitrate-nitrite (calculated from 1.58 mg/L), which is based on the highest AGM from the 2009 ‒ 2017 period.
325(4) 326Wilson Head Spring. 329The nutrient TMDL for Wilson Head Spring is an AGM of 0.35 mg/L nitrate-nitrite at the spring vent, and is al350located as follows:
353(a) The WLA for wastewater sources is not applicable;
362(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 43% reduction of nitrate-nitrite (calculated from 3830.61 mg/L), which is based on the highest AGM concentration from the 3952009 – 2017 period; and
400(c) The LA for nonpoint sources is 43408% reduction of nitrate-nitrite (calculated from 0.61 mg/L), which is based on the highest AGM from the 2009 426‒ 2017 period.
429(5) 430Blue Spring (Citrus County). 434The nutrient TMDL for Blue Spring (Citrus County) is an AGM of 0.35 mg/L nitrate-nitrite at the spring vent, and is allocated as follows:
458(a) The WLA for wastewater sources is not applicable;
467(b) The WLA for 471discharges subject to the Department’s NPDES MS4 Permitting Program is a 61% reduction of nitrate-nitrite (calculated from 4880.90 mg/L), which is based on the highest AGM concentration from the 5002009 – 2017 period; and
505(c) The LA for nonpoint sources is 61513% reduction of nitrate-nitrite (calculated from 0.90 mg/L), which is based on the highest AGM from the 2009 531‒ 2017 period.
534(6) Lake Agnes. The nutrient TMDL for Lake Agnes is a seven-year average of annual loads of 10,896 lbs/year TN and 618 lbs/year TP, which are intended to achieve the applicable chlorophyll 567a 568criterion for low color and low alkalinity lakes, 576and is allocated as follows:
581(a) The WLA for wastewater point sources is not applicable;
591(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 41% reduction of TN (calculated from 18,552 lbs/year) and a 69% reduction of TP (calculated from 1,979 lbs/year) from the 2000-2016 period; and
631(c) The LA for nonpoint sources is a 41% reduction of TN (calculated from 18,552 lbs/year) and a 69% reduction of TP (calculated from 1,979 lbs/year) based on average loads from the 2000-2016 period.
667Rulemaking Authority 669403.061, 670403.067 FS. 672Law Implemented 674403.061, 675403.062, 676403.067 FS. 678History–New 5-7-13, Amended 12-11-16, 10-29-19, 1-30-20, 5-9-21.
