62-304.506. Wekiva Springs Study Area TMDLs.

(1) Wekiwa Spring. The TMDL for Wekiwa Spring is to achieve 0.286 mg/L nitrate-nitrite and 0.065 mg/L TP for the discharge from Wekiwa Spring, 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 a 79% reduction of nitrate-nitrite and a 64% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is a 79% reduction of nitrate-nitrite and a 64% reduction of TP based on data in the period from 1996 through 2006.

(2) Wekiva River Upstream Segment. The TMDL for the Wekiva River Upstream Segment is to achieve 0.286 mg/L nitrate-nitrite and 0.065 mg/L TP in the stream segment, and is allocated as follows:

(a) The WLA for wastewater sources is 2,805 lbs/month of nitrate-nitrite and 40 lbs/month of TP. The WLA granted to the Wekiva Hunt Club Wastewater Treatment Facility;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program is a 68% reduction of nitrate-nitrite and a 61% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is a 68% reduction of nitrate-nitrite and a 61% reduction of TP based on data in the period from 1996 through 2006.

(3) Wekiva River Downstream Segment. The TMDL for the Wekiva River Downstream Segment are to achieve 0.286 mg/L nitrate-nitrite and 0.065 mg/L TP in the stream segment, and is allocated as follows:

(a) The WLA for wastewater sources are 572 lbs/month of TN and 191 lbs/month of TP granted to the SCES/Yankee Lake Wastewater Reclamation Facility, and 91 lbs/month of nitrate-nitrite and 26 lbs/month of TP granted to the Altamonte Springs Regional Wastewater Reclamation Facility;

(b) The WLA for discharges subject to the Department’s NPDES MS4 Permitting Program are a 47% reduction of nitrate-nitrite and a 57% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources are a 47% reduction of nitrate-nitrite and a 57% reduction of TP based on data in the period from 1996 through 2006.

(4) Rock Springs. The TMDL for Rock Springs is to achieve 0.286 mg/L nitrate-nitrite and 0.065 mg/L TP for the discharge from Rock Springs, 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 a 81% reduction of nitrate-nitrite and a 23% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is a 81% reduction of nitrate-nitrite and a 23% reduction of TP based on data in the period from 1996 through 2006.

(5) Rock Springs Run. The TMDL for Rock Springs Run is to achieve 0.286 mg/L nitrate-nitrite and 0.065 mg/L TP in the stream segment, 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 are a 63% reduction of nitrate-nitrite and a 58% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is a 63% reduction of nitrate-nitrite and a 58% reduction of TP based on data in the period from 1996 through 2006.

(6) Little Wekiva Canal. The DO TMDL for the Little Wekiva Canal is 76,554 lbs/year of BOD and 42,624 lbs/year TN, 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 a 11% reduction of BOD and a 45% reduction of TN based on data in the period from 1997 through 2005; and

(c) The LA for nonpoint sources is 76,554 lbs/year of BOD and 42,624 lbs/year TN based on data in the period from 1997 through 2005.

(7) Little Wekiva Canal and Little Wekiva River: The bacteriological TMDL for the Little Wekiva Canal and the Little Wekiva River is an annual median of 2.06 x 1011 colonies/day for fecal coliform, and is allocated as follows:

(a) The WLA for the City of Altamonte Springs Regional Wastewater Reclamation Facility is 1.19 x 108 colonies/day for fecal coliform;

(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 1996 through 2003 period, will require a 43% reduction at sources contributing to exceedances of the criteria; 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 1996 through 2003 period, will require a 43% reduction of sources contributing to exceedances of the criteria.

(8) Spring Lake. The TMDL for Spring Lake is 8,551 lbs/year of TN and 641 lbs/year of TP, 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 are a 30% reduction of TN and a 65% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources are 8,551 lbs/year of TN and 641 lbs/year of TP based on data in the period from 1996 through 2006.

(9) Lake Florida. The TMDL for Lake Florida is 8,377 lbs/year of TN and 571 lbs/year of TP, 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 a 34% reduction of TN and a 69% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is 8,377 lbs/year of TN and 571 lbs/year of TP based on data in the period from 1996 through 2006.

(10) Lake Orienta. The TMDL for Lake Orienta is 6,092 lbs/year of TN and 451 lbs/year of TP, 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 are a 42% reduction of TN and a 74% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is 6,092 lbs/year of TN and 451 lbs/year of TP based on data in the period from 1996 through 2006.

(11) Lake Adelaide. The TMDL for Lake Adelaide is 3,003 lbs/year of TN and 228 lbs/year of TP, 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 a 40% reduction of TN and a 72% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources are 3,003 lbs/year of TN and 228 lbs/year of TP based on data in the period from 1996 through 2006.

(12) Lake Lawne. The TMDL for Lake Lawne is 21,692 lbs/year of TN and 2,005 lbs/year of TP, 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 a 26% reduction of TN and a 49% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is 21,692 lbs/year of TN and 2,005 lbs/year of TP based on data in the period from 1996 through 2006.

(13) Silver Lake. The TMDL for Silver Lake is 6,241 lbs/year of TN and 370 lbs/year of TP, 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 a 24% reduction of TN and a 70% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is 6,241 lbs/year of TN and 370 lbs/year of TP based on data in the period from 1996 through 2006.

(14) Bay Lake. The TMDL for Bay Lake is 1,428 lbs/year of TN and 109 lbs/year of TP, 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 are a 39% reduction of TN and a 66% reduction of TP based on data in the period from 1996 through 2006; and

(c) The LA for nonpoint sources is 1,428 lbs/year of TN and 109 lbs/year of TP based on data in the period from 1996 through 2006.

Rulemaking Authority 403.061, 403.067 FS. Law Implemented 403.061, 403.062, 403.067 FS. History–New 6-8-08, Amended 5-9-21.