62-304.325: Choctawhatchee River Basin TMDLs
PURPOSE AND EFFECT: The purpose of the rule is to adopt new Total Maximum Daily Loads (TMDLs), and their allocations, for total nitrogen (TN) and total phosphorus (TP) that have caused low dissolved oxygen (DO) in the Choctawhatchee River Basin. This rule also renumbers certain existing TMDLs.
SUMMARY: These new TMDLs address low DO impairments in the Choctawhatchee River Basin. Specifically, the TMDL rules being proposed for adoption are for Minnow Creek and Sikes Creek. These waterbodies were verified as impaired using the methodology established in Chapter 62-303, F.A.C., Identification of Impaired Surface Waters. The TN and TP targets were set to meet a DO criterion of 5.0 mg/L. The target loads of TN and TP were modeled using the Hydrologic Simulation Program – Fortran (HSPF) model. This rulemaking has been given OGC Case Number 10-1869.
SUMMARY OF STATEMENT OF ESTIMATED REGULATORY COSTS: No Statement of Estimated Regulatory Cost was prepared.
Any person who wishes to provide information regarding a statement of estimated regulatory costs, or provide a proposal for a lower cost regulatory alternative must do so in writing within 21 days of this notice.
SPECIFIC AUTHORITY: 403.061, 403.067 FS.
LAW IMPLEMENTED: 403.061, 403.062, 403.067 FS.
IF REQUESTED WITHIN 21 DAYS OF THE DATE OF THIS NOTICE, A HEARING WILL BE HELD AT THE DATE,TIME AND PLACE SHOWN BELOW(IF NOT REQUESTED, THIS HEARING WILL NOT BE HELD):
DATE AND TIME: Thursday, September 16, 2010, 2:00 p.m.
PLACE: Florida Department of Environmental Protection, Bob Martinez Center, 2600 Blair Stone Road, Room 609, Tallahassee, FL 32399
Pursuant to the provisions of the Americans with Disabilities Act, any person requiring special accommodations to participate in this workshop/meeting is asked to advise the agency at least 5 days before the workshop/meeting by contacting: Ms. Pat Waters at (850)245-8449. If you are hearing or speech impaired, please contact the agency using the Florida Relay Service, 1(800)955-8771 (TDD) or 1(800)955-8770 (Voice). If you are hearing or speech impaired, please contact the agency using the Florida Relay Service, 1(800)955-8771 (TDD) or 1(800)955-8770 (Voice).
THE PERSON TO BE CONTACTED REGARDING THE PROPOSED RULE IS: Jan Mandrup-Poulsen, Division of Environmental Assessment and Restoration, Bureau of Watershed Restoration, Mail Station 3555, Florida Department of Environmental Protection, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400, telephone (850)245-8448
THE FULL TEXT OF THE PROPOSED RULE IS:
62-304.325 Choctawhatchee River Basin TMDLs.
(1) through (2) No change.
(3) Camp Branch. The TMDL for Camp Branch is 400 counts/100mL for fecal coliform, and is allocated as follows:
(a) The WLA for wastewater sources must meet the facility’s permit condition. The WLA is granted to the City of Bonifay Wastewater Treatment Facility (WWTF);
(b) The WLA for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program is not applicable;
(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 2002 to 2009 period, will require an 88 percent reduction of sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA and WLA for fecal coliform 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 reduction of in-stream fecal concentration. However, it is not the intent of the TMDL to abate natural background conditions.
Minnow Creek. The TMDL for Minnow Creek is 400 counts/100mL for fecal coliform, 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 Municipal Stormwater Permitting Program is not applicable;
(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 2002 to 2009 period, will require an 81 percent reduction of sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA for fecal coliform has been expressed as the percent reduction 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 reduction of in-stream fecal concentration. However, it is not the intent of the TMDL to abate natural background conditions.
(4) Minnow Creek. The TMDL for Minnow Creek is 400 counts/100mL for fecal coliform, 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 Municipal Stormwater Permitting Program is not applicable;
(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 2002 to 2009 period, will require an 81 percent reduction of sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA for fecal coliform has been expressed as the percent reduction 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 reduction of in-stream fecal concentration. However, it is not the intent of the TMDL to abate natural background conditions.
Camp Branch. The TMDL for Camp Branch is 400 counts/100mL for fecal coliform, and is allocated as follows:
(a) The WLA for wastewater sources must meet the facility’s permit condition. The WLA is granted to the City of Bonifay Wastewater Treatment Facility (WWTF);
(b) The WLA for discharges subject to the Department’s NPDES Municipal Stormwater Permitting Program is not applicable;
(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 2002 to 2009 period, will require an 88 percent reduction of sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA and WLA for fecal coliform 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 reduction of in-stream fecal concentration. However, it is not the intent of the TMDL to abate natural background conditions.
(5) Minnow Creek. The dissolved oxygen TMDLs for Minnow Creek are 21,310 lbs/year of TN and 3,195lbs/year of TP, 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 Municipal Stormwater Permitting Program is not applicable;
(c) The LAs for nonpoint sources are to address anthropogenic sources in the basin such that in-stream concentrations meet the dissolved oxygen criterion, which, based on the average of the calculated loadings from the 2003 – 2008 period, will require a 30 percent reduction of TN and 31 percent reduction of TP at sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LAs for TN and TP 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 reduction of in-stream TN and TP concentrations. However, it is not the intent of the TMDL to abate natural background conditions.
Sikes Creek. The TMDL for Sikes Creek is 400 counts/100mL for fecal coliform, 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 Municipal Stormwater Permitting Program is not applicable;
(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 2002 to 2009 period, will require a 48 percent reduction of sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA for fecal coliform has been expressed as the percent reduction 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 reduction of in-stream fecal concentration. However, it is not the intent of the TMDL to abate natural background conditions.
(6) Sikes Creek. The TMDL for Sikes Creek is 400 counts/100mL for fecal coliform, 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 Municipal Stormwater Permitting Program is not applicable;
(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 2002 to 2009 period, will require a 48 percent reduction of sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA for fecal coliform has been expressed as the percent reduction 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 reduction of in-stream fecal concentration. However, it is not the intent of the TMDL to abate natural background conditions.
(7) Sikes Creek. The dissolved oxygen TMDL for Sikes Creek is 21,819 lbs/year of 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 Municipal Stormwater Permitting Program is not applicable;
(c) The LA for nonpoint sources is to address anthropogenic sources in the basin such that in-stream concentrations meet the dissolved oxygen criterion, which, based on the average of the calculated loadings from the 2004-2008 period, will require a 24 percent reduction of TN at sources contributing to exceedances of the criteria, and
(d) The Margin of Safety is implicit.
(e) While the LA for TN has 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 reduction of in-stream TN concentration. However, it is not the intent of the TMDL to abate natural background conditions.
Rulemaking Specific Authority 403.061, 403.067 FS. Law Implemented 403.061, 403.062, 403.067 FS. History–New 8-3-06, Amended 8-26-10,________.