5520384, 62-304.505 - Florida Administrative Rules, Law, Code, Register

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Notice: 5520384

Notice of Proposed Rule

Department:

DEPARTMENT OF ENVIRONMENTAL PROTECTION

Chapter:

TOTAL MAXIMUM DAILY LOADS

Overview

RULE:

62-304.505

Middle St. Johns River Basin TMDLs

PURPOSE:

The purpose of the rule is to adopt Total Maximum Daily Loads (TMDLs) and their allocations. The TMDLs to be adopted through this rule are for the Wekiva River (including Wekiwa Spring) and Rock Springs Run (nitrate and total phosphorus), Little Wekiva Canal (total nitrogen, total phosphorus, and biochemical oxygen demand), Little Wekiva Canal and Little Wekiva River (fecal coliform), Spring Lake (total nitrogen and total phosphorus), Lake Florida (total nitrogen and total phosphorus), Lake Orienta (total nitrogen and total phosphorus), Lake Adalaide (total nitrogen and total phosphorus), Lake Lawne (total nitrogen and total phosphorus), Silver Lake (total nitrogen and total phosphorus), and Bay Lake (total nitrogen and total phosphorus).

SUMMARY:

These TMDLs address the nutrient impairments in the Wekiva River (including Wekiwa Spring), Rock Springs Run, Spring Lake, Lake Florida, Lake Orienta, Lake Adalaide, Lake Lawne, Silver Lake, and Bay Lake, nutrient and dissolved oxygen impairments in the Little Wekiva Canal, and fecal coliform impairment in the Little Wekiva Canal and the Little Wekiva River, which were verified as impaired using the methodology established in Chapter 62-303, Identification of Impaired Surface Waters, Florida Administrative Code. The percent reduction method was used to develop the nitrate and total phosphorus TMDLs for the Wekiva River (including Wekiwa Spring) and Rock Springs Run, the Watershed Management Model (WMM), and Bathtub Model were used to simulate the total nitrogen and total phosphorus TMDLs for Spring Lake, Lake Florida, Lake Orienta, Lake Adalaide, Lake Lawne, Silver Lake, and Bay Lake. The United States Environmental Protection Agency Storm Water Management Model (SWMM) was used to simulate the BOD, total nitrogen, and total phosphorus TMDLs for Little Wekiva Canal. The load duration analysis method was used to develop the fecal coliform TMDLs for the Little Wekiva Canal and the Little Wekiva River.

RULEMAKING AUTHORITY:

403.061, 403.067 FS.

LAW:

403.031, 403.061, 403.062, 403.067 FS.

PRINT PUBLISH DATE:

4/18/2008 Vol. 34/16

COMMENTS:

From 4/18/2008 To 5/9/2008 (21 Days)
The public comment period for this notice has already expired.

REFERENCE MATERIALS:

No reference(s).

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