Site specific alternative criteria (SSAC) replace the criteria applicable statewide in cases where site specific information supports different numeric criteria. Any SSAC must fully support and protect the designated use of the waterbody. SSACs fall into three types: Type I, Type II, and Type III. Type I SSACs (Rule 62-302.800(1), F.A.C.) are established to reflect natural background conditions, such as lower dissolved oxygen levels than the statewide default criteria. Type II SSACs (Rule 62-302.800(2), F.A.C) are established for situations other than natural background conditions. Type III SSACs (Rule 62-302.800(3), F.A.C.) are limited to nutrient criteria. All types of SSACs must still fully protect the designated use of the water body. Examples of site specific criteria include the Everglades phosphorus criterion (Rule 62-302.540, F.A.C.) and the Site Specific Alternative Criteria described in Rule 62-302.800, F.A.C.
The Florida Department of Environmental Protection (DEP) hosted a virtual public workshop on Wednesday, October 7, 2020, 9:00 a.m. to present Florida Power and Light’s (FPL) petition to establish a Site Specific Alternative Criterion (SSAC) for Total Ammonia Nitrogen (TAN) for the Northwest Mitigation Area wetlands and Barley Barber Swamp in Martin County, Florida.
Links to the technical documentation supporting the proposed SSAC, a map of the proposed SSAC area, draft rule language, an agenda for the public workshop, the public workshop presentation, and comments received are located below.
Site Specific Interpretations of the Narrative Nutrient Criterion
Numeric nutrient criteria that are approved Hierarchy 1interpretations of the narrative nutrient criteria under Rule 62-302.531(2)(a), F.A.C., can include Total Maximum Daily Loads (TMDLs), Level II Water Quality-Based Effluent Limits (WQBELs), Reasonable Assurance Plans (RAPs), and Site Specific Alternative Criteria (addressed above).
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