The purpose of the rule is to adopt nutrient Total Maximum Daily Loads (TMDLs), and their allocations, for the Volusia Blue Spring and Volusia Blue Spring Run in the Middle St. Johns River Basin. Furthermore, upon paragraph 62-302.531(2)(a), F.A.C., becoming effective, the nitrate TMDL for these segments will constitute a site specific numeric interpretation of the narrative nutrient criterion set forth in paragraph 62-302.530(47)(b), F.A.C., that will supersede the otherwise applicable numeric nutrient criteria in subsection 62-302.531(2), F.A.C., for these particular surface water segments.