The TMDLs address certain nutrient impairments in the Upper East Coast Basin. Specifically, the TMDL rules being proposed for adoption are for the Tomoka River (fresh water segment), Halifax River (northern segment), and South Mantanzas River (from the City of Palm Coast to the northern portions of Flagler Beach). These waterbodies were verified as impaired for nutrients using the methodology established in Chapter 62-303, F.A.C., Identification of Impaired Surface Waters. The methodologies used to develop the TMDLs were applications of linear regression and general linear model methods. This rulemaking has been given an OGC case number 12-1391.