The Department proposes to establish numeric surface water quality criteria for nutrients and, if necessary, associated standards, such as chlorophyll a. Numeric nutrient criteria and associated standards will be used in determining impairment of surface water quality under Chapter 62-303 of the Florida Administrative Code. During the rule development process, the Department may decide to amend any or all of the rule sections contained in Chapters 62-302 and 62-303 of the Florida Administrative Code.