This rule has been amended since the last five-year review. New definitions have been added. Subsection R317-1-3(3.3) has been replaced with new procedures for determining limits to pollution of water bodies from excessive nutrients; and Section R317-1-7 has been amended five times since the last five-year review. The limited comments which were received during those rulemaking actions addressed technical issues and were generally of a noncontroversial nature. A new Section R317-1-10 adds a provision for the DWQ to initiate an Independent Scientific Review when the Director determines that an issue may have a significant financial impact on stakeholders or when an action may be precedent-setting or controversial. Comments received during hearings and the public comment periods for the rule changes have been addressed through preparation of responsiveness summaries by DWQ staff and presented to the Water Quality Board for consideration during the rulemaking process.