In Sections R317-2-3.3 and R317-2-11, the public notice and comment periods were extended to provide the public more time to review and comment on sometimes complicated proposals. In Section R317-2-3.5, the requirement that permitted discharges to Class 1C (potable water) waters always conduct a Level II antidegradation review is proposed to be deleted. Level II antidegradation reviews are still required for permitted discharges to Class 1C waters for new permits and for any increases in concentration or effluent loads for existing permits because of previous revisions to these rules. In Section R317-2-13, the recreation uses for Mill Creek in Grand County and Utah Lake in Utah County are proposed to be changed from infrequent primary and secondary contact recreation to frequent primary and secondary contact recreation (Class 2A) because people commonly swim in these waters. This change was requested by the local watershed group and endorsed by the federal land management agency. Descriptions of the waters with site-specific criteria in Section R317-2-14 were added to Section R317-2-13 with an asterisk identifying the affected use. These were added for the convenience of the users. This is a nonsubstantive change because no uses or criteria are revised. The Class 1C drinking water use is added to Grove and Battle Creeks in Utah County at the request of American Fork City. The affected waters are used as a source for drinking water. The aquatic life use is changed from Class 3D (waterfowl, shorebirds and their food chain) to Class 3A (cold water species of game fish, other cold water aquatic life and their food chain) based on an investigation of aquatic life present. In Table 2.14.1, deletion of the temperature-dependent criterion for fluoride for the Class 1C potable water use is proposed to be replaced with the current USEPA drinking water maximum contaminant level. The criteria for several pollutants are proposed to be moved from Table 2.14.6 to Table 2.14.1. The criteria in Table 2.14.6 are human health criteria and these pollutants do not have current USEPA human health criteria but do have USEPA maximum contaminant levels. In Table 2.14.2, the cadmium criteria for aquatic life use Classes 3A-3D are updated. The revised criteria are more stringent for the acute and less stringent for the chronic criterion when compared to the existing Utah criteria. New criteria for carbaryl, a carbamate pesticide, are proposed. Utah does not currently have any numeric criteria for carbaryl. In footnotes for Table 2.14.1, the site-specific total dissolved solids criterion for Quitchupah Creek is revised to include tributaries that were inadvertently omitted when the standard was promulgated. The water quality in one of the tributaries was misidentified as being impaired because of the omission. The site-specific total dissolved solids criterion for the Sevier River from Gunnison Bend Reservoir to Clear Lake: 3,370 mg/l is corrected to Crafts Lake because Clear Lake is not on the Sevier River. In Table 2.14.2, corrections were made to the table values for the chronic ammonia criteria, fish early life stages absent, and the acute silver criteria. The table values are based on equations in the water quality standards are unchanged. In Table 2.14.6, the human health criteria were reviewed and updated as required by federal regulations. Most of the pollutants listed in this table are affected. Some pollutants and criteria are proposed to be moved to Table 2.14.1. Pollutants listed that do not have current USEPA-recommended human health criteria or existing Utah criteria are proposed to be deleted. Criteria with available updated USEPA human health criteria are updated. The new criteria, and most of the updated criteria, are more stringent than the existing criteria; but, some are less stringent. Informational footnotes were added to Tables 2.14.1 and 2.14.2 to alert the user that criteria in Table 2.14.6 also apply to the uses in these tables (nonsubstantive change).