Violation Of Water Quality Standards

01. Discharges Which Result in Water Quality Standards Violation. No pollutant shall be discharged from a single source or in combination with pollutants discharged from other sources in concentrations or in a manner that: (3-31-22) a. Will or can be expected to result in violation of the water quality standards applicable to the receiving water body or downstream waters; or (3-31-22) b. Will injure designated or existing beneficial uses; or (3-31-22) c. Is not authorized by the appropriate authorizing agency for those discharges that require authorization. (3-31-22) 02. Short Term Activity Exemption. The Department or the Board can authorize, with whatever conditions deemed necessary, short term activities even though such activities can result in a violation of these rules; (3-31-22) a. No activity can be authorized by the provisions of Subsection 080.02 unless: (3-31-22) i. The activity is essential to the protection or promotion of public interest; (3-31-22) ii. No permanent or long term injury of beneficial uses is likely as a result of the activity. (3-31-22) b. Activities eligible for authorization by Subsection 080.02 include, but are not limited to: (3-31-22) i. Wastewater treatment facility maintenance; (3-31-22) ii. Fish eradication projects; (3-31-22) iii. Mosquito abatement projects; (3-31-22) iv. Algae and weed control projects; (3-31-22) v. Dredge and fill activities; (3-31-22) vi. Maintenance of existing structures; (3-31-22) IDAHO ADMINISTRATIVE CODE IDAPA 58.01.02 Department of Environmental Quality Water Quality Standards Section 090 Page 28 vii. Limited road and trail reconstruction; (3-31-22) viii. Soil stabilization measures; (3-31-22) ix. Habitat enhancement structures; and (3-31-22) x. Activities which result in overall enhancement or maintenance of beneficial uses. (3-31-22) 03. Temperature Exemption. Exceeding the temperature criteria in Section 250 will not be considered a water quality standard violation when the air temperature of a given day exceeds the ninetieth percentile of a yearly series of the maximum weekly maximum air temperature (MWMT) calculated over the historic record measured at the nearest weather reporting station. (3-31-22) 081. -- 089. (RESERVED)