Section 58.01.08.311 - ENHANCED TREATMENT FOR CRYPTOSPORIDIUM - LONG TERM 2 ENHANCED SURFACE WATER TREATMENT RULE 40 CFR Part 141, Subpart W, is incorporated by reference.
01.Cryptosporidium Treatment Credit for Approved Watershed Control Program. The Department will award 0.5 (zero point five) logs cryptosporidium removal credit to systems that have a Department approved Watershed Control Program. Requirements for a watershed control program are set forth in 40 CFR 141, Subpart W. Guidance on how to develop a watershed control program and obtain Department approval is provided in "Implementation Guidance for the Long Term 2 Enhanced Surface Water Treatment Rule," as referenced in Section 002.02.Assessment of Significant Changes in the Watershed. As part of the sanitary survey process set forth in Section 302, the Department, or an agent approved by the Department, will assess significant changes in the watershed of a surface water system that occurred since the PWS conducted source water monitoring. If changes in the watershed have the potential to significantly increase contamination of the source water with cryptosporidium, the Department will consult with the PWS owner on follow-up actions that may be required under 40 CFR 141, Subpart W, including, but not limited to, source water monitoring or additional treatment requirements. "Implementation Guidance for the Long Term 2 Enhanced Surface Water Treatment Rule," as referenced in Section 002, provides a description of factors that will be considered by the Department when making an assessment of changes in the watershed. These factors include, but are not limited to the following:a. New IPDES permits or changes in existing IPDES permits that involve increased loading of contaminants.b. Changes in land use patterns.c. Changes in agricultural cropping, chemical application, or irrigation practices.d. Changes in other non-point discharge source activities (such as grazing, manure application, commercial or residential development).e. Stream or riverbed modifications.f. IPDES permit violations at wastewater treatment plants or confined animal feedlot operations.g. Dramatic natural events such as floods, forest fires, earthquakes, and landslides that may transport or expose contaminants.h. Prolonged drought conditions that may warrant special preparatory measures to minimize impacts from waste accumulations that are washed into source waters when precipitation returns.i. Accidental or illegal waste discharges and spills.Idaho Admin. Code r. 58.01.08.311