Section 58.01.17.700 - PERMIT MODIFICATION01.Causes. A permit modification may be initiated by a permittee through a modification request or by the Department if one (1) or more of the following causes exist.a. Material and substantial alterations or additions to the permitted facility or activity occurred after permit issuance which justify applying permit conditions that are different or absent in the existing permit.b. Standards or regulations on which the permit was based amended by promulgation or by judicial decision after the permit was issued.c. The Department determines good cause exists for modifying a compliance schedule or terms and conditions of a permit.d. Level of discharge of any pollutant that is not limited in the permit exceeds the level that may cause an adverse impact to surface or ground waters.e. Correct technical mistakes, such as errors in calculation, or mistaken interpretations of law made in determining permit conditions.f. When a treatment technology proposed, installed, and properly operated and maintained by the permittee fails to achieve the requirements of the permit.02.Minor Modifications. Minor permit modifications may be made without issuing a draft permit or public review. Examples include:a. The correction of typographical errors or formatting changes;b. Transfer of ownership or operational control, or responsible official;c. Change in monitoring or reporting frequency requirements, or revision of a laboratory method;d. Extend the permit expiration date or change compliance due date;e. Change or add a sampling location;f. Change to a higher level of treatment without a change in end uses;g. Change in terminology;h. Removal of an allowed use;i. Correct minor technical errors, such as citations of law, and citations of construction specifications;j. Change in a contingency plan resulting in equal or more efficient responsiveness; ork. Removal of acreage from irrigation without an increase in loadings.03.Major Modifications. The procedure for major modifications is the same as for a new permit. Examples include:a. Changes in the treatment system;b. Adding an allowed use;c. Changes to a lower (less treated) class of water;d. Adding acreage used for irrigation; ore. Changes to less stringent discharge limitations.Idaho Admin. Code r. 58.01.17.700