Iowa Admin. Code r. 567-63.3

Current through Register Vol. 47, No. 8, October 30, 2024

Rule 567-63.3 - Minimum self-monitoring requirements in permits

(1)Monitoring by organic waste dischargers. The minimum self-monitoring requirements to be incorporated in operation permits for facilities discharging organic wastes shall be the appropriate requirements in Tables I and II. Additional monitoring may be specified in the operation permit based on a case-by-case evaluation of the impact of the discharge on the receiving stream, toxic or deleterious effects of wastewaters, industrial contribution to the system, complexity of the treatment process, history of noncompliance or any other factor which requires strict operational control to meet the effluent limitations of the permit, as described in the Supporting Document for Permit Monitoring Frequency Determination, March 2022, located on the department's website.

(2)Monitoring by inorganic waste dischargers. The self-monitoring requirements to be incorporated in the operation permit for facilities discharging inorganic wastes shall be determined on a case-by-case evaluation of the impact of the discharge on the receiving stream, toxic or deleterious effects of wastewaters, complexity of the treatment process, history of noncompliance or any other factor which requires strict control to meet the effluent limitations of the permit, as described in the Supporting Document for Permit Monitoring Frequency Determination, March 2022, located on the department's website.

(3)Monitoring of significant industrial users of publicly owned treatment works. Monitoring for significant industrial users as defined in 567-60.2 (455B) shall be determined as described in the Supporting Document for Permit Monitoring Frequency Determination, March 2022, located on the department's website. Results of such monitoring shall be submitted to the department in accordance with the reporting requirements in the operation permit. The monitoring program of a publicly owned treatment works with a pretreatment program approved by the department may be used in lieu of the supporting document.

(4)Operational performance monitoring. Operational performance monitoring for treatment unit process control shall be conducted to ensure that the facility is properly operated in accordance with its design. The results of any operational performance monitoring need not be reported to the department, but shall be maintained in accordance with rule 567-63.2 (455B). Additional operational performance monitoring may be specified in the operation permit based on a case-by-case evaluation of the impact of the discharge on the receiving stream, toxic or deleterious effects of wastewaters, complexity of the treatment process, history of noncompliance or any other factor that requires strict control to meet the effluent limitations of the permit. The results of operational performance monitoring specified in the operation permit shall be submitted to the department in accordance with the reporting requirements in the operation permit.

(5)Modification of minimum monitoring requirements. Monitoring requirements may be modified or reduced at the discretion of the director when requested by the permittee. Adequate justification must be presented by the permittee that the reduced or modified requirements will accurately reflect actual wastewater characteristics and will not adversely impact the operation of the facility. Requests for modification or reduction of monitoring requirements in an existing permit are considered waiver requests and must follow the procedures in 567-paragraph 60.4(2)"b." All reductions or modifications of monitoring incorporated into an operation or NPDES permit by amendment or upon reissuance of the permit are only effective until the expiration date of that permit.

(6)Impairment monitoring. If a wastewater treatment facility is located in the watershed of an impaired water body that is listed on Iowa's most recent Section 303(d) list (as described in 40 CFR Section 130.7) , additional monitoring for parameters that are contributing to the impairment may be included in the operation or NPDES permit on a case-by-case basis.

Iowa Admin. Code r. 567-63.3

ARC 7625B, IAB 3/11/09, effective 4/15/09

Amended by IAB April 13, 2016/Volume XXXVIII, Number 21, effective 5/18/2016

Amended by IAB February 9, 2022/Volume XLIV, Number 16, effective 3/16/2022