Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.25 - RULES REGULATING THE IDAHO POLLUTANT DISCHARGE ELIMINATION SYSTEM PROGRAM
Section 58.01.25.304 - MONITORING AND REPORTING REQUIREMENTS

a. Requirements concerning the proper use, maintenance, and installation, when appropriate, of monitoring equipment or methods (including biological monitoring methods when appropriate); (3-24-22)

b. The type, intervals, and frequency of monitoring sufficient to yield data which are representative of the monitored activity including, when appropriate, continuous monitoring; (3-24-22)

c. Provisions for reporting the results of monitoring, including frequency, appropriate for the regulated activity based on the impact of that activity and as specified in 40 CFR Part 127 (NPDES Electronic Reporting). Reporting shall be no less frequent than specified in 40 CFR 122.44; (3-24-22)

d. The mass (or other measurement specified in the permit) for each pollutant limited in the permit; (3-24-22)

e. The volume of effluent discharged from each outfall; (3-24-22)

f. Other measurements as appropriate, including: (3-24-22)

g. According to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR Part 136 for the analysis of pollutants or pollutant parameters, or another method required under 40 CFR Part 401 through 471 or Part 501 through 503. Consistent with 40 CFR Part 136 , applicants or permittees have the option of providing matrix or sample specific minimum levels rather than the published levels. Further, where an applicant or permittee can demonstrate that, despite a good faith effort to use a method that would otherwise meet the definition of "sufficiently sensitive," the analytical results are not consistent with the QA/QC specifications for that method, then the Department may determine that the method is not performing adequately and the Department should select a different method from the remaining EPA-approved methods that is sufficiently sensitive consistent with provisions outlined in Subsections 304.01.g.i. and ii. For the purposes of this section, a method is "sufficiently sensitive" when: (3-24-22)

h. In the case of pollutants or pollutant parameters for which there are no approved methods under 40 CFR Part 136, or methods are not otherwise required under 40 CFR Part 401 through 471 or Part 501 through 503, monitoring shall be conducted according to a test procedure specified in the permit for such pollutants or pollutant parameters. (3-24-22)

a. Except as provided in Subsections 304.02.d. and 304.02.e., the Department will establish requirements to report monitoring results on a case-by-case basis with a frequency dependent on the nature and effect of the discharge, but in no case less than once a year. All results must be electronically reported in compliance with 40 CFR Part 127 . (3-24-22)

b. For sewage sludge use or disposal practices, the Department will establish requirements to monitor and report results on a case-by-case basis with a frequency dependent on the nature and effect of the sewage sludge use or disposal practice; minimally this shall be as specified in 40 CFR Part 503, Section 380 (Sewage Sludge) of these rules, and Idaho's Wastewater Rules, IDAPA 58.01.16.650, "Wastewater Rules," (where applicable), but in no case less than once a year. All results must be electronically reported in compliance with 40 CFR Part 127 . (3-24-22)

c. The Department will establish requirements to report monitoring results for storm water discharges associated with industrial activity which are subject to an effluent limitation guideline on a case-by-case basis with a frequency dependent on the nature and effect of the discharge, but in no case less than once a year. (3-24-22)

d. The Department will establish requirements to report monitoring results for storm water discharges associated with industrial activity, other than those addressed in Subsection 304.02.c., on a case-by-case basis with a frequency dependent on the nature and effect of the discharge. At a minimum, a permit for such a discharge must require the discharger to: (3-24-22)

e. A permit that does not require monitoring results reports at least annually must require the permittee to report, at least annually, all instances of noncompliance not reported under Subsection 300.12. (3-24-22)