Okla. Admin. Code § 252:628-11-7

Current through Vol. 41, No. 19, June 17, 2024

Section 252:628-11-7 - Developing parameter monitoring lists

(a)General. Where applicable, subsets of parameter groups may be used to meet waterbody monitoring requirements. Surrogates are not appropriate for the in-situ, nutrients, algal biomass, minerals, and TOC parameter groups. Monitoring locations, frequency, and temporal concerns are addressed elsewhere in this Subchapter. All parameter monitoring lists are subject to DEQ approval. As part of the sampling plans, the applicant shall submit parameter lists for baseline monitoring, OPDES permit monitoring, and OPDES permit renewal monitoring for DEQ approval. Parameter monitoring lists shall be adequate to meet all monitoring requirements and fulfill the purposes of the waterbody monitoring as outlined in Section 1 of this Chapter.

(b)Likely to be present in discharge. If a parameter is likely to be present in IPR discharge, that parameter or surrogate shall be monitored in the waterbody. A parameter is considered likely to be present in the discharge if there is a permit limit established for the parameter, if pilot testing has shown it is likely to be present, or if DEQ determines it is likely to be present. Other parameters with or without permit limits may be added to or removed from waterbody monitoring as determined by DEQ.

(c)Surrogates. The parameter groups of metals, toxics, CECs, and other drinking water parameters are eligible to meet waterbody monitoring requirements through surrogates. The presence and concentration levels of any surrogate must be representative of its entire parameter group. All surrogates are subject to DEQ approval.

(1)Metals. Hardness and at least one other parameter from the metals parameter group are required for water-body monitoring.

(2)Toxics. At least one organic toxic parameter is required for waterbody monitoring from each of the following categories: acid compounds, base/neutral compounds, and pesticides.

(3)Constituents of Emerging Concern. At least one surrogate shall be selected from each CEC functional group for waterbody monitoring. Functional groups, e.g., based on chemical structures as appropriate, will be determined by DEQ.

(4)Other drinking water parameters. Surrogates for waterbody monitoring may be selected for other drinking water parameters subject to DEQ approval.

(d)Waterbody monitoring lists. The applicant shall develop waterbody monitoring lists subject to DEQ approval for baseline characterization, OPDES permit monitoring, and OPDES permit renewal sampling. Additional requirements are outlined in OAC 252:628-11-2.

Okla. Admin. Code § 252:628-11-7

Adopted by Oklahoma Register, Volume 35, Issue 24, September 4, 2018, eff. 9/15/2018