Okla. Admin. Code § 252:628-11-1

Current through Vol. 42, No. 7, December 16, 2024

Section 252:628-11-1 - General provisions

(a)Purpose. The rules of this provide protocols which shall be used to monitor ambient water quality in sources for Public Water Supply (PWS) systems being augmented with IPR Source Water. The goals of the waterbody monitoring are as follows:

(1) To protect public health and the environment by monitoring for changes in the receiving waterbody;

(2) To protect the beneficial uses of the receiving waterbody by performing trend monitoring on parameters that are evaluated in use attainment assessments; and

(3) To evaluate modeling outcomes for all waterbodies and to monitor the assimilative capacity for SWS-R waterbodies.

(b)Testing Procedures. Testing procedures for the monitoring of IPR receiving waterbodies shall be in accordance with OAC 252:740-1-4.

(c)Quantitative data. Data collected for the monitoring of IPR receiving waterbodies shall use analytical methods listed at 40 CFR Part 136 or other EPA-approved methods. Where there is no approved analytical method listed, the applicant shall fully describe the method used for DEQ review and obtain written approval prior to utilizing these data. All data submitted shall be defensible analytical data. Reporting and recordkeeping shall be in accordance with 7 of this Chapter.

(d)Measurable levels and data characterization. Measurable levels for the monitoring of IPR receiving waterbodies shall be less than or equal to the MQLs established in Appendix H of OAC 252:606. Where there is no established MQL, the applicant shall fully describe the method and MQL used for DEQ review and obtain approval prior to utilizing these data. Where a monitored parameter has an established MQL, DEQ shall include a provision in the permit requiring measurable levels be less than or equal to the MQL. Data shall be characterized as outlined in OAC 252:606-6-2.

(e)Agency discretion to consider additional data. An agency with jurisdiction may consider other relevant data meeting the requirements of this in addition to that required by the rules in this for any particular parameter.

(f)Parameter Groups. There are ten parameter groups, as described in this Subsection. The permittee shall monitor the waterbody for specific parameters subject to DEQ approval.

(1)In-Situ. In-situ parameters include dissolved oxygen (DO), temperature, pH, electro-conductivity (EC), and oxidation/reduction potential (ORP);

(2)Nutrients. Nutrient parameters include total nitrogen (TN), nitrite (as N), nitrate (as N), total Kjeldahl nitrogen (TKN), ammonia, total phosphorus (TP), and dissolved reactive phosphorus, also known as orthophosphorus (OP);

(3)Algal biomass and related products. Algal biomass and product parameters include chlorophyll-a, pheophyton, phytoplankton, phycocyanin, and cyanotoxins. Taxonomy and phytoplankton density are also included;

(4)Minerals. Minerals include TDS, chloride, and sulfate. Alkalinity is included in this parameter group for monitoring purposes;

(5)Metals. Metals include inorganic toxics listed in Appendix G of OAC 252:730, inorganic chemicals included in the National Primary Drinking Water Regulations, and metals included in the National Secondary Drinking Water Regulations. Hardness is included in this parameter group for monitoring purposes;

(6)Microorganisms. Microorganism parameters include E. coli, total coliform, viruses, giardia, cryptosporidium, and legionella;

(7)Toxics. Toxics include the organic toxics listed in Appendix G of OAC 252:730 and organic chemicals included in the National Primary Drinking Water Regulations;

(8)Constituents of Emerging Concern. CECs are defined in 1 of this Chapter. For monitoring purposes, CECs are sorted into functional groups represented by at least one surrogate;

(9)Other drinking water parameters. National primary drinking water regulations list maximum contaminant levels (MCLs) or action levels for disinfection byproducts, inorganic chemicals, organic chemicals, microorganisms, and radionuclides. Maximum residual disinfection levels (MRDLs) are listed for disinfectants. For monitoring purposes, the drinking water parameters are those parameters listed in the National Primary Drinking Water Regulations that are not addressed in one of the other nine parameter groups; and

(10)Total Organic Carbon. TOC is the amount of carbon found in an organic compound.

Okla. Admin. Code § 252:628-11-1

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

Amended by Oklahoma Register, Volume 40, Issue 6, December 1, 2022, eff. 10/25/2022

Amended by Oklahoma Register, Volume 40, Issue 24, September 1, 2023, eff. 9/15/2023

Amended by Oklahoma Register, Volume 41, Issue 23, August 15, 2024, eff. 9/15/2024