After two years of monitoring, DEQ may reduce the monitoring frequencies on a case-by-case basis for parameters in this Subchapter if the applicant demonstrates that effluent limitations are being met and that public health will be protected. In no case shall the frequency of monitoring for parameters be reduced below the following frequencies:

1. (1) Disinfection Byproducts, Metals and Inorganics, Organics: Monthly;
2. (2) Nutrients: Twice a month during the period of May through October and monthly during the period of November through April;
3. (3) Pesticides: Quarterly;
4. (4) CECs: Annually;
5. (5) TDS, chloride, and sulfate: Quarterly; and
6. (6) Radionuclides: No monitoring frequency reduction.

Added at 35 Ok Reg 1311, eff 9-15-18