Okla. Admin. Code § 252:628-11-3
Current through Vol. 42, No. 7, December 16, 2024
Section 252:628-11-3 - Data requirements(a)General. Scientific data from the waterbody shall be used as prescribed in this Section. Data shall be collected and analyzed in a manner consistent with testing procedures provided in OAC 252:740 or practices that are institutionally recognized and appropriate for the parameter of concern and documented in accordance with OAC 252:740-15-3(g). All relevant existing data available for a waterbody shall be used in the analysis, subject to the spatial, temporal, and other requirements of this Section.(b)Spatial coverage. Subject to DEQ approval, IPR monitoring sites shall include: (1) All drinking water intake structures located on the receiving waterbody. Some parameters may be sampled from a raw water tap at the water treatment plant. Other parameters shall be sampled in the receiving waterbody at a point near the intake. Intake structure sampling site requirements for individual parameters are subject to DEQ approval.(2) Any additional drinking water intake structures within five (5) miles downstream of the discharge point.(3) IPR Source Water discharge areas.(4) Beneficial Use Monitoring Program (BUMP) monitoring stations, if applicable. Waivers for individual BUMP monitoring stations may be granted at DEQ's discretion.(5) Other sites as assigned. If the receiving water does not have BUMP monitoring stations, or the BUMP monitoring stations are not adequate for IPR receiving water monitoring requirements, DEQ shall assign additional monitoring sites. Alternatively, the permittee may propose monitoring sites, subject to DEQ approval.(c)Temporal coverage. Monitoring frequency for all parameters shall address seasonal variability and critical periods, subject to DEQ approval. At a minimum, nutrients and algal biomass shall have a monitoring frequency of once every two weeks during the critical season of May through October and once per month during the remainder of the year. DEQ may increase the monitoring frequency of nutrients and algal biomass in the event of a harmful algal bloom in the receiving waterbody.(d)Additional data requirements. The following data requirements apply. (1)In-Situ. Daily diurnal 1-meter profiles shall be required for water temperature and dissolved oxygen during periods of thermal stratification and daily diurnal surface measurements shall be required during periods of complete mix. Because periods of thermal stratification may vary seasonally and can be reservoir specific, both baseline sampling and IPR receiving waterbody monitoring may be used to determine the approximate beginning date of stratification setup, or if lakes are polymictic, the multiple stratification/mixing periods that may setup during a particular season. Validation profiles shall be measured periodically during periods of complete mix.(2)Nutrients. Nutrient monitoring shall be adequate to characterize both external and internal loading and nutrient cycling.(3)Algal biomass and related products. Algal biomass monitoring and taxonomy shall be adequate to characterize algal growth and community shifts during critical periods.(e)Quality assurance. Quality of data shall be assured as outlined in OAC 252:740-15-3(g).Okla. Admin. Code § 252:628-11-3
Adopted by Oklahoma Register, Volume 35, Issue 24, September 4, 2018, eff. 9/15/2018Amended by Oklahoma Register, Volume 40, Issue 6, December 1, 2022, eff. 10/25/2022Amended by Oklahoma Register, Volume 40, Issue 24, September 1, 2023, eff. 9/15/2023