Okla. Admin. Code § 252:628-11-2

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

Section 252:628-11-2 - Sampling plans

(a)General. The applicant shall submit sampling plans for baseline monitoring, OPDES permit monitoring, and OPDES permit renewal monitoring for DEQ approval. Sampling plans shall consider the environmental and spatial variability of the waterbody, including limnological, hydrologic, seasonal, and temporal variation. The sampling plans shall also consider both the internal and external loading and nutrient cycling.

(b)Baseline characterization. The provisions of this Subsection shall be used to establish a baseline characterization of the IPR receiving waterbody before the IPR Source Water discharge begins.

(1)Baseline characterization sampling plan. The permittee shall submit a baseline characterization sampling plan to DEQ for review and approval. The plan shall meet the minimum requirements outlined in this Subchapter.

(2)Duration. The baseline characterization of the waterbody shall include data collected for a minimum of one (1) year. Length of monitoring plan may be adjusted by DEQ based on location and parameter.

(3)Frequency. Sampling frequency for each parameter is subject to DEQ approval and shall be identified in the sampling plan. Sampling frequency may be adjusted by DEQ based on location and parameter. Each sampling event shall occur at least once per month so that a scientifically defensible data set will be generated after one (1) year. At least ten (10) data points per monitoring site are required for a baseline data set to be considered complete.

(4)Spatial. Sampling locations for each parameter are subject to DEQ approval.

(5)Baseline waterbody monitoring list. The list of parameters monitored to establish a baseline shall be robust enough to establish a scientifically defensible baseline for all factors of concern in the receiving waterbody. The required parameters for baseline characterization are subject to DEQ approval. Additional information can be found in Subchapter 7 of this Chapter.

(6)SWS-R Waterbodies. Baseline sampling of SWS-R waterbodies shall meet the requirements of OAC 252:740-13.

(c)OPDES waterbody monitoring requirements. The provisions of this subsection shall be used to establish OPDES permit waterbody monitoring requirements.

(1)Monitoring requirements. The permittee shall submit a waterbody monitoring plan to DEQ for review and approval. The approved monitoring plan shall be part of the OPDES permit. The plan shall meet the minimum requirements outlined in this Subchapter. Monitoring shall be adequate to characterize the accumulation and concentration of conservative substances.

(2)Frequency. Sampling frequency for each parameter is subject to DEQ approval.

(3)Spatial. Sampling location for each parameter is subject to DEQ approval.

(4)OPDES waterbody monitoring list. The OPDES permit establishes waterbody monitoring requirements. The parameters subject to the routine OPDES waterbody monitoring may be a reduced list, utilizing surrogates and parameters likely to be present in discharge. Monitored parameters are subject to DEQ approval. Additional information can be found in Subchapter 7 of this Chapter.

(5)SWS-R Waterbodies. OPDES sampling of SWS-R waterbodies shall meet the requirements of OAC 252:740-13.

(d)OPDES permit renewal sampling requirements. The provisions of this subsection shall be used to establish monitoring requirements for renewal of the OPDES permit.

(1)Monitoring requirements. The permittee shall submit a sampling plan to DEQ for approval. The sampling plan shall address the sampling requirements for permit renewal and these requirements shall be included in the permit. Sampling results shall be included with the OPDES renewal application. The sampling requirements may be updated during the OPDES permit renewal process with DEQ approval.

(2)Frequency. OPDES permit renewal sampling occurs once every five years during OPDES permit renewal.

(3)Spatial. Sampling locations are subject to DEQ approval.

(4)OPDES permit renewal monitoring list. The waterbody shall be monitored for a more comprehensive list of parameters during the OPDES permit renewal cycle, occurring once every five years. The sampled parameters are subject to DEQ approval. Additional information can be found in Subchapter 7 of this Chapter.

(e)Lake and stream monitoring reports. OPDES waterbody monitoring sampling plan shall include a proposed LMR form for DEQ approval. The LMR form shall provide all relevant information. LMR forms shall be completed and submitted in accordance with Subchapter 7 of this Chapter.

Okla. Admin. Code § 252:628-11-2

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