The owner or operator required to install and operate controls established in a visibility impact analysis or BART determination must conduct periodic monitoring, recordkeeping, and reporting. All sulfur dioxide and nitrogen oxides emissions from the BART-eligible source must be routed to the main stack of a BART-eligible source. The owner or operator of a BART-eligible source must install, certify, maintain, calibrate, and operate a continuous emission monitoring system for sulfur dioxide and nitrogen oxide in accordance with 40 C.F.R. Part 75 (July 1, 2024), except the recordkeeping and reporting requirements for the continuous emission monitoring systems must be in accordance with 40 C.F.R. § 60.7 (July 1, 2024). Monitoring and related recordkeeping and reporting requirements for other air pollutants from a BART-eligible source or from a major source or modification of a major source must consist of at least the following:

1. (1) All emissions monitoring and analysis procedures, alternative approved methods, or test methods required in determining compliance with §§ 74:36:21:04 and 74:36:21:06;
2. (2) As necessary, documentation of the use, maintenance, and if appropriate, installation of monitoring equipment or methods;

3. (3) Documentation of the following:

   1. (a) The date, place, and time of sampling or measurements;
   2. (b) The date the analysis was performed;
   3. (c) The company or entity that performed the analysis;
   4. (d) The analytical techniques or methods used;
   5. (e) The results of the analysis; and
   6. (f) The operating conditions as existing at the time of sampling or measurement;

4. (4) Recordkeeping and reporting requirements that comply with the following:

   1. (a) Submission of reports of any required monitoring must occur at least every six months. Reports must clearly identify all exceedances with §§ 74:36:21:04 and 74:36:21:06. All required reports must be certified by a responsible official; and
   2. (b) Exceedances of §§ 74:36:21:04 and 74:36:21:06, including those attributable to upset conditions. The probable cause of the exceedance and any corrective actions or preventive measures taken must be promptly reported and certified by a responsible official; and
5. (5) Requirements for retention of monitoring records and all supporting documentation for at least five years from the date of the monitoring sample, measurement, report, or application.

Source: 37 SDR 111, effective December 7, 2010; 38 SDR 39, effective September 19, 2011; 39 SDR 219, effective June 25, 2013; 42 SDR 52, effective October 13, 2015; 44 SDR 43, effective September 13, 2017 ; 46 SDR 64, effective November 25, 2019; 52 SDR 27, effective September 17, 2025 .

General Authority: SDCL 34A-1-6 .

Law Implemented: SDCL 34A-1- 1 .

Prior versions effective: 2019-11-25, 2017-09-13, 2015-10-13, 2013-06-25.