S.D. Admin. R. 74:27:19:06
Monitoring is required at all monitoring wells installed in conformance with § 74:27:19:03. The owner or operator shall measure static groundwater elevation at each monitoring well to within 0.01 foot before each sampling event. Sampling procedures must comply with § 74:54:01:06 except that field filtering is not allowed.
The owner or operator shall notify the secretary within 14 calendar days after monitoring detects a statistically significant increase over ambient groundwater levels. If the owner or operator demonstrates according to 40 C.F.R. Part 258, as published on 56 Fed. Reg. 51,022 to 51,028, inclusive (October 9, 1991) that a source other than the facility caused the contamination, detection monitoring may continue. If the owner or operator cannot demonstrate that a source other than the facility caused the contamination, the owner or operator shall initiate an assessment monitoring program required by chapter 74:27:20 within 90 days.
S.D. Admin. R. 74:27:19:06
General Authority: SDCL 34A-6-1.6.
Law Implemented: SDCL 34A-6-1.6, 34A-6-1.7.