S.D. Codified Laws § 34A-15-6.1
Notwithstanding the provisions of § 34A-15-6, a lender-owner is not liable for environmental, response, cleanup, or remediation costs at a brownfields site approved by the Department of Agriculture and Natural Resources for participation in the state brownfields revitalization and economic development program unless:
Liability pursuant to this section is limited to the cost for a response action or remediation that is directly attributable to the lender-owner's activities set forth in subdivisions (1) and (2) of this section. Liability arises only if the lender-owner's actions were the proximate cause of the release or violation. Ownership or control of the property pursuant to a security interest during or after foreclosure does not by itself result in liability. No lender-owner is liable for any response action or remediation if the response action or remediation arises solely from a release of regulated substances in excess of reportable quantities that occurred before or commences before and continues after foreclosure. However, the lender-owner is responsible for the portion of the response action or remediation that is directly attributable to the lender-owner's aggravation of a release. A release of regulated substances in excess of reportable quantities discovered in the course of conducting environmental due diligence is presumed to be a prior or continuing release on the property.
SDCL 34A-15-6.1