Section 35-11-1613 - Remediation requirements for nonvoluntary sites(a) The remediation requirements for sites that do not participate in the voluntary remediation program in W.S. 35-11-1601 through 35-11-1612 may include, in the discretion of the director requirements which: (i) Return contaminated soil and water to background contaminant levels; (ii) Return contaminated soil to contaminant levels that are safe for any potential future use of the site; (iii) Return contaminated groundwater to contaminant levels that ensure that the class of use of groundwater prior to the release is restored, or if not technically practicable, employs the best available groundwater remediation technology. No liability release shall be provided to the owner until the owner demonstrates that groundwater standards have been met; (iv) Remove all continuing sources of soil or water contamination; and (v) Eliminate to the extent practical any continuing risk to any ecological receptor present at or near the site.