Wyo. Stat. § 35-11-1606 (2026)

(a) The preliminary remediation agreement shall contain
the terms and conditions agreed to by the parties, which shall
include the information and procedures required for completion
of an environmental assessment or site characterization that is
adequate and appropriate to support selection of a permanent or
long term protective remedy for the site and adjacent property
to meet the standards in W.S. 35-11-1605, and a work plan,
schedule and statement of any criteria the department intends to
use to evaluate work plans and reports.

     (b) For any site that is determined by the director to
have the potential for significant contamination, be located in
an area where human exposures to contaminants are likely, or
require evaluation of remedial alternatives as a condition for
the state to maintain primacy in any federal program, the
director shall require the site characterization plan within the
preliminary remediation agreement under this section to include
a description of alternative remedial actions to be evaluated
and a plan for the collection of any data and site information
needed to evaluate those alternative remedial actions. Not all
potential remedies must be evaluated for a site. The director
and the owner may enter into a single agreement containing both
characterization and alternative remedial action evaluation
plans, or may enter into an alternative remedial action
evaluation agreement following completion of site
characterization.