St. Cloud, Minnesota
As a subcontractor to Anderson, Landmark helped a St. Cloud Federal facility with environmental issues after a disposal area was discovered during construction of a geothermal well field. Landmark and Anderson prepared a Phase I Environmental Assessment and conducted Phase II investigation activities to evaluate response action alternatives and develop remediation cost estimates. The debris area consisted of 17,000 cubic yards of demolition debris, boiler slag, asbestos material and contaminated soil, which was delineated by excavating test pits and advancing soil borings. The Phase II Investigation determined that groundwater impacts were minimal, and no elevated volatile organic compounds in soil vapor were detected within the disposal area, which consisted mostly of demolition debris and boiler slag.
Landmark and Anderson prepared a Response Action Plan and Contingency Plan, and the selected remedy is to excavate, segregate and properly dispose of the 17,000 cubic yards of waste and restore the site for installation of additional geothermal wells.