Project Name: Porter Draw, Cheyenne, Wyoming

Date Project Began: June 2006

Date Project Completed: Ongoing

Project Description:  Casey Resources, Inc. (CRI) was contracted by the owner of the Porter Draw property to provide environmental consulting assistance and third party oversight with regard to a large wastewater reservoir located on the property.  This wastewater reservoir, associated with a local refinery, was constructed in 1977 and began operations in 1978.  The designed full capacity of the reservoir was 121 surface acres. Effluent discharge to the reservoir was permitted in 1981 with the listed approved discharge of approximately 475,000 gallons per day at a rate not to exceed 1.56 cubic feet per second (cfs), for the purpose of disposal by evaporation and seepage.  The refinery discontinued its lease for the reservoir site in June 2006; however, wastewater remained within the reservoir.  The refinery is currently involved in a Resource Conservation and Recovery Act (RCRA) Corrective Action which includes a Phase II RCRA Facility Investigation (RFI) and Risk Assessment. Under the corrective action, the wastewater reservoir at Porter Draw is listed as Area of Concern (AOC) 16. 

 

On behalf of the property owner, CRI reviewed and commented on the refinery's proposed investigation work plan, investigation reports, and remediation plans.  CRI has represented the owner in meetings with the refinery, the refinery's consultant, and the Wyoming Department of Environmental Quality (WDEQ).  CRI is currently completing limited oversight for the property owner during the remediation of the wastewater reservoir, including review of soil confirmation and groundwater sampling results.

Type of Contamination:  Petroleum compounds, metals, and salts.