Environmental Engineering and Remediation
Site Inspections and Investigations

Site Characterizations and Risk Assessments, Fuel Areas

Yuma Proving Ground (YPG), Yuma, AZ

The mission of the U.S. Army Corps of Engineers (USACE) YPG involves testing of a variety of military vehicles and aircraft. The successful completion of this mission relies heavily on consistent, timely delivery of large volumes of liquid fuel for the operation of the test vehicles and aircraft. Storage and dispensing of such large volumes of fuel inherently involves the risk of a fuel release. Because of GCE's reputation for providing a wide range of professional services, in a timely manner, GCE was contracted by the USACE address two separate fuel releases at YPG fuel facilities.

  • Kofa Firing Range. A release of fuel was discovered at Facility 3475 of the Kofa Firing Range at YPG. GCE provided geologic and hydrogeologic expertise to fully characterize the release. The data obtained during the field investigation was used by our scientists to prepare a risk assessment demonstrating that no remedial action was required at the facility. GCE used Arizona Department of Environmental Quality (ADEQ) approved contaminant transport models to demonstrate that soil contamination would not impact the underlying aquifer. Additional services provided during this project included waste characterization sampling, and management of drilling and waste hauling subcontractors.
  • Fuel Station #2. In response to a potential release of petroleum fuel at YPG Fuel Station #2 located at the YPG test center, GCE was tasked with removing and replacing the torn poly-liner from a fuel collection trench, and collection of soil samples to assess possible impact to the environment. GCE's professionals completed site work in accordance with EM-385 safety procedures, which allowed personnel to safely work in the trench containing petroleum fuel. Specific services included removal and replacement of the poly trench liner, cleaning and inspection of the concrete trench for cracks or damaged joints that could allow release of fuel to the environment; and completion of soil borings to fully characterize the site with respect to petroleum hydrocarbon contamination. Once again, data collected was used to prepare a formal risk assessment to demonstrate that the site did not pose a threat to human health and the environment.