Terracon was retained by the Western Area Power Administration, care of TOR Engineering, to develop several work plans to address historical total petroleum hydrocarbon (TPH) and polychlorinated biphenyl's (PCBs) contamination resulting from past site operations. The Basic Substation parcels were developed in the 1940s to provide power to the BMI Industrial Complex and as a transformer maintenance facility. The investigation encompassed three parcels totaling 13.1 acres. As part of the investigation phase, Terracon completed more than 180 soil borings and installed five groundwater monitoring wells to delineate the extent of soil contamination and determine groundwater quality beneath the site. Terracon developed two separate remedial action excavation work plans to remediate the extent of soil contamination. Terracon implemented and oversaw the remediation phases which commenced in 2008 and again in 2010. Additionally, Terracon conducted a geophysical survey on the eastern-most parcel to locate an area suspected of containing buried drums. Based on the findings, Terracon developed a suspected drum burial area investigation and excavation work plan, which were approved by the NDEP. Excavation activities are anticipated to start in 2011.