| Abstract |
The 19,700-acre Eielson Air Force Base (EAFB) site, located 26 miles southeast of Fairbanks, Alaska, is primarily a tactical air support installation. Constructed in 1944, EAFB was originally a satellite installation of Fort Wainwright. Used jointly by the Army and Air Force, the site was designated Eielson AFB in 1948. Many industrial operations were conducted at the base, which generated waste oils, contaminated fuels and sludge, and spent solvents and cleansers. The selected remedial action for the site includes in situ bioventing of BTEX contaminated soil in the vadose zone, with monitoring of soil gases; collecting floating petroleum hydrocarbons from the ground water through wells, culverts, or trenches; incinerating recovered product onsite or transporting the offsite for recycling or disposal; treating extracted ground water, as needed, using air stripping, oil-water separation, or carbon filtration, as determined during the remedial design stage; and discharging the residual water onsite; monitoring petroleum product levels; collecting BTEX-LNAPLS using vacuum extraction wells, with carbon adsorption, followed by offsite disposal of carbon residuals; treating collected liquids using an oil and water separator, air stripper, or carbon adsorption; destroying air emissions using tip flare incineration; and monitoring ground water. The estimated capital cost for the remedial action is $3,867, with an annual O&M cost of $3,375 for 5 years. |
