Forest Oil Corporation has used the unsuccessful exploration well Kustatan Field No. 1 (“KF 1”) to conduct disposal operations. The target injection zone is in the middle Tyonek Formation (“Tyonek”) at depths below 6500’ measured depth (“MD”) and true vertical depth (“TVD”). The Tyonek Formation is a Tertiary-aged fluvial deposit consisting of fine- to medium-grained sandstones with interbedded siltstones, claystones, and coals, which tend to be laterally continuous over several miles. The sandstone layers within the injection zone range in thickness up to 100’, and have up to 27% porosity and 50 millidarcies permeability. The interbedded siltstones, claystones, and coals provide vertical confinement for injected fluids. Approximately 40% of the 1000-foot interval overlaying the injection zone consists of laterally continuous, confining lithologies. These confining lithologies also comprise approximately 20% of the middle Tyonek Formation underlying the proposed injection interval. Disposal operations in KF 1 will not impact production, as the nearest development wells are more than 2-1/2 miles away.