This referral involves a rail yard that has been in operation since 1869. In 1995, EPA entered into an AOC for Removal Action with Ogden Union Railway and Depot Co, which has now been subsumed by the current owner of the site, Union Pacific Railroad Co. This time-critical removal action addressed contamination in an impoundment area of the site. In 1999, EPA entered into an AOC for Remedial Investigation/Feasibility Study with UPRR. 2 portions of the site still need remediation; the 21st Street Pond area and groundwater underlying the site. Both of these areas are contaminated with DNALPs from historic operations at the site.