| The 72-acre Sidney Landfill site is located on Richardson Hill Road, approximately 2 miles south of the Village of Sidney Center in Delaware County, New York. The Richardson Hill Road Landfill (RHRL) site is located immediately to the south of the Sidney Landfill site. The remedies at both National Priorities List (NPL) sites have been implemented by the responsible parties, Amphenol Corporation and Honeywell, Inc., which are the successors to Bendix Corporation and Allied Signal, Inc. These parties are collectively referred to as the Potentially Responsible Parties (PRP) for this report. The capture zone associated with extraction wells at the northern end of the RHRL site is considered part of the Sidney Landfill remedy. The identification of new seeps downhill to the north from the Sidney Landfill, the presence of an apparent hydraulic connection between the two landfills, as well as the persistence of groundwater and sediment contamination at the RHRL site led the EPA to request a study of optimization opportunities for the remedies at these two sites. This optimization review focuses on the groundwater components of the remedies for the two sites and considers soil and sediment contamination only as it may be related to groundwater contamination. |