| Abstract |
Drake Chemical, Inc. purchased the eight acre Drake Chemical site in Lock Haven, PA, in 1962. The site includes several buildings, two lined waste water treatment lagoons, an unlined sludge lagoon and an unlined liquid lagoon. The company manufactured small batches of intermediate chemicals for producers of dyes, pharmaceuticals, cosmetics, textiles and pesticides. The herbicide Fenac was also manufactured at the plant and is a major site contaminant. In order to expedite the remediation of the leachate stream a phased approach to site clean-up has been developed. The first phase or operable unit addresses the leachate stream which originates from the unlined lagoons, passes through a culvert, and into Bald Eagle Creek. The cost-effective remedial alternative selected for this site includes: covering of the upper reach of the leachate stream with natural soils, capping with clay and grading contours of surrounding land for surface water management; partial excavation of contaminated sediments and construction of a conduit drain in the lower reach of the leachate stream; installation of a granular drain at the toe of the railroad embankment; and temporary disposal of excavated sediments in the storage facility constructed on-site. The capital costs of the recommended stream remediation alternative is estimated to be $445,311. O&M for this operable unit consist of a visual inspection of the area on a semi-annual basis for 30 years. The total O&M costs are estimated to be $9,427. |
