REMEDY OPTIMIZATION AND COST CONTROL FOR REMEDIAL DESIGN AND REMEDIAL ACTION AT THE ACME SOLVENTS NPL SITE

摘要

NES serves as the technical manager for the Acme Solvents site located south of Rockford, Illinois. The remedy selected for the site includes installation of an alternate water supply, groundwater extraction and treatment system, Low Temperature Thermal Stripping, SVE system, BVE system, off-site disposal of underground tanks and contents, and construction of a RCRA Cap. This paper presents the measures utilized to optimize the remedy during the RD/RA phase of the response action. The Acme Solvents PRPs realized savings of approximately $ 1.7 million during LTTS when NES identified a lower-cost alternative LTTS technology. Hydrogeologic conditions encountered during installation of the groundwater extraction system would have resulted in significant increase in costs if installed as originally designed. NES identified an alternative system with the design engineer and obtained approval from EPA Region V for design modifications which met the intent of the ROD and maintained project cost within the established budget. The ROD proposed a bedrock vapor extraction system tha was shown to be unnecessary, saving the PRPs over $1.5 to $2 million. NES submitted a request to the agency to exempt LTTS-treated soil from RCRA regulations with the intent of eliminating construction of the RCRA cap element of the remedy. This action presents a potential cost savings of $200,000.