United Refining Company
Northwest Pennsylvania
Project Description:Kleinfelder delineated the nature and extent hydrocarbon chemicals of concern (COC) in soil and groundwater at a 10+ acre truckstop site located in the northwestern corner of Pennsylvania. Site characterization activities included the installation of 38 soil borings and 21 monitoring wells. A dual phase extraction pilot test was conducted to determine design criteria for a remedial system. Nine hundred gallons of gasoline were recovered during the 24-hour pilot test. A remedial system was designed, permitted, installed and successfully operated. The system utilized soil vapor and groundwater extraction from multiple recovery wells and employed a product recovery component, airstripper, catalytic oxidizer and carbon treatment. The site characterization, remedial action plan and baseline risk assessment were approved under the Pennsylvania Department of Environmental Protection Agency (PADEP) Act 2 (Land Recycling Program) and Corrective Actions Process (CAP). When the remedial system had reduced COC concentrations to asymptotic levels, risk-based closure standards were developed and approved by PADEP. Two years of groundwater attainment monitoring were successfully completed and regulatory closure negotiated with PADEP.
Scope of Services
Life of project including assessment, remediation, attainment demonstration and regulatory closure.
Client Issues
- United Refining Company (URC) had never before used risk-based standards to achieve regulatory closure on any of their sites.
Client Benefits
Kleinfelder helped URC to evaluate the benefits of utilizing risk-based standards for a site that will remain an active truckstop. URC was able to terminate operation of a remedial system that had completed its job and demonstrate that COC levels remaining on-site did not pose an excessive risk to human or ecological receptors.
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