Liberty Gas – Frankford Avenue

A gasoline station on Frankford Avenue in Philadelphia, PA was upgrading its underground storage tank (UST) system when gasoline vapors were detected in soil. All of the work required by Pennsylvania’s Corrective Action Program (CAP) for USTs and Act 2, the site investigation and remediation, for release of liability is 100% reimbursable by USTIF.

Services in Support of Site Remediation Include:

• Soil remediation interim remedial measure (IRM)
• Site characterization
• Groundwater characterization
• Monitored Natural Attenuation (MNA) evaluation
• Groundwater recovery utilizing TWT’s submersible pumping equipment
• A Remedial Action Plan utilizing an innovative in-situ remedial approach
• Separate Phase Product (SPP) recovery
• Soil gas and indoor vapor intrusion assessment
• Aquifer testing and data analysis
• Groundwater fate and transport modeling
• Risk assessment
• TWT’s Subsurface Utility Engineering (SUE) prior to drilling
• Surveying well elevations and locations
• Communication and coordination with USTIF
• UST (Chapter 245) and Act 2 (Chapter 250) compliance

Taylor Wiseman & Taylor (TWT) completed an environmental site characterization in compliance with CAP and Act 2 regulations. After the appearance of SPP, TWT conducted multiple recovery events and implemented an innovative technology by installing a BioSok® unit, called a well boom, in the impacted groundwater monitoring well. This well boom is intended to remediate the thin layer of separate phase product remaining in the recovery well. A multi-media investigation of soil, groundwater, and soil gas was completed and TWT utilized risk assessment and pathway elimination to assess the potential risk to human health. To expedite the groundwater remediation, TWT conducted numerous groundwater recovery events from the source area. A monitored natural attenuation (MNA) study and ongoing groundwater monitoring is currently evaluating the efficacy of the remedial actions conducted. TWT facilitated communications with the Pennsylvania Department of Environmental Protection (PADEP) and obtained prompt approvals of required submittals by PADEP.