A petroleum hydrocarbon release was discovered during a Phase II Environmental Site Assessment in 2008. Golars conducted the Initial Site Characterization (ISC) which revealed the presence of contaminants above IDEM risk levels. Leaking USTs were removed to abate the source, followed by installation of new USTs. As a part of the Corrective Action Plan (CAP), Golars conducted a pilot study to determine the feasibility of Dual Phase Extraction (DPE) System to remediate soil and groundwater. 165 feet of 24"x36" trench was excavated for the installation of approximately 240 feet of DPE system conveyance lines and 55 feet of sewer line. Three extraction wells were connected to the DPE system for remediation of groundwater. Since March 2012, Approximately 102,634 gallons of groundwater were treated and 73.74 pounds of Volatile Organic Compounds (VOCs) were removed. The DPE remediation system has successfully lowered contaminant levels by over 90% since its startup. The remediation was successful because Golars designed an appropriate system, conducted diligent operations and maintenance (O&M), and conducted a System Effectiveness Evaluation, to optimize system performance.
Golars helped the owner secure an alternate source of funding for cleanup. Project success was achieved through regular meetings with IDEM regulators and aggressive reduction of contamination levels with site-specific corrective action strategy.