Risk-Based Closure – Warehouse Facility, Calbag Metals, Inc., Front Avenue, Portland, Oregon (June 2003)
Initially conducted Phase I and II ESAs then managed the removal of surface soils and asphalt, then conducted a comprehensive risk-based closure assessment of the subject site using Oregon Department of Environmental Quality RBCA Guidance Document for petroleum-contaminated sites. The assessments were conducted according to American Society for Testing and Materials (ASTM) standards and included site inspections, investigation of area geology and hydrogeology, review of site history and land use, review of adjacent property history and land use, review of regulatory agency lists and files, interviews with the property owner and authorized regulatory officials, The phase II work included onsite sampling of soil, groundwater, asbestos, PCB’s, and drummed wastes, and preparation of the ESA report. The work involved collection of 85 shallow and intermediate depth soil and media samples and 4 shallow groundwater samples with GeoProbe equipment. Creekside provided well logs, test boring logs, cross sections, and 5 AutoCAD maps depicting site contamination and investigation areas. As part of this project, several leaking UST’s were discovered and removed by Creekside and its subcontractors. The project resulted in completion of a successful risk-based closure, achieved a “No Further Action” from the DEQ and the site was subsequently sold to the selected prospective purchaser.