Stillwater Technologies, Inc.

Birmingham, AlabamaStillwater was the consultant for delineation and remediation of on-site contaminated soils at a former electrical transformer maintenance facility. An initial sampling plan was prepared in accordance with guidelines outlined in the Toxic Substances Control Act (TSCA). The assessment was completed in two stages. First, horizontal and vertical soil delineation was conducted using GeoprobeŽ techniques and Field Immunoassay Analysis and laboratory confirmation. During the soil investigation over 3,500 feet of GeoprobeŽ macro-cores were collected. The cores were then logged for lithology, screened with an organic vapor analyzer, and sampled for immunoassay and/or laboratory analysis. Second, wipe and concrete samples were collected on the interior surfaces of the maintenance facility. Once the assessment efforts were complete, a remediation plan was prepared, which included excavation and disposal of impacted soils, decontamination and sealing of impacted areas inside of the facility, and placement of an engineered asphalt or soil cap. The remediation efforts were conducted in accordance with the National Contingency Plan (NCP) and the TSCA and included the excavation, transportation, and disposal of greater than 13,000 tons of soil to a TSCA approved landfill. The on-site remedial efforts were completed in various phases; soils were removed from four different areas associated with different activities from the facility, of these areas removal of approximately 2,000 tons of contaminated soils were from below the foundation of the interior of the building.