Kaiser Aluminum Fabricated Products, LLC, a division of Kaiser Aluminum Corp., operates a manufacturing facility on approximately 142 acres located at 600 Kaiser Drive in Heath, Ohio. The facility was constructed around 1942 by Alcoa and was operated by the Defense Plant Corporation of the U.S. Government Services Administration until 1949 when ownership was transferred to Permanente Metals, the forerunner of Kaiser Aluminum Corporation. Kaiser operated the facility for the casting, extrusion and fabrication of aluminum products.
Ohio EPA conducted a U.S. EPA preliminary assessment (PA) at the site in 1984 and a state-lead revised PA in 1993. Based on the recommendations of the 1993 PA, Ohio EPA conducted a field investigation at the site in 1994 that consisted of collecting relatively shallow soil samples (collected by hand auger) at various areas of potential concern around the site and sediment samples from Ramp Creek. No ground water or surface water samples were collected during the 1994 field investigation.
Ohio EPA completed a state site assessment in January 2007 that included results of a field investigation conducted during October and November 2005. Soil, ground water, surface water and sediment samples were collected and submitted for laboratory analysis as part of the 2005 field investigation. Several areas of the site were investigated with the focus on a former landfill/disposal area that accepted industrial wastes and debris generated at the site from approximately 1949 to 1979. The landfill/disposal area is located at the northeast corner of the property along the banks of Ramp Creek, a tributary of the South Fork of the Licking River. The landfill/disposal area contained a former two-cell oil disposal lagoon where, prior to 1970, oil was reportedly disposed of and periodically burned off, according to Ohio EPA files.
Soil samples collected during the 2005 field investigation contained detections of volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), polychlorinated biphenyls (PCBs), metals and total petroleum hydrocarbons (TPH). Trichloroethene, vinyl chloride, benzo(a)pyrene, PCBs and several metals were detected in soil in the vicinity of the former landfill/disposal area at concentrations above U.S. EPA Region 9 preliminary remediation goals (PRGs) for residential direct contact. TPH was also detected in exceedance of Ohio Fire Marshal, Bureau of Underground Storage Tank Regulation regulatory levels for petroleum in Class 2 soils.
Ground water contamination related to the disposal of wastes on site was detected in shallow ground water in the vicinity of the former landfill/disposal area. Chlorinated solvents, cis-1, 2-dichloroethene (cis-1, 2-DCE) and vinyl chloride, were detected above U.S. EPA primary maximum contaminated levels (MCLs) for drinking water. Several metals were also detected at concentrations above their respective MCLs or PRGs for tap water, however, the ground water samples were turbid and metal concentrations may be biased high. Ground water samples were also collected from on-site process water supply wells completed in a deeper aquifer. Results of the process water supply well sampling yielded detections of arsenic above its MCL, however, the arsenic may be naturally-occurring.
Surface water samples collected from Ramp Creek yielded detections of VOCs and metals but did not exceed state surface water criteria for these analytes. One surface water sampling location yielded detections of cis-1, 2-DCE, which was also detected in ground water at the site. Benzene and other petroleum compounds detected in surface water samples may originate from an off-site petroleum plume located on the opposite side of Ramp Creek emanating from the former Pure Oil site (aka Ramp Creek DERR Project ID # 145-000654) located northwest of the site.
Sediment samples from Ramp Creek yielded low concentrations of VOCs. SVOCs, PCBs, metals, and TPH. However, petroleum-related VOCs and SVOCs may, in part, be due to off-site sources and metals may be naturally-occurring. Non-petroleum VOCs and PCBs may be site-related.
Based on the results and conclusions of the 2007 state site assessment, Kaiser entered into an administrative consent order with Ohio EPA on June 30, 2009. The consent order specifies that Kaiser, with Ohio EPA's oversight, will conduct a remedial investigation/feasibility study (RI/FS) at the site. Upon completion of the RI/FS, Ohio EPA will prepare a preferred plan for the site for public notice and comment. The selected remedy will be detailed in a decision document issued by the Ohio EPA director. Based on the decision document, Kaiser and Ohio EPA may enter into a remedial design and remedial action administrative consent order to implement the selected remedy for the site.
Summary date: December 2009