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• Site Investigation Activities, continued • Key Findings o Location and orientation of concrete structure surveyed and mapped. o Concrete/structure covers about 600 feet by 1200 feet in surface area and • is situated about 7.5 to 8.5 feet below ground surface. o Oil stained soil detected between the 6-foot and 8-foot depth in borings positional in the center and southern sections at the concrete structure. o No free liquids were encountered in the concrete structure. • o Constituents detected in oil stained soil samples were characteristic of crude oil product. o No volatile organic constituents were detected. o No analytical or research evidence to suggest the fuel oil reservoir was utilized for the storage or disposal of any other product or waste material. • o No groundwater contamination has been detected. Conclusions o No evidence to suggest any land uses other than fuel oil storage and • agriculture. o Fuel oil draining (1940s) and the fire (1953) significantly reduced the fuel oil volume to solidified and non-volatile residues. o Approximately 30 years of successful agricultural activities have indicated no evidence of environmental problems at the ground surface. • o Nearing completion of the groundwater monitoring program, evidence indicates the fuel oil residue pose no threat to groundwater quality. o The concrete structure presents a physical obstacle to certain subsurface construction activities. o The only recognized hazard to human health is through direct ingestion of • large quantities of the fuel oil residues. o Due to the depth of the residues and the likelihood of direct ingestion it can be concluded that there exists no hazard to human health and safety. • • •