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i i 1 5.2 stockpile samples TPH as gasoline, diesel and motor oil were detected in samples from ' the stockpile at concentrations of 2 . 2 mg/kg, 72 mg/kg and 1, 600 mg/kg. Cadmium, chromium, lead, zinc and nickel were detected at concentrations of 0.86 mg/kg, 60 mg/kg, 50 mg/kg, 89 mg/kg and 43 1 mg/kg. No BTE&X, PCB's or Halogenated Volatile Organics were detected in this sample. 1 6.0 CONCLUSIONS & RECOMMENDATIONS The results of this investigation indicate that an unauthorized release of hydrocarbons has occurred. Metals and petroleum hydrocarbons in excess of allowable limits were detected in the sample from beneath the waste oil tank, as well as in the soil 1 removed from the excavation. Following state guidelines, the PHS/EHD will probably require assessment of the lateral and vertical extent of contamination. 1 GeoAudit recommends that a Site Contamination Work Plan to excavate and remove the contaminated soil be submitted to the PHS/EHD. Because overexcavation will also involve remediation of the contamination, the PHS/EHD regulations also require that an Executive Summary of the remedial plan be prepared and submitted for public comment prior to proceeding. 7. 0 LIMITATIONS ' Our professional services were performed using that degree of care and skill ordinarily exercised by environmental consultants practicing in this or similar localities. The findings were mainly 1 based upon analytical results provided by an independent laboratory. Evaluations of the geologic conditions at the site have been made from a limited number of available data points (i.e. soil 1 samples) , and subsurface conditions may vary away from these data points. No other warranty, expressed or implied, is made as to the professional recommendations contained in this report. 1 1 3 i