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i <br /> 26 June 1992 <br /> (GeoAudit CV 45-49C5-1. 10) <br /> Page 3 of 3 <br /> CONCLUSIONS <br /> Based upon field observations and the analytical results of the <br /> soil and water samples, hydrocarbon contamination is present in the <br /> soil below the bottom of the former tank cavity and in the <br /> groundwater. Although contaminant levels are very low in MW-1, they <br /> exceed the DHS action levels for BTE&X and TPH, and San Joaquin <br /> PHS/EHD and the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) will probably require additional wells to determine the <br /> direction of groundwater flow and the lateral extent of the <br /> contamination. We recommend that two additional wells be installed, <br /> so that the groundwater gradient can be determined and the <br /> contaminant plume can be mapped. <br /> LIMITATIONS <br /> Our professional services were performed using that degree of care <br /> and skill ordinarily exercised by environmental consultants <br /> practicing in this or similar localities. The findings were mainly <br /> based on analytical results provided by an independent laboratory. <br /> Evaluations of the geologic conditions at the site for the purpose <br /> of this investigation are made from a limited number of available <br /> data points. No other warranty, expressed or implied, is made as to <br /> the professional recommendations contained in this report. <br /> • <br /> I <br />