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INC <br /> • will be used to establish the presence of hydrocarbon contamination in soil samples from <br /> the excavation <br /> Determination of the absence of contamination in a soil sample will be based on absence <br /> of odor, absence of staining and OVM readings in the range of background values <br /> Background OVM readings will be established at the top of the excavation to a depth not <br /> greater than five feet <br /> APPENDIX II <br /> 19150011 030 5 <br />