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VZ1 INC <br /> The sampler will be washed with a non-phosphate cleaner and double rinsed with water <br /> after each use This will assure that contamination Is not transferred to other excavation <br /> samples The cleaning will take place on established cleaning sites and the effluent will <br /> be contained <br /> 33 Field Identification of Contaminated Soil <br /> The field determination regarding the presence or absence of hydrocarbon contamination <br /> will be based on visual sample Inspection for the presence of staining, odor, and OVM <br /> readings The presence of odor and staining In conjunction with positive OVM readings <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 III <br /> 08220010 011 4 <br />