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INC <br /> and disposed of at an approved facility if necessary, with the appropriate chain-of-custody <br /> documents Within 30 days, a mitigation report will be submitted to the Department of <br /> Environmental Health Services which will include three remediation methods The report <br /> will be signed by a Registered Geologist or a Registered Civil Engineer <br /> 3.2 Soil Sampling from Excavation <br /> The soil sampling probe for a two-inch drive sampler will be used to collect undisturbed <br /> samples from the trench floor or sidewalls If possible, undisturbed samples will be <br /> obtained from the excavator bucket as appropriate <br /> Upon recovery, two sample tubes, designated A and B, will be sealed by covering with <br /> aluminum foil, capping with plastic and sealing with cloth tape This sample recovery <br /> method minimizes head space in the sample tubes The samples will then be stored on <br /> ice pending delivery to a certified laboratory for chemical analysis and accompanied by <br /> ! appropriate chain-of-custody documents Sample descriptions will include lithology, <br /> moisture content, staining and odor Samples will also be checked with an OVM <br /> Lithologic logs for each excavation will be compiled utilizing the sample descriptions <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 /> 3.3 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 /> 10 <br /> APPENDIX II <br /> 19150011030 4 <br />