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WZI INC <br /> (EPA) approved, 55 gallon barrels with lids, stored on-site pending laboratory analysis <br /> and disposed of at an approved facility d necessary, with the appropriate Chain of <br /> Custody documents Within 30 days a mitigation report will be submitted to the <br /> Department of Environmental Health Services which will include three (3) remediation <br /> methods The report will be signed by a Registered Geologist or a Registered Civil <br /> Engineer <br /> 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, fossil content, 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 /> • <br /> APPENDIX V <br /> Page 2 <br />