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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 Auger flights will be steam cleaned after drilling each borehole This will <br /> assure that contamination is not transferred to other boreholes The cleaning will take <br /> place on established cleaning sites and the effluent will be contained <br /> Uncontaminated boreholes (as determined by OVM filed tests) will be backfilled with the <br /> same material or cuttings extracted from the hole during drilling after placing five feet of <br /> bentonite in the bottom of the hole Boreholes found to have contaminated soil will be <br /> i <br /> backfilled with a cement and sand slurry containing no more than five percent bentonite <br /> The cuttings from these holes will be placed in U S Environmental Protection Agency <br /> (EPA) approved, 55 gallon barrels with lids, stored onsite pending laboratory analysis and <br /> 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 (3) remediation methods The <br /> report will be signed by a Registered Geologist or a Registered Civil Engineer <br /> 32 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 /> • <br /> APPENDIX III � <br /> 08220010 011 3 <br />