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auger to approximately three feet below grade, to avoid potential contact with mismarked <br /> utility lines <br /> Each day, prior to field work, the field geologist or IT site representative will conduct a <br /> tailgate safety meeting to ensure proper site safety precautions are identified and also to <br /> conform to the IT site specific Health and Safety Plan (Appendix A) <br /> The borings will be drilled by a subcontractor with a current C-57 license. All drilling will <br /> be performed using a skid mounted hydraulic impact hammer with a remote power unit <br /> Before advancing to another drill site, the downhole drilling equipment will be steam cleaned <br /> to prevent cross-contamination between boreholes All ansate generated by steam cleaning <br /> ' and will be containerized in marked 55-gallon drums, and securely stored at a documented <br /> location The hydraulic drilling method generates soil cores which will be examined, logged, <br />' and together with the concrete cores removed, will be containerized in 55-gallon drums as <br /> generated These drums will be stored with those containing equipment decontamination <br /> waters, pending future disposal. The field geologist will determine the depth of the borehole <br /> and any special procedures necessary to manage any unusual or anomalous conditions (i e., <br /> flowing sands). Boreholes are anticipated to be 30 feet in depth (below the basement floor), <br /> the maximum depth achievable utilizing the hydraulic impact hammer. <br />' 2.2 Soil Sampling <br /> Samples will be collected utilizing a split spoon sampler advanced using a hydraulic hammer <br />' The sampler will contain brass tubes for collection of undisturbed samples. The sampler and <br /> brass tubes will be decontaminated by scrubbing with a non-phosphate detergent, triple rinsing <br />' with tap water, rinsing with methanol followed by a distilled water rinse Soil samples will <br /> be collected every ten feet All vadose zone samples collected, will be submitted for <br />' laboratory analysis in order to provide a vertical hydrocarbon distribution profile <br /> Each soil sample will be promptly sealed with aluminum foil, plastic end caps and tape. The <br /> samples will then be placed in a "ziplock" bag, sealed with security tape and delivered to a <br /> DOHS certified laboratory for analysis Chain-of-Custody records will be maintained for all <br /> samples <br /> MZ/05-19-94/UST/94-0067 nbr 2-2 <br />