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8 December 1991 <br /> (GecAudit CV55-59E2-1.32) <br /> Page 2 of 3 <br /> immovable pipes and electrical equipment. This severely limits <br /> accon the <br /> ess for drilling equipment. There <br /> is sufficien¢rtablesdrilling <br /> north side of the vault to accomandtewe heli vet that two shallow <br /> rig (such as a Soilmaster 50) , could be drilled from this access <br /> borings, angled at 20-25 dil be s, upon tha <br /> so as to penetrate the soil beneath the vault. Depending we will <br /> results of laboratory analysis of selected sQ� l or propose <br /> either proceed to an environmental risk appraisal <br /> additional drilling. <br /> PROPOSED ASSESSMENT <br /> A detailed list of the proposed work steps is given below: <br /> 1) Prepare a site health and safety plan in accordance with the <br /> ous <br /> Occupational Safety es HPreparedlby Nat Manual <br /> al institutefor <br /> Waste ante Activities <br /> Occupational Safety and Health, Occupata.onal Safety and Health <br /> Administration, U.S. Coast Guard and US <br /> Environmental Protection Agency, October 1985. <br /> 2) Notify the EHD 48 hours prior 4o commencement of any work. <br /> 3) Drill 2 borings at an angle of approximately 20 degrees frig. rom <br /> vertical utilizing a hollow-stem auger drill Site Plan. <br /> he <br /> estimated boring location is depicted on Figure ected t be 30 <br /> The termination depth of the borings is pro7 <br /> feet at angled depth. <br /> 4) Obtain discrete soil samplss at tetl=faot;;';inte vausing a <br /> brraa <br /> split-spoon sampler loaded with three pre cleaned ss tubes. <br /> 5) Preserve soil samples in the lead <br /> brass nd sealing coverwith ing <br /> ends with::alum riuits::sn 11.-1 capping <br /> 6) Label and log soil samples on a chain of custody form. <br /> 7) store the samples under ice and transport the samples in a <br /> ch.illed container to a State certified laboratory for <br /> analysis. <br /> g) Aga 3. a :the samples ..;from each boring for total petroleum <br /> -- - - --- <br /> hydrocarbons (TPH-D) and for STE&X in accordance with EPA <br /> - - --------- <br /> methods E3015m and 6029, respectively.- <br /> methods <br /> g) Decontaminate sampling equipment in a tri-sodium phosphate <br /> solution (TSP) and rinse twice with water prior to each <br /> sampling run. <br />