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i <br /> 20 SITE INVESTIGATIONS <br /> A field investigation was performed during the week of February 2, 2004 The field <br /> investigation was performed under permits gianted by PHS-EMD A PHS-EHD representative <br /> was present during field activities The following sections describe the investigation actiNities <br /> Also described are permitting and underground utility clearance activities performed prior to <br /> peifonnrng the field investigation Figures 3 and 4 show the field investigation boring locations <br /> 21 Pernuttmg <br /> Two pernits weie obtained from the PHS-EHD for environmental borings Appendix B <br /> contains copies of the permits <br /> 22 Undergi ound Utility Clearance <br /> As required by federal law, Underground Service Alert (USA) was notified 72-hours pnoi to <br /> field work Boring locations were marked in white paint to allow USA participants to identify <br /> known utilities in the boring areas In addition an underground utility location contractoi was <br /> used to locate subsurface features in boring areas <br /> 2.3 Project Health and Safety <br /> A project-specific health and safety plan was prepared for the investigation actin ities at the Site <br /> (Versar 20013) The plan was reviewed by Veisai field peisonnel, pertinent LANG staff and <br /> subcontractoi staff in a tailgate safety meeting pnoi to the start of field actr,ities <br /> 24 Decontanunation Procedui es <br /> Down-hole equipment including rods, bits, and sampling equipment that were reused were <br /> thoroughly cleaned before and after the coring of each borehole Equipment was cleaned with <br /> water and laboiatoiy grade, non-phosphate surfactant, and double rinsed Wastewater generated <br /> during this process v<as stored on Site in appropriate containers pending disposal Soil samples <br /> were collected in new butyrate liners within a split-spoon sarripler Clean, disposable gloves <br /> weie A orn by all field personnel when handling equipment and samples <br /> 2.5 Investigation Derived Waste <br /> Waste material was collected and stored in steel, 55-gallon druins at the Site Each waste stream <br /> was segregated and stored separately Drams were labeled with the date and type of <br /> accumulated IDW, and stored in a designated area at the Site until the waste material is <br /> sufficrentl) piofiled to facilitate disposal <br /> 104700 4766 230/08SEPT2004 5 <br />