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will be decontaminated prior to commencing drilling at each <br /> hole. Well construction <br /> onst tallation <br /> uc materials will be cleaned as <br /> necessary, <br /> ion will be <br /> Equipment <br /> on and <br /> imPermeablematerisurfaceal oandmalltdecontamination <br /> cOf <br /> effluent will b hcontained. <br /> ondecontaminated uusings a steam the equipment <br /> will be thoroughly laced on a drying rack for air <br /> The equipment will be p <br /> drying. The decontamination water will stored in containers <br /> certified for hazardous materials storage and disposed of in <br /> an approved manner. <br /> Sample equipment to be used for pesticides and organic <br /> analysis will be washed in a sp wadter r followed n <br /> ox <br /> with tagp by <br /> or equivalent) and rinsed with <br /> deionized water and <br /> finally initialerinse will tone. if tbe conducted <br /> is for metals analysis, tap water and deionized <br /> with 0.1 N nitric acid followed by <br /> water. <br /> 7,0 Field Equipment Calibration and Maintenance <br /> The following measuring equipment may be used d during ithe <br /> Remedial Investigation. Equipment is group <br /> activity. Calibration procedures and frequency are listed <br /> for each piece. <br /> Soil &orin s and Well Dimensions-Steel and coated cloth <br /> tape, Calibration: none. <br /> Water Level Measurements in Wells- Steel surveyors tape. <br /> Calibration: manufacturer supe <br /> lied temperature correction <br /> will be applied as applicable for field conditions. <br /> Electrical well sounders. Calibration: check against steel <br /> surveyor's tape. <br /> Orbic vapors- Photo using tion detelene.standard calibration: <br /> Daily field Calibration using a isobuty <br /> manufacturers instructions. <br /> PH mete <br /> Groundwater olutions e 4, 7, and 110 will be utilizedfor <br /> standard p manufacturers <br /> daily field calibration according to <br /> instructions. <br /> Electrical Conductivit - Electrical conductivity meter. <br /> li— bration=factory-calibrated annually and periodically <br /> Ca <br /> calibrated against laboratory prepared standard calibration <br /> solution. <br /> Water Tem erature- Mercury or digital thermometers_ <br /> Calibration: factory-calibrated once. <br />