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to <br /> will be decontaminated construction prior mate ials twig will be drilling ce n d each <br /> hole. Well const <br /> necessary, prior to installation. <br /> Equipment and well material decontamination will be <br /> conducted on an impermeable <br /> surface Allsurf surfaces alldecontamination <br /> ethetequipment <br /> effluent will be .o� a steam cleaner. <br /> will be thoroughly decontaminated using in rack for air <br /> The equipment will be. placed on a dry g <br /> drying. The decontamination water will stored in containers <br /> certified for hazardous materials storage and disposed of in <br /> an approved manner. <br /> be used far pesticides and organic <br /> Sample equipment to <br /> analysis will be washed in a nonphosphate detergent (Al d nby <br /> or equivalent) and rinsed with tap water, equipment <br /> deionized water and finally with acetone. wilIf the <br /> be conducted <br /> is for metals analysis, the initial rinse <br /> with <br /> deionized <br /> with 0.1 N nitric acid followed by tap <br /> water. <br /> 7.0 Field Equipment Calibration and Maintenance <br /> The following measuring equipment may be used during the <br /> Remedial Investigation. Equipment is grouped by field <br /> ures and frequency are listed <br /> activity. Calibration proced <br /> for each piece. <br /> Soil Borin s and Well Dimensions <br /> and coated cloth <br /> tape. Calibration: none. <br /> Steel surveyors tape. <br /> Water Level Measurements in Wells temperature correction <br /> Calibration: manufacturer supe <br /> led will be applied as applicable for field conditions. <br /> Electrical well sounders. Calibration: check against steel <br /> surveyor's tape. <br /> V�xs_ Photoionization detector. Calibration: <br /> Organic <br /> Daily' field Calibration using a isobutylene standard as per <br /> manufacturers instructions. <br /> Groundwater pH Measurement- Digital pH meter. Calibration: <br /> standard pH solutions of A, 7, and 10 will be utilized for <br /> daily <br /> field calibration according to manufacturers <br /> instructions. <br /> Electrical conductivity meter. <br /> Electrical Canductivit - y periodically <br /> Calibration: factory-calibrate lstandard calibration <br /> calibrated against laboratoryPrepared <br /> solution. <br /> Water Temp - <br /> erature- Mercury or digital thermometers. <br /> Calibration: factory-calibrated once. <br />