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n <br /> to <br /> will be dell construction <br /> onst ed uct on=materials cwillbe drilling cl a ed each <br /> an <br /> hole. Well const=. <br /> necessary, prior to installation. <br /> Equipment and well material. decontamination will. be <br /> conducted on an impermeable surface and all decontamination <br /> effluent will be contained. A1' surfaces of steam <br /> ement <br /> m the <br /> will be thoroughly decontaminate) using in rack for air <br /> The equipment will be placed ori a dry' g <br /> ater will stored .in containers <br /> drying. The decontamination w <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 nonphosphate detergent (Alconox <br /> or equivalent) and rinsed with tap water, followed by <br /> deionized water and finally with acetone. If the equipment <br /> is for metals analysis, the initial rinse <br /> will <br /> ter abe conducted <br /> d deionized <br /> with 0.1 N ni.tric acid followed by . P <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 /> activity- Calibration procedures and frequency are listed <br /> for each piece. <br /> Soil Borings and Well Dimensions-Steel and coated cloth <br /> tape. _Calibration: none. <br /> Water Level Measurements in Wells- Steel <br /> correctors ion <br /> Calibration: manufacturer e. <br /> Supp <br /> will be applied as applicable for field conditions. <br /> Electrical well sounders. Calibration: check against steel <br /> surveyor's tape. <br /> + Organic_ V pors- Photoionization detector. Calibration: <br /> Daily field Calibration using a isobutylene standard as per <br /> manufacturers instructions. <br /> Groundwater pIi Measurement- Digital 10 w will be utilizedifor <br /> standard pH solutions of 4, 7, <br /> daily field calibration according to manufacturers <br /> instructions. <br /> Electrical Conductivity- Electrical conductivity meter. <br /> Calibration:- factory-calibratedannually <br /> and periodically <br /> prepared <br /> calibrated against laboratory <br /> ion <br /> solution. <br /> Water Temperature- Mercury or digital thermometers. <br /> Calibration: factory-calibrated once. <br />