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6•0 Sampling and Drilling Equipment Decontamination <br /> All equipment used for drilling, well, materials and sampling <br /> soil and groundwater will be decontaminated <br /> prior All equipment used for collection of more thanone sample, <br /> I . such as bailers and spoons, <br /> each use to prevent cross will be decontaminated between <br /> Drilling contamination between samples. <br /> comm ncing equipment illing at each hole.dec°ntaminted Prior r to <br /> Equipment and well material decontamination <br /> # conducted on an impermeable surface and all decontamination <br /> will be <br /> s effluent will be contained. All surfaces of the equipment <br /> will be thoroughly rinsed with potable water. <br /> r will be placed on a drying The equipment <br /> # � decontamination water will stored in o containers certified <br /> for hazardous materials storage and disposair ed The <br /> �+ approved manner. P ed o£ in an <br /> s <br /> Sample equipment to be used for <br /> esticides and <br /> analysis will be washed in a nonphosphate detergent o� anic <br /> s i or equivalent) and rinsed with tap water, (Aequivalent) <br /> t deionized water and finally with acetone. I£ the equipmentlby <br /> i is for metals analysis, the initial rinse will be condcted <br /> with N nitric <br /> water.. acld followed by tap water and deionized <br /> 7.0 yield Equipment Calibration and Maintenance <br /> The following <br /> measuring <br /> I Remedial Investigation. quipm quipment nt maybebe used during the <br /> i 1 activity. Calibration grouped by field <br /> g 6 for each piece. Procedures and frequency are listed <br /> Soil ea- and Well Installation- Steel an <br /> . taP8• Calibration: Wane. d coated cloth <br /> ` (tater Level Measurements in Wells- <br /> �illbrbeioa: Steel manufacturer supplied temperature surveyors tape, <br /> PPlied as a correction <br /> Electrical well sounders applicable <br /> check against field conditions. <br /> Ems! surveyor's tape. steel <br /> a Qr aniC V8 ors-- <br /> j� Daily field' aClibrationFhOtousingaaibn eneectorstandardCalibration: <br /> E Groundwater pH Measurement- Digital H rat®�. <br /> $; stgnderd pH solutions of 4 7 p Calibration: <br /> daily field calibration, and 10 wia be utilized for <br /> F <br /> 6.f <br /> . .t ti <br />