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,k <br /> ll 33 6.6 Decontamination Procedures <br /> Decontamination of sampling equipment must be conducted consistently as to assure the quality <br /> of samples collected. All equipment that comes into contact with potentially contaminated soil <br /> or water will be decontaminated. However, no equipment coming into contact with potentially <br /> contaminated soil or water will be re-used at a subsequent sampling point. Disposable <br /> groundwater sampling equipment intended for one-time use will not be decontaminated, but will <br /> be packaged for appropriate disposal. Dedicated sediment and wood sampling equipment shall <br /> be used. Dedicated sampling 'equipment shall not be re-used at another sampling location. <br /> However, all non-disposable sampling devices used, including trowels, knives, etc. will be <br /> steam-cleaned or decontaminated according to the following: <br /> The following, to be carried out'In sequence, is an EPA Region IX recommended procedure for <br /> the decontamination of sampling equipment: <br /> • Detergent and tap water wash, using a brush if necessary (e.g., Alconox or <br /> trisodium phosphate) <br /> • Tap-water rinse <br /> • 0.1 N nitric acid rinse <br /> • Deionized/distilled water rinse <br /> Equipment will be decontaminated in a predesignated area on pallets or plastic sheeting, and <br /> clean bulky equipment will be stored on plastic sheeting in uncontaminated areas. Cleaned small <br /> equipment will be stored in plastic bags. Materials to be stored more than a few hours will also <br /> be covered. <br /> 7.0 DISPOSAL OF RESIDUAL MATERIALS <br /> In the process of collecting environmental samples at the Weber Block site, field sampling team <br /> will generate different.types of potentially contaminated investigation-derived waste (IDW) that <br /> includes the following: <br /> • Used personal protective equipment (PPE) <br /> • Disposable sampling equipment <br /> • Decontamination fluids <br /> • Soil cuttings from soil borings <br /> • Purged groundwater and excess groundwater collected for sample container filling. <br /> I <br /> The EPA's National Contingency Plan (NCP) requires that management of IDW generated during <br /> i� sampling comply with all applicable or relevant and appropriate requirements (ARARs) to the <br /> extent practicable. The sampling plan will follow the Office of Emergency and Remedial <br /> nA362I0198SAP1websap2.wp5 WEBER BLOCK (Area 9) Sampling and Analysis Plan Q <br /> Page 15 <br />