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AEGON Decon SOP <br /> Downhole drilling equipment, such as augers, split spoons, Shelby tubes, and sand lines, <br /> will be decontaminated with pressurized hot water or steam wash, followed by a fresh <br /> water rinse. No additional decontamination procedures will be required if the equipment <br /> appears to be visually clean. If contamination is visible after hot water/steam cleaning, <br /> then a detergent wash solution with brushes (if necessary) will be used. Items heavily <br /> contaminated with product may require more aggressive decontamination techniques. If <br /> the items cannot be discarded, consult your EHS coordinator to obtain guidance in this <br /> regard. <br /> 6.0 Quality Assurance/Quality Control <br /> To assess the adequacy of decontamination procedures, rinsate blanks should be collected <br /> and analyzed for the same parameters as the field samples. Specific number of blanks <br /> will be defined in the project-specific sampling plan. In general, one rinsate blank will be <br /> collected per 20 samples. <br /> 7.0 Documentation <br /> Field notes describing procedures used to decontaminate equipment/personnel and for <br /> collection of the rinsate blanks will be documented by on-site personnel. Field notes will <br /> be retained in the project files. <br /> SOP Decontamination 4 of 4 <br />