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SOP #12 <br /> Date:9/1/93 <br /> Page 20 of 31 <br /> 7.0 <br /> EQUIPMENT DECONTAMINATION <br /> Specific equipment decontamination procedures are described in the following <br /> paragraphs. Equipment decontamination will include the following: <br /> • Decontamination of CPT equipment (rods and sampling devices) will be <br /> conducted between individual sampling points to minimize potential cross- <br /> contamination. Sampling equipment will be decontaminated between each <br /> sample collected. <br /> • The CPT rig, depending on the extent of chemical occurrence and the cleaning <br /> requirements, will be decontaminated at each sampling site or at the <br /> equipment decontamination pit. <br /> 7.1 CPT EQUIPMENT DECONTAMINATION PROCEDURES <br /> The following steps will be used to decontaminate sampling equipment: <br /> • Personnel will dress in suitable safety equipment to reduce personal exposure. <br /> • All CPT devices (rods and sampling equipment) will be decontaminated in an <br /> enclosed chamber mounted beneath the CPT rig. The system contains <br /> scrubbers and spray nozzles that are supplied with pressurized hot water and <br /> detergent by a steam cleaner. Rinsate is contained inside the chamber and <br /> subsequently pumped into a 55-gallon drum for disposal. <br /> • If any equipment remains caked with soil or other material, it will be placed <br /> in a wash tub. The caked material will be scraped off with a flat-bladed <br /> scraper. The scrapings will be disposed in drums or roll-off bins. <br />