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Equipment Decontamination Standard Operating Procedure SWE-FSOP-801;Revision 1 Ahtna Southwest Environmental Operations 4.2 Decontamination Area The decontamination area should be large enough to allow temporary storage of cleaned equipment and materials before use, as well as to stage drums and bins of IDW. In the case of large decontamination areas (for example, for hollow-stem auger decontamination), line each area with heavy-gauge plastic sheeting and include a collection system designed to capture potential liquid and solid decontamination IDW. Lay out decontamination areas in such a way as to prevent overspray while performing equipment and personnel decontamination. Smaller decontamination tasks, such as surface water and sediment sampling equipment decontamination may take place at the sampling locations. In this case, all required decontamination supplies and equipment must be mobilized to the site, and smaller decontamination areas for personnel and portable equipment provided as necessary. These locations will include basins or tubs to capture decontamination IDW, which will be transferred to larger containers as necessary. 4.3 Personnel and PPE Decontamination Personnel decontamination first involves the removal of gross contamination. Scrape and wipe contaminated solids such as mud from the outermost layer of protective clothing and boots, and remove gloves by rolling off the hands starting at the cuff in such a way that the gloves are turned inside out during removal. If necessary, don a clean pair of gloves to complete the boot cleaning process. Boots can be cleaned while being worn or following removal. Remove any remaining contamination using soapy water, brushes, or other similar means such as a pressure washer, if available. Once all debris is removed, rinse PPE with clean water. [PFAS Project]: Once all debris is removed, PPE should be rinsed with clean PFAS-free potable water. If boots are dry and not laden with gross solid materials,a brush can simply be used to knock off or remove any residual solid materials. If the boots have contacted liquid phase contaminants, it is important that the contaminants be removed using soapy water and a brush, followed by a clean water rinse. If the contaminants have adsorbed into the boots, the boots must be disposed of and a replacement pair obtained before conducting any further field activities. Following removal and cleaning of reusable PPE, field personnel should wash their hands or any exposed body parts which may have been in contact with the associated hazardous substances. Note. Disposable PPE such as gloves and suits that have no visible solids(lightly soiled)may not need to be cleaned as described above. If the PL approves, these PPE items are disposed in accordance with SWE-FSOP-802, 'IDW Management." 4.4 Sampling and Hand-Held Equipment Decontamination 4.4.1 Pre-Sampling 1. Consolidate containers and equipment for decontamination. Decontaminate new and not- previously-decontaminated equipment/material before use. If the prior use is unknown, assume the equipment/material needs to be decontaminated. Page 7 of 10