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®1� CDIM Standard Operating Procedure ,M SOP 5.0 Equipment Decontamination ..a,...a a Rev. 0 10/23/20 • Equipment will then be sprayed with potable water. • Washed equipment will then be rinsed with potable water. • Decontaminated downhole equipment (such as drill pipe, drive casing, bits, tools, bailers, etc.) will be placed on clean plastic sheeting to prevent contact with contaminated soil and allowed to air dry. If equipment is not used immediately, it may be covered or wrapped in plastic sheeting or bags to minimize airborne contamination. • Decontamination activities will be documented by the Site Superintendent, lead geologist, or lead engineer on the FAL and/or appropriate form(s), as specified in the project work plans. 10. HEAVY EQUIPMENT DECONTAMINATION Heavy equipment (e.g., drill rigs, development rigs, backhoes, and other earthmoving equipment)will be decontaminated between drilling sites or inside the contaminant reduction area prior to entering and leaving an exclusion zone. Decontamination will be performed in accordance with this SOP and the project work plans. The standard procedure will be performed as described below. • Appropriate personal protective equipment (as specified in the project work plans) will be worn by all personnel involved in the task, in order to limit personal exposure. • Equipment caked with drill cuttings, soil, or other material will be initially scraped or brushed. • Equipment will then be sprayed with potable water. • Clean equipment will then be rinsed with potable water. During the decontamination effort, fluid systems should be inspected for any leaks or problems that might potentially result in an inadvertent release at the site, thereby contributing to the volume of waste or contamination. Any identified problems should be immediately repaired and documented on the FADL. Decontamination should be completed before moving the equipment onto the site or exclusion zone. Decontamination activities will be documented by the Site Coordinator, lead geologist, or lead engineer on the FADL and/or appropriate form(s), as specified in the project work plans. Between boreholes at the same site, the back-end of the drilling rigs will be washed with potable water until surfaces are visibly free of soil buildup. 11. RECORDS Records generated as a result of this SOP will controlled and maintained electronically in the Project Records file. 5