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Investigation-Derived Waste Management Standard Operating Procedure SWE-FSOP-802;Revision 0 Ahtna Southwest Environmental Operations • Heavy equipment forklift or vehicle with drum grappler(as necessary) • Photoionization detector (PID) • Vendor-supplied roll-off bin(s), with liners if applicable • Laboratory-supplied sample containers • Wood pallets (as necessary) • Non-porous (e.g., stainless steel)trowels • Field notebook/notepad and waterproof permanent marking pens • Waste manifests • Secondary containment materials (i.e., spill containment platform/pallet with drain, absorbent pads) 4.0 Procedures The procedures below are provided for managing non-liquid and liquid IDW generated during field activities. 4.1 IDW Staging Area Identify an onsite area for staging drums, bins, and other storage containers.The area should be large enough to allow temporary storage and safe access to the drums and bins of IDW. If IDW is left onsite without supervision,then the area must be secured from unauthorized access and containers labeled appropriately. Hazardous IDW may not be accumulated for more than 90 days. 4.2 Soil IDW Place IDW (soil cuttings/spoils generated during drilling, trenching, soil sampling, or other) into DOT- rated 55-gallon drums, appropriately-sized containers/bins, or stockpiles at the point of generation. In most cases, mixing the cuttings from several borings or sampling locations is permissible to fill the containers or entire stockpiles but must be confirmed in advance by the PL/FTL. Ask the FTL whether potentially hazardous solids should be segregated from non-hazardous. When drums or containers are full or daily activities are completed,the drum lids and rings will be fastened. Full drums or containers will be transported to the designated IDW accumulation area regularly to avoid the accumulation of drums or containers at investigation sites for extended periods. Waste profiling analyses will be performed before disposal (Section 4.5). Each project may have unique waste profiling, storage, and disposal—review project-specific work plans and coordinate activities between the PL and client. Unless approved, hazardous soil cuttings and excavation spoils must not be used to fill boreholes,test pits, or excavations. Place soil cuttings/spoils on plastic sheets or containerize them when generated; dispose of the plastic sheets with the used PPE or soil cuttings. 4.3 Liquid IDW Contain liquids in DOT-rated drums or appropriately-sized watertight containers at the point of generation. Mixing the water from several sampling locations, decontamination water, process water, Page 6 of 12