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Geosyntec <br /> consultants <br /> 4. INVESTIGATIVE DERIVED WASTE <br /> The soil cuttings and well casing removed from the ground as part of the well destruction activities <br /> will be stored in 55-gallon drums or bins,the soil cuttings will be sampled and profiled,temporarily <br /> stored on-site. A composite soil sample will be collected of the investigation derived waste (IDW) <br /> soil cuttings and sent to Eurofins Environment Testing Calscience Inc. for analysis of the <br /> following: <br /> • Metals by USEPA Method 6020 <br /> • TPH as gasoline and diesel by USEPA Method 8260B and 801513, respectively <br /> • VOCs by USEPA Method 8260B <br /> • PFAS by USEPA Method 5375 <br /> • Dioxins and furans by USEPA Method 8290 <br /> Decontamination fluids and purged groundwater from sampling and well development will be <br /> collected in 55-gallon drums, profiled for waste characteristics, and temporarily stored on-site. A <br /> composite water sample will be collected from the IDW water generated and sent to Eurofins <br /> Environment Testing Calscience Inc. for analysis of the following: <br /> • Metals by USEPA Method 6020 <br /> • TPH as gasoline and diesel by USEPA Method 8260B and 8015B, respectively <br /> • VOCs by USEPA Method 8260B <br /> The IDW, once characterized, will be removed from the Site a California-licensed waste hauler, <br /> and disposed of at an appropriately licensed facility in accordance with state and federal <br /> regulations. Once the IDW has been accepted for disposal by an appropriate licensed disposal <br /> facility, the Port or an authorized representative of the Port will sign the waste manifest and the <br /> IDW drums will be transported off-site by American Integrated Services of Wilmington, <br /> California, to the disposal facility. The IDW is anticipated to be nonhazardous and therefore is <br /> expected to be disposed of at the Crosby and Overton facility in Long Beach, California(for water <br /> IDW)or the Potrero Hills Landfill in Suisun, California(for soil IDW). If the soil or water profiles <br /> as hazardous, it is anticipated that it would be accepted and disposed of at the Kettleman Hills <br /> Facility in Kettleman City, California(a permitted Class I and III landfill). <br /> 5 Since the well destructions are occurring in Site 3, historical soil contamination (PFAS and dioxins and furans) <br /> require additional IDW analytical testing prior to off-site disposal. <br /> RRI 2025 Groundwater Monitoring Work Plan 16 May 2025 <br />