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JACOBS5 Well Decommissioning Work Plan adjacent to South Center Street. The work at this location will be performed under an approved City of Stockton Encroachment Permit. 3.2 Equipment Decontamination Drilling equipment will be decontaminated prior to and between well locations, before and after work. Decontamination procedures will include, at a minimum, dry brushing to physically remove soil, washing the equipment with an AlconoxTM (or similar detergent)solution, and a pressurized rinse with potable water. Decontamination fluids will be collected and contained in 55-gallon drums. 3.3 Waste Characterization and Management The materials generated from drilling activities will be managed as hazardous waste (pending analysis) and recycled where available. The waste material will be transported and disposed of by a licensed waste transporter under a manifest at an appropriate offsite disposal facility. Drill cuttings generated from over- drilling will be collected and contained in 55-gallon drums or lined and covered bins. Displaced groundwater and decontamination fluids will be collected and contained in 55-gallon drums. Metal and concrete materials will be recycled if possible. Once containerized, the materials will be transported to a temporary centralized waste accumulation area for storage during characterization sampling. The drums will be placed on pallets, including secondary containment consisting of plastic beneath pallets that contain fluid-filled drums. Sandbags and/or straw wattle will be placed surrounding the plastic to create a berm and prevent fluids from reaching the ground. Waste characterization samples collected from the drill cuttings and decontamination fluids will be submitted to a California-certified laboratory, and results will be provided to PG&E for its use to establish waste profiles. Laboratory testing will include the following: • Gasoline, diesel, and motor oil range petroleum hydrocarbons measured as total petroleum hydrocarbons by United States Environmental Protection Agency (EPA) Method SW8015B • Semivolatile organic compounds by EPA Method 8270C • Volatile organic compounds by EPA Method SW8260 • Title 22 metals by EPA Method SW6010B/SW7471A/7470 • Ignitability, reactivity, and corrosivity by EPA Method SW-846 • pH by EPA Method SW9045C PG&E will be identified as the waste generator and a PG&E representative will sign the appropriate waste manifests. If necessary, a PG&E-authorized delegate will sign waste manifests on PG&E's behalf. The contractor will coordinate pickup of the waste containers at the Site. A contractor or PG&E representative will be onsite during waste removal activities. Inspections of the temporary waste accumulation area will be conducted until the waste is transported to the approved waste disposal facility. 4. Reporting DWR Form 188 Well Completion Reports for the two decommissioned wells will be prepared by the licensed C-57 driller, reviewed by Jacobs, and submitted to DWR and SJCEHD. A well decommissioning letter report will be submitted to DTSC. The letter report will contain a brief description of field activities, well decommissioning permits, waste profile data, waste manifests, and copies of the DWR Form 188 Well Completion Reports. FES0817211625BAO