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Ozone Infection Points Since the ozone injection points (OIPs) daylight in one location (in a vault adjacent to the former ozone injection system location) and are not accessible for removal, these points will be pressure grouted in-place. Pressure grouting will be performed by fitting each pipe with a pressure collar and applying neat cement grout comprised of approximately 5 gallons of water per 47 pound bag of neat cement under a pressure of approximately 25 pounds per square inch (psi). A single- screw rotary pump that is capable of maintaining 25 psi of pressure will be used to emplace the grout. Once pressure grouting is complete, each of the exposed ends of the pipes will be cut below grade, capped and covered with neat cement grout within the manifold vault. The remaining void space within the well box will be filled with sand to within 0.5 foot of ground surface, and the uppermost 0.5 foot of void space will be filled with concrete, which will be finished flush with and dyed to match the surrounding ground surface. Investisation-Derived Waste Soil cuttings and decontamination water generated during well abandonment will be handled and managed as investigation-derived waste (IDW), and stored in Department of Transportation- approved 55-gallon drums (water) or placed in a lined roll-off bin (soil). The drums and bin will be appropriately labeled and secured within the PG&E Service Center yard Parsons will collect one composite soil sample from four locations within the soil bin, which will be analyzed for disposal characterization by a California-certified environmental laboratory for the following constituents: • Total petroleum hydrocarbons as gasoline, diesel, and motor oil (TPHg, TPHd, and TPHmo)by United States Environmental Protection Agency(USEPA)Method 8015M • Volatile Organic Compounds(VOCs) by USEPA Method 8260B • Polycyclic Aromatic Hydrocarbons (PAHs)by USEPA Method 8270-SIM • Title 22 Metals by USEPA Method 6010B/7471A Once characterized, all IDW will be disposed of according to local, state, or federal laws. IDW water will be removed from the Site as part of the Service Center's standard "milk runs" for waste management within 90 days of generation. The soil bin will be removed within 90 days of generation following receipt of characterization sample analytical results and generation of a soil waste disposal profile. Records of well abandonment activities will be documented in the field logbook and will include well location, method of decommissioning, total well depth, well diameter, diameter of over- drilled borehole, depth to water, grout composition, volume of emplaced grout, and configuration of casing removed. Well abandonment will be conducted in accordance with all applicable state and county requirements, including DWR Bulletin 74-90 (DWR, 1990),which is a supplement to DWR Bulletin 74-81, Water Well Standards, State of California, December 1981. Work will 6