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ATTACHMENT Q:PLUGGING AND ABANDONMENT PLAN 2. Inject sufficient fresh water into the well to displace the wellbore fluids. Contain displaced water. 3. Check the well depth to confirm that the wellbore is open to a depth of at least 100 feet below the 5-inch hanger (approximately 3,460 feet). If not,bail the well to that depth. 4. Run open-ended 2-3/8-inch tubing with 1,200 feet of 11/4-inch to RND,EUE,N-80 tubing stinger to at least 3,460 feet,but as deep as possible down to a maximum depth of 4,567 feet. Tremie through the tubing a premium cement plug by coordinating the pumping of cement and gradual withdrawal of tubing until the tubing has been pulled up to a depth of 3,160 feet,which is 200 feet above the liner lap. It is estimated that a 280 cubic foot cement plug will be sufficient to fill the well from 4,567 to 3,160 feet. 5. Allow the cement plug to cure for at least 12 hours, or the manufacturer's recommendation. 6. Tag the top of the cement plug to confirm that it is at least 100 feet above the liner lap. If not,add additional cement and wait an additional 12 hours for it to cure. Repeat this step as necessary. 7. Pull up to a depth of 700 feet. Tremie grout a cement plug to the ground surface. As above, allow the cement plug to cure for at least 12 hours, or the manufacturer's recommendation. 8. Add additional cement and wait an additional 12 hours for it to cure. Repeat this step,as necessary,until the cement plug is within 2 feet of ground surface. 9. Remove the BOPE and move the rig off. Cut off the wellhead and casing at ground level and weld a 3/8-inch steel plate to cap off the 7-inch casing. 10. Restore to grade,with a recommended brass marker installed to identify the former well site. Cost Estimate The cost estimate to plug and abandon an injection well at the STIG-LEC facility consists of several components. These include: • Mobilization—Moving the workover/completion rig to the site and onto the well, and setting up the rig and ancillary equipment. • Packer and tubing removal and well cleaning—Removing all downhole items from the wellbore;confirming that the hole is open at the perforated interval, and bailing the well to remove sediment if it isn't;and recirculating fluid into the hole to clean it. • Installation of two cement plugs—Plugs are installed through the injection interval and in the upper potable aquifer zone. • Site restoration—Removing above-grade equipment, installing steel plate, and conducting site restoration Q-2 SAC/371322/082560023(ATTACHMENT-Q.DOC)