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should be limited based upon the minimal amount of cut /fill work needed to establish the facilities <br />areas during site development work. Regraded surfaces will be ripped to 18 inches depth to alleviate <br />excess compaction and provide a better bond between regraded overburden and replaced topsoil. <br />Once disturbed areas have been regraded and ripped, soil material salvaged and stockpiled during <br />site development will be evenly redistributed over disturbed areas. Redistributed soil will then be <br />tested to determine if amendments are necessary to ensure successful establishment of planted <br />species. Fertilizer and other appropriate amendments, if needed, will be applied after soil placement. <br />Following soil replacement work, disturbed areas associated with the ELHT will be revegetated with <br />seed mixes recommended in the BLM Resource Management Plan modified based upon site - specific <br />data obtained during the baseline vegetation survey consistent with those approved in the East RDD <br />NOI. To ensure the seed mixes are free of noxious weed species, Shell adheres to BLM Instruction <br />Memorandum No. 2006 -073 entitled 'Weed-Free Seed Use on Lands Administered by the BLM ". <br />Seed material will be certified weed -free and purchased from and blended by qualified producers and <br />dealers. <br />6.2 Subsurface Reclamation Plan <br />Upon completion of pyrolysis and recovery of liquid hydrocarbons, the pyrolyzed zone will be <br />allowed to cool naturally. Subsurface reclamation for both the East RDD Pilot and the ELHT will <br />be considered complete once the average temperature in the reservoir falls below 200 °F. Once <br />cooled, a metal bridge plug will be placed in each well just above the pyrolyzed reservoir, and the <br />wells will be cemented from the bridge plug to approximately 3 ft below the ultimate reclaimed <br />ground surface. Well casings will then be cut 3 ft or more below final ground surface; monumented <br />with a brass marker placed in the cement at the top, and covered with soil. <br />7.0 SITE SAFETY AND EMERGENCY PROCEDURES <br />Site Safety and Emergency Procedures in place for the East RDD will be utilized and incorporated <br />as those described in Section 9 off the approved NOI. <br />8.0 OTHER ISSUES <br />No surface subsidence is expected from ELHT as there will be no leaching and minimal <br />production /mass removal. <br />15 <br />