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SIUUCI• <br />SIM I !HI <br />UC <br />SO <br />October 27, 2011 <br />Mr. Travis Marshall <br />Colorado Division of Reclamation Mining & Safety <br />101 South 3` Street, Suite 301 <br />Grand Junction, Colorado 81501 <br />Mr. Kent Walter, Manager <br />White River Field Office <br />US Bureau of Land Management <br />220 East Market Street <br />Meeker, CO 81641 <br />1 <br />RE: Modification 06 of DRMS Notice of Intent No. P- 2008 -046 and <br />Amendment of Plan of Development BLM Oil Shale Lease COC69169 <br />Dear Mr. Marshall and Mr, Walter. <br />American Shale Oil, LLC (AMSO) is requesting your approval of the enclosed Modification 06 of DBMS <br />Notice of Intent to Conduct Prospecting Operations (NOI) No. P-2008-046 and Amendment of the Plan <br />of Development for BLM Oil Shale Lease COC69169. The modification presents a revised plugging and <br />abandonment procedure for any drill hole or monitoring well installed in support of AMSO oil shale <br />RD &D project where well logging or other information indicates that the top of cement placed within the <br />annulus outside the Iongstring casing is below the ground surface. As we demonstrated in our meeting on <br />October 7, 2011, and in the report prepared by Mr. John McBeath (dated October 12, 2011), the cement <br />seal within each of the subject wells provides adequate isolation of the retort test interval as well as <br />between the hydrostratigraphic units encountered within the well. Where cement does not extend to the <br />ground surface, the top of cement occurs within the upper portion of the wellbore. The revised well <br />abandonment procedures are being proposed to ensure proper plugging of the wellbore above the top of <br />cement in each well. <br />If you have any questions or need additional information, please contact me at (970) 625 -2227 or <br />rday@amso.net. <br />Sincerely, <br />American Shale Oil, L.L.C. <br />Attachment <br />Roger L. Day <br />Vice President of Operations <br />American Shale Oil, LLC <br />110 East 3` Street, Suite 201 <br />P.O. Box 1470 <br />Rifle, CO 81650 <br />Phone: 970-625-4324 <br />Fax: 970 - 625 -4318 <br />- r1 04 11 <br />ECEWF <br />WO'! 0 1 2011 <br />GRAND JUisiCTlCR 4t, e D OFFICE <br />iC n + <br />a- i.:au..,F <br />RECI.AMATlCc f;T:.'::NG & SAFETY <br />p ®Ivi„ of <br />9 Bq�t <br />