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Shell Exploration & Production <br />FED EX Tracking # 7945 1223 1656 <br />January 15, 2013 <br />RECEIVED <br />FEB 14 3 <br />Division of Redamali0rl. <br />Mining & Safety <br />Ms. Wendy Cheung RECEIVED REcFPf -D <br />US EPA Region 8 <br />1595 Wynkoop St <br />Mail Code 8P -W -GW JAN 1 3 ,. <br />Denver, Colorado 80202 -1129 GRAND JUNG I lUlv r ,,,_.i OFFICE GRANL ., r tl.E <br />DIVISION OF LA.,.,,.,,. <br />Dear Ms. Cheung: RECLAMATION MINING & SAFETY <br />RECLAMATION MINING & SAFETY <br />SUBJECT: Cement Logs — HW8101 and OW8122 <br />UIC Permit CO32210 -0000 <br />Shell Frontier Oil & Gas Inc, Oil Shale RDD Lease (COC 69166) <br />SECTION 35, T1 S, R99W, RIO BLANCO COUNTY, COLORADO <br />Dear Ms. Cheung: <br />aol v- oaG <br />Shell Frontier Oil & Gas Inc. <br />3333 Highway 6 South Blvd. <br />Houston, TX 77082 -3101 <br />As required by Section I Part 4 Well Logging and Testing and Appendix B of UIC Permit <br />CO32210 -0000, Shell Frontier Oil & Gas Inc. ( SFOGI) is submitting cementing reports and <br />cement logs for Heater Well HW8101, and observation wells OW8122. As discussed with you <br />previously, SFOGI is conducting cement logging on drilled wells in "batches" and will be <br />submitting additional batches of cementing reports and logs as they are completed. This <br />submittal represents the 6th batch of cement logging reports for wells drilled by SFOGI at the <br />East RDD lease. In addition, well completion reports providing the well construction details will <br />be provided under separate mailing. <br />Based on the interpretation of Senior Petrophysicist Engineer, Nilesh Kadam, it is SFOGI's <br />interpretation that the cement in these wells will provide the isolation necessary to prevent <br />interaction between the production zone with the overlying saline and non - saline water - bearing <br />zones above when leaching and heating operations commence. <br />If you have any questions regarding the information in this submittal, please contact me or <br />Florentino Vuelvas at (281) 544 -7790. In addition, Nilesh Kadam can be reached by email at <br />Nilesh.Kadam@Shell.com. <br />Sincerely, <br />Jeffrey DD. Stevenson <br />Staff Environmental Engineer <br />20130115 Cement Report Submittal <br />