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FED EX Tracking # 7946 8208 3819 <br />February 6, 2013 <br />Ms. Wendy Cheung <br />US EPA Region 8 <br />1595 Wynkoop St <br />Mail Code 8P -W -GW <br />Denver, Colorado 80202 -1129 <br />Dear Ms. Cheung: <br />SUBJECT: Logs — HW8101 (H01), OW8122 (OB02), and OW8124 (OB04) <br />UIC Permit CO32210 -0000 <br />Shell Frontier Oil & Gas Inc, Oil Shale RDD Lease (COC 69166) <br />SECTION 35, T1S, R99W, RIO BLANCO COUNTY, COLORADO <br />Dear Ms. Cheung: <br />As required by Section A Part 4 Well Logging and Testing and Appendix B of UIC Permit <br />CO32210 -0000, Shell Frontier OiI & Gas Inc. (SFOGI) is submitting the Compensated Density <br />Neutron Log, the Caliper Log, and the Temperature Log on Heater well HW8101 (H01). In <br />addition, Radioactive Marker Log reports are provided for observation wells OW8122 (OB02) <br />and OW8124 (OB04). <br />The information has been reviewed by Senior Petrophysicist Engineer, Nilesh Kadam, it is <br />SFOGI's interpretation that the logs provide the required information and meet the applicable <br />permit requirements. <br />If you have any questions regarding the information in this submittal, please contact Florentino <br />Vuelvas at (281) 544 -7790. In addition, Nilesh Kadam can be reached by email at <br />Nilesh.Kadam@Shell.com. <br />Sincerely, <br />1 ,(1 , -...- <br />0 Shell Exploration & Production <br />Florentino Vuelvas <br />Staff Environmental Engineer <br />Attachments (3) <br />20130206 H01_0B02_0B04_Log Submittal_EPA.docx <br />P 20/o -o2C <br />V <br />Shell Frontier OiI & Gas Inc. <br />3333 Highway 6 South Blvd. <br />Houston, TX 77082 -3101 <br />RECEIVED <br />FEB 0 7 2013 <br />GRAND JUNCT ILm -it L.D OFFICE <br />DIVISION OF <br />RECLAMATION MINING & SAFETY <br />