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/IM-i~~3-«~ <br />~„yc.o sr,~rFs <br />2m ~ U <br /><A ~ W <br />O ~' <br />?~ <br />~F~rgC PROT~~,o~ . <br />Ref: 8ENF-UFO <br />DEC 1 7 2G07 <br />CERTIFIED LETTER 7005-1160-0005-3397-1626 <br />RETURN RECEIPT REQUESTED <br />Ms. Cindi Byrnes <br />Environmental Health and Safety Manager <br />Natural Soda, Inc. <br />P.O. Drawer 72 <br />3200 County Road 31 <br />Rifle, Colorado 81650 <br />h~Iining ana ~:,~fety <br />Re: Underground Injection Control (UIC) <br />Request for Information <br />EPA Permit #C030358-06596 (Well #7H-1R) <br />EPA Permit #C030358-06597 (Well #7H-2I) <br />Rio Blanco County, Colorado <br />Dear Ms. Byrnes: <br />This letter seeks information regarding the status of the above-referenced well pair, <br />whose surface locations are only a few dozen feet apart. We understand that this well pair was <br />originally intended to be configured with the #7H-2I used for injection and #7H-1 R used for <br />recovery. On December 21, 2004, the U.S. Environmental Protection Agency, Region 8 (EPA) <br />issued authorization to Natural Soda, Inc. (NS) to construct the above named well pair. In a <br />letter dated October 14, 2005, NS informed EPA that it had drilled and completed the #7H-2I <br />well and provided notice that the #7H-1R was next to be drilled with a planned completion of <br />October 24, 2005. During inspections by EPA on July 18, 2006, and June 11, 2007, both wells <br />were observed to have been drilled, but were not yet in operation as an injection and recovery <br />well pair. There has been no authorization given by EPA to commence normal operational <br />injection in either well. <br />NS has described to EPA that there have been problems establishing communication <br />between the two wells. As reported to EPA, after injection into the both #7H-2I and the #7H-2R <br />wells for the purpose of establishing a hydraulic connection, there has been no downhole <br />breakthrough from one to the other, and NS believes the wells are completed in distinct <br />geological zones such that they may never be able to be used as a mining pair. It appears that <br />both wells have remained in a state of sporadic use for testing purposes since they were drilled <br />and completed in late 2005. <br />Phone 800-227-8917 ~ ~ ~ ~ ~, ~~ <br />http://www.epa.gov/region08 ~~ <br />AFC ~ ~ ~~or <br />UNITED STATES ENVIRONMENTAL PROTECTION AGENCY <br />REGION 8 . <br />1595 Wynkoop Street <br />DENVER, CO 80202-1129 <br />