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AMERICAN <br />S O D A, L L P Ed Cooley <br />Environmental Heclth and <br />Safety Mancger <br />2717 County Road 275 <br />Parachute. CO 31635 <br />Wednesday, July 28, 2004 <br />Erica Crosby <br />Colorado Department of Natural Resources <br />Division of Minerals and Geology <br />1313 Sherman Street, Room215 <br />Denver, Colorado 80203 <br />ENV.lbl .04 <br />Re: Well 20-12 (CO3858-04552) <br />Dear Erica: <br />On June 7, 2004, ASLLP installed 1404' of 2 3/8 tubing with a 7/8" coaxial cable <br />strapped to the tubing into the long string 7" on well 20-12. The coaxial cable was <br />crimped at every second joint to provide a distance reference. Upon completing the <br />installation, time domain response readings on 6/7/2004 were inconclusive• Further <br />instrumentation testing indicated a problem with the time domain response <br />instrumentation. The instrument was returned to the manufacture for calibration. <br />On June 17, 2004, the cable was again tested. The cable indicated a short circuit at a <br />depth of 1209' feet. This corresponds very closely to a crimp at 1208.84• <br />187 sacks of 15.6 Ib/gallon type G cement with 35% SSA and 0.2% CFR-3 were <br />circulated down the 2 3/8" tubing and back to the surface. The inside volume of the <br />tubing was displaced with water and leff open for future temperature logging. <br />Upon completion of the cementing, the cable was again tested. The cable indicated <br />a short circuit at a depth of 1000' slightly above a crimp at 1015.09. Upon this result, <br />ASLLP decided to allow the cement to cure and test the cable again. <br />On July 1, 2004, the cable was again tested. The cable indicated a short circuit at a <br />depth of 1000' identical to the second test on 6/17/2004. <br />Direct Line (970) 285-040i <br />International Telephone +1 (970) 285-6500 <br />General Facsimile (970) 285-6393 <br />Delivzring a C_ystal C'=_ar Ad-rancagz <br />www.americansoda.com. <br />