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~,~ <br />STATE CJF <br />COLORADO <br />OlL & <br />GA S <br />V COMMISSION <br />GEPARTIbIENT Gr <br />NATURAL RESOU <br />Bl!l Owens, Gr <br />1 i 20 Linrnln SL, 54 <br />penvet, CD <br />Phone; (303) 69~ <br />FAX: (393) a9~ <br />October 25, 2000 <br />RECEIVED <br />Mr. Stanley Barron Q CT 3 ~ 2UD0 <br />President <br />Spanish Peaks-Purgatoire RiYer SCD t)ivislon DI Minerals & Geology <br />422 East First Street . <br />Trinidad, CO 81082 <br />Re: Metbanegns-seep-on the-T'oupal Property, Center of Sec. 2$-T339-RG7W, Las <br />A n;mae County, Colorado ~. <br />Deaz Mr. Barron, <br />The Colorado Oil and Gas Conservation Commission (COGCC) has investigated a <br />methane gas seep reported north and youth of Highway 12 at the east end of the Basin <br />Resources Inc. Mine, centered in Section 28, Township 33 South, Range 67 West, Las <br />Anitnas County- TWo shut-in gas wells dQwngradient were implicated as-the possible <br />source of the seep. Field investigation revealed inethane.in the brdderiliead of the eastern <br />well, the k~ickefwire 28.70; the bradenhead a19o bad 20 pounds of pressure. Nb pressure <br />was found in the casing or bradenhead in the western well, the Picketwire 28-11. <br />Investigation of the soil adjacent to the wells, using a Flame Ionization Device (FID), <br />revealed Ao methane. The FID is capable of measuring .0001 percent hydrocarbons, <br />Four monitor wells installed by Basin Mine consultants (C3teystone) near the Picketwire <br />28-11 had varying levels of methane When tasted with the FID. These monitor wells are <br />37 feet to 105 feet away from the Pickctwire 26-i I. Two monitor wells neaz the <br />Picketwire 28-10 were tested with the F]D; there was no gas in these monitor wells. <br />StrESSed or dead vegetation i6 present at thcseep,.The areas of"dead vegetation, the gas <br />wells and the monitor wells were mapped using a Global 1'ositioa System (CPS) <br />instrument capable of 1 to 3 meter aoctuary with differerttial correction. The gas wells <br />were drilled in October, 1990, An infrared aerial photo dated August 26; 1940 was <br />ordered from the EROS Data Center (see attached photo). An overlay of the GPS map <br />was made and attached to the infrared photo, it shows the stressed and dead vegetation <br />existed in almost the same spots before the gas wells were drilled. <br />The gas wells were never commercially produced. The Picketwire wells were plugged <br />October 9a' and 10`h by t:reoMet. You witnessed the plugging of the wells. The ground <br />arouttd the gas wells was excavated to approximately ] 0 to 1 S feet below ground surface <br />(bgs). The FIp was used to check the soil around the well casing in the excavation, no <br />DEPARTMENt of NANPAt P~SWPCES: Grea z.vr4tmer, Efewn•e D'eMcr <br />COGCC CGMMI991GN: Tan Mn Gay • Blleq Clee - 9rucp wMson • MlcheH pled • Ape PMllp+ • Doniel +kreberz - 9leppen 5annendery <br />CDGCG STAPF: Plcf,+b' GflenOnO. DpeGM • 6r1•n'7. Macke, De Wn Dlro~r - Ma,fie B•B, opweryme i+„nae•• <br />Pelnda C. Bee~x HeeMp• Mene9rt-Tlloldae a Kert. Inbrroaibn Memper <br />100 <br />l <br /> <br />i` <br />..: . <br />:(• , <br />j .' <br />r. <br />~' <br />L' <br />j:::. <br />`; <br />I~ <br />