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• • iii iiiiiiiin~ii iii <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Deparlmenl of Natural Resowces <br />1313 Sherman 51., Rnom 215 <br /> <br />Dem•er, Colorado 80203 i~ <br /> <br />Phone: 13031 866 3567 I <br />I <br />FAS: (3031 8J2-8106 <br /> DEPARTMENT OF <br /> NATURAL <br />Date: June 19, 1996 RESOURCES <br /> Roy Romer <br />To: NOV C-96-013 File c°vernor <br /> lames 5. Lochhead <br /> 6eruliae DueUOr <br />From: David Be h},cnael 8. Lung <br /> Divisron Director <br />Re: Material Balance/Subsoil Salvage <br />Today I spoke with Norm Avery (MCC) regarding our field measurements observed June 13, <br />1996, pertaining to NOV C-96-013. <br />Avery verified my measurements of the subsoil area covered by refuse as about 27 ft x 30 ft. My <br />estimate of subsoil depth was about 2 feet. Avery's estimate of subsoil depth was 18 inches. <br />Norm stated that the pile of subsoil pushed to the north edge of the bench, and created during the <br />abatement activity, was about 25 yds'. This seems reasonable, and we did discuss this volume <br />estimate in the field on June 13, 1996. <br />Avery estimated that the 2S yds' of subsoil material originated from a total area of about <br />55 ft x 33 ft. This also is reasonable. <br />I stated that I agree with tl.e overall area measurements, and that it is possible that the in-place <br />subsoil depth was closer to 18 inches, rather than 24 inches. <br />Avery estimates that about 12 yds' of the salvaged subsoil material came from the area covered by <br />refuse, and that about 1 yd3 of subsoil was lost in the process. I stated that I would review the <br />math to determine whether I agree with the conclusions regarding subsoil loss provided by Avery. <br />DAB/bjw <br />\eiw\C96013.ona <br />