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Mr. Travis Marshall <br />August 18, 2008 <br />Page 4 of 5 <br />DRMS and the BLM. AMSO understands that a CDPHE WQCD discharge permit would be <br />required for such disposal. <br />6 For the drilling and completion of drill holes, please speck how much time is anticipated to <br />"circulate the hole clean "? <br />AMSO Response: <br />Circulation during drilling operations will be conducted for a minimum of 30 minutes and until <br />water returning at the surface shows no visible evidence of drilling additives (mud/foam). <br />7. Please sped the composition of the foam used in drilling circulation? <br />AMSO Response: <br />The foam to be used during drilling circulation consists of a proprietary blend of alcohol <br />ethoxy sulfates that are biodegradable. The foam is commonly used during the drilling of <br />domestic water wells. The product is NSF/ANSI Standard 60 certified. <br />8. Please explain the meaning of "short trip any tight spots. " <br />AMSO Response: <br />The phrase "short trip any tight spots" refers to the general procedure used to clear tight areas <br />within the hole. The procedure involves passing the drill bit back and forth through the tight <br />area to clear the obstruction or constricted zones. <br />9. Well CH-01 is designated as a Continuous Core and Hydrology Test Hole. The diagram <br />indicates that the hole will be open across an interval of 2, 000+ ft. Please sped what kind of <br />hydrology testing will be performed in this hole? <br />AMSO Response: <br />Please see our response to Item No. 1 above. <br />10. Please provide additional detail regarding the &-ill hole plugging and abandonment plan on <br />page 28 of the NOL Please see the enclosed DRMS plugging and abandonment guide for <br />information. Detail is required for DRA& staff to accurately calculate reclamation costs. <br />110 East 3 Street, Suite 201 P.O. Box 1470; Rifle, CO 81650 Phone: 970-625-4324 Facsimile: 970-625-4318