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MODIFICATION 03-2009 <br />Exhibit C - AMSO, LLC Notice of Intent Supplemental Information <br />DRILL PAD HB <br />HB-L3 (See Figure C.7-Amend 03-2009 in this section) <br />• Drill 17" hole a minimum of 40 feet or until at least 5 feet of competent bedrock <br />is encountered. <br />• Run 113/4", 47#, J-55 Surface Casing. <br />• Cement with "Neat Cement" to suuface. <br />• Rig up diverter and wait on cement a minimum of 4 hours. <br />+ Drill out thru the surface casing with 10 5/8" diameter PDC bit. Advance drill <br />hole to 1600 feet and circulate a minimum of 30 minutes. <br />+ Run 5 Y,", 15.5#, J-55 casing with a guide/float shoe. Mix and pump Type I or H <br />Portland cement via treme in multiple lifts. Wait on cement for a ininimurn of 12 <br />hours. <br />+ Trip in the hole with nominal 4 5/8" drill bit and drill cement and float shoe. <br />• Air drill to a Total Depth of --1750 feet. 0 <br />• Circulate the hole for 30 minutes until formation water is observed. <br />• <br />10