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MODIFICATION 03-2009 <br />Exhibit C - AMSO, LLC Notice of Intent Supplemental Information <br />13 (L3 Monitor Well) (See Figure C.10 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 />• Rini 113/4", 47#, J-55 Surface Casing. <br />Cement with "Neat Cement" to surface. <br />• Rig up diverter and wait on cement a minimum of 4 hours. <br />• Drill out tlru 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 '/2", 15.5#, J-55 casing with a guide/float shoe. Mix and pump Type I or II <br />Portland cement via treime in multiple lifts. Wait on cement for a minimum 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. <br />• Circulate the hole for 30 minutes until formation water is observed. • <br />• <br />16