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Page 5 <br />January 13, 2015 <br />Owner: Noble Energy, Inc. <br />• 05 -123- 11900, Mobile Premix 4 -35 <br />• 05 -123- 23229, Mobile Premix 135-8 <br />• 05 -123- 23233, Mobile Premix 135 -17 <br />• 05- 123 - 23231, Mobile Premix 135-4 <br />• 05- 123 - 23234, Mobile Premix 135 -23 <br />• 05 -123- 23235, Mobile Premix 135 -23 <br />• 05 -123- 23860, Mobile Premix 135-1 <br />• 05- 123 - 11901, Mobile Premix 1A -35 <br />• 05- 123 - 10981, Mobile Premix 3 -25 <br />• 05 -123- 22216, Flathead 135 -12 <br />• 05- 123 - 23194, Mobile Premix 135 -19 <br />• 05- 123 - 23218, Mobile Premix 135 -6 <br />• 05- 123 - 10980, Mobile Premix 2 -35 <br />Owner: F Street Property LLC, 1639, 35" Ave Ct, Greeley, 806342 <br />• Commercial structure <br />Mr. Peter Hays <br />Colorado DRMS <br />Stability Analyses <br />Stability analyses were performed in order to evaluate potential for damage to existing <br />permanent structures in relation to the soil - bentonite cutoff wall design. Analyses were <br />performed with Slope/W 2012 v. 8.12.3.7901 computer program. For each case we analyzed <br />the most critical soil profiles based on exploratory boring data (i.e. tallest section of the soil - <br />bentonite cutoff wall, shortest section of the soil- bentonite cutoff wall, thickest overburden, <br />etc.). <br />Conservative strength parameters were utilized based on GEI experience near the 35th <br />Avenue property. The reclamation slope was assumed to be constructed with compacted <br />sandy clay or clayey sand obtained from the overburden available onsite. <br />The strength parameters and properties utilized in the analyses are summarized in Table 2. <br />Table 2: Slope/W Input Parameters <br />Soil Unit <br />Unit Weight <br />(pcf) <br />Cohesion, c' <br />(psf) <br />Friction Angle, m <br />(degrees) <br />Slurry Wall <br />115 <br />0 <br />20 <br />Working Platform <br />130 <br />0 <br />33 <br />Sand and Gravel <br />125 <br />0 <br />35 <br />Bedrock <br />120 <br />1 100 <br />1 30 <br />