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October 11, 2011 Page 13 <br />Table 3. Classification Surninary of Surface Structures[' Z <br />3 Angular Radius of <br />Structure Class Structure Horizontal Strain Slope (10-) 3 Curvature <br />(millistrain) Distortion (10 ) (mi) <br />Gas Pipe: Buried in Sandy Soil Gas Line 2 <br />Gas Valve <br />Fuel Gas Valve <br />Gas Pipe: Ancilliary Structures Gas Line Drip 2 <br />Gas Blow -Off Valve <br />Gas Line Test Station <br />Water Pipe: Buried in Sandy <br />„ Water Line 5 <br />Water Pipe: Ancillary Structures Water Discharge Point <br />5 <br />Water Disposal Pit (Lined) <br />Surface Water Body <br />5 <br />Water Disposal Pit (Unlined) <br />TV/Radio Transmission Towers Solar Panel <br />7 <br />(< 50 m) Scada Tower /Antenna <br />Wellhead Equipment Pump Jack <br />Compressors /Pumps <br />Structures on Metal Skids/ Soundproof Metal Housings for <br />Footings Compressors /Pumps /Separators /Transformers <br />Produced Water Tank <br />Methanol Tank <br />Compressors /Pumps <br />Structures on Concrete Skids/ Soundproof Metal Housings for <br />Footings Compressors /Pumps /Separators /Transformers <br />Meter House <br />Structures on Ground - Embedded Wellhead Soundproof Walls <br />Metal Columns Electrical Panel/Meter <br />5* <br />Electrical Outlet (Power for Well) <br />Roads Unpaved Roads <br />1 -3 <br />5 (Functional) <br />Paved Roads <br />10 (Structural) <br />Brick and Masonry/ Brick- Church <br />1 (Architectural) <br />1 (Architectural) <br />Bearing Walls/Low-Rise <br />1.5 -2 (Functional) <br />2.5 -3 (Functional) 12 (Functional) <br />Structures School <br />3 (Structural) <br />7 (Structural) <br />Frame House <br />Shed/Pens <br />Timber Frame Buildings Green House <br />1 (Architectural) <br />3.3 -5 1.5 (Architectural) <br />Garage <br />(Functional) <br />Barn <br />Log Frame Cabin <br />'Society of Mining, Metallurgy, and Exploration, Inc. (1992), SME Mining Engineering Handbook, Vol 1. Ed. H. L. Hartman, 2,260 p. <br />2Peng S. S. (1992), Surface Subsidence Engineering, Braun - Brumfield, hic., Ann Arbor, Ml, 161 p. <br />*Hypothesized level of allowable horizontal strain <br />Agapito Associates, Inc. <br />