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THE INFORMATION ON THIS PAGE DOES NOT NEED TO BE HELD CONFIDENTIAL <br />Exhibit C - AMSO, LLC Notice of Intent Supplemental Information <br />In addition to the existing drill pad, one former oil and gas well (Sulfur Creek #1 <br />Piceance Basin) is present at the site. The well is located immediately west of the <br />existing unimproved two-track road in the northern portion of the site. The well was <br />constructed by the Great Yellowstone Company in 1962. <br />Location of Proposed Surface Disturbance <br />Surface excavations or other land disturbance proposed in support of AMSO's testing <br />program are shown in Figures A.2 and A.3 (Exhibit A) and include (1) construction of <br />three well pads, (2) construction of access roads leading to two of the new pads, (3) <br />improvement of an existing two-track road leading to the third pad, and (d) construction <br />of a by-pass road to provide continued use of the existing two-track road. The first pad, <br />referred to herein as "Test Pad" or "TT" will be constructed adjacent to the existing BLM <br />access road near the center of the tract. A short road will be constructed from the existing <br />BLM road to access the Test Pad. The second pad, referred to herein as "HB Pad", will <br />be constricted east-southeast of the Test Pad in the eastern portion of the tract. An <br />access road will be constructed from the existing BLM road to the pad along the <br />alignment of an apparently abandoned two-track road. The third pad, referred to herein as <br />"MWP-2", will be constructed downgradient (north-northeast) of the Test Pad. An <br />existing two-track road extending from the existing BLM road to MWP-2 will be <br />improved to accormnodate heavy equipment traffic. The existing two-track road <br />currently provides access to public lands north of the tract. To ensure local access to <br />lands north of the tract, a short section of road will be constricted around MWP-2. <br />Construction Details <br />A General Permit for Stormwater Discharges Associated with Construction Activity will <br />be obtained from CDPHE for the proposed construction activities. Topsoil and woody <br />vegetation impacted during access road and drilling pad construction will be managed as <br />described in Section IV, Item No. 3 below. Subsoil generated during construction will <br />stockpiled on the pad separate from topsoil and used for construction of berms and water- <br />control structure and replaced during site reclamation. Following vegetation and topsoil <br />removal, drill pads will be constricted as shown in Exhibit D. All fill areas will be <br />properly compacted to minimize the potential for subsidence or slope failure. To reduce <br />erosion and soil loss, ditches and berms will be constructed to divert stormwater away <br />from the pad. Silt fencing and/or other sediment retention measures will be used to <br />reduce sediment migration from the disturbed area. A lockable gate per BLM <br />specifications will be installed at the entrance to each pad to prevent unauthorized access <br />to the pad. <br />Proposed Access Roads <br />Access roads to facilitate operations will be constructed iii accordance with BLM <br />standards. New access roads will be constructed to the Test Pad and HB Pad, and an <br />existing two-track road leading to MWP-2 will be upgraded (Exhibit A, Figures A.1 and <br />A.2). The roads will be designed to accomrmodate typical drilling equipment (water <br />2