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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 Creel,#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(4)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"TP"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 constructed 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 accommodate 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 constructed around MVVP-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 constructed 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 in 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 accommodate typical drilling equipment(water <br /> 2 <br /> I <br />