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~~~ V V V V C ENGINEERING <br />November 1, 2007 <br />61 I Skyline Road - Laramie, WY 82070 - (307) 742-0031 <br />FAX (307) 721-2913 - E-mail: infolar@wwcengineering.com <br />R'~~~~~D <br />NOV ~ ~ '~n01 <br />`~~SafetY n. <br />BLM pivis-olf "' and <br />455 Emerson St. M'n~n9 <br />Craig, Colorado 81625-1129 <br />RE: Monitoring Well Abandonrnent/Transfer Ownership, Edna Mine <br />Dear Sir/Madam: <br />Chevron Mining Inc. (Chevron) has contracted WWC Engineering (WWC) to assist in <br />attaining bond release for the former Edna Mine, Permit Number C-80-001, located in Routt <br />County, Colorado. The Edna Mine is in permanent cessation, reclamation is nearly complete, <br />and the site is approaching potential final bond release. Prior to and during mining activities <br />numerous monitoring wells were drilled within and extending outside of the permit boundary. <br />The monitoring wells are constructed of steel/PVC casing ranging in diameter from 1"-6" and <br />depth from tens to hundreds of feet. Most monitoring wells are completed with a 6" stick-up <br />above ground and a protective housing at the well head, however some wells are flush with <br />the ground. The construction of the monitoring wells was for observation not production. <br />The monitoring wells had numerous purposes including attaining water level and/or water <br />quality data. The referred monitoring wells have since been removed from the Edna Mine <br />groundwater monitoring program. These monitoring wells need to be either plugged and <br />abandoned in accordance with state regulations or transferred in ownership rights to the <br />current property owner prior to final bond release. The following monitoring wells are located <br />on your property (Figure 1): <br />• OS-O1-0002 <br />• OS-O1-0003 <br />• OS-O1-0004 <br />• OS-O1-0005 <br />• OS-O1-0012 <br />• EBR-2 <br />The aforementioned list includes monitoring wells referred to in the Edna Mine Permit and <br />monitoring wells which have been observed in the field. Those monitoring wells not located <br />during our field inspection are assumed to have been plugged and abandoned or destroyed by <br />mining or other activities. However, should you as a landowner locate such a well within 5 <br />