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Doc Date:1211112001 1999 BOREHOLE DRILLING ()V1R#261) II I I IIIII I IIIIII III <br />MAIN MINE SITE AND 999 <br />SYLVESTER GULCH FACILITIES AREA <br />SCOPE OF WORK <br />Mountain Coal Company, L.L.C. (MCC) proposes to drill fourteen (14) boreholes. Twelve (12) <br />of the boreholes will be located in the vicinity of the main mine facilities, and the other two (2) <br />holes will be located in Sylvester Gulch. Of these boreholes, 1 will be completed as a <br />monitoring well, 6 will be completed as inclinometers, and 7 will be completed as piezometers. <br />Three of the inclinometers and three of the piezometers will replace current installations that aze <br />no longer functional. The remaining installations will provide additional coverage for the site- <br />wide geotechnical monitoring program. Borehole 99-01, will become RPE-7, the additional <br />monitoring well added to the ground water monitoring program in Technical Revision No. 88. A <br />summary table of the holes to be drilled, their depths, and how they will be completed, and a <br />map that shows the location of these holes is attached. <br />All boreholes will be drilled in previously disturbed azeas. No topsoil stripping will be <br />necessary, and no temporary roads will be required to access the boreholes. The well, <br />piezometers, and inclinometers will have a protective casing to protect the hole from damage. <br />Soil sampling will be conducted on four of the boreholes, 99-03, 99-04, 99-10, and 99-11. Split <br />barrel soil sampling will be conducted every five feet, starting at five feet and ending at bedrock. <br />MCC expects most of the formations to be dry; however, there may be some shallow saturated <br />zones that may be encountered during drilling. Reclamation of the piezometers and <br />• inclinometers will occur when the installation is no longer functional, or in the case of the <br />monitoring well, removed upon approval of the Division. MCC will adhere to Rule 4.07.3(1) or <br />(2), depending on conditions encountered, when sealing any boreholes. <br />MCC expects to begin this drilling project on June 28th. <br />• <br />Exhibit I1A June 1999 <br />m.?6l.doc <br />