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J. J. Dudash -4- June 1, 2010 <br />BRL - The requested information was included on page 2.04-26 and Volume III, Tab 6. <br />Section 2.04.7 Hydrology Description <br />14. Please update the Method of Study history discussion that starts on revised page 2.04-28 of <br />Section 2.04.7 to include the corresponding information found in Section 2.04.7 of the <br />Bowie No. 1 permit application. <br />BRL - The method of study in the western mining district was added to page 2.04-28. <br />15. The baseline water monitoring data presented in PR-12 do not correspond with the baseline <br />data currently in the approved permit applications for the Bowie No. 1 Mine and the Bowie <br />No. 2 Mine. First, the data are presented as summaries, rather than as individual monitoring <br />results. The Division had requested summaries of baseline data for the annual hydrology <br />reports to aid in the adequacy review of the reports. The baseline data in the permit <br />applications should be the original monitoring data. Even as summaries, however, the PR- <br />12 baseline data appear to be summaries of monitoring results from the beginning of <br />monitoring up to 2009, whereas the currently approved baseline data ends at some <br />activation date, as shown in the annual hydrology review data sheets. Since the baseline <br />water monitoring data for the currently approved permit area is already in Exhibit 3 of <br />Volume III, BRL only needs to transfer the relevant baseline data from the Bowie No. 1 <br />permit application over to the Bowie No. 2 permit application. <br />BRL - Relevant baseline data from the Bowie No. 1 mine are enclosed. The most recent <br />seasonal data is presented along with a summary, minimum, maximum and average for the <br />period of record. If the monitoring point has been affected by mining, the baseline data is <br />segregated based on the affected date. <br />16. On revised page 2.04-32 BRL describes one down gradient monitoring well for the western <br />mining district located in the Terror Creek drainage (TC-03-03) and that they propose to <br />install an additional down gradient monitoring well (2010-1) during 2010. Existing well TC- <br />03-03 monitors the sandstone above the B-Upper Seam. BRL. has not identified what the <br />completion zone will be for the 2010-1 well. Please add to page 2.04-32 a brief discussion <br />of what zones will be monitored with each of these monitoring wells. <br />BRL - A brief discussion of the zones that will be monitored in wells 2010-1 was added to page <br />2.04-32. <br />17. On page 2.04-34 the existing text regarding perched groundwater has been modified and <br />the text regarding the Upper Perched Water Zone has been removed. Also it appears that <br />Map 10-Upper Perched Water Zone has been removed from the PAP and replaced with <br />Map 10-A "Above the B-Seam Potentiometric Surface". New text has been added which is <br />confusing and appears to conflict with all of the previous information presented for the <br />Upper Perched Water Zone. Perched groundwater for the Bowie No.2 mine has always <br />been described as the Lower and Upper Perched Water Zones (located between the Rollins <br />Sandstone member and the "C" coal seam as presented in the revised text and the other <br />located above the "D" coal seam, respectively). What has happened to the discussion of the <br />Upper Perched Water Zone in Section 2.04.7 and is a new perched water zone being <br />described as located above the "B" coal seam (shown on Map 10-A)? Reference to Upper <br />Perched Water Zone still appears throughout the remainder of the text including on pages <br />2.04-37, 2.05-102, 2.05-115, 2.05-116 (again the Upper Perched water Zone is described in