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~` <br />2.04.7(1) <br />1. Not all of the six Salt Creek ground water monitoring wells are indicated in <br />Figure 4.2-2. The applicant should show where Ground water Monitoring Station <br />No. 6 is located on this figure. In addition, there was a discrepancy in the <br />locations of several ground water monitoring stations (Nos. 3,4 and 6) in <br />Figures 4.2-2 and 4.2-3 of the original application. The applicant needs to <br />clarify the present location of these ground water monitoring stations on an <br />updated map. <br />2. The applicant should specifically indicate what the water levels were in <br />each of the ground water monitoring stations corresponding to the dates of <br />water quality analysis in Tables 4.2-1 through 4.2-5. Recording the water level <br />is a necessary component in the collection of water quality data. <br />3. The applicant should substantiate the assumptions of the transmissivity for <br />the saturated thickness of alluvium and of the average aquifer width which <br />were used in calculating the 40 gpm ground water flow on page 4-12. <br />4. On page 4-12, the applicant concluded that "within the Mesaverde Formation <br />as exposed in the study area there are no known major aquifers with substantial <br />yields of ground water". However, this conclusion is based on only five drill <br />hole samples in one specific location of the permit area. The applicant must <br />characterize with appropriate data the eastern and northern portions of the <br />permit area where coal mining will occur. Once this baseline information is <br />adequate, the applicant should be able to discuss more accurately how mining <br />activities will impact aquifers with respect to water quality, quantity, and <br />the effect upon recharge capacity in the permit and adjacent areas. <br />5. The applicant should specify which exploration boreholes confirm the conditions <br />referenced on page 4-13, paragraph 3. <br />6. According to 2.04.6(7)(a), the geology description shall include the first <br />aquifer below the lowest coal seam to be mined (i.e., the Cameo Coal seam). <br />Only one hole has been documented (7-21-1, in Figure 2.5-2) as being drilled in <br />the permit area down to include this underlying potential aquifer. The <br />applicant should submit data from any other drill hole sites in the permit area <br />and adjacent areas which include depths down to or below the aquifer beneath the <br />Cameo coal seam. <br />7. On page 4-14 and 4-15, the applicant should specify which basic parameters <br />will be analyzed (for both the ground water and surface water sampling) on a <br />quarterly basis and what will be included in the annual detailed analysis. <br />Also it is stated on page 4-15 that "should significant ground water be encountered <br />..a monitoring program will be established immediately". The applicant <br />should specify the monitoring methods andfrequency with parameters being determined <br />after an initial complete water quality analysis is submitted. Parameters should <br />be determined in consultation with the Division. <br />8. The applicant should identify the potentiometric surface of any known <br />aquifers in the area, along with known uses of water in the aquifer and water <br />table (including flow rates and water rights). If the presence of an aquifer <br />is confirmed by the data requested monitoring wells will have to be established. <br />2.04.7(2) The applicant has not submitted any minimum, maximum and average <br />flow data to identify critical low flow and peak discharge water to indicate <br />