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<br /> <br />~ ~ <br />The/applicant should provide substantiation for I / <br />ttye assumptions of the transmissivity for the <br />, aturated thickness of alluvium and of the average <br />V aquifer width ;which were used in calculating the--J <br />40 gpm groundwater flow on 'page 4-12. <br />On page 4-12, the applicant concluded Chat "within <br />the esaverde Formation as exposed in the study <br />a a there are no known major aquifers with substan- <br />\( ial yields of groundwater," However, this conclu- <br />sion is based on only five drill hole samples in <br />one specific location of the permit area. The ap- <br />plicant should provide additional data for the <br />' eastern and northern portions of the perma <br />where coal mining will occur. <br />-~tre~icant should more clearly discuss hoea <br />mi 'ng activities will impact aquifers in fault! <br />d fracture areas with respect to water quality, <br />O quantity, and rech_ arge capacity in the permit and <br />adjacent areas.( The app icant s~also specif <br />whic exp oratiai~boreholes "confirmed" these <br />conditions as is referenced on page 4-13. <br />According to 783.14, the geology description shall <br />include the first aquifer below the lowest coal <br />seam to be mined (i. e., the Cameo Coal seam). <br />apparently, only one hole has been documented (7- <br />21-1, in Figure 2.5-2) as being drilled in the <br />permit area down to include this underlying aquifer <br />O, The applicant should submit ra frnm any~Qthpr_ <br />drill hole sites in the e yea--wkzi~h inr1, de <br />de own Co or below t e aquifer bQneattLthe <br />Cameo coal seam. If no other data is available <br />2 presently, the applicant will need to submit with <br />th t ermit applica core sample data from <br />~ more drill ho e sites in the proposed area of <br />mining. <br />~2 <br />/~` <br /> <br />,, a~ <br />The a pliGanC sh uld ~u e dis ~retion`not Ito ov'errstate <br />act a c6n~lition such s % n page 4-~14 in the 1 % ~C <br />st to exit ' holes red' fr quently ,dry.ti Act~ially, <br />o y tTiree of~the 2x g oundwa~,~ter mohvEoring v <br />s ations ha~e been frequently dry. <br />On page 4-14 and 4-15, the applicant should specify <br />w~ich basic parameters will be analyzed (for both <br />the groundwater and surface water sampling) on a <br />quarterly basis and what will be included in the <br />~- an, nual detailed analysis. The applicant also, <br />stated on page 4-15 that "should significant ground- <br />water be encountered...a monitoring program will <br />be established immediately." The applicant should <br />specify the monitoring frequency and parameters <br />for this program. <br />l,~Q~ <br />