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<br />-6- <br />c. The operator stated on page 3 first paragraph that <br />"because the drainages area all ephemeral and rarely <br />flow, gauging stations have not been established on the <br />project site". However on Figure G-2, Northwest of <br />DFMW-1 there appears to be a gauging station located. If <br />it is a USGS gauging station, there probably is water <br />quality and flow data for the station. Please provide <br />the data. Since the gauging station is outside of the <br />permit area and the two quarries are located up stream of <br />the gauging station it will give the Division additional <br />data to make an educated determination of the impact your <br />quarry will have on downstream water users. <br />d. On page 3, in the last paragraph the operator stated "The <br />results of the historical surface water quality analysis <br />for SVC-1 and SVC-2 are summarized in Table G-4". Table <br />G-4 has only water quality data for SVC-1. Where is the <br />water quality data for SVC-2? Where are these monitoring <br />locations located on the map or Figure G-2? <br />e. The operator had stated on page 3 that surface water <br />quality data was collected on a quarterly basis starting <br />in June of 1990. However the water quality data provided <br />on Table G-5 is for June 1990, September 1990 DFSW1; for <br />June 1990, September 1990 and December 1990 for DFSW-2 <br />and DFSW-3. Where is the rest of the data? Why was <br />there no data collected in early May when spring runoff <br />is at the maximum? <br />At a minimum four quarters of data should be provided to <br />properly evaluate seasonal variations. If there were no <br />flows during a quarter it should be reported as such. <br />In Table G-6 are the Dowe flats water quality <br />concentrations. Are these averages for DFSW-1, DFSW-2, <br />and DFSW-3? If not, where did the figures come from? If <br />the data is the averages of the above stations please <br />explain in detail how it was divided because some of the <br />numbers do not make sense e.g. Temperature column has <br />the following numbers: 226, 55, 86.9. The only <br />explanation at the bottom of the page states, <br />"Concentrations are highest values recorded or highest <br />and lowest for the station over three quarters of <br />monitoring ground water. <br />f. On page 8 the operator stated that "because of the <br />thickness and the low permeability of the Niobrara <br />Formation, it is anticipated that none of the deeper <br />aquifers below the Niobrara will be impacted by the <br />proposed quarry.^ The Division can not accept this <br />statement without the appropriate ground water modeling <br />which will show that the operation in relation to the <br />deeper aquifer. <br />