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<br />1 <br />I <br />I <br />1 <br />1 <br />I <br />1 <br />1 <br />1 <br />1 <br />1 <br />I <br />I <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br /> <br />In reviewing Exhibit IX a., concern has to be given <br /> <br />to evaluation of the stream's characteristic. As noted on <br /> <br />April 20, 1963, the stream had a flow of 1.0 cfs and total <br /> <br />dissolved salts of 1386 ppm. Although the average stream <br /> <br />flow for the period between September 15, 1958 and May 9, <br />1963, averages 22.75 cfs and the dissolved salts average <br /> <br />743.4 ppm, the critical period would be in those months <br /> <br />(usually late spring and summer) when flow is very low. <br /> <br />However, in noting the water analysis fo~ Loghill Village, <br /> <br />it is observed that the quality (salts, trace elements, hard- <br /> <br />ness, etc.) does improve with subterranean flow. <br /> <br />The attached Exhibit Xc1 is a water sample analysis <br /> <br />taken from a fire hydrant after the wells which provide water <br /> <br />to Loghill Village Subdivision had been pumped for several <br /> <br />months. In comparing this to Exhibit Xc2, which was taken <br /> <br />from a well in the same vicinity, but pumped for only 24 hours, <br /> <br />it is seen that the water quality has improved. Thus, in <br /> <br />Alternate II it is seen that this verifies the hypothesis <br /> <br />that the gravel beds will act as a filter media. However, <br /> <br />in noting Exhibit Xc2, these samples were not taken at times <br /> <br />of low flow and high dissolved salts. This period of time <br /> <br />ranges primarily from April through the irrigation season. <br /> <br />Also, in noting the Dallas streams characteristics, the dissolved <br /> <br />salts va~y greatly from month to month in no apparent syste- <br /> <br />matic pattern. Therefore, prior to acceptance of Alternate II, <br /> <br />20 <br />