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<br />j <br />i <br />I <br /> <br />II <br /> <br />. <br /> <br />.' <br /> <br />.' <br /> <br />'ZOl~ <br /> <br />Figure No. 2 also shows the decrease in the sodium and chloride con- <br /> <br />centrations compared to the total dissolved solids. Table 4 also indi- <br /> <br />cates that the conc~ntration of potassium has been decreased and that the <br /> <br />proportionate parts of sulfate increased less than the proportionate <br /> <br />parts of calcium, maenesium, and bicarbonate. Further quality ilnprove- <br /> <br />meut should, occur as the return flmls drain from the lO ,000 acres of <br />I <br />, land irrifated with water diverted <br /> <br />Piceance treek Hell <br /> <br />downstream from the, well. <br /> <br />No quality sarr.ples of the creek water near the well wcre obta,ined <br /> <br />priorlto August 5, 1968. The FWPCA, however, did obtain eight quality <br /> <br />samples at the, creek mouth during 1965 and 1966. The August 5 quality <br /> <br />sample a half mile dO;lDstream from the well indicated the well was con- <br /> <br />tributing about 50 perccmt of the sodium and bicarbone.te in the creek <br /> <br />at the time. The percentage of the salt load contributed by the well <br /> <br />will vary conSiderably, however, as the average daily discharge of the <br /> <br />creek past the well may vary from about 1 second-foot to over 200 <br /> <br />second-feet during a year. <br /> <br />After the well was plugged, four samples were obtained a half mile <br /> <br />downstream from the well and at the mouth of piceance Creek. Table 6 <br /> <br />shows the analysis of the sa'1lples obtained a half mile below the "ell <br /> <br />and Table 8 shows the analysis of samples obtained at the mouth of <br /> <br />Piceance Creek. Table ,6 indicates a reduction in the concentration <br /> <br />of the sOdium and bicarbonate mineral but, because of the fluctuating <br /> <br />flows and the lack of prior quality records, the reduction in salt load <br /> <br />cannot be determined. Table 7 J the mineral concentration of the samples <br /> <br />adju~ted to the concentration of the -'\\lV'st 5 sUf!lple, inllieates that after <br /> <br />9 <br />