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<br />t ..... t4> ""'J <br />I,'~j <br /> <br />OPERATION AKD MAINTENAKCE <br /> <br />43 <br /> <br />completed tests were obtained from the 1846 tubes planted from <br />softened water samples. Similarly. only 18 confinned positives were <br />obtained from the distribution system samples. representing less <br />than 1 .10 of one per cent of the 28,319 tubes planted. <br /> <br />I, <br />I <br /> <br />TABLE fi <br /> <br />ANALYSIS OF COLORADO RIVER WATER <br /> <br />A ".erage for Year Ending June 30, 19.,18 <br /> <br />:~) COLLlR.-\DO RIVER \\' ATI::R <br />CONSTITUENT SVMBlll. I'\.HURAL SOFTE/I."ED <br />Silica ............ SiO, 8.5 ppm 1:3.4 pprn <br />Iron.. ..Fe 'fl'. Tr. <br />Calcium .............. .............Ca 81l 31 <br /> Magnesium .......Mg ;)1.5 1:1.5 <br /> Sodium and potas!;iuJn .....Na & K 112 1U7 .. <br />~. Carbonate.. ....CDs 1 16 .. <br />I Bieal"bonate ...........HCO, H6 66 .. <br />Sulfate.. ........SO\ 325 :128 <br /> Chloride.... .......CI no ~9 <br /> Nitrate...... ......................,. ........NOs 0.3 0.3 <br /> Boron.. ... .........B 0.1 0.1 <br /> Fluorine.. ........F 0.5 0.5 .. <br /> Tota\ dissolved solids.. . 728 732 <br /> Hardness "' CaCO, <br /> Total. 344 133 .. <br /> Carbonate. 122 80 .. <br /> Noncarbonate 222 53 <br /> Free carbon dioxide ..........CO, 1 .. 0 .. <br /> Hydrogen ion concentration .....pH 8.3 .. ~.l <br /> Electrical conductivity .... ECxlO~ 1150 lliO <br /> <br />" <br />) <br />i <br />, <br />