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<br /> <br />-o~ <br />. .,",.... <br />.. <br /> <br />;l~ <br /> <br />:\IETkOI'OLIT.\;'; W.\TER IJIST[{)CT <br /> <br /> <br />- <br />- <br />- <br />- <br />:i- ~t~ <br />_ .r'!_ <br />i~~ 'Ji. .. <br />~4. -:., <br /> <br />(;oleraf dew of .om/tcl/iurl fIIU( jiltmtioll pltlJ/t <br />a stand-by unit, tht.rt'br IwrmittinJ( two to n'mllin in olwl'atio!l at <br />all tinlt's. <br />The porou:-; pl<ltl. typ\"' of ullderdrain installed in Ollt' suftem'f <br />unit for te1'lt purpo....es was found to Lt, ulh'aU;;factory due to clog. <br />ging b:o.' fine p.lrticle.-: of alum j\()(~ carrit'd through the sand mten.; <br />into the softelH'r inlluent \\"att-I". It was repll\l'ed by the Jrracled <br />gravel tY11t:' of bottom installed in the other softener units. <br />In ;m attempt to imJlron~ flow characteristkl' and HOt' i'ettling in <br />the daritil'rs. the horizontal balfles wt:'re remowd from within the <br />eenter ft'ed wells of both hailins. Fin..fnot stet'! "hltl's Wt're installt'd <br />to close completely all ports ;u'ound tht> cylinders to the lewl of the <br />top of the :-l('rllper arm:-l. Extemdon arm:-l und prohing' tip:-l were <br />attached to both end:-l of the :-lcr<lper in clariner Xu. 1 in ordt'r to <br />pro\"idt.' :-lludge remo\"..1 from th<, l'ornt'rs of thl' h;t:-lin. To the end <br />of the ri:-lcal yenl', this in:-ltallation had proH'{1 mut'h more satisfac- <br />tory than the ori"l'jnal in whit'h only one t'xtensiol1 arm and probing <br />tip had heen u:-led in conjUll<'tion with each scrupt'r. which led to <br />the SUb:-ll"tllll.'nt remo\";tl of these attachment:: tlut' to trouble:-lome <br />operation. Timt.' did not permit the iniltallntion of exten::ion arms <br />and probing tiJli'l in daritier ;\0. 2. Thesl' will be in....tallt;"tl in the <br />winter of 1 V.}~kJ9 whton the bHsin cnn be t..tken out of t<er\"ict'. <br />Tht' :-lupply of l'IectrleHI j'nergy to the plant was mttintained withd <br />l <br /> <br />