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<br />Using this dote on a semilog plot of reslduel drer tlorn versus <br />t/t' (recovery plot), yields a trensmisSlvlty of SO gallons per <br />day per foot (GPD/FT). The eQuetion used is es follors: <br />T 264Q <br />• s'-_ <br />The everege discharge (Q) during the floc period ras 4 GPM. <br />The change In reslduel tlrar dorn (s') over one log cycle res 21. <br />LJ <br /> <br />