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SD-5 SOUTH PLUME <br /> RESPONSE TIMELINE (con't) <br /> ■ Dec 1997 - SD-5 Plume <br /> Response Decision <br /> - Recirculating Well tech <br /> (Alternative E) <br /> - dull start-up June 1999 <br /> - 30% Plume into/beneath <br /> pond prior to June 1999 <br /> - 62% of remaining 70% (e.g ., <br /> 90%) captured and treated <br /> by Alternative E <br /> - Alternative E expedites <br /> aquifer restoration (4-5 yrs) <br />