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i <br /> ! WASTEWATER DIVISION PAGE I <br /> I _1--~ <br /> QPERATIONS <br /> In 2003, 14.3 billion gallons of wastewater <br /> were treated to better than permit standards W , _ <br /> before being discharged into the Willamette ` <br /> River. 2003 will make for the eleventh . <br /> straight year of no treated effluent permit ~ <br /> violations. <br /> _ ~ - <br /> - ~ - ~ <br /> r~ ~ ~ 1 <br /> ~ F ~ ~ t <br /> r.'- <br /> r ~ ~ i, 1. <br /> Uk <br /> r ~ <br /> ~?;f ~ ~ <br /> 3 <br /> The information provided by the analyzer A major upgrade to the 1991 facility dis- <br /> j was immediately put to use in controlling tributive control system was performed in <br /> ' the ammonia oxidation process. July and August by plant staff. The com- <br /> puter system monitors and provides a level <br /> of control to all of the regional facilities. <br /> The up-grade required the transfer of the old <br /> system database and construction of new <br /> <br /> 'i graphic interface panels, control groups, <br /> 'i trend groups, and instrument panels. The <br /> , _ _ purchase of an on-line ammonia, alkalinity, <br /> ~ ~ and pH analyzer has help to make timely <br /> adjustments to the secondary treatment <br /> process to meet the ammonia limits set in <br /> the NPDES permit. The installation was <br /> [ _ _ ~ _ . ` ~ _ ~ ~ completed in October 2003. <br /> ,~t, ~ E <br /> - <br /> d <br /> _ _ <br /> _ <br /> t=~-- -BOB SPRICK <br /> a _ ~ <br /> i , a, _ <br /> ~.u. _ R~ <br /> i , <br /> I <br /> <br />