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EUGENE/SPRINGFIELD WATER POLLUTION CONTROL FACILITY <br />WPCF OPERATIONS SUMMARY <br /> <br /> <br />- Average <br />Daily Flow <br />(MGD) Total <br />Monthly <br />Rainfall (in.) Average <br />Effluent <br />CBOD <br />(mg/L) Average <br />Effluent TSS <br />(mg/L) Average % <br />Removal Average <br />Effluent <br />Ammonia <br />2003 <br />JUL 23.8 0 4 7 96.5 9 <br />AUG 22.5 .25 4 6 97.5 9 <br />SEP 23.0 1.08 3 8 97.0 8 <br />OCT 22.9 2.68 4 8 97.5 5 <br />NOV 30.6 5.45 5 8 96 11 <br />DEC 67.2 10.9 4 9 93.5 8 <br />2004 <br />JAN 70.8 6.88 3 5 95.5 5 <br />FEB 54.5 3.77 3 4 97.0 6 <br />MAR 36.4 1.71 4 3 98.0 9 <br />APR 33.6 2.87 4 ~ 99.0 12 <br />MAY 28.5 1.99 4 6 97.5 6 <br />J[JN 29.1 1.78 5 8 96.0 7 <br />A total of 873.6 million gallons of wastewater were treated at the WPCF to better than permit standards in June. The <br />treatment processes removed 1,311,448 pounds of suspended solids, 1,165,732 pounds of organics, and 112,201 pounds <br />of ammonia. 2,978,427 gallons of leachate from the Short Mountain Landfill were processed. 7,668,100 gallons from <br />the facultative sludge lagoon (FSL) were sent back to the WPCF to be re-processed. <br />The activated sludge treatment process experienced an upset that lasted for a little over two weeks early in the month. <br />All available clarifiers were placed in service along with extra contact chambers to maximize the suspended solids <br />capture. The upset to the biological system resulted in a de-flocculation of the biological growth. The process design <br />function of activated sludge is based on the ability of the biological growth to flocculate or come together and settle to <br />the bottom of the secondary clarifiers. This is a fragile process that is easily upset by inattentive culturing of organisms <br />or chemical upsets brought on by compounds in the influent. The microbial analysis indicated not abnormal fluctuation <br />of bacterial organisms. To date, we have not been able to identify an influent source agent. <br />4 <br />