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effluent quality. The resulting data will be displayed in a series of graphs and tables. Ta:k 3. Evaluation of the arrangement and operation of the biological system- aeration basin and secondary clarifiers to define the characteristics of the primary effluent, plant arrangement and the operating mode and their effect on the propensity to enhance or control the proliferation of bulking organisms. The task scope will include a historical review of the bulking sludge problem and discussion of the design approaches employed at other facilities. A c6py of the key papers published on this subject will be provided with the report. The study will also consider the possibility that hydrous (non-filamentous) bulking occurs and determine whether any of the known causative factors for this problem are present in the North Olmsted WWTP. The task will undertake a paper review of the capacity of the components of the wet end treatment using standard practice procedures. This will be compared to the present performance and the capacity with bulking control will also be developed. This witl include a review of the revised aeration system and process air flow control. The objective will be to define the level of success of the implements#ion of the 1993 Plan. The mass balance developed by the plan staff will be reviewed and verified. Any suggested changes will be defined and the rationale presented with the supporting documentation. Task 4. Definiflon of plant modifications required to control bulking organisms and enhance the capacity of the wastewater treatment plant. The wet end of the treatment plant is interactive with the separate components of primary clamcation, aeration, and secondary clarification and these units, in tum, 3 s, ,. a ;:~-t,..,_ .~~~_~ t~ b.~.~ ~.~ rv ~~~