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Figure 12-8 Long-term trends in population served and effluent flow for the Metro plant in St. Paul, Minnesota. Source: Larson, 1999, 2001; D. K. Johnson and P. W. Aasen, J. Minn. Acad. Sci. 55(1), 1989.

Figure 12-9 Long-term trends in effluent concentration of BOD5 for the Metro plant in St. Paul, Minnesota. Source: Larson, 1999, 2001; D. K. Johnson and P. W. Aasen, J. Minn. Acad. Sci. 55(1), 1989.
Figure 12-10 Long-term trends in effluent concentration of TSS for the Metro plant in St. Paul, Minnesota. Source: Larson, 1999, 2001; D. K. Johnson and P. W. Aasen, J. Minn. Acad. Sci. 55(1), 1989.

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