3.10. A lake (volume = 10 x 106 m², water residence time = 2 months) is located adjacent to a railway line that carries

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3 10 A Lake Volume 10 X 106 M Water Residence Time 2 Months Is Located Adjacent To A Railway Line That Carries 1 (190.63 KiB) Viewed 30 times

3.10. A lake (volume = 10 x 106 m², water residence time = 2 months) is located adjacent to a railway line that carries considerable traffic of chemicals. You are hired as a con- sultant to provide insight into potential spills into the lake. If the lake is assumed to be completely mixed, a spill would be distributed instantaneously throughout the volume. Therefore the resulting concentration would be co = m/V, where m is the mass of pol- lutant that is spilled. Thereafter the lake's response would follow the general solution. (a) Develop a plot of t75, t9s, and t99 versus pollutant half life. Use logarithmic scales where you believe they would be helpful. (b) Include a short “user's manual” for the plot to provide managers with guidance for its use and interpretation.