Where does all the water go? According to the Environmental Protection Agency (E

Question

Where does all the water go? According to the Environmental Protection Agency (EPA), in a typical wetland environment, 37% of the water is outflow; 45% is seepage; 5% evaporates; and 13% remains as water volume in the ecosystem (Reference: United States Environmental Protection Agency Case Studies Report 832-R-93-005). Chloride compounds as residuals from residential areas are a problem for wetlands. Suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 50.2; seepage, 75.3; remaining due to evaporation, 74.0; in the water volume, 68.9.

(a) Compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (Round your answer to one decimal place.)
mg/l

(b) Suppose the EPA has established an average chlorine compound concentration target of no more than 58 mg/l. Does this wetlands system meet the target standard for chlorine compound concentration? (CHOOSE ONE BELOW)

Yes. The average chlorine compound concentration (mg/l) is too high.
Yes. The average chlorine compound concentration (mg/l) is lower than the target.    
No. The average chlorine compound concentration (mg/l) is lower than the target.
No. The average chlorine compound concentration (mg/l) is too high.

Explanation / Answer

Where does all the water go? According to the Environmental Protection Agency (EPA), in a typical wetland environment, 37% of the water is outflow; 45% is seepage; 5% evaporates; and 13% remains as water volume in the ecosystem (Reference: United States Environmental Protection Agency Case Studies Report 832-R-93-005). Chloride compounds as residuals from residential areas are a problem for wetlands. Suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 50.2; seepage, 75.3; remaining due to evaporation, 74.0; in the water volume, 68.9.

(a) Compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (Round your answer to one decimal place.)
mg/l

(b) Suppose the EPA has established an average chlorine compound concentration target of no more than 58 mg/l. Does this wetlands system meet the target standard for chlorine compound concentration? (CHOOSE ONE BELOW)

Yes. The average chlorine compound concentration (mg/l) is too high.
Yes. The average chlorine compound concentration (mg/l) is lower than the target.    
No. The average chlorine compound concentration (mg/l) is lower than the target.
No. The average chlorine compound concentration (mg/l) is too high.

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