According to the EPA , in a typical wetland environment, 38% of the water is outflow; 47% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem.  (EPA 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, 64.1; seepage, 75.8; remaining due to evaporation, 23.9; in the water volume, 68.2.

Find the mean chlorine compound concentration (mg/l) for this ecological system.

State the answer only and no additional work.  Do not label the answer.

Do not round the final answer.

Hint:  Find the weighted mean.