Suppose youve learned of a nonaqueous phase liquid present in the subsurface and that

60% (v:v) of the NAPL is 1,2-dichlorobenzene, 25% is benzene, and the remainder is toluene.

(a) At what concentration would you expect to find each of these constituents at in the groundwater immediately surrounding the NAPL spill?

(b) Describe the temporal variability in those groundwater concentrations as groundwater flow continues to move through this subsurface area.