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Fig. 8. The plume of toluene after 1, 7, 10, and 15 d (the profile is the same as in Fig. 2). Application continued until Day 14 as indicated by the half circle at the top of the graphs. The size of this half circle is proportional to 16 mg L-1 toluene. The sizes of the other circles are proportional to the percentage of this concentration measured in each suction cup. The dots represent suction cups. The local coordinate system uses the southeastern corner of the lysimeter trench as the point of origin.
