Fig. 1. General layout of the field test area (not drawn to scale). White arrows indicate the flow of water from the mixing tank to mini-sprayer, single black arrows indicate flow of water from the riser to the mixing tank, and double black arrows indicate flow in a bypass loop that was used to mix the water in the tank. Refer to Fig. 2 and 3 for enlargements of the sample collection columns and method of compositing.

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