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- Tried to lower sludge in lamella tank to collect data at different heights. Drained tank every 5-10 minutes for 3 hours, for as long as very dirty water came out as each time. Sludge blanket did not budge. Took data for both tanks anyway. Measured average turbidity about between 4.8 and 5.5 for all sets of measurements. For lamella tank, took data before trying to lower tanks, and after skimming flocs and dirt off top and trying to lower.
- Noticed that turbidity in non-lamella tank lowered after being left undisturbed. Average after some settling was just under 5.0.
- Skimmed flocs and dirt off the top of the free surface in the lamella tank, after which the turbidity in the tank began to decrease. Since the turbidity was dropping when Shaina left the plant, she set up the data log to record the turbidity every 10 minutes until someone else visits the plant.
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