Solids going over the clarifier weir usually are not a clarifier problem. Field notes on the three quite different things a thirty-minute jar test separates, and the order we work through them.
White billowy foam and thick brown foam look alike in a photograph and mean opposite things. Field notes on what we found underneath each one, and the order we work through it.
Field notes on what a sewage treatment plant operator actually does, why plants fail weeks after a good operator resigns, and how to tell an operator problem from a design problem.
