Water Treatment Operator Class I case studies
Water Treatment Operator Class I · Put your knowledge to work in context.
The Water Treatment Operator Class I credential is the state-issued certification that documents a candidate's competence to operate a public drinking water treatment plant at the first level of the state's operator grading ladder. In most states Class I is the entry rung an operator earns before advancing to higher grades, though a handful of states invert the numbering, so confirm where Class I sits with your state's drinking water primacy agency. The Water Treatment Operator Class I case studies are 5 cases and about 5,282 words.
1Filter Runs Collapse After a Storm Event
A 4.0 MGD conventional plant treats a river supply. Raw water turbidity has climbed from 4 to 9 NTU with the first autumn storms; raw pH is 7.9 and total alkalinity is 140 mg/L as CaCO3.
953 words, about 5 min2One Filter Breaks Through Early While the Rest Run Long
A plant has six rapid-rate filters, each 20 ft by 30 ft, with 30 inches of anthracite over 12 inches of sand. Average flow is 6.0 MGD, peak day flow is 8.0 MGD.
920 words, about 5 min3CT Is Short, DBPs Are Close to the Limit, and Ammonia Is in the Water
A groundwater plant chlorinates with gas at a 2.5 MGD peak hourly flow. The clearwell is 20 ft by 40 ft with 10 ft of water depth; the basin has no baffling beyond the inlet and outlet, and the engineer's baffling factor is 0.5.
1,146 words, about 6 min4Nitrification in a Tank That Barely Turns Over
A chloraminated system with 2.4 MG of total storage serves an average demand of 1.4 MGD. The 1.5 MG ground storage tank is filled only during a six-hour nightly pumping period at 2.0 MGD, and the rest of the day the system draws from the tank.
1,145 words, about 6 min5Hypochlorite Feed Drifts After Six Weeks in a Warm Room
A 4.5 MGD plant disinfects with 12.5 percent sodium hypochlorite (specific gravity 1.17) stored in a warm room that reaches about 85 degrees F. The target dose is 2.2 mg/L as Cl2.
1,118 words, about 6 min