DE Water Operator case studies
DE Water Operator · Put your knowledge to work in context.
The Delaware Water Operator Certification is a state credential administered through the Delaware Department of Natural Resources and Environmental Control (DNREC), the agency whose Division of Water oversees drinking water programs in the First State. It is intended for people who operate or want to operate public water systems - treatment plant operators, distribution system personnel, and the supervisors responsible for day-to-day operations. The DE Water Operator case studies are 5 cases and about 4,187 words.
1Coagulation Collapse After a Storm: Same Alum Dose, New Raw Water
A 3.0 MGD conventional surface water plant treats a 900-acre reservoir. On Monday the raw water is 6 NTU, 88 mg/L alkalinity as CaCO3, pH 7.4, and the plant runs 26 mg/L alum with settled turbidity of 1.1 NTU.
812 words, about 4 min2Nitrification in Two Dead-End Cul-de-sacs on a Chloraminated System
A 4,200-connection community system uses chloramines, fed from a 1.0 MG elevated tank and a 0.5 MG standpipe. Ammonia is added at the booster as aqua ammonia to target a 4.5:1 chlorine-to-ammonia weight ratio.
820 words, about 4 min3Rising Chloride in a Coastal Well While the System Asks to Pump More
A community groundwater system draws from three wells in a sand aquifer about 1.8 miles from a tidal river. Well 2 is rated 700 gpm.
858 words, about 4 min4E. coli Positive Repeat: Notice Deadlines and the Assessment
An 800-connection community groundwater system serves about 2,100 people with two wells, continuous free chlorination at 1.2 mg/L, and no treatment other than chlorine. On Monday a routine monthly sample from a residential kitchen tap is total coliform positive and E.
827 words, about 4 min5Chlorine Cylinder Gasket Failure During Change-out
An operator is changing a 150-pound chlorine cylinder at a 2.4 MGD plant. The cylinder room holds four cylinders - two in service, two spare - with a gas detector alarming at 1 ppm, louvered vents high and low, and a door that opens inward.
870 words, about 4 min