NH Water/Wastewater Operator case studies
NH Water/Wastewater Operator · Put your knowledge to work in context.
The New Hampshire Water/Wastewater Operator credential refers to operator certification overseen by the New Hampshire Department of Environmental Services (NHDES), the state agency whose website hosts water, wastewater, and licensing and certification information. Candidates typically pursue certification to work at community drinking water systems or wastewater treatment and collection facilities in New Hampshire. The NH Water/Wastewater Operator case studies are 5 cases and about 4,408 words.
1Riverside Drive WTP: Filter Upset and a CT Shortfall After a Storm
Riverside Drive Water Treatment Plant is a 1.6 MGD conventional plant (alum coagulation, dual-media filters, free chlorination) serving about 9,000 people from a river source. In 18 hours the watershed receives 3.2 inches of rain.
886 words, about 4 min2Mill Brook WWTF: Wet-Weather Overflow with an Effluent in Exceedance
Mill Brook Wastewater Treatment Facility is a 0.30 MGD extended-aeration activated sludge plant serving 2,300 people, with a 4.5-mile gravity collection system, three lift stations, and an NPDES permit limiting CBOD5 to 25 mg/L and TSS to 30 mg/L as monthly averages, with 85% minimum removal for each. On April 12 a nor'easter drops 1.9 inches of rain in 20 hours.
832 words, about 4 min3Fairview Water Works: Lead Action Level Exceedance and a Corrosive Water Problem
Fairview Water Works serves 2,400 people and collects 20 standard lead and copper tap samples every six months. The most recent round, sorted from lowest to highest lead concentration in mg/L, is: 0.002, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.018, 0.021, 0.024, 0.031, 0.045.
866 words, about 4 min4Cold Spring Mobile Home Park: E. coli Positive, Repeat Positive, and a Well Integrity Problem
Cold Spring Mobile Home Park is a community water system serving 1,150 people year-round from two bedrock wells, chlorinated with sodium hypochlorite and fed to a 40,000-gallon storage tank; there is no other treatment. The system collects two routine total coliform samples per month.
921 words, about 5 min5Elm Street Pump Station: Confined Space Entry Under Schedule Pressure
At the Elm Street pump station, a 12-foot-deep wet well handles two submersible pumps. A contractor is scheduled to pull Pump 1 for a seal replacement, an entry of about 45 minutes.
903 words, about 5 min