MN Well Driller case studies
MN Well Driller · Put your knowledge to work in context.
The Minnesota Well Driller credential is a state licensure for people who construct, seal, and abandon water wells in Minnesota. It is aimed at drilling contractors and field drillers who need to demonstrate they can build wells that protect groundwater and public health. The MN Well Driller case studies are 5 cases and about 2,609 words.
1Grout Volume and Lost Circulation in a Till-to-Sandstone Well
A contractor is drilling a residential well with 6-inch-diameter PVC casing in glacial till over fractured sandstone. The borehole is 8 inches in diameter to 140 ft, and the casing is set to 120 ft.
521 words, about 3 min2Sealing a Flowing Abandoned Well with Gravel Pack
A property owner has an abandoned 4-inch steel-cased well, 85 ft deep, with an open annular space and a gravel pack. The well flows at about 2 gpm at land surface, and the casing stands 6 inches above grade.
506 words, about 3 min3Existing Driven Well Proposed for a New House
A homeowner proposes to use an existing 2-inch driven well as the permanent water supply for a new house. The well is 28 ft deep, has 12 ft of casing, no grout, and is 8 ft from the garage foundation, 18 ft from the property line, and 45 ft from the septic system drainfield.
540 words, about 3 min4Arsenic and Nitrate Results from a Treated Tap Sample
A new well in north-central Minnesota is sampled 3 days after disinfection. The sample is collected from the kitchen tap after the water softener and carbon filter.
505 words, about 3 min5Disinfection Dose and Invalid Bacteria Sample After Construction
A 6-inch PVC well is 180 ft deep with casing to 160 ft and static water level at 60 ft; the open hole below casing is about 6 inches in diameter. After construction, the crew estimates the well holds 120 gallons and adds 1 gallon of household bleach containing 6% sodium hypochlorite, claiming this gives 50 ppm.
537 words, about 3 min