Nebraska Groundwater Tech Exam | Actual questions and answers

Nebraska Groundwater Tech Exam | Actual questions and answers Chemigation - Any process whereby chemicals are applied to land or crops in or with water through an on farm irrigation distribution system. How does GW Temp increase as depth increases? - 1°F every 64' How many days to report decommissioning of a well? - 60 days to report to DNR Observation well - A cased well for the purpose of measuring and observing changes in water levels Monitoring well - A cased well for the purpose of determining ground water quality Recovery well - A water well constructed for the purpose of, or in conjunction with, the removal of contamination from an aquifer Sanitary well cap (seal) - a cover fitted to the top of a well casing to seal the opening between the casing and the pump pipe Confined aquifer - A groundwater storage area trapped between two impermeable layers of rock, causing it to be under pressure so when it is penetrated by a well, the water will rise above the top of the aquifer Mainline propeller - A propeller meter consists of a rotating device, a helical-shaped impeller, positioned in the flow stream. When fluid passes through the meter it causes the impeller to spin. The rotational V is proportional to the flow. The register calculates the flow rate by Q=VA Electric tape - Manual Device for measuring water levels. Commonly accurate to 0.01', marked to 1/100'. Most accurate within 200' of LSD. Calibrated against benchmark steel tape. Pros: better than steel tape when there is condensation inside walls, well is pumping, port is small. Cons: harder to calibrate, higher maintenance. Hold thumb nail at MP while lowering and wait for light and sound. Purpose of field blanks - To indicate any possible contamination in handling and/or analysis; Prepared in the field and should come back non-detect