Recovery data shall be collected at the same frequency and level of accuracy for a period of time sufficient to allow the water level in the pumping well to recover at least 80% of the total drawdown.Ħ. 1 ft) at logarithmic time intervals and maintaining a constant pumping rate within +/- 10% of the average value. This will be accomplished by collecting reasonably accurate data to (+/- 0.
The drawdown data shall be collected in a manner that will allow the transmissivity, storage coefficient, and anisotropy conditions of the aquifer to be determined from the pump test data. The minimum rate shall be measured at least on an hourly basis and shall be held constant within +/- 10% for the duration of the test.ĥ. The well should be pumped at a constant rate for a minimum test duration of 12 hours while water levels are measured in the production well and in a minimum of three surrounding private wells open to the same aquifer. The pumping test shall be conducted with a test well or production well at the exact location of the permanent well and open to the same stratigraphic material as the permanent well. The developer of all wells covered by this ordinance is required to conduct a pumping test at the design capacity of the production well. General aquifer characteristics should be defined by presenting a map of the existing water table and identification of the geologic unit(s) supplying water.Ĥ. The developer shall supply an inventory of wells within a radius of 1,000 feet of the proposed development as provided by state well construction reports showing the depth and water levels of existing wells. serving at least 15 service connections or regularly serving at least 25 individuals daily at least sixty days out of the year), or wells intended to supply commercial, industrial, or irrigation uses.ģ. This ordinance shall apply to wells intended to supply new public water systems as defined in Chapter 811.01(21) (i.e.
#4 hour well drawdown test code#
Well and pump installation must meet the requirements of Chapter NR812 of the Wisconsin Administrative Code and a constructor's report is on file with the Department of Natural Resources.Ģ. NOW, THEREFORE, The Village Board of the Village of Thiensville, Ozaukee County, Wisconsin, do ordain as follows:Ĭhapter 78, Article II, Division 3 WELL TESTING, Section 78-55 of the Municipal Code of Ordinances of the Village of Thiensville is hereby created to read as follows.
WHEREAS, the magnitude and extent of the impact cannot be accurately predicted without a properly controlled pumping test, WHEREAS, a new well has the potential to impact existing wells if the pumps are set close to the normal pumping level of the wells and WHEREAS, the Village of Thiensville is totally dependent upon ground water and AN ORDINANCE REGULATING THE TESTING OF WELLS FOR NEW DEVELOPMENTS
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