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Page 1 of 9 <br />SOF NUMBER 0.0 Pump Testing <br />1.0 PURPOSE AND SCOPE <br />Pumping tests may be conducted to estimate extent of capture of extraction wells, assess <br />influences of faults on groundwater flow, assess communication between upper and lower <br />aquifer units, and estimate aquifer transmissivity, hydraulic conductivity, and specific yield <br />and /or storativity. <br />Piunping tests would consist of a.10 -hour step- discharge test to estimate the optimum pumping <br />rate for the well, a minimum 24 -hour to maximum 72 -hour constant -rate test (conducted at the <br />rate selected from the step- discharge test), and a minimum. 12 -hour recovery test. <br />Following testing, water level data will be analyzed using standard aquifer test analysis methods. <br />The methods used will be carefully selected to best fit aquifer conditions and meet the method <br />assumptions. The following outlines procedures for conducting the pumping tests, collecting <br />data and data analysis. <br />2.0 PUMPING TEST IMPLEMENTATION <br />2.1 Pumping Test Set -Up <br />The pumping well and selected observation wells will be equipped with pressure transducers, <br />which will comrect to a Hermit 3000 data logger. The discharge line will be fitted with an in- <br />line flow meter capable of both instantaneous and totalized flow measurement. Withdrawn <br />groundwater will be routed directly to the tailings pond. A variable speed electrical submersible <br />pump, powered by a generator capable of producing the required power for the pump, will be <br />used and sized to handle the maximum anticipated flow rate at the maximum anticipated <br />pumping water level. All drop pipe and discharge lines will also be sized to accommodate the <br />maximum anticipated flow rate. A ball or butterfly valve may also be used to control the pump <br />discharge rate. <br />During test setup, the field crew will verify that all the necessary equipment is available or will <br />be available by the anticipated start of the step - discharge test. The following is a list of <br />equipment and materials anticipated for use during the pumping tests: <br />• Pressure transducers rated to the anticipated pressures (i.e., water level submergence) for the <br />pumping well and selected monitoring /observation wells, and a Hermit 3000 data logger <br />Electronic water level meters of sufficient length <br />• Synchronized watches for observers <br />• Semilog three -cycle graph paper, rulers, pencils, and forms for recording water level <br />measurements <br />• Aquifer Test Data Form (Appendix 1) <br />• Laptop computer with spreadsheet and pumping test analysis software <br />• Appropriately sized submersible pump, polyethylene discharge pipe, ball /gate valves, flow <br />meter, and generator <br />0 -1 <br />