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• Section No 6 <br /> Revision No 1 <br /> Date January 13, 1992 <br /> Page 51 of 55 <br /> A constant rate pumping test will be used to obtain the specific <br /> capacity of a well and the transmissivity and storage values of a given <br /> water-bearing unit This test involves pumping a well at a constant rate and <br /> measuring drawdown levels in the well being pumped and nearby observation <br /> wells The well will be pumped for 24 to 72 hours depending on the type of <br /> aquifer Recovery measurements will be collected from the pumping well and <br /> observation wells after the pump has been shut off <br /> Step drawdown tests will be performed on the pumping well prior to <br /> performing the constant rate test to determine an appropriate pumping rate at <br /> which the constant-rate test should be performed This test involves <br /> increasing the pumping rate at regular intervals and recording the resultant <br /> drawdowns The value of the step drawdown test is that it shows the <br /> reduction in specific capacity with increasing yields <br /> All pumping tests will be performed by the pro3ect geologist who will in <br /> turn be supervised by a Certified Engineering Geologist The necessary <br /> permits for well discharge (if any) will be obtained prior to performing the <br /> test Methods for disposal of discharge water generated will be investigated <br /> and addressed in the work plan for each given task <br /> Water level measurements will be collected for a minimum of 72 hours <br /> prior to the test to ensure static conditions exist Dynamic water levels <br /> will be measured using the data logger/transducer equipment previously <br /> described All equipment will be thoroughly cleaned with steam or a liquinox <br /> soap solution followed by a triple distilled water rinse prior to use Well <br /> pumping data including time, date, weather conditions , drawdown, recovery, <br /> 6-51 <br />