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SOP-012 Standard Operating Procedure <br />Aquifer Testing Page 17 of 18 <br />REVISION NO. 0 <br />March 2020 <br /> <br />Sharpe Army Depot <br /> <br />of field generated drawdown versus time plots from the pumping and observation wells. <br />• Once the pumping phase is completed, re-set the data loggers for the recovery period recording duration and frequencies as specified in the project work plans. Obtain a water level measurement in each of the wells with the electric well tape and record the measurements and times. Shut down the mechanical pump. Record the time that the pump was shut down on the appropriate form. <br />• Continue to record the water level recovery in the wells with the pressure transducers and data loggers as long as is required by the project work plans or until the water levels have recovered to within 90 percent of the level expected from the pre-test trends. Also, continue to take physical water level measurements periodically during recovery. Once the recovery period is ended, take a physical water level measurement in each well at the end of the test. Enter the measurements and times on the appropriate form. <br />• The project work plans may require additional depth to water measurements to be physically taken following complete well recovery in order to monitor post-test trends in water level. The project work plans will specify the frequency of measurements, and the length of time that the measurements must be taken. <br />• The data should be reviewed in the field to help ensure the validity of the test. Complete all documentation on the appropriate form as outlined in the project work plans. <br />• Once the pumping test is satisfactorily completed for the wells, all downhole equipment may be removed and the wellheads secured. <br /> Records <br />Records generated as a result of this SOP will be maintained in the Project Records file.