SR0084051 (4) - Laserfiche WebLink

Home Browse Search

SOP-012 Standard Operating Procedure Aquifer Testing Page 14 of 18 REVISION NO. 0 March 2020 Sharpe Army Depot • Continue to monitor water level decline during the first step with the pressure transducer/data logger, taking periodic water level measurements with the electric tape. Data logger and tape readings should be conducted in accordance with the schedule outlined in the project work plans. As the first step continues, review the water level data and, if necessary, adjust the recording frequency of the data logger. Observe and record the wellhead flow meter readings as required by the project work plans. • Continue pumping and recording water levels and flow meter readings in the first step as long as required by the project work plans. • Once the first step is ended, measure the water level with the electric tape and record depth and time. Adjust the data logger as necessary (based upon a review of data from the first step) or specified in the project work plans for beginning the second step of the test. • Without turning the mechanical pump off, initiate the second step of the test by changing the pumping rate with the valve or flow regulator to the rate specified by the project work plans. • Monitor the water levels and flow meter readings. • Repeat the cycles of changing pumping rate and recording depth of water as often as is required (for each step of the step-drawdown test) by the project work plans. • Once the last step is completed, re-set the data logger for the recovery period measurement duration and frequency as specified in the project work plans. Obtain a water level measurement with the electric well tape and record the measurement and time. Shut down the mechanical pump. Record the time that the pump was shut down on the appropriate form. • Continue to measure and record the water level recovery with the pressure transducer/data logger as long as the project work plans require it or until the water level has 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 ends, take a physical water level measurement at the end of the test. Record the measurement and time on the appropriate form. • The data should be reviewed in the field to help ensure the validity of the test. The field data review may also help determine the discharge rate to be used during the subsequent single or multiple well pumping testing. Complete all documentation on the appropriate form as outlined in the project work plans. • Once the step-drawdown test completed for the well, the equipment may be left in the well for subsequent single or multiple well pumping testing. If the subsequent