SR0084051 (4) - Laserfiche WebLink

Home Browse Search

SOP-012 Standard Operating Procedure Aquifer Testing Page 16 of 18 REVISION NO. 0 March 2020 Sharpe Army Depot • If any transducer cables are run across traffic areas, they must be appropriately protected. Data loggers should also be placed in a secure location to prevent tampering. • Turn on the pressure transducers and data loggers, set the recording frequencies for pre-test monitoring to that specified by the project work plans. It is also important before initiating pre-test monitoring for the pumping test to ensure that water levels from any previous step-drawdown testing have completely recovered. • Physically measure the water levels in the pumping and observation wells with the electric tape and record along with the time. Separate data sheets should be used for each well. • Commence pre-test monitoring with the pressure transducers and data loggers. The total length of time over which the pre-test measurements are made will be provided in the project work plans. Generally, water levels are recorded for a period before the pumping test that is at least as long as the time expected for the pumping and recovery period. Record the information, including times of measurements, on the appropriate form as specified by the project work plans. • Once the pre-test monitoring period is ended, remeasure the water levels in the wells using the electric tape and record along with the time. • Change the recording frequencies in the data loggers for the pumping test as required by the project work plans. Just before starting the pump, begin recording the pressure transducer measurements. • Start the mechanical pump and adjust the valve or flow regulator to maintain a constant rate of discharge as determined from the step-drawdown test and/or specified by the project work plans. Record pump start time on the appropriate form. • Continue to monitor water levels during pumping with the pressure transducers and data loggers, taking periodic water level measurements in each of the wells with the electric tape. Data logger and tape readings should be conducted in accordance with the schedule outlined in the project work plans. However, the water level data should be evaluated during the test and, if necessary, the recording frequencies of the data loggers adjusted. • Observe and record the wellhead flow meter readings as required by the project work plans. • The project geologist or designee will determine the time that the mechanical pump should be shut down as specified in the project work plans and/or based on review