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SOP-012 Standard Operating Procedure Aquifer Testing Page 15 of 18 REVISION NO. 0 March 2020 Sharpe Army Depot testing is not conducted, then all downhole equipment may be removed, and the wellhead secured. 3.4.2 Single and Multiple Well Constant Rate Pumping testing The procedures in this section are written as if a multiple-well pumping test is being conducted. However, these procedures are directly applicable to single well testing. The only difference is that testing and measuring equipment is installed only in the pumping well, and water level measurements are also only collected from this well. • Inspect the equipment to be used to ensure that it is in good working order. Equipment used for the pumping testing will vary widely based upon site-specific conditions. The project work plans will outline the type of equipment to be used. • Measuring and test equipment (M&TE) used for field activities will be calibrated by the equipment manufacturer or an approved calibration laboratory using standards that are traceable to the National Institute of Standards and Technology (NIST). Certificates of calibration for M&TE will be obtained from the M&TE supplier and kept in the project files. No M&TE will be used without verification of calibration certification. • Decontaminate all downhole equipment according to SOP No.003. Equipment maintained inside the pumping well from the step-drawdown test and to be used directly for the subsequent pumping test does not need to be re-decontaminated. • Visually inspect and access the wells to be used during the pumping test per SOP No. 008. • Obtain a depth to water level measurement and sound the bottom of each well to be used with the electric tape according to the procedures outlined in SOP No. 008. Compare the measured total depths to the bottom of the wells to their respective construction diagrams to determine if sediment is at the bottom of the wells. • If necessary, install the mechanical pump in the pumping well as described in Section 3.4.1. • If a multiple-well test is being conducted, connect the pressure transducers to their respective data loggers. Install the transducers inside the observation wells at this time. The transducers should be installed at a position inside each well that is below the anticipated water level during maximum drawdown and does not exceed the maximum head limitation. Set up another pressure transducer in an outlying well (outside of the suspected influence of the pumping well) to record station barometric effects, if required. If not already installed from the step-drawdown test, set the pressure transducer inside the pumping well as described in Section 3.4.1. Record the depth(s) of the transducer(s).