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SOP-012 Standard Operating Procedure Aquifer Testing Page 10 of 18 REVISION NO. 0 March 2020 Sharpe Army Depot project work plans will outline the type of equipment to be used. This step may be skipped if the specific capacity testing is to be conducted immediately after development using the development equipment. • All measuring and testing 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 utilized without verification of calibration certification. • Decontaminate all downhole equipment according to SOP No.003. If specific capacity testing is to be conducted immediately after development using the same equipment, and the equipment has not been removed from the well site, then the equipment may not have to be decontaminated for the testing. • In the event that the contaminant histories are known or suspected for the wells to be tested, the tests may then be performed, starting with the least contaminated and ending with the most contaminated. This will reduce the potential for cross-contamination between wells. • Visually inspect and access the well per SOP No. 008. • Obtain a water level depth measurement and sound the bottom of the well according to the procedures outlined in SOP No. 008. Compare the measured total depth to the bottom of the well to the well construction diagram to determine if sediment is at the bottom of the well. • Install the mechanical pump in the well using the manufacturer's instructions. Place the pump in the well so that the pump intake is near the bottom of the well screen or location of water entry into the well. Lower the pump inside the pumping well to a depth below the bottom of the anticipated drawdown. Note the height of the water column from the static water level to the pump motor housing and intake. Record all information on the appropriate form as specified by the project work plans. During testing, the drawdown should not be so great as to cause the pump to cavitate. • Immediately prior to turning on the pump, physically measure the water level in the well. Start the mechanical pump and adjust the valve or flow regulator to maintain a constant discharge specified by the project work plan, or as determined from the well development records. It is advisable that the discharge rate be sufficient to maintain a stabilized sustainable drawdown of at least 0.1 feet. Record the time of the start of the specific capacity test on forms specified in the project work plans. • Once pumping starts, physically measure the water level decline with the electric well tape (or equivalent) as directed at time intervals specified by the project work