Specifications include, but are not limited to: Test pumping equipment shall be furnished which consists of a deep well turbine type pump capable of pumping up to 600 gallons per minute. A satisfactory throttling device (or variable frequency drive) shall be provided so that the discharge may be reduced to as little as 50 gallons per minute. If directed by the Engineer, a long tail piece shall be added to the suction end of the turbine pumping system so as to effectively lower the point at which the pump intake is situated in the well. All exposed drive shafts or other high-speed equipment shall be enclosed to protect personnel from injury due to accidental contact or failure of the equipment. A centrifugal sand separating meter shall be used to measure the rate of sand production during well development and performance pump testing.