Sampling
PORTABLE OIL FREE AIR COMPRESSORS
Lift, flow rate and reliability of a ground water sampling system require a dependable, practically designed and
portable compressed air source. GeoPump air compressors are capable of producing lifts of up to 330 feet and displace sufficient air to provide the highest pumping rates in the industry. All GeoPump compressors are oil free, providing instrument grade air that contains no hydrocarbon in the air stream. GeoPump compressors have earned the reputation as rugged, low maintenance, high performing, portable compressed air sources for pneumatic pumping systems (well development or sampling).
WELL PURGING / DEVELOPMENT / PURGE PUMPS
GeoPump purge pumps are often added to the basic dedicated bladder pump system to increase the purging flow rate and decrease field time. Purge pumps offer flow rates up to 3.5 times higher than a conventional bladder pump alone which significantly reduces field costs over the
life of a monitoring program. When used portably and fitted with development swabs, the pump can be surged within the well to dissolve the mud cake around the screened area.
PURGE PACKERS
GeoPump Packers are designed to provide a leak proof seal between the well casing and the open or screened interval. The packers are installed on the bladder pump tubing such that the pump is in the sampling zone and the
packer is in the casing immediately above. Between sampling events, the packer is deflated to permit the water level in the well to equalize with the water table. Prior to purging the packer is inflated, thus reducing the volume that must be removed before the sample is collected.
SHALLOW WELL SAMPLER
The Model 5750 Shallow Well Sampler is a portable, peristaltic pump with a maximum lift capability of 26 feet. This pump is ideal for purging shallow monitoring wells, cleaning GeoPump bladder pumps and tubing assemblies and a variety of applications where it is necessary to move small volumes of liquid. The medical grade silicone tubing is the only pump component that comes in contact with the liquid. The unit requires 12 VDC power which is supplied by an optional 6 Amp-hour 12 VDC rechargeable gel cell battery, 115 VAC/12 VDC power converter, or 12 VDC power cords for connection to a vehicle battery or lighter socket. It is equipped with a three position power switch which allows it to operate in either the forward (suction) or reverse (purge) modes. Also included is a speed controller, which varies the pumping rate. The unit is housed in a rugged ABS housing.
WELL DEVELOPMENT SWABS
Proper and complete well development is now recognized
as a crucial component of monitoring well installation. GeoPump Well Development Swabs offer a simple, effective and convenient way to accomplish this important task. Development swabs are typically used in conjunction with GeoPump gas-drive pumps simply by attaching the swab assembly to the threaded intake of the pump. This effectively increases the diameter of the pump to enable the user to produce the proper surging action within the open interval of the well. When the pump is surged up and down within the well, the backwash effect that is created causes fines to migrate into the well and then be pumped to the surface simultaneously.
TUBING ASSEMBLY OPTIONS
GeoPump offers a variety of tubing options in twin bonded configurations. Material options of polyethylene, Teflon ® lined polyethylene, or pure Teflon® provide economy and chemical inertness. Bonded tubing eliminates the potential of interference with portable static water level measurement probes
