HOW IT WORKS
The HydraSleeve consists of three basic parts - a reusable weight, a long, flexible sample sleeve (usually a polyethylene tube creased to lay flat), and a check valve. The bottom of the flexible tube is sealed and the weight is attached to it. A top-loading check valve assembly includes an attachment point for the suspension line.

HydraSleeve passive ground water sampler use is simple and can be performed by one person. The no-purge sampler is lowered into the well; after the water column returns to equilibrium, the HydraSleeve is recovered with no mixing from the overlying water in the well.


How to use the Hydrasleeve:

	1. Sampler Placement The reusable weight is attached and the HydraSleeve is lowered and placed at the desired position in the well screen. In-situ water pressure keeps the sleeve collapsed and check valve closed, preventing water from entering the sampler. Well is allowed to return to equilibrium.
	2. Sample Collection The check valve opens to allow filling when the sampler is moved upward faster than 1 foot per second, either in one continuous upward pull or by cycling the sampler up and down to sample a shorter interval. There is no change in water level, and minimal agitation during collection.
	3. Sample Retrieval When the flexible sleeve is full, the check valve closes and the sampler can be recovered without entry of extraneous overlying fluids. Samples are removed by puncturing the sleeve with the pointed discharge tube and draining the contents into sample containers or field filtration equipment.

See the Hydrasleeve Field Manual HydraSleeve Field Manual