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The HydraSleeve groundwater sampler can be used to collect a representative sample for most physical and chemical interval (typically within the well screen), without mixing fluid from other intervals.
One or more HydraSleeves are placed within the screened interval of the monitoring well, and a period of time is allocated for the well to re-equilibrate. Hours to months later, the sealed HydraSleeve can be pulled up upon for sample collection. When pulled up upon, Hydrasleeve collects a sample with no drawdown and minimal agitation or displacement of the water column. Once the sampler is full, the one-way reed valve collapses, preventing mixing of extraneous, non-representative fluid during recovery.
Deployment
- A 2-inch empty HydraSleeve, including the weight, only displaces 95 mls. Its shape is streamlined, similar to a ribbon with weight attached to the bottom.
- Dye studies show minimal disturbance to the water column during HydraSleeve placement.
- The HS is flat, empty and sealed shut during placement.
Well Equilibration
- Underwater, the HydraSleeve can remain flat and sealed for indefinite time periods. It will not open until activated by pulling upward for sample collection.
Sample Collection
- When pulled up upon, the HydraSleeve collects a sample from a very defined interval in the well with minimal agitation and no displacement. When full it seals itself, isolating the sample from extraneous fluid from other zones. HydraSleeve provides a simple method for collecting a water sample from a defined vertical and horizontal interval within the well.
- Dye studies show that bailers, including dual check valve bailers, will not retain a sample from a specified interval.
Any change in recovery speed results in the momentum of the sample in the bailer to continue upward and out of the top.
Sample Discharge
- The pointed discharge tube and flexible HydraSleeve body allows discharge flow rates to be easily controlled. The flexible sleeve collapses as sample is withdrawn, preventing air from contacting the sample in the HydraSleeve.
Shipping
- HydraSleeves are flexible and light. Large volumes of HydraSleeves can be shipped in small, lightweight parcels.
Disposal
- Used HydraSleeves can be easily rolled or compressed to minimize disposal volume.
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