Additional Details
Materials
AquaClear PVC is recommended when dealing with metals and need more durability and weight than a traditional polyethylene bailer.
Polyethylene (HDPE) is also recommended when sampling groundwater for metals, and is perfect for most applications.
Check Valves
Single check groundwater bailers have only one check valve at the bottom to retain the sample during retrieval.
Double check groundwater bailers have an additional check valve at the top to eliminate sample contamination during retrieval when sampling at a specific depth (point source sampling.)
Weights
The weights are used to facilitate a more rapid sink rate to decrease overall time required to collect a groundwater sample.