Abstract: A new lift check valve and groundwater sampling device using same is disclosed. The inventive device includes a body having a fluid flow bore extending therethrough and a first body end. A valve stem is sealingly disposed within the fluid flow bore and includes a first fluid flow bore extending from a first end and terminating at a disk integrally formed at a second end. The valve stem further includes a transverse bore extending therethrough in fluid flow communication with the first fluid flow bore and is moveable within the fluid flow bore between a first position in which the transverse bore is disposed without the fluid flow bore for fluid flow therethrough and a second position in which the transverse bore is disposed within the fluid flow bore to close off fluid flow through the fluid flow bore.

Abstract: A device disposed within a monitoring well in a fuel filling station environmental area to collect for withdrawal from said well fuel leakage from reservoir or storage tanks present in the area.