Abstract: A sampling port system for providing a self-sealing access port for the extraction of liquid or gas samples from a container. The sampling port system includes a housing having a threaded lumen, at least one sealing structure threadably positionable within the threaded lumen, and a plug threadably positionable within the threaded lumen above the sealing structure. The housing is preferably positioned within an existing threaded port within the container.

Abstract: Vent filters for containers such as barrels which contain hazardous waste, such as transuranic (nuclear) waste, include a bore therethrough which does not intersect the material of carbon-to-carbon filter media inserts disposed within the vent filter. Each of the bores has a stainless steel tube disposed therein wherein the stainless steel tube has at an interior end a septa-type seal and at an outer end an impenetrable plug. In order to sample head gases, a syringe is used with a needle that penetrates the septa-type seal. After the needle is withdrawn, the septa-type seal closes and the impenetrable plug is replaced.