A method of storing and supplying hydrogen to a hydrogen pipeline comprising: compressing a feed stream of the hydrogen to produce a compressed hydrogen feed stream; injecting the compressed hydrogen feed stream into a salt cavern to produce stored hydrogen within the salt cavern wherein the minimum volume of the hydrogen stored within the salt cavern is maintained at a volume ratio equal to a stored volume of the hydrogen to the actual cavern volume of no less than 29.0 Sm 3 /m 3 (Scf/cf) through at least one conduit and withdrawing a stored hydrogen stream, composed of the stored hydrogen, from the salt cavern through the at least one conduit, the salt cavern having a residual brine layer located at a bottom region of the salt cavern and side regions extending upwardly from the bottom region of the salt cavern and the at least one conduit having at least one lower end located in an interior region of the salt cavern and spaced above the brine layer and from the side regions of the salt cavern; introducing the stored hydrogen stream after having been withdrawn from the salt cavern into the pipeline; maintaining at least a minimum quantity of the stored hydrogen within the salt cavern before, during, and between times at which the compressed hydrogen feed stream is injected and at which the stored hydrogen stream is withdrawn such that a stagnant layer of hydrogen is maintained that borders the interior region and has at least a bottom portion overlying the residual brine layer and a lateral portion situated along the side regions of the salt cavern, the stagnant layer having a carbon dioxide content that is a potential source of carbon dioxide contamination to the stored hydrogen stream; and limiting the flow rates and the velocities such that, as measured at the at least one lower end of the at least one conduit, the compressed hydrogen feed stream is injected at an injection ratio equal to an injection flow rate of the compressed hydrogen feed stream to the actual cavern volume of no greater than 7.5 Sm 3 d/m 3 (Scfd/cf) and at an injection velocity of the compressed hydrogen feed stream of no greater than 30.5 m/s (100 feet per second) and the stored hydrogen stream is withdrawn at a withdrawal ratio equal to the withdrawal flow rate of the stored hydrogen stream to the actual cavern volume of no greater than 10.0 Sm 3 d/m 3 (Scfd/cf) and at a withdrawal velocity of the stored hydrogen stream of no greater than 45.7 m/s (150 feet per second) such that the hydrogen stream is withdrawn from the salt cavern and the carbon dioxide contamination of the stored hydrogen stream is inhibited. compressing a feed stream of the hydrogen to produce a compressed hydrogen feed stream; injecting the compressed hydrogen feed stream into a salt cavern to produce stored hydrogen within the salt cavern wherein the minimum volume of the hydrogen stored within the salt cavern is maintained at a volume ratio equal to a stored volume of the hydrogen to the actual cavern volume of no less than 29.0 Sm 3 /m 3 (Scf/cf) through at least one conduit and withdrawing a stored hydrogen stream, composed of the stored hydrogen, from the salt cavern through the at least one conduit, the salt cavern having a residual brine layer located at a bottom region of the salt cavern and side regions extending upwardly from the bottom region of the salt cavern and the at least one conduit having at least one lower end located in an interior region of the salt cavern and spaced above the brine layer and from the side regions of the salt cavern; introducing the stored hydrogen stream after having been withdrawn from the salt cavern into the pipeline; maintaining at least a minimum quantity of the stored hydrogen within the salt cavern before, during, and between times at which the compressed hydrogen feed stream is injected and at which the stored hydrogen stream is withdrawn such that a stagnant layer of hydrogen is maintained that borders the interior region and has at least a bottom portion overlying the residual brine layer and a lateral portion situated along the side regions of the salt cavern, the stagnant layer having a carbon dioxide content that is a potential source of carbon dioxide contamination to the stored hydrogen stream; and limiting the flow rates and the velocities such that, as measured at the at least one lower end of the at least one conduit, the compressed hydrogen feed stream is injected at an injection ratio equal to an injection flow rate of the compressed hydrogen feed stream to the actual cavern volume of no greater than 7.5 Sm 3 d/m 3 (Scfd/cf) and at an injection velocity of the compressed hydrogen feed stream of no greater than 30.5 m/s (100 feet per second) and the stored hydrogen stream is withdrawn at a withdrawal ratio equal to the withdrawal flow rate of the stored hydrogen stream to the actual cavern volume of no greater than 10.0 Sm 3 d/m 3 (Scfd/cf) and at a withdrawal velocity of the stored hydrogen stream of no greater than 45.7 m/s (150 feet per second) such that the hydrogen stream is withdrawn from the salt cavern and the carbon dioxide contamination of the stored hydrogen stream is inhibited.