What good condition rules out
On this page11
Good condition is defined by a parenthesis listing three things
No severe rusting, apparent structural defects or deterioration. Each one is a different kind of failure and the three together cover most of how a container ages.
Severe rusting is qualified and that qualification matters
Not no rusting. Severe rusting. A container with surface rust is not automatically out of condition, which is a realistic position for a rule about steel drums in workshops.
Apparent structural defects is qualified in a different way
Apparent. Visible or evident, rather than discovered by testing. The standard is what a competent look reveals, not what a pressure test would.
Deterioration carries no qualifier at all
Which makes it the widest of the three and the one that catches anything the first two miss: perished gaskets, softened plastic, a crazed wall.
And then leaking is given its own numbered paragraph
Not leaking, with the gloss no visible leaks. Separated from the condition list because a container can be in sound condition and still leak at a fitting.
Visible is doing the same work as apparent
The test is what can be seen. A rule that said no leaks would require proof of a negative; a rule that says no visible leaks asks for an inspection and accepts its result.
Taken together the four requirements are a maintenance standard
Which is what makes this section unusual in this library. Every other spine describes a state of affairs at the point of manufacture or sale. This one describes a state that has to persist through use.
And the release paragraph closes that loop
On detecting a release, a generator must stop the release, contain the released used oil, clean up and manage properly the released oil and other materials, and if necessary repair or replace any leaking container or tank.
The fourth step has a condition on the end of it worth noticing
Prior to returning them to service. So a leaking container is not condemned. It is withdrawn, repaired or replaced, and then may come back, which is a posture no other rule here takes.
Four verbs, in order, and the order is the content
Stop, contain, clean up, repair. A sequence rather than a list, and the container question comes last because the spill comes first.