There are a bunch of items and resources in Resident Evil 2 that are completely optional, such as hip pouches that expand your inventory space or ammo for some of your most powerful guns. These are typically hidden inside safes or lockers with letter dial locks. You can find the combinations for these either in memos or even scribbled somewhere on a wall.
Don't count on finding this kind of thing. Some silly people put bombs in there. Our Homeland Security people try to head those things off. In Europe, especially GB, you can't even find a trash can on the sidewalks for the same reason. A worker at the train station told us to just throw it on the floor, the people in the green jackets will pick it up. Really. What a world we live in.
The storage lockers were a “pilot,” the kind of small test that city government frequently uses to test a new or controversial idea. The city offered up the lockers for individuals to use for months-long stretches. At the time, city officials warned that “misuse of the lockers, vandalism, or other unanticipated results,” could force them to cancel the project.