A fluid storage container and method is disclosed. The fluid storage container comprises a base frame that supports a tank, a tank for storing fluid, a working surface area walkway built into an end of the tank, a ladder connected near the front of the walkway to the frame, a plurality of handrails on the walkway that can be positioned depending on the required function of the tank, a plurality of strut panels that serve as floorboards on the walkway, a bridge that extends from the left and right sides of the tank to connect to other like tanks, a safety chain that connects between adjacently parked containers, and a dual manifold assembly. A method for configuring the tank's walkways as continuous walkways when parked adjacent to each other is disclosed. A dual manifold system and method for operating the manifolds is also disclosed.