design tank codes:10'-0"x0'-0" max size, making all tanks as close as same size as possible, have to have sloped plate at 1/4 x12. flat plate not crimp plate so it have to have vertical reinforcement, 2 manways at front bottom wall and on roof top. one point lift, all made out of stainless steel, vent cut out the angles roof framing to avoid trap gasses fromchemical, tanks A and B attached to each other