For the ladder, you can follow this:
Key things: Don't forget bonding the anchors back to the grid, ensure proper drainage holes for the anchor (meaning don't block the drain hole with concrete), and follow the right setback for the product you have chosen. In terms of the dimensions of the pad, unlike dive boards ladders / rails are simpler -- just like a footing for a post. So I would give at least 1 to 1.5 feet on either side of anchor, and at least 18" (36" x 18").
Sorry to say that the plumbing work for electrical looks pretty bad -- was this actually done by a pro? It should be a pretty simple SCH80, heat-bended without any joints rising up to a J-box.. I am also not sure if pressure testing conduit is a norm -- mostly we avoid any joints till the J-box, and main leak area is near niche. I suggest getting some pro help in solving this.