What type of drawing encompasses the complete area within a plant's boundary lines?

A site plan encompasses the complete area within a plant's boundary lines. It is a detailed representation that shows the layout of the land, including the buildings, structures, landscaping, and all other elements within the property lines. This type of drawing provides essential information relating to the placement and orientation of buildings and facilities in relation to the overall site as well as how they interact with the surrounding environment.

In contrast, a floor plan typically focuses on a specific level within a building, depicting room layouts, partitions, doors, and other internal features rather than the entirety of the land area. Elevation drawings provide a view of the building's facade from one side, showing details of the height and appearance of exterior walls, but do not represent the overall site or its boundaries. Detail drawings emphasize specific components or assemblies within a larger construction project, providing intricate information about a particular aspect but not the overall site layout. Thus, the site plan is the correct choice for representing the complete area within the boundaries of a plant's site.