Appurtenant used in a sentence

Appurtenant in a sentence as an adjective

Facility per square foot is likely the most expensive you'll find due to the appurtenant systems required for air flow and purity, a variety of gas handling systems, ridiculous electrical power systems, possibly gas plant systems, water purification and then treatment systems for both air and fluids exiting the plant. Some truly scary toxins are used and produced and have to be contained or captured and neutralized.