It is illegal to urinate in an elevator.

Listing 10.10.100 Unlawful Bus Conduct. B. A person is guilty of unlawful bus conduct if, while on or in a municipal transit vehicle as defined by RCW 46.04.355, or in or at a municipal transit station as defined in subsection C, and with knowledge that such conduct is prohibited, the person 4. spits or expectorates;…