I think you are right, here is Popular Science (December 2002):
"The Element's rubber floors can be hosed down, ...."
https://books.google.ca/books?id=0BvVSP2ugU4C&lpg=PA47&dq=ho...
"The Element's rubber floors can be hosed down, ...."
https://books.google.ca/books?id=0BvVSP2ugU4C&lpg=PA47&dq=ho...
The floors as I recall were tough, rough, bumpy plastic very thick. It was obvious the intention of the vehicle with a flat rear floor in the rear of the vehicle was meant to be used to carry things not just people.