Standard guidelines for the design of urban stormwater systems, ASCE/EWRI 45-05 Standard guidelines for the installation of urban stormwater systems, ASCE/EWRI 46-05 ; Standard guidelines for the operation and maintenance of urban stormwater systems, ASCE/EWRI 47-05 (American Society of Civil Engineers, 2006)
"This document uses both the International System of Units (SI) and customary units."