California Code
ARTICLE 3 - Mobile Water and Wastewater Tanks
Section 114227.

114227. A filter that does not pass oil or oil vapors shall be installed in the air supply line between the compressor and potable water system when compressed air is used to pressurize the water tank system.

(Added by Stats. 2006, Ch. 23, Sec. 2. Effective January 1, 2007. Operative July 1, 2007, by Sec. 3 of Ch. 23.)