(a) A new wastewater treatment facility must have color-coded pipes in accordance with subsection (e) of this section.(b) A new wastewater treatment facility must have detectable underground warning tape for each non-metallic underground pipe.(c) An existing wastewater treatment facility must color-code and install detectable underground warning tape for each pipe installed as part of an alteration.(d) A non-potable water pipe must be painted purple and be stenciled "NON-POTABLE WATER, DO NOT DRINK" and "NO BEBA EL AGUA."(e) A wastewater treatment facility design must use the following color-coding for pipes:(1) sludge - brown;(2) natural gas - red;(3) potable water - light blue;(4) chlorine - yellow;(5) sulfur dioxide - lime green with yellow bands;(6) sewage - grey;(7) compressed air - light green;(8) heated water - blue with 6 inch red bands spaced 30 inches apart;(9) power conduit - in compliance with the National Fire Protection Association 70 National Electrical Code®;(10) reclaimed water- purple with black lettering;(11) gray water- purple with yellow writing;(12) instrument air - light green with dark green bands;(13) liquid alum - yellow with orange bands;(14) alum (solution) - yellow with green bands;(15) ferric chloride - brown with red bands;(16) ferric sulfate - brown with yellow bands;(17) polymers - white with green bands;(18) ozone - stainless steel with white bands;(19) raw water - tan; and(20) effluent after clarification - dark green.