1. (a) When an operator marks its underground facility, it shall indicate:

   1. (1) The width of the underground facility for all facilities greater than 1 inch nominal diameter;
   2. (2) The specific owner or operator of the underground facility; and
   3. (3) The function of the underground facility.

2. (b) For purposes of En 806.03(a)(3) functions shall be marked by using:

   1. (1) The letter "E" for underground facilities conveying electricity;
   2. (2) The letter "G" for underground facilities conveying gas;
   3. (3) The letters "PP" for underground facilities conveying oil;
   4. (4) The letters "ST" for underground facilities conveying steam;
   5. (5) The letters "CH" for underground facilities conveying chemicals;
   6. (6) The letter "T" for underground facilities containing telephone wires or cable;
   7. (7) The letters "CATV" for underground facilities conveying cable television signals;
   8. (8) The letters "TC" for underground facilities conveying traffic control information or signals;
   9. (9) The letters "FA" for underground facilities conveying fire alarm information or signals;
   10. (10) The letter "W" for underground facilities conveying water;
   11. (11) The letters "RW" for underground facilities conveying reclaimed water;
   12. (12) The letter "S" for underground facilities conveying sewage;
   13. (13) The letters "SS" for underground facilities conveying storm sewage; and
   14. (14) The letters "SD" shall be used for underground facilities used for storm drainage.
3. (c) An operator shall identify with markings any changes in direction or terminations occurring within the immediate area of the proposed excavation with arrows or other appropriate indicators.

Source. #14062, eff 8-21-24