N.H. Code Admin. R. Env-Or 302.48
“Significant corrosion” means corrosion evidenced by a shedding or leafing product or scaling, or by pitting corrosion, regardless of whether the corrosion is progressing at the time of discovery.
Source. (See Revision Note at chapter heading for Env-Or 300) #10487, eff 2-7-14; ss by #14094, eff 10-4-24 (formerly Env-Or 302.47)