"Significant industrial user (SIU)" means "significant industrial user" as defined in 40 CFR 403.3(v), as reprinted in Appendix C.
N.H. Admin. Code § Env-Wq 1202.64
#8235, eff 12-22-04 (See Revision Note at chapter heading for Env-Wq 1200) (formerly Env-Ws 1202.64); ss by #9798-A, eff 10-9-10 (from Env-Wq 1202.63)