"Volatile organic compound (VOC)" means any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbonates, metallic carbides, and ammonium carbonate, that participates in atmospheric photochemical reactions. The term does not include any organic compound that the administrator of the EPA designates in 40 CFR 51.100(s) as having no or negligible photochemical reactivity.
N.H. Admin. Code § Env-A 4104.66