"Hazardous substance" means any physical,
chemical, biological or radiological substance or matter which, because
of its quantity, concentration or physical, chemical or infectious
characteristics, may cause or significantly contribute to an increase in
mortality or an increase in serious irreversible or incapacitating
reversible illness, or pose a substantial present or potential hazard to
Source: General Statutes §
53a-61aa, Threatening in the First Degree.