When used in this chapter the following words and phrases shall have the meanings given in this section:
HAZARDOUS OR TOXIC WASTE OR MATERIAL: Any waste or material which because of its quantity, concentration or physical, chemical or infectious characteristics may:
   A.   Cause or significantly contribute to an increase in mortality or an increase in serious irreversible or incapacitating reversible illness; or
   B.   Pose a substantial present or potential hazard to human health or to the environment when improperly treated, stored, transported, disposed of or otherwise managed.
   C.   "Hazardous or toxic waste" means any material or substance designated as a hazardous or toxic substance by the United States of America acting through the environmental protection agency, or any successor agency, section 101 (14) of the comprehensive environmental response, compensation and liability act of 1980, or any material or substance designated as a hazardous or toxic substance by the state of Idaho, acting through the division of environmental quality or any successor agency.
SANITARY LANDFILL: A disposal site where solid wastes, including putrescible wastes, or hazardous wastes, are disposed of on land by placing earth cover thereon.
WELLHEAD: The upper terminal of a well, including adapters, ports, seals, valves and other attachments.
ZONE I: An area extending fifty feet (50') radially from any wellhead supplying potable water to the city water system.
ZONE II: An area extending between the fifty feet (50') designated as zone I and the city impact area.
ZONE III: The city's area of impact. (Ord. 411, 8-14-2002)