85. Every permit holder carrying on an activity under section 70.9 of the Environment Quality Act (chapter Q-2) shall protect, by means of an intrusion detection system, every building storing more than 45,000 kg of one of the categories of materials listed in subparagraphs 1 to 5 or more than 45,000 kg of several categories listed in subparagraphs 1 to 6:1° explosive materials;
2° gaseous materials;
3° flammable materials;
4° oxidizing materials;
5° materials having more than 1,500 mg/kg of total organic halogen; and
6° liquids containing PCBs.
Where the storage is outside a building, the permit holder shall protect the storage site with an intrusion detection system.