(a)  Special precautions shall be taken to protect the operators from inhaling fluoride dust when handling this chemical and while charging the hoppers of the feeders.

(b)  Dry feeders shall be equipped with dust collectors consisting of bag filters operating under positive air pressure and vented to the outside air.

(c)  Each operator who handles fluoride shall be provided with his individual toxic dust respirator to be used only when handling the chemical.

(d)  When liquid or solution feed equipment is used, special precautions against siphonage and improper chemical mixing must be provided after consultation with and approval by the Department.


History Note:        Authority G.S. 130A‑316;

Eff. February 1, 1976;

Readopted Eff. December 5, 1977;

Amended Eff. September 1, 1990;

Pursuant to G.S. 150B-21.3A, rule is necessary without substantive public interest Eff. November 23, 2015.