15A N.C. Admin. Code 18C.0703

Current through Register Vol. 39, No. 13, January 2, 2025

Section 18C .0703 - MECHANICAL FLOCCULATION

(a) Basin Inlet and Outlet. The design of inlets and outlets of flocculation basins shall prevent short circuiting of the water and destruction or deterioration of the floc.

(b) Detention Period. The flocculation basins shall have a theoretical detention period of not less than 30 minutes.

(c) Agitator Control. The agitators of flocculation basins shall be equipped with variable speed controls.

(d) Paddles. Peripheral speed and paddle configuration shall be designed to obtain optimum velocity gradient.

15A N.C. Admin. Code 18C .0703

Authority G.S. 130A-315; 130A-317; P.L. 93-523;
Eff. January 1, 1977;
Readopted Eff. December 5, 1977;
Amended Eff. July 1, 1994;
Pursuant to G.S. 150B-21.3A, rule is necessary without substantive public interest Eff. November 23, 2015;
Amended Eff. July 1, 2019.

Authority G.S. 130A-315; 130A-317; P.L. 93-523;
Eff. 1/1/1977;
Readopted Eff. 12/5/1977;
Amended Eff. 7/1/1994.

Amended by North Carolina Register Volume 34, Issue 03, August 1, 2019 effective 7/1/2019.