15A NCAC 02T .1605      DESIGN CRITERIA

(a)  The infiltration galleries or injection wells shall be designed such that the infiltration galleries or injection wells will not cause or contribute to any of the following:

(1)           the migration of contaminants into previously uncontaminated areas;

(2)           a violation of the groundwater standards at the compliance boundary if discharge is within the compliance boundary of the disposal facility; or

(3)           a violation of the groundwater standards at the point of the discharge if discharge is not within the compliance boundary of the disposal facility.

(b)  There shall be provisions in the operating plan to ensure the quality of the treated effluent and hydraulic control of the system at all times when any portion of the system ceases to function, such as standby power capability, complete system-off status, or duplicity of system components.

(c)  The infiltration galleries and injection wells shall be designed to include elevation protection of two feet above the 100-year flood elevation.

(d)  Flow equalization of 25 percent of the facility's permitted hydraulic capacity shall be provided for facilities with fluctuations in influent flow that may adversely affect the performance of the system.

 

History Note:        Authority G.S. 143-214.2(b); 143-215.1; 143-215.1A;

Eff. September 1, 2006;

Readopted Eff. September 1, 2018.