15A NCAC 02T .1605 DESIGN CRITERIA
(a) The infiltration gallery(ies) or injection well(s) must be designed such that the infiltration gallery(ies) or injection well(s) shall not cause or contribute to:
(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); and
(3) a violation of the groundwater standards at the point of 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 (e.g. standby power capability, complete system-off status, or duplicity of system components).
(c) Design shall include a minimum elevation protection of two feet above the 100-year flood elevation.
(d) Flow equalization of at least 25 percent of the facility's permitted hydraulic capacity must be provided for facilities with fluctuations in influent flow which 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.