15A NCAC 02U .0401. DESIGN CRITERIA FOR WASTEWATER TREATMENT FACILITIES - CONJUNCTIVE SYSTEMS

(a)  The requirements in this Rule apply to all new and expanding conjunctive facilities, as applicable.

(b)  Continuous on-line monitoring and recording for turbidity or particle count and flow shall be provided prior to storage, distribution or utilization.

(c)  Effluent from the treatment facility shall not be discharged to the storage, distribution or utilization system if either the turbidity exceeds 10 NTUs or if the permitted pathogen levels cannot be met.  The facility shall have the ability to utilize alternate wastewater management options when the effluent quality is not sufficient.

(d)  An automatically activated standby power source or other means to prevent improperly treated wastewater from entering the storage, distribution or utilization system shall be provided.

(e)  The permit shall require an operator certified by the Water Pollution Control System Operators Certification Commission (WPCSOCC) of a grade equivalent or greater than the facility classification to be on call 24 hours per day.

(f)  No storage facilities are required as long as it can be demonstrated that other permitted means of disposal are available if 100 percent of the reclaimed water cannot be utilized.  When provided, storage basins shall meet the design requirements in Rule .0402(g) of this Section.

(g)  Reclaimed water irrigation system design shall not exceed the recommended precipitation rates in the soils report prepared pursuant to Rule .0201 of this Subchapter.  Single family residential irrigation systems and commercial (non-residential) irrigation systems less than one acre in size that are permitted by regulation under Rule .0113(8) of this Subchapter do not require preparation of a soils report.

(h)  Type 2 reclaimed water treatment facilities shall provide dual disinfection systems containing UV disinfection and chlorination or equivalent dual disinfection processes to meet pathogen control requirements.

(i)  Type 2 reclaimed water treatment facilities shall provide documentation that the combined treatment and disinfection processes are capable of the following:

(1)           log 6 or greater reduction of E. coli;

(2)           log 5 or greater reduction of Coliphage; and

(3)           log 4 or greater reduction of Clostridium perfringens.

 

History Note:        Authority G.S. 143-215.1; 143-215.3(a);

Eff. June 18, 2011.