15A NCAC 18C .1529       POINT‑OF‑ENTRY AND OTHER TREATMENT DEVICES

(a)  Public water systems may use point‑of‑entry devices to comply with maximum contaminant levels only if they meet the requirements of this Rule.

(b)  The water supplier shall operate and maintain the point‑of‑entry treatment system.

(c)  The water supplier shall develop a monitoring plan and obtain department approval of the plan before point‑of‑entry devices are installed for compliance.  The approved plan shall provide health protection equivalent to central water treatment.  "Equivalent" means that the water would meet all maximum contaminant levels in this Subchapter and would be of an acceptable quality similar to water distributed by a well operated central treatment plant.  In addition to monitoring for volatile organic chemicals, monitoring shall include physical measurements and observations such as total flow treated and mechanical condition of the treatment equipment.

(d)  Effective technology shall be properly applied under a plan approved by the Department and the microbiological safety of the water must be maintained as follows:

(1)        Certification of performance, field testing, and, if not included in the certification process, an engineering design review of the point‑of‑entry devices shall be provided; and

(2)        The tendency for increase in heterotrophic bacteria concentrations in water treated with activated carbon shall be considered in the design and application of the point‑of‑entry devices.  Frequent backwashing, post‑contactor disinfection, and Heterotrophic Plate Count monitoring shall be used when necessary to ensure that the microbiological safety of the water is not compromised.

(e)  Every building connected to the system shall have a point‑of‑entry device installed, maintained, and adequately monitored.  The rights and responsibilities of the public water system consumer shall be conveyed with title upon sale of property.

(f)  Public water systems shall not use bottled water or point‑of‑use devices to achieve compliance with a maximum contaminant level.  Bottled water or point‑of‑use devices may be used on a temporary basis to avoid an unreasonable risk to health.

 

History Note:        Authority G.S. 130A‑315; P.L. 93‑523; 40 C.F.R. 141;

Eff. June 1, 1988;

Transferred and Recodified from 10 NCAC 10D .1641 Eff. April 4, 1990;

Amended Eff. September 1, 1990.