North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 18 - ENVIRONMENTAL HEALTH › Subchapter C - WATER SUPPLIES › Section .1300 - OPERATION OF PUBLIC WATER SUPPLIES › Section 18C .1303 - FACILITY OVERSIGHT

Current through Register Vol. 39, No. 2, July 15, 2024
(a) Treatment
				  Facility Oversight. At a minimum, the supplier of water shall ensure that
				  during each oversight visit required by this Rule the water system's treatment
				  facility receives a routine visual inspection from the source to the point
				  where water enters the distribution system; equipment settings are adjusted and
				  chemical feed tanks are filled as necessary; dates and quantities of chemicals
				  added are recorded; and the physical and chemical tests required on plant
				  monthly operation reports are performed. In addition, the supplier of water
				  shall have an ORC, or a certified treatment facility operator working under the
				  direction of the ORC, on site as frequently as necessary to ensure compliance
				  with the requirements of this Section and Subchapter. At least one visit per
				  week shall be performed by the ORC for the treatment facility or by an operator
				  with a grade of certification corresponding to or higher than the
				  classification of the facility. The supplier of water shall provide oversight
				  at a public water system treatment facility while the facility is in operation,
				  as follows:
(1) Surface Water or Groundwater
				  Under the Direct Influence (GWUDI) of Surface Water Treatment Facilities.
				  Surface water or GWUDI systems shall provide an operator as required in
				  15A NCAC
				  18D .0206 and shall have the ORC or an
				  operator with a grade of certification corresponding to or higher than the
				  classification of the facility on-site at least 20 percent of the time the
				  facility is in operation, as calculated on a weekly basis.
(2) Ground Water Treatment Facilities. The
				  requirements for ground water treatment facilities are as follows:
(A) Ground water treatment facilities with
				  any individual parameter rating value of 10 or higher as classified by
				  15A NCAC
				  18D .0203 shall be visited by an operator
				  daily.
(B) Ground water treatment
				  facilities with all individual parameter rating values less than 10 as
				  classified
				  15A NCAC
				  18D .0203 shall be visited by an operator as
				  often as necessary to ensure compliance with the requirements of this
				  Subchapter but no less often than denoted in Table B below. For the standard
				  frequency of three times per week, no more than two consecutive days shall pass
				  between operator oversight visits. For the standard frequency of two times per
				  week, no more than three consecutive days shall pass between operator oversight
				  visits.
(3) Supplemental
				  Treatment Facilities. The requirements for supplemental treatment facilities
				  are as follows:
(A) A supplemental treatment
				  facility, including booster chlorination, is a facility designed to treat water
				  that has previously been treated to meet standards of the "North Carolina
				  Drinking Water Act." Supplemental treatment facilities with any individual
				  parameter rating value of 10 or higher as designated by
				  15A NCAC
				  18D .0203 shall be visited by an operator
				  daily.
(B) Supplemental treatment
				  facilities with all individual parameter rating values less than 10 as
				  designated by
				  15A NCAC
				  18D .0203 shall be visited by an operator as
				  often as necessary to ensure compliance with the requirements of this
				  Subchapter but no less often than denoted in Table B below. For the standard
				  frequency of three times per week, no more than two consecutive days shall pass
				  between operator oversight visits. For the standard frequency of two times per
				  week, no more than three consecutive days shall pass between operator oversight
				  visits.
.
Table B: Standard Frequency of Oversight Visits for Ground
					 Water and Supplemental Treatment Facilities
SYSTEM TYPE
Population size
standard frequency of oversight VISITS
Community
> 10,000
>3,300 to 9,999
501 to 3,300
500 or fewer
Daily
Five times per week
Three times per week
Two times per week
Non-transient, non-community
>1,000
1,000 or fewer
Three times per week
Two times per week
Transient, non-community
Any population size
Once per week, unless an ORC is not required by
								15A NCAC
								18D .0206