North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 18 - ENVIRONMENTAL HEALTH › Subchapter D - WATER TREATMENT FACILITY OPERATORS › Section .0200 - QUALIFICATION OF APPLICANTS AND CLASSIFICATION OF FACILITIES › Section 18D .0203 - RATING VALUES TO DETERMINE VARIOUS CLASSES OF CERTIFICATION

Current through Register Vol. 39, No. 2, July 15, 2024
The designation of public water system treatment
					 classifications shall be based on the following rating values:
PARAMETER
RATING VALUE
(1) Surface Water Source
(a) flowing stream
5
(b) flowing stream with
								  impoundment
7
(c) raw water treatment
3
(2) Ground Water Source
(a) first five wells
5
(b) add 1 point per 5 wells or fraction thereof
								  over 5
1
(3) Coagulation
(a) aluminum sulfate, ferric
								  chloride
10
(b) polymer
5
(4) Mixing
(a) baffle
2
(b) mechanical
4
(c) air
3
(5) Oxidation (pre-treatment)
(a)
								  C1202
5
(b) ozone
5
(c) KMn04
3
(d) C12
3
(6) Carbon Treatment
2
(7) Aeration
(a) mechanical draft
3
(b) coke tray or splash tray
2
(c) diffused
3
(d) packed tower (VOC reduction)
10
(8) pH Adjustment (primary)
(a) caustic (NaOH)
10
(b) lime or soda ash
3
(c) acid
10
(9) Sedimentation
(a) standard rate
5
(b) tube settlers
3
(c) upflow
8
(d) pulsators and plates
5
(10) Contact Tank
1
(11) Filtration
(a) pressure
(i) sand or anthracite
8
(ii) synthetic media (birm)
8
(iii) granular activated carbon
								  (GAC)
9
(b) gravity
(i) sand
10
(ii) anthracite (mixed) or GAC
12
(iii) with surface wash or air
								  scour
2
(c) membrane
10
(12) Ion Exchange
(a) softener, Na cycle
5
(b) softener, H cycle
7
(c) Fe and Mn (greensand)
9
(d) mixed bed or split stream
9
(13) Lime Softening
(a) spiractors
10
(b) clarifier with coagulation
12
(c) fuel burner (recarbonation)
5
(14) Phosphate (sequestering
								  agent)
5
(15) Stabilization
(a) acid feed
10
(b) phosphate
2
(c) caustic (NaOH)
10
(d) lime or soda ash
3
(e) contact units
5
(16) Reverse Osmosis,
								  Electrodialysis
15
(17) Disinfection
(a) gas
								  C12
10
(b) hypochlorite solution
7
(c)
								  C1202(sodium chlorite and
								  C12)
13
(d) ozone
13
(e) ammonia and
								  C12
12
(f) ultraviolet light (uv)
5
(18) Fluoridation
(a) saturator
8
(b) dry feed
8
(c) solution (acid)
10
(19) Pumping
(a) raw
3
(b) intermediate
1
(c) finished
3
(d) system booster
2
(20) Storage
(a) raw
1
(b) treated ground level tank
1
(c) elevated in system (each extra tank 1
								  point)
2
(d) hydropneumatic
2
(21) Population Served 1 point per 1,000 persons
								  served
50 max
(22) Plant Capacity 1 point per 1 MGD
								  capacity
25 max
(23) On-Site Quality Control
(a) bacteriological
(i) MPN/MF
5
(ii) HPC
2
(iii) MMO-MUG (Colilert)
2
(b) pH
(i) meter
2
(ii) test kit
1
(c) fluoride
(i) meter
3
(ii) colorimetric
3
(d) chlorine
(i) titrator
3
(ii) colorimeter/spec.
2
(iii) test kit
1
(e) iron
1
(f) hardness
1
(g) alkalinity
1
(h) turbidity
1
(i) manganese
1
(j) others (1 point each)
1
(k) A.A. Spec, or G.C. Unit
5 each
Authority
					 G.S.
					 90A-21(c);
					 90A-22;
Eff. February
					 1, 1976;
Readopted Eff. March 1, 1979;
Amended Eff.
					 August 1, 2000; August 3, 1992; January 1, 1992; September 1, 1990;
Readopted Eff. September 1, 2018.