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

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