15A NCAC 18D .0203       DETERMINATION OF VARIOUS CLASSES OF CERTIFICATION

(a)  Determination of various classes of certification shall be based on the classification of water treatment facilities to be operated.

(b)  The designation of plant classification shall be based on the following point system:

                                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/splash tray                                                                          2

(C)          diffused                                                                                                 3

(D)          packed tower (VOC reduction)                                                         10

(8)           pH Adjustment (primary)

(A)          caustic (NaOH)                                                                                    10

(B)          lime/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/anthracite                                                                    8

(ii)           synthetic media (birm)                                                       8

(iii)          granular activated carbon (GAC)                                     10

(B)          gravity

(i)            sand                                                                                       10

(ii)           anthracite (mixed)/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)                                                                      10

(D)          mixed bed or split stream                                                                   12

(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/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 pt)                                       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 pt. each)                                                                                1

(K)          A.A. Spec, or G.C. Unit                                                                       5 each

(c)  The designation of distribution system classifications shall be based on system characteristics as outlined in Rule .0205 of this Section.

 

History Note:        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.