R317-10-6. Facility Classification System

  Treatment plants and collection systems shall be classified in accordance with Table 1.

TABLE 1

FACILITY CLASSIFICATION SYSTEM

FACILITY CLASS

CATEGORY I II III IV

Collection Pop. 3,500 3,501 to 15,001 to 50,001 and

(1) Served and less 15,000 50,000 greater

Treatment Range 30 and 31 to 55 56 to 75 76 and

Plant (2) of Fac. less greater

            Points

Small Pop. 3,500

Lagoon Equiv. and

Systems(3) Served less

     (1) Simple "in-line" treatment, such as booster pumping,

preventive chlorination, or odor control, is considered an

integral part of a collection system.

     (2) Treatment plants shall be assigned "facility points"

in accordance with Table 2 "Wastewater Treatment Plant

Classification System".

     (3) A combined certificate shall be issued for treatment

works and collection system operation.

TABLE 2

WASTEWATER TREATMENT PLANT CLASSIFICATION SYSTEM

     Each Unit process should have points assigned only once.

   Item Points

SIZE (2 PT Minimum - 20 PT Maximum)

   Max. Population equivalent (PE) served, 1 - 10

    peak day(1)

   Design flow average day or peak month average, 1 - 10

    whichever is larger(2)

VARIATION IN RAW WASTE (3)

   Variations do not exceed those normally or 0

    typically expected

   Recurring deviations or excessive variations of 2

    100 - 200% in strength and/or flow

   Recurring deviations or excessive variations of 4

    more than 200% in strength and/or flow

   Raw wastes subject to toxic waste discharges 6

   Acceptance of septage or truck-hauled waste 2

PRELIMINARY TREATMENT

   Plant pumping of main flow 3

   Screening, comminution 3

   Grit removal 3

   Equalization 1

PRIMARY TREATMENT

   Clarifiers 5

   Imhoff tanks or similar 5

SECONDARY TREATMENT

   Fixed film reactor 10

   Activated sludge 15

   Stabilization ponds w/o aeration 5

   Stabilization ponds w/aeration 8

TERTIARY TREATMENT

   Polishing ponds for advanced waste treatment 2

   Chemical/physical advanced waste treatment w/o 15

    secondary

   Chemical/physical advanced waste treatment 10

    following secondary

   Biological or chemical/biological advanced waste 12

    treatment

   Nitrification by designed extended aeration only 2

   Ion exchange for advanced waste treatment 10

   Reverse osmosis, electrodialysis and other 15

    membrane filtration techniques

   Advanced waste treatment chemical recovery, carbon 4

    regeneration

   Media Filtration 5

ADDITIONAL TREATMENT PROCESSES

   Chemical additions (2 pts./each for max. of 6 pts.) 2 - 6

   Dissolved air flotation (for other than sludge

   thickening) 8

   Intermittent sand filter 2

   Recirculating intermittent sand filter 3

   Microscreens 5

   Generation of oxygen 5

SOLIDS HANDLING

   Solids conditioning 2

   Solids thickening (based on technology) 2 - 5

   Mechanical dewatering 8

   Anaerobic digestion of solids 10

   Utilization of digester gas for heating 5

    or cogeneration

   Aerobic digestion of solids 6

   Evaporative sludge drying 2

   Solids reduction (including incineration, wet 12

    oxidation)

   On-site landfill for solids 2

   Solids composting 10

   Land application of biosolids by contractor 2

   Land application of biosolids under direction 10

    of facility operator in DRC

DISINFECTION (10 pt. max.)

   Chlorination or ultraviolet irradiation 5

   Ozonation 10

EFFLUENT DISCHARGE (10 pt. max.)

   Mechanical Post aeration 2

   Direct recycle and reuse 6

   Land treatment and disposal (surface or subsurface) 4

INSTRUMENTATION (6 pt. max.)

   Use of SCADA or similar instrumentation systems

    to provide data with no process operation 0

   Use of SCADA or similar instrumentation systems

    to provide data with limited process operation 2

   Use of SCADA or similar instrumentation systems

    to provide data with moderate process operation 4

   Use of SCADA or similar instrumentation systems

    to provide data with extensive/total process operation 6

LABORATORY CONTROL (15 pt. max)(4)

   Bacteriological/biological (5 pt. max):

    Lab work done outside the plant 0

    Membrane filter procedures 3

    Use of fermentation tubes or any dilution 5

     method (or E. coli determination)

   Chemical/physical (10 pt. max):

    Lab work done outside the plant 0

    Push-button, visual methods for simple tests 3

     (i.e. pH, settleable solids)

    Additional procedures (ie, DO, COD, BOD, gas 5

     analysis, titrations, solids volatile

     content)

    More advanced determinations (ie, specific 7

     constituents; nutrients, total oils,

     phenols)

    Highly sophisticated instrumentation (i.e., 10

     atomic absorption, gas chromatography)

    (1) 1 point per 10,000 P.E. or part; maximum of 10 points

    (2) 1 point per MGD or part

    (3) Key concept is frequency and/or intensity of deviation

or excessive variation from normal or typical fluctuations; such

deviation may be in terms of strength, toxicity, shock loads,

inflow and infiltration, with point values ranging from 0 - 6.

    (4) Key concept is to credit laboratory analyses done

on-site by plant personnel under the direction of the operator

in direct responsible charge with point values ranging

from 0 - 15.