Utah Administrative Code
Topic - Environmental Quality
Title R317 - Water Quality
Rule R317-10 - Certification of Wastewater Works Operators
Section R317-10-6 - Facility Classification System

TABLE 1

FACILITY CLASSIFICATION SYSTEM

FACILITY CATEGORY

CLASS

I

II

III

IV

Collection (1)

Pop. Served

3,500 and less

3,501 to 15,000

15,001 to 50,000

50,001 and greater

Treatment Plant (2)

Range of Fac. Points

30 and less

31 to 55

56 to 75

76 and greater

Small Lagoon Systems(3)

Pop. Equiv. Served

3,500 and 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

Item

Points

SIZE (2 PT Minimum - 20 PT Maximum)

Max. Population equivalent (PE) served, peak day(1)

1 - 10

Design flow average day or peak month average, whichever is larger(2)

1 - 10

VARIATION IN RAW WASTE (3)

Variations do not exceed those normally or typically expected

0

Recurring deviations or excessive variations of 100 - 200% in strength and/or flow

2

Recurring deviations or excessive variations of more than 200% in strength and/or flow

4

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

1 0

Activated sludge

1 5

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 secondary

15

Chemical/physical advanced waste treatment following secondary

1 0

Biological or chemical/biological advanced waste treatment

12

Nitrification by designed extended aeration only

2

Ion exchange for advanced waste treatment

1 0

Reverse osmosis, electrodialysis and other membrane filtration techniques

1 5

Advanced waste treatment chemical recovery, carbon regeneration

4

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

1 0

Utilization of digester gas for heating or cogeneration

5

Aerobic digestion of solids

6

Evaporative sludge drying

2

Solids reduction (including incineration, wet oxidation)

1 2

On-site landfill for solids

2

Solids composting

1 0

Land application of biosolids by contractor

2

Land application of biosolids under direction of facility operator in DRC

1 0

DISINFECTION (10 pt. max.)

Chlorination or ultraviolet irradiation

5

Ozonation

1 0

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 method (or E. coli determination)

5

Chemical/physical (10 pt. max):

Lab work done outside the plant

0

Push-button, visual methods for simple tests (i.e. pH, settleable solids)

3

Additional procedures (ie, DO, COD, BOD, gas analysis, titrations, solids volatile content)

5

More advanced determinations (ie, specific constituents; nutrients, total oils, phenols)

7

Highly sophisticated instrumentation (i.e., atomic absorption, gas chromatography)

10

(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.