Nebraska Administrative Code › Topic - ENVIRONMENT AND ENERGY › Title 197 - RULES AND REGULATIONS FOR THE CERTIFICATION OF WASTEWATER TREATMENT OPERATORS › Appendix B - Industrial Wastewater Treatment Plant Point Rating System

Current through June 17, 2024
A wastewater system with only collection, lift stations, and
	 chlorination is considered a collection system and not a wastewater treatment
	 plant. Each unit process will have points assigned only once.
Item
Points
Your Plant
Size (1 point minimum to 10 point
				  maximum)
Design flow average day or peak month's flow average day,
				  whichever is larger (1 point minimum to 10 point maximum)
1 pt/MGD or part
Preliminary Treatment
Grease removal
3
Plant pumping of main flow
3
Screening, comminution, microscreens
3
Grit removal
3
Equalization
1
Sedimentation/clarification
5
Primary Treatment
Dissolved air flotation
3
Coagulation/flocculation
5
Secondary Treatment
Bio-filtration with secondary clarifiers
10
Activated sludge w/o secondary clarifiers (including extended
				  aeration, oxidation ditches)
15
Stabilization ponds without aeration
5
Stabilization ponds with aeration
8
Tertiary Treatment
Ion exchange for advanced waste treatment
10
Reverse osmosis, electrodialysis and other membrane
				  filtration techniques
15
Chemical recovery, carbon regeneration
4
Polishing ponds for advanced waste treatment
2
Chemical/physical advanced waste treatment w/o
				  secondary
15
Chemical/physical advanced waste treatment following
				  secondary
10
Biological or chemical/biological advanced waste
				  treatment
12
Additional Treatment Processes
pH adjustment
1
Oil separation
3
Chemical pretreatment (except chlorination, enzymes)
4
Filtration
6
Air stripping
5
Solids Handling
Solids conditioning
2
Solids thickening
5
Anaerobic digestion of solids
10
Aerobic digestion of solids
6
Evaporative sludge drying
2
Irrigation of solids
5
Mechanical dewatering
8
Solids reduction (including incineration, wet
				  oxidation)
12
On-site landfill for solids
2
Solids composting
10
Disinfection (0 point minimum to 10 point
				  maximum)
No disinfection
0
Chlorination or comparable
5
On-site generation of disinfectant
5
Effluent Discharge (0 point minimum to 21 point
				  maximum)
Post aeration
4
Receiving stream sensitivity (0 point minimum to 6 point
				  maximum)1
VII. "Effluent limited segment" in US EPA terminology;
				  secondary treatment is adequate
0
VIII. More than secondary treatment is required
2
IX. "Water quality limited segment" in US EPA terminology;
				  stream conditions are very critical (dry run, for example) and a very high
				  degree of treatment is required
3
X. Direct recycle and reuse
6
Land disposal, evaporation
2
Subsurface disposal
4
Biological or chemical scrubbers for odor control
5
Instrumentation (0 point minimum to 6 point
				  maximum)3
The use of SCADA or similar instrumentation systems to
				  provide data with no process operation
0
The use of SCADA or similar instrumentation systems to
				  provide data with limited process operation
2
The use of SCADA or similar instrumentation systems to
				  provide data with moderate process operation
4
The use of SCADA or similar instrumentation systems to
				  provide data with extensive or total process operation
6
Laboratory control (0 point minimum to 20 point
				  maximum)2
Bacteriological/biological (0 point minimum to 10 point
				  maximum)
XI. Lab work done outside the plant
0
XII. Membrane filter procedures
3
XIII. Use of fermentation tubes or any dilution method; fecal
				  coliform determination
5
XIV. Biological identification
7
XV. Viral studies or similarly complex work conducted
				  on-site
10
Chemical/physical (0 point minimum to 10 point
				  maximum)
XVI. Lab work done outside the plant
0
XVII. Push-button or visual methods for simple tests (pH,
				  settleable solids)
3
XVIII. Additional procedures (DO, COD, BOD gas analysis,
				  titrations, solids, volatile content)
5
XIX. More advanced determinations (specific constituents;
				  nutrients, total oils, phenols)
7
XX. Highly sophisticated instrumentation (atomic absorption,
				  gas chromatography)
10
Your Plant Total
1 . The key concept is the degree of dilution provided under low flow
	 conditions with points from 0 to 6.
2. The key concept is to credit laboratory analyses done on-site by
	 plant personnel under direct responsible charge with points from 0 to
	 20.
3. Supervisory Control and Data Acquisition (SCADA)
	 system.