Neb. Admin. Code ENVIRONMENT AND ENERGY, tit. 197, app A
A wastewater system with only collection, lift stations, and chlorination is considered a collection system and not a wastewater treatment plant. Each unit process should will have points assigned only once.
Item | Points | Your Plant |
Size (2 point minimum to 20 point maximum) | ||
Maximum population equivalent (PE) or part served, peak day (1 point minimum to 10 point maximum) | 1 pt per 10,000 or part | |
Design flow average day or peak month's part flow average day, whichever is larger (1 point minimum to 10 point maximum) | 1 pt per MGD or part | |
Variation in raw waste (0 point minimum to 6 point maximum)1 | ||
Variations do not exceed those normally or typically expected | 0 | |
Recurring deviations or excessive variations of 100 to 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 | |
Impact of septage or truck-hauled waste (0 point minimum to 4 point maximum) | ||
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 without aeration | 5 | |
Stabilization ponds with 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 | 10 | |
Biological or chemical/biological advanced waste treatment | 12 | |
Nitrification by designed extended aeration only | 2 | |
Ion exchange for advanced waste treatment | 10 | |
Reverse osmosis, electrodialysis and other membrane filtration techniques | 15 | |
Advanced waste treatment chemical recovery, carbon regeneration | 4 | |
Media filtration | 5 | |
Additional Treatment Processes | ||
Chemical additions (2 points each for a maximum of 6 points) | 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 stabilization | 5 | |
Gravity thickening | 2 | |
Mechanical dewatering | 8 | |
Anaerobic digestion of solids | 10 | |
Utilization of digester gas for heating or cogeneration | 5 | |
Aerobic digestion of solids | 6 | |
Evaporative sludge drying | 2 | |
Solids reduction (including incineration, wet oxidation) | 12 | |
On-site landfill for solids | 2 | |
Solids composting | 10 | |
Land application of biosolids by contractor | 2 | |
Land application of biosolids under direction of facility operator in direct responsible charge | 10 | |
Disinfection (0 point minimum to 10 point maximum) | ||
Chlorination or ultraviolet irradiation | 5 | |
Ozonation | 10 | |
Effluent discharge (0 point minimum to 10 point maximum) | ||
Mechanical post aeration | 2 | |
Direct recycle and reuse | 6 | |
Land treatment and disposal (surface or subsurface) | 4 | |
Instrumentation (0 point minimum to 6 point maximum)3 | ||
Use of SCADA or similar instrumentation systems to provide data w/ no process operation | 0 | |
Use of SCADA or similar instrumentation systems to provide data w/ limited process operation | 2 | |
Use of SCADA or similar instrumentation systems to provide data w/ moderate process operation | 4 | |
Use of SCADA or similar instrumentation systems to provide data w/ extensive or total process operation | 6 | |
Laboratory control (0 point minimum to 15 point maximum)2 | ||
Bacteriological/biological (0 point minimum to 5 point maximum) | ||
..Lab work done outside the plant | 0 | |
..Membrane filter procedures | 3 | |
..Use of fermentation tubes or any dilution method; fecal coliform determination | 5 | |
Chemical/physical (0 point minimum to 10 point maximum) | ||
I. Lab work done outside the plant | 0 | |
II. Push-button or visual methods for simple tests such as pH, settleable solids | 3 | |
III. Additional procedures such as DO, COD, BOD, gas analysis, titrations, solids, volatile content | 5 | |
IV. More advanced determinations such as specific constituents; nutrients, total oils, phenols | 7 | |
V. Highly sophisticated instrumentation such as atomic absorption, gas chromatography | 10 | |
Total Points | ||
1 The key concept is frequency and/or intensity of deviation or excessive variation from normal or typical fluctuations; such deviation can be in terms of strength, toxicity, shock loads, I/I, with points from 0 to 6.
2 The key concept is to credit laboratory analyses done on-site by plant personnel under the direction of the operator in direct responsible charge with points from 0 to 15.
3. Supervisory Control and Data Acquisition (SCADA) system.
Neb. Admin. Code ENVIRONMENT AND ENERGY, tit. 197, app A