Neb. Admin. Code ENVIRONMENT AND ENERGY, tit. 197, app B
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.
Neb. Admin. Code ENVIRONMENT AND ENERGY, tit. 197, app B