Conn. Agencies Regs. tit. 22a, 416, app A
Size of facility (2-20 points) | Points | ||
Maximum population equivalent 1 (P.E.) served on peak day | 1 point per 10,000 P.E. part thereof, for a maximum of 10 points | _________ | |
Design flow | 1 point per MGD or part thereof, for a maximum 10 points | _________ | |
Land disposal (evaporation) | 2 | _________ | |
Subsurface disposal | 4 | _________ | |
Variation in strength and/or flow of raw wastewater (slight to extreme) (0-6 points) | |||
Variations do not exceed those normally present | 0 | _________ | |
Recurring variations of 100% to 200% from norm | 2 | _________ | |
Recurring variations of more than 200% from norm | 4 | _________ | |
Raw wastes that impair biological treatment processes | 6 | _________ | |
Pretreatment plant processes utilized | |||
Pumping of main flow other than recycle flows at any point within the facility | 3 | _________ | |
Screening or comminution | 1 | _________ | |
Grit removal | 3 | _________ | |
Equalization | 1 | _________ | |
Effluent pumping when receiving infiltration (e.g. stream flooding) | 3 | _________ | |
Combined Sewer Overflow | |||
Storage | 1 | _________ | |
Treatment | 3 | _________ | |
Primary treatment utilized | |||
Primary clarifiers | 5 | _________ | |
Combined sedimentation/digestion (Imhoff tanks) | 5 | _________ | |
Micro screening or other physical treatment | 3 | _________ | |
Trickling filters used as roughing filters with recycle and intermediate clarifiers | 5 | _________ | |
Trickling filters used as roughing filters with recycle or intermediate clarifiers | 3 | _________ | |
SCADA | |||
Operational | 6 | _________ | |
Monitoring | 2 | _________ | |
Secondary treatment utilized | |||
Trickling filter or rotating biological contractor with secondary clarifiers | 10 | _________ | |
Activated sludge with secondary clarifiers | 15 | _________ | |
Activated sludge without primary clarifiers including extended aeration, sequential batch | |||
including extended aeration, sequential batch reactors and oxidation ditches | 18 | _________ | |
Stabilization ponds without aeration | 5 | _________ | |
Aerated lagoon | 8 | _________ | |
Advanced treatment utilized | |||
Post aeration (mechanical) | 2 | _________ | |
Direct recycle and reuse | 6 | _________ | |
Polishing pond | 2 | _________ | |
Chemical phosphorus removal | 4 | _________ | |
Biological phosphorus removal | 6 | _________ | |
Nitrification processes | 6 | _________ | |
Nitrification and denitrification processes | 9 | _________ | |
Denitrification filter | 6 | _________ | |
Ion exchange | 10 | _________ | |
Reverse osmosis or electrodialysis | 15 | _________ | |
Chemical recovery or carbon regeneration | 4 | _________ | |
Mechanical filtration | 10 | _________ | |
Intermittent sand filters with gravity under drains | 5 | _________ | |
Solids Handling | |||
Solids conditioning with polymers, ferricchloride or alum | 2 | _________ | |
Thickening by means of: Gravity | 2 | _________ | |
Mechanical (dissolved air flotation, gravity belt or centrifuge) | 5 | _________ | |
Anaerobic digestion | 10 | _________ | |
Aerobic digestion | 6 | _________ | |
Evaporative sludge drying | 2 | _________ | |
Mechanical dewatering | 5 | _________ | |
Incineration, wet oxidation, or other solids reduction | 12 | _________ | |
On-site disposal | 2 | _________ | |
Composting (In vessel) | 10 | _________ | |
Composting (static pile) | 5 | _________ | |
Sludge storage | 1 | _________ | |
Sludge pumping offsite | 2 | _________ | |
Disinfection | |||
Chlorination or comparable disinfection | 5 | _________ | |
Chlorination/Dechlorination | 8 | _________ | |
On-site generation and application of disinfectant | 5 | _________ | |
Ultraviolet light | 5 | _________ | |
Odor control | |||
Biofilter | 3 | _________ | |
Adsorption with activated carbon or equal | 3 | _________ | |
Wet scrubber | 6 | _________ | |
Thermal destruction with catalytic process | 6 | _________ | |
Odor reducing sprays | 2 | _________ | |
Chemical Additives | |||
Septage treatment system | 3 | _________ | |
Sedimentation additives | 2 | _________ | |
Nutrient removal | 2 | _________ | |
Biological laboratory analysis | |||
Laboratory analysis performed outside the facility | 0 | _________ | |
Laboratory analysis performed at the facility: | |||
Membrane filter | 2 | _________ | |
Use of fermentation tubes or any dilution method using a fecal coliform bacteria determination | 3 | _________ | |
Identification and counts of biota by percent relative abundance | 3 | _________ | |
Chemical and/or Physical laboratory analysis | |||
Laboratory analysis performed outside the facility | 0 | _________ | |
Laboratory analysis performed at the facility: | _________ | ||
Push-button or visual methods for simple analysis (e.g. settleable solids) | 2 | _________ | |
Additional analysis including dissolved oxygen, biological oxygen demand, chemical oxygen demand, gas analysis, titration, solids, and volatile content | 3 | _________ | |
More advanced analyses including specific constituents, nutrients, total oils, phenols, or use of highly sophisticated instrumentation including atomic absorption, gas chromatography | 3 | _________ | |
Total points: | _________ | ||
Conn. Agencies Regs. tit. 22a, 416, app A