C.M.R. 90, 429, ch. 1, app 429-1-A
Current through 2024-51, December 18, 2024
| Treatment System Classification Point Values | |
| Item | Points |
| Size ( 2 point minimum to 10 point maximum) | |
| Maximum population (1 point minimum to 5 points maximum) | 1 point per 10,000 |
| Design flow average (1 point minimum to 5 points maximum) | 1 point per MGD |
| Water Supply Sources | |
| Groundwater | 3 |
| Groundwater under the influence of surface water | 5 |
| Surface Water | 5 |
| Chemical Treatment / Addition Processes | |
| Fluoridation | 5 |
| Disinfection: | |
| Chlorination | 5 |
| Chloramination | 10 |
| Chlorine dioxide | 5 |
| Ultraviolet light | 5 |
| Ozonation | 10 |
| pH adjustment (calcium carbonate, carbon dioxide, hydrochloric acid, calcium oxide, calcium hydroxide, sodium hydroxide, sulfuric acid, other) | 5 |
| Stability or corrosion control (calcium oxide, calcium hydroxide, sodiumor potassium carbonate, sodium hexametaphosphate, other) | 5 |
| Coagulation & Flocculation Process | |
| Chemical addition (aluminum sulfate, bauxite, ferrous sulfate, ferric sulfate, calcium oxide, bentonite, calcium carbonate, carbon dioxide, sodium silicate, other) | 1 point per chemical coagulant added (5 points max.) |
| Rapid mix units: | |
| Mechanical mixers | 3 |
| Injection mixers | 2 |
| In-line blender mixers | 2 |
| Flocculation tanks: | |
| Hydraulic flocculators | 2 |
| Mechanical flocculators | 3 |
| Clarification / Sedimentation Process | |
| Horizontal Flow (rectangular basins) | 5 |
| Horizontal Flow (round basins) | 7 |
| Solid-contact | 15 |
| Inclined-plate, tube | 10 |
| Dissolved air flotation | 30 |
| Filtration Process | |
| Single media filtration | 3 |
| Dual or mixed media filtration | 5 |
| Microscreens | 5 |
| Diatomaceous earth filters | 5 |
| Cartridge filters As pre-filter to another process As microbiological removal | 2 5 |
| Slow sand filters | 5 |
| Item | Points |
| Direct filtration | 5 |
| Pressure or greens and filtration | 5 |
| Other Treatment Processes | |
| Aeration | 3 |
| Packed tower aeration | 5 |
| Ion exchange / softening (Cation, Anion, Adsorptive) To control Primary MCL contaminant To control secondary MCL contaminant | 5 2 |
| Adsorptive media | 5 |
| Lime - soda ash softening | 5 |
| Membrane filtration- reverse osmosis, micro, ultra, nano | 10 |
| Powdered activated carbon | 5 |
| Other Processes | 0 to 15 |
| Residuals Disposal | |
| Discharge to lagoons | 5 |
| Discharge to lagoons and then raw water source | 8 |
| Discharge to raw water | 10 |
| Disposal to sanitary sewer | 3 |
| Mechanical dewatering | 5 |
| On-site disposal | 5 |
| Land application | 5 |
| Solids composting | 5 |
| Facility Characteristics | |
| Instrumentation: | |
| The use of SCADA or similar instrumentation to provide data with no process operation | 0 |
| The use of SCADA or similar instrumentation to provide data with limited process operation | 2 |
| The use of SCADA or similar instrumentation to provide data with moderate process operation | 4 |
| The use of SCADA or similar instrumentation to provide data with extensive or total process operation | 6 |
| Gravity Fed Systems Total atmospheric storage less than average day design flow | 5 |
C.M.R. 90, 429, ch. 1, app 429-1-A