R317-10-6. Facility Classification System

Treatment plants and collection systems shall be classified in accordance with Table 1. TABLE 1 FACILITY CLASSIFICATION SYSTEM FACILITY CLASS CATEGORY I II III IV Collection Pop. 3,500 3,501 to 15,001 to 50,001 and (1) Served and less 15,000 50,000 greater Treatment Range 30 and 31 to 55 56 to 75 76 and Plant (2) of Fac. less greater Points Small Pop. 3,500 Lagoon Equiv. and Systems(3) Served less (1) Simple "in-line" treatment, such as booster pumping, preventive chlorination, or odor control, is considered an integral part of a collection system. (2) Treatment plants shall be assigned "facility points" in accordance with Table 2 "Wastewater Treatment Plant Classification System". (3) A combined certificate shall be issued for treatment works and collection system operation. TABLE 2 WASTEWATER TREATMENT PLANT CLASSIFICATION SYSTEM Each Unit process should have points assigned only once. Item Points SIZE (2 PT Minimum - 20 PT Maximum) Max. Population equivalent (PE) served, 1 - 10 peak day(1) Design flow average day or peak month average, 1 - 10 whichever is larger(2) VARIATION IN RAW WASTE (3) Variations do not exceed those normally or 0 typically expected Recurring deviations or excessive variations of 2 100 - 200% in strength and/or flow Recurring deviations or excessive variations of 4 more than 200% in strength and/or flow Raw wastes subject to toxic waste discharges 6 Acceptance of septage or truck-hauled waste 2 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 w/o aeration 5 Stabilization ponds w/aeration 8 TERTIARY TREATMENT Polishing ponds for advanced waste treatment 2 Chemical/physical advanced waste treatment w/o 15 secondary Chemical/physical advanced waste treatment 10 following secondary Biological or chemical/biological advanced waste 12 treatment Nitrification by designed extended aeration only 2 Ion exchange for advanced waste treatment 10 Reverse osmosis, electrodialysis and other 15 membrane filtration techniques Advanced waste treatment chemical recovery, carbon 4 regeneration Media Filtration 5 ADDITIONAL TREATMENT PROCESSES Chemical additions (2 pts./each for max. of 6 pts.) 2 - 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 conditioning 2 Solids thickening (based on technology) 2 - 5 Mechanical dewatering 8 Anaerobic digestion of solids 10 Utilization of digester gas for heating 5 or cogeneration Aerobic digestion of solids 6 Evaporative sludge drying 2 Solids reduction (including incineration, wet 12 oxidation) On-site landfill for solids 2 Solids composting 10 Land application of biosolids by contractor 2 Land application of biosolids under direction 10 of facility operator in DRC DISINFECTION (10 pt. max.) Chlorination or ultraviolet irradiation 5 Ozonation 10 EFFLUENT DISCHARGE (10 pt. max.) Mechanical Post aeration 2 Direct recycle and reuse 6 Land treatment and disposal (surface or subsurface) 4 INSTRUMENTATION (6 pt. max.) Use of SCADA or similar instrumentation systems to provide data with no process operation 0 Use of SCADA or similar instrumentation systems to provide data with limited process operation 2 Use of SCADA or similar instrumentation systems to provide data with moderate process operation 4 Use of SCADA or similar instrumentation systems to provide data with extensive/total process operation 6 LABORATORY CONTROL (15 pt. max)(4) Bacteriological/biological (5 pt. max): Lab work done outside the plant 0 Membrane filter procedures 3 Use of fermentation tubes or any dilution 5 method (or E. coli determination) Chemical/physical (10 pt. max): Lab work done outside the plant 0 Push-button, visual methods for simple tests 3 (i.e. pH, settleable solids) Additional procedures (ie, DO, COD, BOD, gas 5 analysis, titrations, solids volatile content) More advanced determinations (ie, specific 7 constituents; nutrients, total oils, phenols) Highly sophisticated instrumentation (i.e., 10 atomic absorption, gas chromatography) (1) 1 point per 10,000 P.E. or part; maximum of 10 points (2) 1 point per MGD or part (3) Key concept is frequency and/or intensity of deviation or excessive variation from normal or typical fluctuations; such deviation may be in terms of strength, toxicity, shock loads, inflow and infiltration, with point values ranging from 0 - 6. (4) Key concept is to credit laboratory analyses done on-site by plant personnel under the direction of the operator in direct responsible charge with point values ranging from 0 - 15.