R18-5-115. Grades of Water Treatment Plants and Distribution Systems

A. Grading of water treatment plants. This subsection does not apply to a facility that distributes water but does not treat water or to a facility that distributes water and disinfects by chlorine gas or hypochlorite only to maintain disinfection levels in the distribution system. The Department shall grade a water treatment plant according to the sum of the points it the Department assigns for each plant characteristic. 1. The Department shall assign points for the purpose of grading a water treatment plant as follows: Plant Characteristics Points Population 1 per 5,000 Maximum Design Capacity 1 per Millions of Gallons per Day up to 10 Groundwater Source 3 Surface or Groundwater Under the Direct Influence of Surface Water Source 5 Carbon Dioxide 2 pH Adjustment 3 Packed Tower Aeration 6 Air Stripping 6 Stability or Corrosion Control 3 Taste and Odor 8 Iron/Manganese Removal 8 Ion Exchange Softening 10 Chemical Precipitation Softening 15 Coagulant Addition 6 Flocculation 4 Sedimentation 4 Upflow Clarification 2 Fluoridation 5 Activated Alumina 6 Blending 5 Residual Waste Stream 5 Control Systems Technology 2 Biologically Active Filter 20 Granular Media Filter 15 Pressure Filter 15 Gravity Sand Filter 10 Membrane Filtration 15 Chlorine Gas 6 Hypochlorite Liquid 2 Hypochlorite Solid 2 Chloramine 9 Chlorine Dioxide 9 Ozone 12 Ultraviolet 3 2. The Department shall assign a grade by the total number of points assigned to the facility, as follows: Grade Point Range Grade 1 1 to 25 Grade 2 26 to 50 Grade 3 51 to 70 Grade 4 More than 70 B. Grading of water distribution systems. The Department shall grade a distribution system according to the sum of the points the Department assigns for each system characteristic. 1. The Department shall assign points for the purpose of grading a distribution system as follows: System Characteristics Points Population 1 per 5,000 Maximum Design Capacity 1 per Millions of Gallons per Day up to 10 Pressure Zones 5 Booster Stations 5 Storage Tanks 3 Blending 5 Fire Protection Systems/Testable Backflow Prevention Assemblies* 5 Cathodic Protection 3 Control System Technologies 2 Chlorine Gas 6 Hypochlorite Liquid 2 Hypochlorite Solid 2 Chloramine 9 Chlorine Dioxide 9 *The presence of one or both of these devices earns five points for the facility. 2. No points are added for Grade 1 small systems that: a. Only distribute groundwater; b. Serve fewer than 501 persons; c. Have no disinfection or disinfect by chlorine gas or hypochlorite only; and d. Do not store water or store water only in storage tanks. 3. The Department shall assign a grade by the total number of points assigned to the facility, as follows: Grade Point Range Grade 1 0 Grade 2 1 to 20 Grade 3 21 to 35 Grade 4 More than 35