The following operating standards shall apply to all Limited Use Public Water Systems:

• All components shall function properly at all times.
• Should the system shut down, the supplier shall take steps to restore it immediately. The supplier shall alert all users in advance of maintenance that will cause pressure loss or water quality change. The supplier shall follow the standards outlined in the Guidelines for the Issuance of Precautionary Boil Water Notices.
• The supplier shall alert the County Health Department twenty-four (24) hours in advance where possible, but no later than the next business day after any shutdown or treatment failure, or within twenty-four (24) hours after discovering sabotage or vandalism to the water system.
• Where disinfection equipment is installed on a Limited Use Public Water System but is not required, the free available chlorine residual and total chlorine residual shall not exceed 4.0 mg/L throughout the entire system.
• The system shall maintain a minimum water pressure of twenty (20) pounds per square inch throughout the water system at all times.

• The water system shall contain no cross-connections.

• Where continuous disinfection is required to remove confirmed microbiological contamination:

q   Disinfection equipment shall maintain the free available chlorine residual and total chlorine residual between 0.2 milligrams per liter (mg/L) and 4.0 mg/L throughout the entire system.

q   The supplier shall test the chlorine residual daily and post the results in a log kept on premises. The test kit shall be functional and kept on site at all times.

q   For Limited Use Community Systems, the supplier shall assure a state certified water treatment plant operator services the system weekly.

The following maintenance standards shall apply to all Limited Use Public Water Systems:

• All components shall be in good repair and used as intended.
• Replacement of components shall be with new or like-new approved products.
• The vicinity within five (5) feet of the water system and well shall be free of vegetation, debris and hazards which could prevent or hinder inspection.
• If an emergency modification is performed, the supplier must apply to the Department for system modification per section 64E-8.002 on the next business day.
• The supplier shall record the date and type of all maintenance and repairs performed on the system in a log kept on the premises.
• Systems vulnerable to vandalism shall be secured, but any enclosure shall not restrict visibility or authorized access for inspection.
• The upper end of the well casing shall be watertight except for vents which shall be directed downward and protected with 20-mesh screen.