A. A supplier of water may use point-of-entry devices to comply with maximum contaminant levels only if the supplier meets the following requirements. The supplier shall:
(1) Apply the technology under a plan approved by the Approving Authority. The plan shall:
(a) Include results from field testing the device to be employed.
(b) Provide certification that a device will achieve the desired performance.
(c) Describe a monitoring schedule that addresses the parameters to be measured, frequency, and location. The monitoring plan shall be adequate to ensure that the microbiological safety of the water is not compromised and that it provides health protection equivalent to a monitoring plan for central water treatment.
(d) Address the tendency for an increase in heterotrophic bacteria concentration in water treated with activated carbon, if it will be used in the treatment devices.
(2) Install, operate, and maintain a point-of-entry device for each building connected to the system.
(3) Provide monthly operating reports to the Approving Authority in a format specified by the Approving Authority.
(4) Maintain the microbiological safety of the water.
(5) Provide the Approving Authority with all the information it needs to determine that the conditions of this section will be met, and to determine that the supplier of water has taken the necessary measures so that the rights and responsibilities of the public water system customer convey with title upon sale of property.
B. Suppliers of water may not use bottled water or point-of-use devices to achieve compliance with an MCL. Bottled water or point-of-use devices may be used on a temporary basis to avoid an unreasonable risk to health.