Section Env-Ws 308.03 - Point-of-Use Treatment(a) Point-of-use (POU) treatment shall be used only where:(1) There are no non-contaminated sources reasonably available;(2) Centralized treatment or POE is not feasible; and(3) Absorption of the contaminant(s) through the skin is not a significant exposure pathway, as determined using health risk assessment data based on the type(s) and concentration(s) of the contaminant(s) known to be present.(b) To obtain approval to install POU treatment, the owner of the water system shall submit the following in writing to the department: (1) The name, location, and EPA identification number of the system;(2) The contaminant(s) proposed to be treated by the POU devices;(3) An explanation of the system's attempts to locate non-contaminated sources; and(4) An explanation, with supporting documentation, of why centralized treatment or POE is not feasible.(c) The department shall approve a POU treatment concept if it determines that: (1) A non-contaminated source is not available to the water system;(2) Centralized treatment or POE is not feasible; and(3) The POE devices will provide equivalent treatment.(d) POU treatment shall not be approved for use at new community water systems.(e) The public water system shall operate and maintain the POU treatment system.(f) The public water system shall develop a monitoring plan consistent with Env-Ws 320 through Env-Ws 329 and obtain department approval for the plan before installing POU treatment devices. This monitoring plan shall provide health protection equivalent to a monitoring plan for central water treatment.(g) The approved technology shall be applied under a plan approved by the department and the microbiological safety of the water shall be maintained.(h) The department shall require from the system adequate certification of performance, field testing, and, if not included in the certification process, a complete engineering design review of the POU devices.(i) The design and application of the POU devices shall consider the tendency for an increase in heterotrophic bacteria concentrations in water treated with activated carbon. If bacterial presence occurs, the water system owner shall use frequent backwashing, post contactor disinfection, heterotrophic plate count monitoring, or any combination of these techniques to ensure that the microbiology safety of the water is not compromised.(j) All consumers shall be equally protected where POU treatment is allowed. Every building connected to a system shall have a POU device installed, maintained, and monitored. The water system owner shall submit data documenting that every building is subject to treatment and monitoring. If POU treatment is used, it shall remain a permanent part of the supply and shall not be separated by sale, lease, or other conveyance of the property.N.H. Code Admin. R. Env-Ws 308.03
(See Revision Note at chapter heading Env-Ws 300) by #6521, eff 6-4-97; ss by #8360, INTERIM, eff 6-4-05, EXPIRES: 12 -1-05 ; ss by #8498, eff 11-30-05