New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Ws - Division of Water
Chapter Env-Ws 300 - NEW HAMPSHIRE DRINKING WATER RULES
Part Env-Ws 374 - DESIGN STANDARDS FOR LARGE PUBLIC WATER SYSTEMS
Section Env-Ws 374.07 - Safety Criteria for Chemical Additive(s) Proposal

Universal Citation: NH Admin Rules Env-Ws 374.07

Current through Register No. 13, March 27, 2025

(a) Safety criteria shall be as specified in this section.

(b) Treatment systems that add a chemical on a continuous basis shall have at least 2 of the methods identified in (c), below, to prevent a chemical overfeed.

(1) Connection of the electrical circuit of the chemical feed pump to the electrical circuit of the main water pump;

(2) Installation of a flow-measuring device with a common disconnect interfaced to the circuit powering the chemical feed pump;

(3) Installation of a continuous-reading analytical device for that particular chemical feed with a disconnect interfaced to the chemical feed pump; or

(4) Any other method for which there is an industry standard.

#8478, eff 11-30-05

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