New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Dw - Drinking Water Programs
Chapter Env-Dw 400 - PUBLIC WATER SYSTEM CLASSIFICATION AND DESIGN
Part Env-Dw 405 - DESIGN STANDARDS FOR SMALL COMMUNITY WATER SYSTEMS
Section Env-Dw 405.29 - Operation and Maintenance Manual

Universal Citation: NH Admin Rules Env-Dw 405.29

Current through Register No. 13, March 27, 2025

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(a) The builder of the public water system shall prepare an operation and maintenance manual for the water system owner to submit to the department.

(b) The manual shall be bound so as to provide a permanent document for the water system owner and a ready reference for the water system operator.

(c) The operation and maintenance manual shall include:

(1) A schematic drawing of the treatment process, which shall identify each unit of the treatment equipment by:
a. Type;

b. Size;

c. Model number; and

d. Any appurtenances;

(2) An original or a photocopy of the description of the treatment equipment from the manufacturer's catalogue;

(3) A separate schematic drawing of the treatment process in the normal production configuration, which shall include:
a. A written description of the process, which shall reference the schematic drawing and show flow direction; and

b. The approximate expected values, settings or feed rates for pumps, gauges, gate valves and controllers in the production mode;

(4) A separate schematic drawing of the treatment process in the normal backwash or regeneration configuration, which shall include:
a. A written description which references the schematic drawing, showing the backwash or regeneration process functions which shall include:
1. The flow rate of backwash or regeneration and its temperature dependency where applicable;

2. The duration of backwash or regeneration; and

3. The frequency of anticipated backwashes or regenerations; and

b. The approximate expected values, settings, or feed rates for pumps, gauges, gate valves and controllers in the backwash mode;

(5) Recommended short- and long-term maintenance schedules for each piece of equipment;

(6) A description of common operational problems and proposed corrective operator responses;

(7) A description of how the operator can maximize the efficiency of the treatment process relative to:
a. Energy use;

b. Chemical use;

c. Maximizing the net treated water production volume;

d. Minimizing the volume of waste and by-products produced; and

(8) A blank copy of the compliance and oversight operational form that is required by Env-Dw 503 to be submitted to the department when a water system performs treatment.

(See Revision Note at part heading for Env-Dw 405) #10612, eff 6-1-14

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