1. (a) Water distribution piping at small CWSs shall be installed in accordance with the provisions of the appropriate AWWA specification listed in Env-Dw 402, as applicable to the type of distribution pipe chosen.
2. (b) At a proposed small CWS, the quality of the workmanship and adherence to the approved design and pipe specifications shall be documented in writing to the department in accordance with (c) through (g), below. Such certification shall not be required for the expansion or modification of the distribution system once the initial design has been completed and the water system has been assigned a PWS ID number.
3. (c) The person who owns and is proposing the creation of the new small CWS shall retain the services of a qualified third party who is not an employee and does not otherwise have a financial interest in the project or legal relationship with the project principals to certify the quality of the water distribution piping installation.

4. (d) The following parties shall be acceptable to the department for providing the certification required by (c) above:

   1. (1) A New Hampshire-certified water distribution system operator with a grade I or higher certificate;
   2. (2) A New Hampshire-licensed civil or sanitary engineer;
   3. (3) A city or town building or code enforcement official or other person with significant experience in drinking water industry specifications for piping and pipe installation of the city or town in which the project is located; or
   4. (4) Another individual with experience in the construction of PWSs as approved by the department.
5. (e) Certification from the owner or developer of the PWS or from the contractor performing the distribution pipe installation shall not be acceptable.

6. (f) The person or firm selected as the third party to inspect the quality of the distribution piping installation shall:

   1. (1) Inspect a minimum of 20% of the total footage for each size of water distribution pipe included on the approved plans; and
   2. (2) Provide to the department a map identifying the pipe section(s) observed and a certificate or letter indicating that the quality of the distribution pipe installation met the applicable AWWA installation standard and was consistent with the best practices in the industry.

7. (g) The certificate required by (f)(2) above, shall include:

   1. (1) The name and address of the owner or developer;
   2. (2) The name of the development and city or town in which it is located;
   3. (3) The name of the street and center line stationing for which the certificate applies;
   4. (4) The name of the contractor;
   5. (5) Pipe information including type, size, and cover depth;
   6. (6) The date(s) of the inspection(s) for the distribution pipe installation;
   7. (7) The inspector’s qualification pursuant to (d) above, which indicate expertise with pipe line installation and the applicable AWWA pipe installation standards; and
   8. (8) Confirmation that the results of the leakage test on the pipe did not exceed the leakage limits specified in the applicable AWWA pipe installation standards.
8. (h) Copies of the leakage test results for the entire water distribution system and the certificate and map as per (f) above, shall accompany the as-built plans or record drawings submitted pursuant to Env-Dw 405.29(b).
9. (i) Such certification shall not be required if the total length of new distribution piping installed is less than 250 feet.

Source. (See Revision Note at part heading for Env-Dw 405) #10612, eff 6-1-14; ss by #14158, eff 12-25-24 (formerly Env-Dw 405.31)