1. (a) Any person seeking to expand or modify a small CWS shall submit the following to the department:

   1. (1) Historical water use data for at least the past 2 years;
   2. (2) The proposed design flow calculated in accordance with Env-Dw 405.11;
   3. (3) Documentation demonstrating the existing source(s) have the required supply capacity as required by Env-Dw 405.13;
   4. (4) A written request to amend the design approval;
   5. (5) A description of the necessary changes;
   6. (6) An explanation of why the changes are needed;

   7. (7) For any new wells:

      1. a. The well driller’s well completion report for each well as required in We 800;
      2. b. The water quality analysis results of the water from each well as specified in Env-Dw 405.15; and
      3. c. The permitted production volume of each well proposed to be connected to the small CWS, approved pursuant to Env-Dw 302, Env-Dw 305, or both as applicable;

   8. (8) Plan sheets, including revisions to previously approved plans, and the following, if applicable:

      1. a. For storage tank(s), the information in Env-Dw 405.16 and Env-Dw 405.21;
      2. b. For booster pumps, pump controls, and auxiliary equipment, the information in Env-Dw 405.17 and Env-Dw 405.19;
      3. c. For a pumphouse or pump room, the information in Env-Dw 405.18;
      4. d. For well appurtenances and pumps, the information in Env-Dw 405.20;
      5. e. For wiring and controls, the information in Env-Dw 405.22;
      6. f. For water treatment facilities, the information in Env-Dw 405.23, Env-Dw 405.24, and Env-Dw 405.26; and
      7. g. For water distribution systems, the information in Env-Dw 405.27;
   9. (9) Revised calculations, as applicable;
   10. (10) If infrastructure is decommissioned, photo documentation showing a minimum 12-inch gap in the piping from the original well(s), storage tank(s), and any other decommissioned infrastructure; and

   11. (11) If connection to another PWS is proposed, documentation from the supplying owner certifying that:

       1. a. Adequate quantities of water are available to serve the proposed PWS;
       2. b. With the proposed PWS online, adequate system pressures and source capacity will be maintained; and
       3. c. The design fee as required by Env-Dw 402.03.
2. (b) For deepening or hydrofracturing of wells at CWS, the applicant shall comply with Env-Dw 302 and Env-Dw 305, as applicable.
3. (c) Replacement in-kind does not require department approval, except that replacement of a well shall comply with the requirements of Env-Dw 302 or Env-Dw 305, as applicable.
4. (d) The plans and specifications for modifications to PWSs having a design flow greater than 20,000 gpd shall be sealed by a professional civil or sanitary engineer licensed in the state of New Hampshire.
5. (e) The department shall approve the application to modify the CWS if the design meets the criteria in this part.

Source. #14158, eff 12-25-24