1. (a) Holding tanks or closed systems shall not be approved except in the following instances:

   1. (1) As a replacement for an existing system in failure when no other means of disposal is practical; or
   2. (2) When the structure proposed to be served by the holding tank will be connected to a municipal sewer within one year of approval of the holding tank application.

2. (b) Holding tanks shall be:

   1. (1) Water-tight;
   2. (2) A minimum of 2,000 gallons in size; and
   3. (3) Provided with an alarm system to indicate when the tank is full and requires pumping.
3. (c) Holding tanks shall meet the minimum separation distance requirements listed in Table 1008-2.

4. (d) To apply for department approval for a holding tank, the applicant shall complete and submit either electronically at https://www4.des.state.nh.us/OneStopDataProviders/DESLogin.aspx or in paper form the "Application for an Individual Sewage Disposal System", NHDES-W-05-004, February 2026, available at: https://onlineforms.nh.gov/?formtag=NHDES-W-05-004 in addition to the following information:

   1. (1) The information required by Env-Wq 1003.13 and details of an audible and visual alarm system hardwired back to the building’s electric panel; and
   2. (2) A copy of the signed contract with a licensed septage hauler that identifies at least one approved disposal site to which the septage will be hauled.
   3. (d) The owner of the property on which a holding tank has been installed shall:
   4. (1) Retain all receipts for pumping services for a period of 2 years from the date of the receipt; and
   5. (2) Submit copies of said receipts to the local health officer on a quarterly basis.

Source. (See Revision Notes #1 and #2 at chapter heading for Env-Wq 1000) #11184, eff 10-1-16; ss by #14486, eff 2-1-26, EXPIRES: 2-1-36