(1) A purveyor submitting a new or expanding Group B system design for approval using a nonemergency intertie source shall provide the following to the department or health officer:

(a) A copy of the intertie agreement under subsection (2) of this section;

(b) Evidence that the supplying water system currently operates in compliance with chapter 246-290 or 246-291 WAC;

(c) Location of the proposed intertie;

(d) Information on any water quality issues and treatment being used;

(e) Demonstration of the source capacity and hydraulic capacity of the supply and receiving systems at the designed flow rate through the intertie;

(f) A copy of the water right or water right change issued by ecology, if required under RCW 90.03.383;

(g) Identification of alternative sources that will be used when the intertie agreement expires if the water is not being provided in perpetuity; and

(h) Verification that a source meter has been installed to measure water received.

(2) An intertie agreement between purveyors must identify:

(a) Specific time periods in which water will be provided;

(b) The volume of water available for use, including any seasonal or other restrictions; and

(c) How operations will be coordinated.