Current through Register Vol. 49, No. 13, September 23, 2024
This part applies to the construction of a groundwater
thermal exchange device (heat pump) with reinjection to an aquifer.
A. A groundwater thermal exchange device with
reinjection to an aquifer must not be constructed until a permit has been
issued by the commissioner to the property owner.
B. The property owner or the property owner's
agent must submit to the commissioner a permit application on a form provided
by the commissioner, or in a format approved by the commissioner. The
application must be legible and must contain:
(1) the name, license number, and signature
of the well contractor constructing the wells;
(2) the name, address, and signature of the
owner of the property on which the device will be installed;
(3) the township number, range number,
section, and one quartile, and the property street address if assigned, of the
proposed device location;
(4) a
description of existing wells and any wells proposed to be constructed
including the unique well numbers, locations, well depth, diameters of bore
holes and casing, depth of casing, grouting methods and materials, and dates of
construction;
(5) a description of
the heat pump unit including the manufacturer's name, model number, maximum
water flow rate in gallons per minute, name of proposed installer, and proposed
installation date;
(6) water
withdrawal information, pumping schedule with rates in gallons per minute,
times and duration, and the total amount of water to be injected into the
aquifer;
(7) the specifications for
piping including the materials to be used for piping, the flow control valve
setting, the provisions for pressure testing the system, and the provisions for
disinfection of the completed system; and
(8) a diagram of the proposed piping
system.
C. The diagram
must show that the proposed piping system includes:
(1) a 15 psi pressure valve at the discharge
well;
(2) a solenoid valve on the
discharge side of heat pump unit;
(3) a pressure gauge in-line between the
pressure valve and solenoid valve;
(4) a device to provide automatic shutdown of
the system if the discharge line pressure is below 15 psi;
(5) an in-line thermometer in the heat pump
inlet and outlet lines;
(6) a check
valve in-line from the supply well;
(7) unthreaded taps and shutoff valves in the
supply and discharge lines;
(8) a
filter in the discharge line from the heat pump;
(9) a flow control valve and flow meter in
the supply line;
(10) air release
valves; and
(11) any other devices
to be installed such as pressure tanks or isolation valves.
D. The system must comply with
chapter 4715.
E. The groundwater
thermal exchange device must be constructed within 18 months of the date the
permit is issued.
Statutory Authority: MS s
103I.101;
103I.111;
103I.205;
103I.221;
103I.301;
103I.401;
103I.451;
103I.501;
103I.525;
103I.531;
103I.535;
103I.541;
103I.621;
144.05;
144.12;
144.122;
144.383;
157.04; 157.08; 157.09; 157.13
