29. A ground-source geothermal system that does not withdraw water must be constructed in accordance with the following conditions:
(1) the system must not be located in a littoral zone or in a floodplain having a flood recurrence interval of 20 years, or in the identified floodplain of a lake or watercourse unless the 20-year and 100-year flood recurrence intervals have been distinguished;
(2) the components situated below the soil’s surface must be made of materials that are new at the time the facility is installed;
(3) the system cannot use ethylene glycol, potassium acetate and methanol for its operation;
(4) the work to construct the system must be carried out in such a way that no water is contaminated and no environmental degradation occurs;
(5) when the system is installed at a depth of over 5 m in the ground, the soil must be graded above the underground components and over a distance of 1 m around the system in a way that prevents water pooling and water runoff towards the components;
(6) if the system is installed in a floodplain with a flood recurrence interval of 100 years must be designed to resist a 100-year flood and the work must be carried out below the soil’s surface;
(7) the watertightness of the components must be assessed before the system is operated.