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2. Underground storage tank - Wikipedia

   en.wikipedia.org/wiki/Underground_storage_tank

   A horizontal cylindrical steel tank with a factory-applied coating and galvanic anodes prior to installation underground. Underground storage tank removal in Washington, D.C. An underground storage tank (UST) is, according to United States federal regulations, a storage tank, including any underground piping connected to the tank, that has at ...

3. Aquifer thermal energy storage - Wikipedia

   en.wikipedia.org/wiki/Aquifer_thermal_energy_storage

   To inhibit the subsidence, cold surface water was reinjected into the aquifer. Subsequently, it was observed that the stored water remained cold after injection and could be used for cooling. Storage of thermal energy in aquifers was suggested in the 1970s which led to field experiments and feasibility studies in France, Switzerland, US and Japan.

4. Water supply network - Wikipedia

   en.wikipedia.org/wiki/Water_supply_network

   A raw water collection point (above or below ground) where the water accumulates, such as a lake, a river, or groundwater from an underground aquifer. Raw water may be transferred using uncovered ground-level aqueducts, covered tunnels, or underground water pipes to water purification facilities. Water purification facilities.

5. Rainwater tank - Wikipedia

   en.wikipedia.org/wiki/Rainwater_tank

   Another way to store rainwater without worry of contamination by mosquitoes is to use underground storage tanks. Underground tanks keep the water too cool (below 12.8 °C or 55.0 °F) for mosquito larvae and also are dark, preventing both mosquito, bacterial, and algae growth.

6. A new SoCal underground water storage project aims to keep ...

   www.aol.com/news/socal-underground-water-storage...

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7. Ground-coupled heat exchanger - Wikipedia

   en.wikipedia.org/wiki/Ground-coupled_heat_exchanger

   A heat exchanger coil is placed before the air inlet of the heat recovery ventilator. Typically a brine liquid (heavily salted water) is used as the heat exchanger fluid. Many European installations are now using this setup due to the ease of installation. No fall or drainage point is required and it is safe because of the reduced risk from mold.