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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. 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 least 10 percent of its volume underground.

3. Storage tank - Wikipedia

   en.wikipedia.org/wiki/Storage_tank

   Storage tank. Storage tanks are containers that hold liquids or compressed gases. The term can be used for reservoirs (artificial lakes and ponds), and for manufactured containers. The usage of the word "tank" for reservoirs is uncommon in American English but is moderately common in British English. In other countries, the term tends to refer ...

4. What are leaking underground storage tanks and how are they ...

   www.aol.com/news/leaking-underground-storage...

   Roughly 81 million people live within a quarter-mile of an underground storage tank that's experienced at least one leak, based on the latest EPA data. Most tanks were made of steel in the mid ...

5. Deep geological repository - Wikipedia

   en.wikipedia.org/wiki/Deep_geological_repository

   Deep geological repository is a type of long-term storage that isolates waste in geological structures that are expected to be stable for millions of years, with a number of natural and engineered barriers. Natural barriers include water-impermeable (e.g. clay) and gas-impermeable (e.g. salt) layers of rock above and surrounding the underground ...

6. Resource Conservation and Recovery Act - Wikipedia

   en.wikipedia.org/wiki/Resource_Conservation_and...

   The operation of underground storage tanks (USTs) became subject to the RCRA regulatory program with enactment of the Hazardous and Solid Waste Amendments of 1984 (HSWA). [10] At that time there were about 2.1 million tanks subject to federal regulation, and the EPA program led to closure and removal of most substandard tanks. [11]

7. Septic tank - Wikipedia

   en.wikipedia.org/wiki/Septic_tank

   A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic sewage treatment. [ 2 ] Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). [ 2 ]