| 21. | The operator of an SL system was in a metal underground tank below the antennas.
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| 22. | Another would be to pump cold fuel into them from underground tanks shortly before takeoff.
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| 23. | Water is raised at Mill Meece by lift pumps which deliver water to an underground tank.
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| 24. | At other locations, they topped off underground tanks.
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| 25. | The base was located near a strategic north-south corridor, and included a large underground tank-repair depot.
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| 26. | But it dissolves easily in water, and contamination from leaking underground tanks has afflicted nearly 30 states.
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| 27. | Buried underground tanks or free-standing silos can be used, if sufficient space is available in the building.
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| 28. | First, underground tanks are insulated, so when warm gas is put in the tank, it stays warm.
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| 29. | Homeowners who do not have insurance on their underground tanks, however, face a far more uncertain future.
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| 30. | The main problem in the USA has been lax regulation on the environmental requirements for underground tanks.
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