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NYC Plumbing Code

§ 1301.9.4.1 — § 1301.9.4.1

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What is NYC PC § 1301.9.4.1?

Quick Answer

This section mandates that underground storage tanks be ballasted or secured to prevent floating when empty, particularly in saturated soil conditions. It specifies that the combined weight of the tank and ballast must exceed the buoyancy force, and outlines foundation requirements to support the tank's weight. Applies to property operators managing underground storage tanks.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1301.9.4.1 Ballast.

PC § 1301.9.4.1

Where the soil can become saturated, an underground storage tank shall be ballasted, or otherwise secured, to prevent the tank from floating out of the ground when empty. The combined weight of the tank and hold down ballast shall meet or exceed the buoyancy force of the tank. Where the installation requires a foundation, the foundation shall be flat and shall be designed to support the weight of the storage tank when full, consistent with the bearing capability of adjacent soil.

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