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US 5,350,691 AGranted
Method for abandoning an underground storage tank
OwnerRichard C. Hannay, Dudley B. Pateinventors
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Abstract
A method of abandoning an underground storage tank including the steps of: removing residuals, if any, from the tank and filling the tank with a mixture which includes water, sand, a binding agent and a material for promoting uniform mixing of said mixture. In one embodiment of the invention, a surfactant is added to reduce the amount of water required by the mixture.
Claims15
A method of abandoning an underground storage tank in which hydrocarbon substances have been stored comprising the steps of:
- a. removing residual substances, if any, from said tank;
- and
- b. completely filling said tank with a mixture which includes water, sand, a binding agent and a material for promoting uniform mixing of said mixture wherein said mixture forms a solid composition with a structural strength of 40 psi to 250 psi.
Dependencies are inferred from the claim text.