A method of in situ tank sump treatment

Abstract

The present invention relates to a method of in situ treating an interior area of a tank sump associated with an underground storage tank comprising the steps of (a) preparing an interior surface of a tank sump by cleaning said interior surface of said tank sump to obtain a cleaned tank sump, wherein said interior of said tank sump comprising sidewalls extending from a bottom wall of said tank sump; (b) covering an interior surface of said cleaned tank sump by applying a first coating onto said interior surface of said cleaned tank sump, wherein said first coating is resin; (C) allowing said first coating cured onto said interior surface of said cleaned tank sump until obtaining a tacky or touch dry condition to obtain a fluid-tight tank sump covered with a first coating; (d) covering an interior surface of said fluid-tight tank sump covered with a first coating by applying a second coating onto said interior surface of said fluid-tight tank sump covered with a first coating to obtain a fluid-tight tank sump covered with a second coating, wherein said second coating is a first epoxy resin; (e) covering an interior surface of said fluid-tight tank sump covered with a second coating by laying fiberglass cloth onto said interior surface of said fluid-tight tank sump covered with a second coating to obtain a fluid-tight tank sump covered with fiberglass cloth; (f) covering an interior surface of said fluid-tight tank sump covered with fiberglass cloth by applying a third coating onto said interior surface of said fluid-tight tank sump covered with fiberglass cloth until said fiberglass cloth is fully covered by said third coating, wherein said third coating is a second epoxy resin; (g) allowing said third coating cured onto said interior surface of said fluid-tight tank sump covered with fiberglass cloth until obtaining a tacky or touch dry condition to obtain a fluid-tight tank sump covered with a third coating; and (h) covering an interior surface of said fluid-tight tank sump covered with a third coating by applying a fourth coating onto said interior surface of said fluid-tight tank sump covered with a third coating to obtain a treated tank sump, wherein said fourth coating is a gel coat. FIGURE 1