초록 ▼

Characterization of organic contaminants in subsurface formation is performed by methods for detecting the presence of nonaqueous phase liquid in a subsurface formation, and for determining the composition and for determining the volume of nonaqueous phase liquids. Generally the methods comprise int

Characterization of organic contaminants in subsurface formation is performed by methods for detecting the presence of nonaqueous phase liquid in a subsurface formation, and for determining the composition and for determining the volume of nonaqueous phase liquids. Generally the methods comprise introducing one or more partitioning tracers and one or more non-partitioning tracers at one or more injection points located in the subsurface formation and measuring separation between the one or more partitioning tracers and the one or more non-partitioning tracers from one or more sampling points located in the subsurface formation to determine presence, composition and/or volume of nonaqueous phase liquid in the subsurface formation. In addition, the methods can be used to assess the performance of an attempted remediation.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for determining a composition of nonaqueous phase liquid located in a subsurface formation and consisting of a known number n, where n is two or more, of major organic species, comprising:(A) introducing one or more non-partitioning tracers and at least n parti

[ What is claimed is:] [1.]1. A method for determining a composition of nonaqueous phase liquid located in a subsurface formation and consisting of a known number n, where n is two or more, of major organic species, comprising:(A) introducing one or more non-partitioning tracers and at least n partitioning tracers into one or more injection points located in the subsurface formation;(B) measuring separation between the one or more non-partitioning tracers and the at least n partitioning tracers from one or more sampling points; and(C) comparing the measured separation with a reference separation of the one or more non-partitioning tracers and the at least n partitioning tracers when contacted with nonaqueous phase liquids of known composition to determine the mole fraction of at least one major organic species of the nonaqueous phase liquid in the subsurface formation.