California Leaking Underground Fuel Tank (LUFT) Historical Case Analyses

The primary goal of this study is to support revision of the leaking underground fuel tank (LUFT) corrective action process. California LUFT case historical data have been collected by state regulatory agencies for about ten years. Analysis of these data can provide information about the fate and transport of fuel hydrocarbons (FHCs) released into California`s diverse hydrogeologic settings. The LUFT case data can also provide a basis for continuous evaluation of both the past and future impact LUFT releases may have on human health, the environment, and groundwater resources. Several key questions that can be addressed by an analysis of the California LUFT case historical data are: Do FHC plumes behave in predictable ways? What factors influence the length and mass of FHC plumes? To what extent are FHC plumes impacting California`s groundwater resources? The answers to these questions will help identify risk- and resource-management approaches that balance the cost of performing remediation against the anticipated benefits. The historical LUFT case analysis was divided into three phases, i.e., exploratory, primary, and secondary analysis phases. This document reports the results of the exploratory and primary analysis phases.

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