本报告描述了定义和提升地上储罐（AST）泄漏检测技术水平的项目第四阶段的结果。本文研究了三种泄漏检测技术——被动声学、土壤蒸汽监测和容积式——适用于各种油箱类型、石油燃料和操作条件。本研究还评估了涉及多个测试和产品级别的通用泄漏检测方法的适用性，并使用两种或更多测试方法确定了14个AST的完整性。另见相关文件Publs 322和323。

This report describes the results of the fourth phase of a program to define and advance the state of the art of leak detection for aboveground storage tanks (ASTs). Three leak detection technologies are examined--passive-acoustic, soil-vapor monitoring, and volumetric--over a wide range of tank types, petroleum fuels, and operational conditions. This study also assesses the applicability of a general leak detection methodology involving multiple tests and product levels as well as determines the integrity of 14 ASTs using two or more test methods. See also related documents Publs 322 and 323.