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n <br />1� <br />C <br />0 <br />11 <br />n <br />J <br />11 <br />1 1 7 1992 <br />4- 110 <br />Z.1 1111,11.111 PERMIT/SERVICES <br />The purpose of my discussion is to present the latest technologies currently being <br />used in the United States to detect leaks from underground storage tank <br />systems. I cannot go into great detail on all technologies because of time <br />constraints, however, I will attempt to provide a broad overview with a focus <br />on those technologies which are currently being implemented by major oil <br />companies in the U.S. <br />Before I begin I would like to make two general comments: <br />First, this presentation is oriented to major oil companies or large retailers who <br />have responsibility for many underground storage tank systems. My <br />emphasis will be on technologies that do not require operator action at the <br />facility but rather operate independently. Also, I will highlight technologies <br />that provide information which can be used remotely for off site analysis of <br />an alarm event or inventory management. Many of these features are not <br />cost effective for small retailers but are quickly becoming indispensable for <br />major retailers whose facility personnel change frequently. <br />Secondly, manufacturers of leak detection equipment in the U.S. design and <br />manufacture to performance standards which are established by the federal <br />government, specifically the EPA. Although these U.S. standards have no <br />impact outside US jurisdiction, a basic understanding of them is required so <br />that sensing technologies can be reviewed in a proper perspective. <br />