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UNDERGROUND STORAGE TANKS <br /> On September 23, 1988, the Environmental Protection Agency <br /> published the final federal rules governing the installation and <br /> operation of some 1 . 4 million tank systems nationwide. Many have <br /> already begun spending an estimated ;l billion to test their <br /> systema for leaks, or remove and replace them altogether. <br /> Soil gas analysis is a highly effective, non-disruptive method for <br /> detecting and delineating subsurface contamination from leaking <br /> underground storage tanks (LUSTS) . By measuring the volatile <br /> organic - compounds migrating to the surface in the vicinity of <br /> LUSTS, contaminant plumes can be quickly identified and more cost- <br /> effective remediation gens developed. <br /> Typical Soil Gas Survey Results * , <br /> * reoacT v�ra�a <br /> SCALE TYPICAL SOIL GAS SURVEY RESULTTr <br /> °" "' <br /> 0 50 100 FEET MAP SHOWING BENZENE CONCENTRATIONS <br /> ( PARTS PER BILLION ) <br /> • SOIL GAS SAMPLE <br /> LOCATION • <br /> %O <br /> r X'0; • 0%00 • • <br /> app <br /> BURIED TANK <br /> PUMPS <br /> aSERVICE <br /> • • • •,�00 • p • <br /> STATION <br /> 00 ' <br /> • ,0 <br />