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r <br /> r <br /> w <br /> UNDERGROUND STORAGE TANKS <br /> On September 23, 1988, the Environmental Protection Agency <br /> published the final federal rules governing the inatollation and <br /> operation of some I.4 million tank systema nationwide. Many have <br /> already begun spending an estimated $l billion to test their <br /> aystems for leaks, or remove and replace thea altogether. <br /> 1 Soil tray analysis is o 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 rigrsting to the surface in the vicinity of <br /> LUSTS, contaminant plumes tett be nuickly identified and more cost- <br /> effective remediation � lons developed. <br /> Typical Soil Gas Survey Results <br /> ! ! awoax�re,vesa <br /> 9 ! ! ! <br /> SCALE TYPICAL SOIL GAS SURVEY RESULT <br /> 0 30 1 QFEET MAP SHOWING BENZENE CONCENTRA71ONS <br /> ( PARTS PER BILLION) . <br /> • SOIL GAS SAMPLE <br /> LOCATION , • • <br /> 10 <br /> • OQ ; <br /> 0100 • • <br /> a <br /> • BURIED TANK <br /> • • ® PUMPS <br /> • • • • <br /> 0 0 SERVICE <br /> • • , 00 w • STAT 10 N <br /> • r <br /> �0 <br /> • 00 <br />