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NORM <br /> ss"+ <br /> UNDERGROUND STORAGE TANKS <br /> On September 23, 19889 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 $1 billion to test their <br /> systems 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 euickly identified and more cost- <br /> effective remediation plans developed. <br /> Typical Soil Gas Survey Results <br /> ¢ ►aooucr vannas <br /> 1 4 <br /> sacrrnnooUsr <br /> OF-01, Ci a <br /> SCALE TYPICAL. SOIL. GAS SURVEY RESULTS- <br /> 0 50 100 FEET MAP SHOWING BENZENE CONCENTRATIONS <br /> (PARTS PER BILLION) <br /> • SOIL GAS SAMPLE <br /> LOCATION <br /> • s a <br /> • �O a 0100 • • <br /> 0 <br /> 1000 <br /> �0 <br /> BURIED TANK <br /> • 0 PUMPS <br /> • • • a•Q <br /> SERVICE <br /> ! • • • •�00 • r STATION <br /> l O <br /> • - 0 - <br />