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Underground Storage Tank Services and Remediation DesignE-21's personnel experience in underground storage tank (UST) and leaking underground storage tank (LUST) services is comprehensive and includes environmental compliance with local, state, and federal regulations, risk management, design, and construction observation of soil and groundwater remediation activities. E-21 personnel have conducted over 50 UST assessments, closures and LUST investigations, and our staff members have experience on over 100 UST and LUST projects. Our services and experiences include tank removals, closure inspections, closure reports, Phase II site assessments, monitoring well installations, LUST plume investigations, soil vapor surveys, water and vapor analyses, Corrective Action Plan (CAP) development, remediation design, soil excavation and disposal evaluations, and soil/water treatment system installation and operation. Our UST services personnel are familiar with the appropriate state and local regulations and guidelines for closures, investigations and corrective actions. We conduct our inspections, observations, and investigations using instrumentation and procedures meeting or exceeding current standards of the profession. Field instrumentation employed includes: photoionization detectors, organic vapor analyzers, and gas chromatography equipment for field screening activities and quantitative documentation of observations. For site assessment and plume delineation investigations, we use soil headspace analyses, soil vapor surveys, soil borings, and/or monitoring well installations. In many instances, a soil vapor survey or direct push mini-boring/well advancement can provide information for optimum monitoring well locations at a significant cost savings to the overall project. We strive to use the most cost effective and technically suitable remediation methods. Remediation methods our personnel have used on LUST clean-up projects include:
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