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The Light Nonaqueous-Phase Liquids (LNAPLs) Team is developing the technical and regulatory guidance document, Evaluation of the Cost and Effectiveness of Innovative and Aggressive Technology Applications at Large LNAPLs Impact Sites. The guide will be based on an assessment of LNAPLs remedial technology application cases and will provide a technical criteria framework to evaluate the effectiveness of LNAPLs remediation technologies ranging from source-zone natural attenuation to containment to aggressive removal. The framework will better equip stakeholders to evaluate technologies in the context of risk and non-risk based cleanup objectives and differing land use goals such as those applicable to operating facilities versus land to be re-used for other purposes. Subsequently, the team will develop curriculum to train stakeholders. Assessment, remediation, and management of LNAPLs present some of the greatest challenges to corrective action and cleanup at petroleum manufacturing and handling facilities such as refineries, bulk product terminals, airports and military bases. Corrective action goals may be reached sooner if stakeholders have the technical resources available to them with regard to LNAPLs behavior and the cost, performance capabilities, and limits of the available remediation technologies. Unfortunately, the general lack of such information creates barriers for advancing projects to site closure and often impedes stakeholder willingness to try more effective, innovative or aggressive technologies. A better understanding of these principals may also result in regulatory acceptance of more passive LNAPLs remedial technologies. The LNAPLs Team continues the work of the US EPA Remediation Technology Development Forum “NAPL Cleanup Alliance” which, from 2001 to 2006, was charged with identifying technically practicable, cost-effective solutions to petroleum hydrocarbon contamination problems at larger sites. Part of this work was to also develop a better understanding of the cost and effectiveness of existing, innovative, or aggressive LNAPLs removal technologies. The NAPL Cleanup Alliance developed and published A Decision Framework for Cleanup of Sites Impacted by Light Non-Aqueous Phase Liquids (LNAPLs) (EPA 542-R-04-011), and a classroom training module, The Basics – Understanding the Behavior of LNAPLs in the Subsurface. The LNAPLs Team will build from these works and from products developed by the ITRC DNAPL Team. The team will produce a white paper, Criteria for Evaluating Innovative and Aggressive Technologies for Application at Large LNAPLs Impacted Sites, a technology overview document: LNAPLs Source Zone Natural Attenuation , and evaluate and revise the NAPL Cleanup Alliance Module 1 training curriculum the first year. The team will complete the technical regulatory guidance document and corresponding Module 2 training curriculum, Applying an Improved LNAPLs Understanding and What it Means for the Environment, in year two.
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