Naji N. Akladiss
Maine Department of Environmental Protection (MEDE)
Naji Akladiss, P.E. is a Project Manager with the Maine Department of Environmental Protection (MEDE), Bureau of Remediation in Augusta Maine. He has worked for the Department since 1989 (as an Analytical Chemist in MEDEP Laboratory; and as a Project Manager for federal facilities since 1991). He has experience in environmental technologies and Superfund remediation. Naji is the Project Manager for the clean-up of two Superfund sites in the state of Maine. Prior to joining the Maine DEP Naji worked for Rockwell International in Rockwell’s printed circuit board plant in Maine. He is the leader of the Interstate Technology and Regulatory Council (ITRC) Integrated DNAPLs Site Strategy Team as well as the co-leader of the Characterization team. He has also served as the ITRC state Point of Contact from Maine. Naji earned a bachelor's degree in applied sciences in 1975. He is a licensed Professional Engineer in the State of Maine and a certified Quality Engineer (CQE) by the American Society for Quality.
Integrated DNAPL Site Characterization and Tools Selection
Sites contaminated with NAPLs present significant environmental challenges and have proven to be recalcitrant to remediation, especially where sites have been contaminated with DNAPLs. Our industry can no longer address DNAPL and dissolved phase contamination separately, but rather they need to be considered together. Experience gained at these sites has driven us to update overall our understanding of DNAPL and dissolved phase contamination. This includes the controlling role of small geologic heterogeneities on the fate and transport of DNAPL and associated dissolved phase contamination. This workshop will begin by presenting the new DNAPL Conceptual Site Model (CSM) based on this new understanding.
The workshop will then discuss properties of DNAPLs and associated aqueous, sorbed, and vapor phase contamination, and how they partition throughout the subsurface. Mechanisms that control the flow of DNAPLs in the subsurface including solubility, capillary entry pressure, saturation and residual saturation, wettability and interfacial tension will be discussed. Our workshop will present the DNAPL life cycle models of “higher” solubility DNAPLs such as chlorinated solvents, and the “lower” solubility DNAPLs such as coal tars and creosotes. We will also discuss the latest characterization approaches for sites contaminated with LNAPLs.
We will present a detailed module describing the objectives-based Integrated Site Characterization (ISC) process that will both clarify how to collect appropriate scale data, and what types of data are collected with an emphasis on geology where appropriate. We’ll discuss how to manage, analyze, and integrate the large geological-hydrogeological and contaminant data bases that can be developed using the ISC approach.
Finally, we will present a live demonstration of the ITRC Site Characterization Tools table that will help guide site characterization efforts as a resource that will resent many characterization tools, what they are used for, how geology affects tool choices, and references to more information on the tools.