The NAVFAC’s ‘New Developments in LNAPL Site Management’ summarizes new developments in the area of natural source zone depletion (NSZD) and reviews key tools for evaluating the practicability of Total Petroleum Hydrocarbons (TPH) and LNAPL recovery.

API Guidance Document

E-Flux’s technology was recognized in the 2017 API Document for Quantification of Vapor Phase-Related Natural Source Zone Depletion Processes. This important guide is focused on the quantification of NSZD through the measurement of CO₂ efflux, and acknowledges the important role of carbon isotope analysis in this NSZD quantification. “The use of ¹⁴C is arguably the best, most quantitative means for background correction and it should be considered of utmost reliability.”


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