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TECHNICAL MEASUREMENT GUIDANCE FOR LNAPL NATURAL SOURCE ZONE DEPLETION
CRC for Contamination Assessment and Remediation of the Environment, CRC CARE Technical Report No. 44, 281 pp, 2018

Natural source zone depletion (NSZD) is a term used to extend the traditional understanding of natural attenuation to the LNAPL source zone. It describes the collective, naturally occurring processes of dissolution, volatilization, and biodegradation that result in mass losses of LNAPL petroleum hydrocarbon constituents from the subsurface. This document provides a knowledge base and procedures for consistency in the measurement of NSZD by a variety of methods, including aqueous, soil gas flux, biogenic heat, and LNAPL compositional change method based on chemical analysis of oil. The guide is generally applicable to a wide range of environmental remediation sites containing petroleum hydrocarbon impacts in the subsurface. It is intended for use at sites that have a need for theoretical, qualitative, or quantitative understanding of NSZD processes. https://www.crccare.com/files/dmfile/CRCCARETechnicalreport44_TechnicalmeasurementguidanceforLNAPLnaturalsourcezonedepletion.pdf



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