The LNAPL Resource Center contains manuals, software and other technical material to help you address cleanup of free-phase petroleum hydrocarbons in the shallow subsurface.
This easy-to-read brochure offers answers to practical and technical questions about cost-effective management, cleanup or closure of sites with groundwater impacted by light non-aqueous phase liquids (LNAPL), such as petroleum hydrocarbons.
API Publication 4762, April 2016
Nicholas Mahler, Tom Sale, Tim Smith and Mark Lyverse
First published online: 28 DEC 2011
Tim Smith, Tom Sale, Mark Lyverse
First published online: 10 APR 2012
Nicholas Mahler, Tom Sale, Mark Lyverse
First published online: 22 MAY 2012
The 6 files available for download include the updated API LNAPL transmissivity workbook, a user guide, and three example workbooks (Ex1, Ex2 and Ex3). There is also a metric version of the workbook. This is a prepublication version, and minor edits may
occur prior to final publication. View More
API Publication 4760 May 28, 2008
API LDRM Version 1.2 addresses a units conversion error in Version 1.1 for the metric units output for skimmer well recovery rates.
The API LNAPL Distribution and Recovery Model (LDRM) simulates the performance of proven hydraulic technologies for recovering free-product petroleum liquid releases to groundwater. Model scenarios included in the LDRM are hydrocarbon liquid recovery
using: single- and dual-pump well systems, skimmer wells, vacuum-enhanced well systems, and trenches. The LDRM provides information about LNAPL distribution in porous media and allows the user to estimate LNAPL recovery rates, volumes and times.
API Publication 4715 September 2002
The Guide is designed to provide an overall approach for evaluating LNAPL at a site to assess its potential risk, quantitatively defining mobility and recoverability, developing remedial strategies, and examining methods to enhance site closure.
API Publication 4711 July 2001
Important fluid and soil property parameters are explained. Methods to measure each parameter are presented in order of relevance for use in environmental free-product mobility/recovery assessments.
This database is a collection of information about samples that have had their capillary parameters determined, as well as other physical parameters measured. Its purpose is to help users who are trying to characterize the movement and distribution of
LNAPL within a site that has a limited set of direct observations.
Basic Baildown Testing Procedures to Measure LNAPL Transmissivity
A 14 minute training video about proper field procedures to facilitate successful performance of baildown testing to estimate LNAPL transmissivity