Standard Guide for NAPL Mobility and Migration in Sediment— Evaluating Ebullition and Associated NAPL/Contaminant Transport

SIGNIFICANCE AND USE
4.1 Ebullition is ubiquitous in sediment and is primarily a significant concern when there is associated NAPL/contaminant transport, resulting in exposure risk to humans, ecological receptors, or both. Ebullition may also be a concern when capping has been chosen as part of a site remedy.  
4.2 Understanding the potential for ebullition-facilitated NAPL/contaminant transport in sediment is an important element of an overall conceptual site model (CSM) that forms a basis for (1) evaluating if (and how) human and ecological receptors may be exposed to NAPL/contaminants, and (2) assessing remedial alternatives. In addition, demonstrating the potential for (and extent of) ebullition-facilitated transport of NAPL/contaminants in sediments to regulators and other stakeholders has been historically hampered by the lack of standardized terminology and characterization protocols. The complexity of ebullition-facilitated NAPL/contaminant transport in sediment, and the lack of agreed upon methods for analysis and interpretation of site data, has led to uncertainty in corrective action decision-making at sediment sites. This has sometimes resulted in misleading expectations about remedial outcomes. The ebullition-facilitated transport mechanisms for NAPL/contaminants in sediments are different from advective transport mechanisms in sediment or in upland environments, due to a variety of physical, geochemical, and biological differences, thus necessitating this guide.  
4.3 This guide is intended to serve as a stand-alone document to consider conditions that are unique to ebullition and ebullition-facilitated NAPL/contaminant transport, as well as to complement other guides used for CSM development at contaminated sediment sites (Guides E1689, E1739, E2081, E2531, and E3248). This guide will aid users in understanding the unique and fundamental characteristics of sediment environments that influence the occurrence of ebullition-facilitated NAPL/contaminant transport. Understan...
SCOPE
1.1 This guide addresses the processes that lead to (or influence) ebullition-facilitated nonaqueous phase liquid (NAPL)/contaminant transport, methods for quantifying that transport, considerations for sample timing, sampling procedures, and use of results in extrapolating an annual ebullition-facilitated NAPL/contaminant load to a site, or a portion of a site. This guide is not intended to address remediation of sites where ebullition-facilitated transport of NAPL/contaminants is occurring, fate and transport of contaminants subsequent to the ebullition transport mechanism, the measurement of contaminant concentrations within the gas bubbles, ebullition-associated human health and ecological risk, NAPL advection, or determining the depth of ebullition below the mudline. Additionally, gas transport without NAPL/contaminants is possible in areas with gas generation and limited NAPL contamination of the sediment, which is covered in this guide. Ebullition should be evaluated at sites where sediment capping is anticipated.  
1.2 The users of this guide should be aware of the appropriate regulatory requirements that apply to sediment sites where NAPL is present or suspected to occur. The user should consult applicable regulatory agency requirements to identify appropriate technical decision criteria and seek regulatory approvals, as necessary.  
1.3 ASTM standard guides are not regulations; they are consensus standard guides that may be followed voluntarily to support applicable regulatory requirements. This guide may be used in conjunction with other ASTM guides developed for sediment programs. The guide supplements characterization and remedial efforts performed under international, federal, state, and local environmental programs, but it does not replace regulatory agency requirements.  
1.4 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.  ...

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ASTM E3300-21 - Standard Guide for NAPL Mobility and Migration in Sediment— Evaluating Ebullition and Associated NAPL/Contaminant Transport
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E3300 − 21
Standard Guide for
NAPL Mobility and Migration in Sediment— Evaluating
1
Ebullition and Associated NAPL/Contaminant Transport
This standard is issued under the fixed designation E3300; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This guide addresses the processes that lead to (or
responsibility of the user of this standard to establish appro-
influence) ebullition-facilitated nonaqueous phase liquid
priate safety, health, and environmental practices and deter-
(NAPL)/contaminant transport, methods for quantifying that
mine the applicability of regulatory limitations prior to use.
transport, considerations for sample timing, sampling
1.6 This international standard was developed in accor-
procedures, and use of results in extrapolating an annual
dance with internationally recognized principles on standard-
ebullition-facilitated NAPL/contaminant load to a site, or a
ization established in the Decision on Principles for the
portion of a site. This guide is not intended to address
Development of International Standards, Guides and Recom-
remediation of sites where ebullition-facilitated transport of
mendations issued by the World Trade Organization Technical
NAPL/contaminants is occurring, fate and transport of con-
Barriers to Trade (TBT) Committee.
taminants subsequent to the ebullition transport mechanism,
the measurement of contaminant concentrations within the gas
2. Referenced Documents
bubbles, ebullition-associated human health and ecological
2
risk, NAPL advection, or determining the depth of ebullition
2.1 ASTM Standards:
below the mudline.Additionally, gas transport without NAPL/
E1689Guide for Developing Conceptual Site Models for
contaminants is possible in areas with gas generation and
Contaminated Sites
limitedNAPLcontaminationofthesediment,whichiscovered
E1739Guide for Risk-Based Corrective Action Applied at
in this guide. Ebullition should be evaluated at sites where
Petroleum Release Sites
sediment capping is anticipated.
E2081Guide for Risk-Based Corrective Action
E2531Guide for Development of Conceptual Site Models
1.2 The users of this guide should be aware of the appro-
and Remediation Strategies for Light Nonaqueous-Phase
priate regulatory requirements that apply to sediment sites
Liquids Released to the Subsurface
where NAPLis present or suspected to occur. The user should
E2993Guide for Evaluating Potential Hazard as a Result of
consult applicable regulatory agency requirements to identify
Methane in the Vadose Zone
appropriate technical decision criteria and seek regulatory
E3163Guide for Selection and Application of Analytical
approvals, as necessary.
Methods and Procedures Used during Sediment Correc-
1.3 ASTM standard guides are not regulations; they are
tive Action
consensus standard guides that may be followed voluntarily to
E3248GuideforNAPLMobilityandMigrationinSediment
support applicable regulatory requirements.This guide may be
–Conceptual Models for Emplacement and Advection
used in conjunction with other ASTM guides developed for
sediment programs. The guide supplements characterization
3. Terminology
and remedial efforts performed under international, federal,
3.1 Definitions:
state,andlocalenvironmentalprograms,butitdoesnotreplace
3.1.1 biogenic, adj—resulting from the activity of living
regulatory agency requirements.
organisms (Guide E2993).
1.4 The values stated in SI units are to be regarded as the
3.1.2 contaminant, n—substance not normally found in an
standard. No other units of measurement are included in this
environment at the observed concentration (Guide E2993).
standard.
1
ThisguideisunderthejurisdictionofASTMCommitteeE50onEnvironmental
2
Assessment, Risk Management and CorrectiveAction and is the direct responsibil- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ity of Subcommittee E50.04 on Corrective Action. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Sept. 15, 2021. Published October 2021. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E3300–21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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