ASTM D4544-20

Standard Practice for Estimating Peat Deposit Thickness

SIGNIFICANCE AND USE
5.1 This practice is used to determine the thickness and lateral extent of a peat deposit such that, the volume of the peat deposit can be calculated. When the overlying material is peat and the underlying one is soil or bedrock, the depth of change may be interpreted as the thickness of peat.  
5.2 This information is useful to peat producers to evaluate the volume of the deposit for planning purposes. It is also useful to peat producers and regulators in evaluating some ecologic functions.
Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
SCOPE
1.1 This practice uses a technique of probing to estimate the thickness of surficial peat deposits overlying mineral soil or bedrock.  
1.1.1 The resistance to penetration of a pushed or driven rod will increase sharply at the boundary of a peat layer with underlying mineral soil or bedrock. When this abrupt change is measured in a series of probings with an appropriate spacing, the thickness and areal extent of peat can be defined and the volume of peat may be calculated.  
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.  
1.3 All measured and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.  
1.3.1 The procedures used to specify how data are collected/recorded and calculated in the standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering data.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.  
1.6 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2020
• ICS: 65.080 - Fertilizers
• Technical Committee: D18 - Soil and Rock
• Drafting Committee: D18.22 - Media for Plant Growth

Relations

• Replaces: ASTM D4544-19 - Standard Practice for Estimating Peat Deposit Thickness
• Effective Date: 01-May-2020
• Refers: ASTM D3740-23 - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-Nov-2023
• Refers: ASTM D3740-19 - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-Oct-2019
• Refers: ASTM D4700-15 - Standard Guide for Soil Sampling from the Vadose Zone (Withdrawn 2024)
• Effective Date: 01-Feb-2015
• Refers: ASTM D653-14 - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 01-Aug-2014
• Refers: ASTM D3740-12a - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-May-2012
• Refers: ASTM D3740-12 - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-Mar-2012
• Refers: ASTM D653-11 - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 01-Sep-2011
• Refers: ASTM D3740-11 - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-Sep-2011
• Refers: ASTM D3740-10 - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-Mar-2010
• Refers: ASTM D653-09 - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 01-Jan-2009
• Refers: ASTM D653-08a - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 01-Dec-2008
• Refers: ASTM D653-08 - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 01-Nov-2008
• Refers: ASTM D3740-08 - Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• Effective Date: 01-Mar-2008
• Refers: ASTM D653-07f - Standard Terminology Relating to Soil, Rock, and Contained Fluids
• Effective Date: 15-Dec-2007

Overview

ASTM D4544-20: Standard Practice for Estimating Peat Deposit Thickness provides a standardized method for determining the thickness and lateral extent of peat deposits. Developed by ASTM International, this practice uses probing techniques to assess the volume of surficial peat deposits that overlie mineral soils or bedrock. Proper estimation of peat thickness is crucial for resource evaluation, ecological assessments, and project planning by peat producers, regulators, and environmental professionals. The procedure outlined in this standard enables more consistent, reliable, and repeatable results in peatlands and similar wetland environments.

Key Topics

• Probing Technique: The standard defines a clear method using graduated steel rods to probe peat layers. The process involves noting a sharp increase in resistance to identify the boundary between peat and underlying soil or bedrock.
• Volume Calculation: By conducting multiple probings at appropriately spaced locations, users can map the lateral extent and depth of the peat, allowing calculation of total deposit volume.
• Significance of Results: Accurate thickness data aids in resource planning, regulatory compliance, and assessment of ecological functions of peatlands.
• Equipment and Sampling: The standard describes the use of graduated rods, peat borers, piston-type samplers, and appropriate containers to ensure accurate depth measurements and sample integrity.
• Procedural Guidance: Steps include vertical alignment, systematic probing, resistance verification, depth measurement, and documentation of sample location and conditions.
• Quality and Competence: Emphasizes the importance of skilled personnel, suitable equipment, and adherence to related ASTM practices, particularly with respect to data accuracy and reporting.

Applications

ASTM D4544-20 is utilized in a range of practical settings, including:

• Peat Resource Evaluation: Peat producers apply this standard to estimate deposit volumes for extraction planning and resource management.
• Wetlands Management: Environmental consultants and regulators use peat thickness data to assess wetland health, hydrology, and ecological function.
• Construction and Land Development: Engineers and planners assess peat depth prior to construction projects to inform site suitability and foundation design.
• Ecological and Carbon Studies: Researchers estimate peat volume to study carbon sequestration potential and monitor habitat changes over time.
• Regulatory Compliance: Ensures consistent documentation in support of permit applications and environmental impact assessments.

Related Standards

The following ASTM standards are referenced or closely related to ASTM D4544-20:

• ASTM D653 - Terminology Relating to Soil, Rock, and Contained Fluids
• ASTM D3740 - Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• ASTM D4700 - Guide for Soil Sampling from the Vadose Zone
• ASTM D6026 - Practice for Using Significant Digits in Geotechnical Data

Practical Value

• Consistent Methodology: Using ASTM D4544-20 provides confidence in repeatable and defendable peat thickness measurements, contributing to project reliability.
• Resource Optimization: Helps maximize the sustainable use of peat deposits by accurately defining extractable limits.
• Planning and Compliance: Facilitates informed planning and regulatory compliance by providing standardized test methods and documentation practices.
• Environmental Stewardship: Supports habitat preservation and carbon budgeting efforts by offering precise peatland data for ecological assessments.

By adhering to ASTM D4544-20, organizations and professionals ensure credible, standardized results in peat thickness estimation, underpinning sound decision-making for environmental, industrial, and regulatory purposes.

Standards Content (Sample)

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: D4544 − 20
Standard Practice for
Estimating Peat Deposit Thickness
This standard is issued under the fixed designation D4544; 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* with professional judgment. Not all aspects of this practice may
be applicable in all circumstances. This ASTM standard is not
1.1 Thispracticeusesatechniqueofprobingtoestimatethe
intended to represent or replace the standard of care by which
thickness of surficial peat deposits overlying mineral soil or
the adequacy of a given professional service must be judged,
bedrock.
nor should this document be applied without consideration of
1.1.1 Theresistancetopenetrationofapushedordrivenrod
a project’s many unique aspects. The word “Standard” in the
will increase sharply at the boundary of a peat layer with
title of this document means only that the document has been
underlyingmineralsoilorbedrock.Whenthisabruptchangeis
approved through the ASTM consensus process.
measured in a series of probings with an appropriate spacing,
1.6 This international standard was developed in accor-
the thickness and areal extent of peat can be defined and the
dance with internationally recognized principles on standard-
volume of peat may be calculated.
ization established in the Decision on Principles for the
1.2 Units—The values stated in SI units are to be regarded
Development of International Standards, Guides and Recom-
asstandard.Nootherunitsofmeasurementareincludedinthis
mendations issued by the World Trade Organization Technical
standard. Reporting of test results in units other than SI shall
Barriers to Trade (TBT) Committee.
not be regarded as nonconformance with this standard.
1.3 All measured and calculated values shall conform to the
2. Referenced Documents
guidelines for significant digits and rounding established in
2.1 ASTM Standards:
Practice D6026.
D653Terminology Relating to Soil, Rock, and Contained
1.3.1 Theproceduresusedtospecifyhowdataarecollected/
Fluids
recorded and calculated in the standard are regarded as the
D3740Practice for Minimum Requirements for Agencies
industry standard. In addition, they are representative of the
Engaged in Testing and/or Inspection of Soil and Rock as
significant digits that generally should be retained. The proce-
Used in Engineering Design and Construction
dures used do not consider material variation, purpose for
D4700Guide for Soil Sampling from the Vadose Zone
obtaining the data, special purpose studies, or any consider-
D6026Practice for Using Significant Digits in Geotechnical
ations for the user’s objectives; and it is common practice to
Data
increase or reduce significant digits of reported data to be
commensuratewiththeseconsiderations.Itisbeyondthescope
3. Terminology
of these test methods to consider significant digits used in
3.1 Definitions:
analysis methods for engineering data.
3.1.1 Fordefinitionsofcommontermsusedinthisstandard,
1.4 This standard does not purport to address all of the
refer to Terminology D653.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Practice
priate safety, health, and environmental practices and deter-
4.1 Agraduated, steel rod is aligned vertically over the area
mine the applicability of regulatory limitations prior to use.
of interest and is then pushed or driven into the peat until the
1.5 This practice offers a set of instructions for performing
rod reaches soil or bedrock. The thickness of the peat layer is
one or more specific operations. This document cannot replace
then measured, verified, and recorded.This process is repeated
education or experience and should be used in conjunction
in different locations covering the area of interest to assist in
determiningthethicknessandlateralextentofthepeatdeposit.
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
Rock and is the direct responsibility of Subcommittee D18.22 on Media for Plant
Growth. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2020. Published May 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1986. Last previous edition approved in 2019 as D4544–19. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D4544-20. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4544 − 20
4.2 Samplingisusuallyperformedatselectedlocationsand elevation, if known. If water is encountered during the
may be required to determine the characteristics of the peat. penetration,recordthedepthitisencounteredtothenearest0.1
m.
5. Significance and Use
8.2 Push or drive the rod into the peat.Add sections of rod
5.1 This practice is used to determine the thickness and
as necessary to measure the thickness of the peat deposit.
lateralextentofapeatdepositsuchthat,thevolumeofthepeat
Pushing or driving the rod at a constant rate assists in feeling
deposit can be calculated. When the overlying material is peat
for interferences.
and the underlying one is soil or bedrock, the depth of change
8.3 Continue pushing/driving the rods until resistance in-
may be interpreted as the thickness of peat.
creases sharply. This sharp increase in resistance indicates the
5.2 This information is useful to peat producers to evaluate
rod has reached the boundary between the bottom of the peat
the volume of the deposit for planning purposes. It is also
and top of the soil or bedrock. It may be possible to hear the
useful to peat producers and regulators in evaluating some
scraping of the rod in the underlying mineral soil, especially
ecologic functions.
when the soil is sand. Measure and
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4544 − 19 D4544 − 20
Standard Practice for
Estimating Peat Deposit Thickness
This standard is issued under the fixed designation D4544; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice uses a technique of probing to estimate the thickness of surficial peat deposits overlying mineral soil or
bedrock.
1.1.1 The resistance to penetration of a pushed or driven rod will increase sharply at the boundary of a peat layer with
underlying mineral soil or bedrock. When this abrupt change is measured in a series of probings with an appropriate spacing, the
thickness and areal extent of peat can be defined and the volume of peat may be calculated.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.
1.3 All measured and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026.
1.3.1 The procedures used to specify how data are collected/recorded and calculated in the standard are regarded as the industry
standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not
consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives;
and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations.
It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering data.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace
education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be
applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the
adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s
many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through
the ASTM consensus process.
1.6 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.
2. Referenced Documents
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D4700 Guide for Soil Sampling from the Vadose Zone
D6026 Practice for Using Significant Digits in Geotechnical Data
3. Terminology
3.1 Definitions:
3.1.1 For definitions of common terms used in this standard, refer to Terminology D653.
This practice is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.22 on Media for Plant Growth.
Current edition approved Feb. 1, 2019May 1, 2020. Published March 2019May 2020. Originally approved in 1986. Last previous edition approved in 20122019 as
D4544 – 12.D4544 – 19. DOI: 10.1520/D4544-19.10.1520/D4544-20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4544 − 20
4. Summary of Practice
4.1 A graduated, steel rod is aligned vertically over the area of interest and is then pushed or driven into the peat until the rod
reaches soil or bedrock. The thickness of the peat layer is then measured, verified, and recorded. This process is repeated in
different locations covering the area of interest to assist in determining the thickness and lateral extent of the peat deposit.
4.2 Sampling is usually performed at selected locations and may be required to determine the characteristics of the peat.
5. Significance and Use
5.1 This practice is used to determine the thickness and lateral extent of a peat deposit such that, the volume of the peat deposit
can be calculated. When the overlying material is peat and the underlying one is soil or bedrock, the depth of change may be
interpreted as the thickness of peat.
5.2 This information is useful to peat producers to evaluate the volume of the deposit for planning purposes. It is also useful
to peat producers and regulators in evaluating some ecologic functions.
NOTE 1—The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the
equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective
testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable
results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
6. Interferences
6.1 Penetration of the rod may be prevented by wood pieces in the peat deposit. This issue is usually indicated in variation from
point to point, but can also be identified by the presence of woody material at the end of the rod (Note 2. Data variation should
be examined and rechecked if this occurrence i
...