ASTM D7203-11(2017)

Standard Practice for Screening Trichloroethylene (TCE)-Contaminated Media Using a Heated Diode Sensor (Withdrawn 2022)

SIGNIFICANCE AND USE
5.1 The heated diode sensor device used in this practice is selective for HVOCs. Other electronegative compounds, such as alcohols, ketones, nitrates, and sulfides, may cause a positive interference with the performance of the heated diode sensor to detect HVOCs, but to do so, they must be present at much higher concentrations than the HVOCs.
Note 2: For volatile organic compound (VOC) screening purposes, a flame ionization detector (FID) selectively responds to flammable VOCs; a photoionization detector (PID) selectively responds to VOCs having a double bond; and a heated diode sensor selectively responds to halogenated VOCs.  
5.2 This practice can be used for screening media known to contain TCE to estimate the concentration of TCE in the media. Procedure A is to be used for screening soil known to contain TCE and Procedure B is to be used for screening water known to contain TCE. Both Procedures A and B involve measuring the TCE concentration in the headspace above a sample. From this measurement, an estimated concentration of TCE in the sample can be determined. Any TCE remaining in the sample is not measured by this practice. Any other HVOC present in the sample will be reported as TCE.  
5.3 This practice can also be used for screening the headspace above a soil or water suspected of containing HVOC contamination to indicate the presence or absence of HVOC contamination in the soil (Procedure A) or water (Procedure B). Any HVOC contamination remaining in the sample is not detected by this practice.  
5.4 Detection Limit—The detection limit of the heated diode sensor for TCE is 0.1 mg/m3 in air, based on a signal-to-noise ratio of 2. For a 25-g TCE-contaminated soil sample in a 250-mL container, the detection limit of Procedure A for TCE is 0.001 mg/Kg, assuming complete partitioning of TCE into the headspace. For a 25-g TCE-contaminated water sample in a 250-mL container, the detection limit of Procedure B for TCE is 0.001 mg/L, assuming complete partiti...
SCOPE
1.1 This practice describes procedures for screening media known to contain the halogenated volatile organic compound (HVOC), trichloroethylene (TCE). Procedure A is to be used for screening soil known to contain TCE and Procedure B is to be used for screening water known to contain TCE.  
1.1.1 Both Procedures A and B involve measuring the TCE concentration in the headspace above a sample using a heated diode sensor device. From this measurement, an estimated concentration of TCE in the sample can be determined. Any TCE remaining in the sample is not measured. Any other HVOC present in the sample will be reported as TCE.  
1.2 Procedure A can also be used for screening the headspace above a soil suspected of containing HVOC contamination to indicate the presence or absence of HVOC contamination in the soil. Procedure B can also be used for screening the headspace above a water suspected of containing HVOC contamination to indicate the presence or absence of HVOC contamination in the water. For both procedures, any HVOC contamination remaining in the soil or water is not detected by this practice.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3.1 Exception—Certain inch-pound units are provided for information only.  
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.
Note 1: The diode sensor is heated to temperatures ranging between approximately 600 and 1000 °C (see 6.1.5) and as a result could be a source of ignition.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles...

General Information

• Status: Withdrawn
• Publication Date: 31-Aug-2017
• Withdrawal Date: 01-Mar-2022
• ICS: 13.080.10 - Chemical characteristics of soils
• Technical Committee: D34 - Waste Management
• Drafting Committee: D34.01.05 - Screening Methods

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7203 − 11 (Reapproved 2017)
Standard Practice for
Screening Trichloroethylene (TCE)-Contaminated Media
1
Using a Heated Diode Sensor
This standard is issued under the fixed designation D7203; 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 1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This practice describes procedures for screening media
ization established in the Decision on Principles for the
known to contain the halogenated volatile organic compound
Development of International Standards, Guides and Recom-
(HVOC), trichloroethylene (TCE). Procedure A is to be used
mendations issued by the World Trade Organization Technical
for screening soil known to containTCE and Procedure B is to
Barriers to Trade (TBT) Committee.
be used for screening water known to contain TCE.
1.1.1 Both Procedures A and B involve measuring the TCE
2. Referenced Documents
concentration in the headspace above a sample using a heated
2
2.1 ASTM Standards:
diode sensor device. From this measurement, an estimated
D4547 Guide for Sampling Waste and Soils for Volatile
concentration of TCE in the sample can be determined. Any
Organic Compounds
TCE remaining in the sample is not measured. Any other
D5681 Terminology for Waste and Waste Management
HVOC present in the sample will be reported as TCE.
1.2 Procedure A can also be used for screening the head- 3. Terminology
space above a soil suspected of containing HVOC contamina-
3.1 Definitions—Fordefinitionsoftermsusedinthisscreen-
tion to indicate the presence or absence of HVOC contamina-
ing practice, refer to Terminology D5681.
tion in the soil. Procedure B can also be used for screening the
headspace above a water suspected of containing HVOC 4. Summary of Practice
contamination to indicate the presence or absence of HVOC
4.1 Procedure A—ToestimatetheconcentrationofTCEina
contamination in the water. For both procedures, any HVOC
soil known to contain TCE contamination, a sample of the soil
contamination remaining in the soil or water is not detected by
is added to a glass jar having an open-top cap with a
this practice.
PTFE-bonded silicone septum. At the time of screening, the
1.3 The values stated in SI units are to be regarded as temperature of the soil in the jar should be approximately 50 to
standard. No other units of measurement are included in this 120 °F (10 to 49 °C). The soil in the jar is shaken and allowed
standard. tosettlefor10min,sotheTCEcanpartitionintotheheadspace
1.3.1 Exception—Certain inch-pound units are provided for above the soil. After 10 min, the TCE concentration in the
headspace is measured using a heated diode sensor device,
information only.
which gives a numerical voltage reading. The voltage reading
1.4 This standard does not purport to address all of the
3
from the device is converted to a mg/m value of TCE in the
safety concerns, if any, associated with its use. It is the
headspace in the container. Using this value, an estimated
responsibility of the user of this standard to establish appro-
concentration of TCE in the soil in mg/Kg can be calculated.
priate safety, health and environmental practices and deter-
Any TCE remaining in the soil sample is not measured by this
mine the applicability of regulatory limitations prior to use.
practice. Any other HVOC present in the soil will be reported
NOTE 1—The diode sensor is heated to temperatures ranging between
as TCE.
approximately 600 and 1000 °C (see 6.1.5) and as a result could be a
4.1.1 To use Procedure A to screen a soil suspected of
source of ignition.
containing HVOC contamination, a sample of the soil is added
to a glass jar having an open-top cap with a PTFE-bonded
silicone septum. At the time of screening, the temperature of
1
This practice is under the jurisdiction of ASTM Committee D34 on Waste
Management and is the direct responsibility of Subcommittee D34.01.05 on
2
Screening Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2017. Published September 2017. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2011 as D7203 – 11. DOI: Standardsvolume information, refer to the standard’s Document Summary page on
10.1520/D7203-11R17. the ASTM website.
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