ASTM D7203-06e1

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Designation: D7203 – 06
Standard Test Method for
Screening Trichloroethylene (TCE)-Contaminated Media
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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.
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´ NOTE—Eq 24 was corrected editorially in March 2007.
1. Scope 2. Referenced Documents
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1.1 This test method describes procedures for screening 2.1 ASTM Standards:
media known to contain the halogenated volatile organic D4547 Guide for Sampling Waste and Soils for Volatile
compound (HVOC), trichloroethylene (TCE). Procedure A is Organic Compounds
to be used for screening soil known to contain TCE and D5681 Terminology for Waste and Waste Management
ProcedureBistobeusedforscreeningwaterknowntocontain
3. Terminology
TCE.
1.1.1 Both Procedures A and B involve measuring the TCE 3.1 Definitions—Fordefinitionsoftermsusedinthisscreen-
ing test method, refer to Terminology D5681.
concentration in the headspace above a sample using a heated
diode sensor device. From this measurement, an estimated
4. Summary of Test Method
concentration of TCE in the sample can be determined. Any
4.1 Procedure A—To estimate the concentration of TCE in
TCE remaining in the sample is not measured. Any other
a soil known to contain TCE contamination, a sample of the
HVOC present in the sample will be reported as TCE.
soil is added to a glass jar having an open-top cap with a
1.2 Procedure A can also be used for screening the head-
PTFE-bonded silicone septum. At the time of screening, the
space above a soil suspected of containing HVOC contamina-
temperature of the soil in the jar should be approximately 50 to
tion to indicate the presence or absence of HVOC contamina-
120 ºF (10 to 49 ºC). The soil in the jar is shaken and allowed
tion in the soil. Procedure B can also be used for screening the
tosettlefor10min,sotheTCEcanpartitionintotheheadspace
headspace above a water suspected of containing HVOC
above the soil. After 10 min, the TCE concentration in the
contamination to indicate the presence or absence of HVOC
headspace is measured using a heated diode sensor device,
contamination in the water. For both procedures, any HVOC
which gives a numerical voltage reading. The voltage reading
contamination remaining in the soil or water is not detected by
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from the device is converted to a mg/m value of TCE in the
this test method.
headspace in the container. Using this value, an estimated
1.3 This standard does not purport to address all of the
concentration of TCE in the soil in mg/Kg can be calculated.
safety concerns, if any, associated with its use. It is the
Any TCE remaining in the soil sample is not measured by this
responsibility of the user of this standard to establish appro-
test method. Any other HVOC present in the soil will be
priate safety and health practices and determine the applica-
reported as TCE.
tion of regulatory limitations prior to use.
4.1.1 To use Procedure A to screen a soil suspected of
NOTE 1—The diode sensor is heated to temperatures ranging between
containing HVOC contamination, a sample of the soil is added
approximately 600 and 1000 ºC (see 6.1.5) and as a result could be a
to a glass jar having an open-top cap with a PTFE-bonded
source of ignition.
silicone septum. At the time of screening, the temperature of
the soil in the jar should be approximately 50 to 120 ºF (10 to
49 ºC).The soil in the jar is shaken and allowed to settle for 10
min, so the HVOC can partition into the headspace above the
soil. After 10 min, the heated diode sensor device is used to
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This test method is under the jurisdiction of ASTM Committee D34 on Waste
Management and is the direct responsibility of Subcommittee D34.01.05 on
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Screening Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2006. Published November 2006. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2005 as D7203-05. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D7203-06E01. the ASTM website.
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D7203 – 06
screen the headspace in the container. The numerical voltage 5.3 This test method can also be used for screening the
reading from the device indicates the presence or absence of headspaceaboveasoilorwatersuspectedofcontainingHVOC
HVOC contamin
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