Dense Nonaqueous Phase Liquids (DNAPLs)
Detection and Site Characterization
- Overview
- Policy and Guidance
- Chemistry and Behavior
- Environmental Occurrence
- Toxicology
- Detection and Site Characterization
- Treatment Technologies
- Conferences and Seminars
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Halogenated Monoaromatics
1,3-Dichlorobenzene
1,3-Dichlorobenzene (1,3-DCB) is a volatile halogenated organic and as such is subject to most standard characterization and analytical techniques used on this class of chemicals. Methods such as vertical profiling, dyes, membrane interface probe, and standard GC/MS are discussed in the main section for DNAPLs detection and site characterization.
Diffusion Samplers
1,3-DCB contaminated groundwater can be sampled by diffusion samplers (ITRC 2004).
Laboratory Methods
Analysis of 1,3-DCB can be performed using standard analyses such as SW-846 methods 8021b
, 8121,
8260b, and 8260c. It is also in the suite of chemicals detected with 8270D, which is usually associated with semi-volatile chemicals.
A discussion of laboratory analytical methods for this compound is found in the Hazardous Substances Data Bank (HSDB) record for 1,3-DCB under Laboratory Methods.
Field Screening Methods
Given its Henry's Constant, 1,3-DCB may be detectable using headspace analysis with a field GC. Standards should be run to verify detection limit requirements. The photoionization energy for 1,3-DCB is 9.12 eV (EPA 1994).
1,3-DCB should be detectable in air by FTIR open-path spectroscopy (Robertson and Dunbar 2005).
References
1,3-Dichlorobenzene, CASRN: 541-73-1
Hazardous Substances Data Bank (HSDB)
TOXNET, National Library of Medicine Web site.
Guidance for Evaluating Landfill Gas Emissions from Closed or Abandoned Facilities
Robertson, T. and J. Dunbar.
EPA 600-R-05-123a, 217 pp, 2005
Standard Operating Procedure# 2114: Photoionization Detector HNU
U.S. EPA, Emergency Response Team, 16 pp, 1994
This document contains an extensive list of chemicals with their photoionization potentials.
Technical and Regulatory Guidance for Using Polyethylene Diffusion Bag Samplers to Monitor Volatile Organic Compounds in Groundwater
Interstate Technology & Regulatory Council (ITRC). DSP-3, 78 pp, 2004
Test Methods for Evaluating Solid Waste, Physical/Chemical Methods
U.S. EPA, SW-846 on line.
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