U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Dense Nonaqueous Phase Liquids (DNAPLs)

Detection and Site Characterization

Halogenated Monoaromatics


1,2,4-Trichlorobenzene (1,2,4-TCB) 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

1,2,4-TCB contaminated groundwater can be sampled by diffusion samplers (ITRC 2004).

Laboratory Methods

Analysis can be performed using standard analyses such as SW-846 methods 8021bAdobe PDF Logo, 8260bAdobe PDF Logo, and 8260cAdobe PDF Logo;

Field Screening Methods

1,2,4-TCB should be detectable in air by FTIR open-path spectroscopy (Robertson and Dunbar 2005).

Given its Henry's constant, 1,2,4-TCB should be amenable to field GC headspace testing. The photoionization potential for the chemical is 9.04 (HNU 1997).


Guidance for Evaluating Landfill Gas Emissions from Closed or Abandoned FacilitiesAdobe PDF Logo
Robertson, T. and J. Dunbar.
EPA 600-R-05-123a, 217 pp, 2005

Photoionization Characteristics of Selected CompoundsAdobe PDF Logo
HNU Systems, Inc., 12 pp, 1997

Technical and Regulatory Guidance for Using Polyethylene Diffusion Bag Samplers to Monitor Volatile Organic Compounds in Groundwater Adobe PDF Logo
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.