CLU-IN | Contaminants > Dense Nonaqueous Phase Liquids (DNAPLs)

Dense Nonaqueous Phase Liquids (DNAPLs)

Detection and Site Characterization

Halogenated Monoaromatics

1,2,4-Trichlorobenzene

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 8021b, 8260b, and 8260c;

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).

References

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