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-Dichlorobenzene (1,2-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

1,2-DCB-contaminated groundwater can be sampled by diffusion samplers (ITRC 2004 and 2007).

Laboratory Methods

Analysis of 1,3-DCB can be performed using standard analyses such as SW-846 methods 8021bAdobe PDF Logo, 8121Adobe PDF Logo, 8260bAdobe PDF Logo, and 8260cAdobe PDF Logo. It is also in the suite of chemicals detected with 8270DAdobe PDF Logo, which is usually associated with semi-volatile chemicals.

A discussion of laboratory analytical methods for this compound is found in the PubChem record for 1,2-DCB under Analytic Laboratory Methods.

Field Screening Methods

Given its Henry's Constant, the compound should be detectable using headspace analysis with a field GC. Standards should be run to verify detection limit requirements. The photoionization energy for 1,2-DCB is 9.08 eV (EPA 1994).

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


1,2-Dichlorobenzene, CASRN: 95-50-1
PubChem, National Center for Biotechnology Information.

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

Protocol for Use of Five Passive Samplers to Sample for a Variety of Contaminants in GroundwaterAdobe PDF Logo
Interstate Technology and Regulatory Council (ITRC) Diffusion/Passive Sampler Team.
DSP-5, 121 pp, 2007

Standard Operating Procedure# 2114: Photoionization Detector HNUAdobe PDF Logo
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 GroundwaterAdobe 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.