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6 SAMPLE ANALYSIS TOOLS for VOCs, SVOCS, and PESTICIDES

6.2 EX-SITU ANALYSIS

6.2.19 Near IR Reflectance/Transmission Spectrometry


Use: Airborne remote sensing identification of subsurface VOC contamination.

Description:

Near infrared (IR) reflectance/transmission spectroscopy utilizes reflectance signals resulting from bending and stretching vibrations in molecular bonds between carbon, nitrogen, hydrogen, and oxygen. Calibration is required to correlate the spectral response of each sample at individual wavelengths to known chemical concentrations from laboratory analyses.

Analytes:

1. Non-Halogenated VOCs
3. Halogenated VOCs

Media:

Soil/Sediment Water Gas/Air
BETTER Not Applicable Not Applicable
Selectivity: Technique measures a part of the compound.
Susceptibility to Interference: High.
Detection Limits : 500+ ppm (soil); 100+ ppm (water).
Turnaround Time per Sample: Minutes.
Applicable To:
Screen/Identify Characterize Concentration/Extent Cleanup Performance Long-Term Monitoring
BETTER ADEQUATE BETTER BETTER
Quantitative Data Capability: Data become quantitative with additional effort.
Technology Status: Commercially available technology with limited field experience.
Certification/Verification: Technology has not participated in CalEPA certification and/or CSCT verification program.
Relative Cost per Analysis: Mid-range expense.

Limitations:

ASTM Standards/EPA Methods:

No applicable ASTM standards or EPA methods are cited for this technology.


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