| Use: | Extraction of VOCs from soil and water samples. |
Description:
Purge and trap techniques involve the forcing of a gas (usually helium) through a sample of water or soil slurry, which entrains the VOCs. The entrained volatiles can be fed directly into the analytical instrument or can be used in combination with the sorbent trap to concentrate samples for later thermal extraction.
Analytes:
| 1. Non-Halogenated VOCs | 3. Halogenated VOCs |
Media:
| Soil: | Ground Water: | Surface Water: | Gas/Air: |
| MINIMUM | MINIMUM | MINIMUM | Not Applicable |
| Maximum Depth: | Not Applicable. |
| Production Rate: | Sample is available quickly. |
| Investigation Derived Waste Volume: | Medium volume of waste. |
| Technology Status: | Commercially available and routinely used field technology. |
| Certification/Verification: | Technology has not participated in CalEPA certification and/or CSCT verification program. |
| Relative Cost per Sample: | Mid-range expense. |
Limitations:
EPA Methods:
| 5030B | Purge-and-Trap for Aqueous Samples. |
| 5035 | Closed-System Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples. |
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