| Use: | Well development and purging; collecting ground water samples for non-sensitive parameters. |
Description:
Small diameter helical rotor pumps constructed out of inert or nearly inert materials specifically designed for monitoring use are becoming more common. An electrically driven rotor-stator assembly that moves the water through a progression of cavities to the discharge line forces a water sample up the discharge line. However, because the flow rate can not be controlled, this pump may not be suitable for sampling more sensitive chemical parameters.
Analytes:
| 1. Non-Halogenated VOCs | 5. PAHs | 9. Inorganics |
| 2. Non-Halogenated SVOCs | 6. Pesticides/Herbicides | 10. Explosives |
| 3. Halogenated VOCs | 7. Metals | 11. TPHs |
| 4. Halogenated SVOCs | 8. Radionuclides |
Media:
| Soil: | Ground Water: | Surface Water: | Gas/Air: |
| Not Applicable | MINIMUM | MINIMUM | Not Applicable |
Might not be suitable for sampling chemically-sensitive parameters. Sample could also be contaminated by coming in contact with pumping mechanism.
| Maximum Depth: | Up to 100 feet. Minimum well diameter: 2 inches. |
| Production Rate: | Sample is available after a short amount of time. 0 to 1.5 gallons per minute. |
| Investigation Derived Waste Volume: | Medium volume of waste. |
| 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 Sample: | Most expensive. |
Limitations:
ASTM Standards/EPA Methods:
No applicable ASTM standards or EPA methods are cited for this technology.
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