| Use: | Units designed for ground water sampling are relatively new to the market. |
Description:
An electric motor rotates a set of gears which drives the sample up the discharge line. High pumping rates allow gear pumps to be used for both purging and sampling. Gear pumps are made from inert or nearly inert materials, thus suitable for sampling organics if Teflon discharge line is used.
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 |
| Maximum Depth: | Up to 100 feet. Minimum well diameter: 2 inches. |
| Production Rate: | Sample is available after a short amount of time. Gear pumps are capable of providing a continuous sample over extended time periods at 0 to 1.5 gallons per minute. Pumping rates at increased depth can be achieved through the use of auxiliary equipment. |
| 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: | Mid-range expense. |
Limitations:
ASTM Standards/EPA Methods:
No applicable ASTM standards or EPA methods are cited for this technology.
| Previous Page | Sample Access/Collection Matrix | Sample Analysis Matrix | Home | Areas of Interest | Next Page |