| Use: | Well purging and ground water sample collection. |
Description:
Submersible centrifugal pumps use an electrically-driven rotating impeller that accelerates inside the pump body, building up pressure and forcing the sample up the discharge line. Commonly constructed of stainless steel, teflon, rubber, and brass, most can also provide a continuous and variable flow rate. Small diameter submersible centrifugal pumps are available that can be used in 2-inch diameter wells and can be operated at both high flow rates for purging and low flow rates for sampling. Clay, silt, and fine sand have relatively little effect on these small diameter units.
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: | 200 feet plus. Variable speed units are limited to depths of 290 feet. Minimum well diameter: 1.75 inches for variable speed units. |
| Production Rate: | Sample is available after a short amount of time. 5 to 60 gallons per minute. Up to 8 gallons per minute for fixed speed units. |
| 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: | Most expensive. |
Limitations:
ASTM Standards:
| D 6232 | Standard Guide for Selection of Sampling Equipment for Waste and Contaminated Media Data Collection Activities. |
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