navbar.gif (6338 bytes)

4 COLLECTION TOOLS

4.2 POWER-DRIVEN SOIL SAMPLERS

4.2.2 Rotating Core

Use: Rotating cores are used in the diamond coring process.

Description:

This method can utilize one of two techniques:

  1. Single-wall tubes use drilling fluid that circulates around the core that has been cut and the barrel before exiting through the bit. They are used in dense, unconsolidated, and consolidated formations.
  2. In double-wall tubes, the drilling fluid circulates between the two walls of the core barrel and does not come into direct contact with the core being cut. This method is used in friable, erodable, soluble, or highly fractured formations and can provide good recovery in unconsolidated clays and silts.

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:
MINIMUM Not Applicable Not Applicable Not Applicable
Maximum Depth: >1000 feet. Can be used up to 25 feet beyond an existing access hole to achieve greater depth below the soil surface.
Production Rate: Sample is available after a short amount of time.
Investigation Derived Waste Volume: Medium volume of waste.
Technology Status: Commercially available technology with moderate 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:

D 2113 - 83 Method for Diamond Core Drilling for Site Investigation.
D 6169 Guide for Selection of Soil and Rock Sampling Devices with Drill Rigs for Environmental Investigations.

EPA Guidance:

EPA 600/4-89/034 andbook of Suggested Practices for the Design and installation of Ground- Water Monitoring Wells.
Previous Page Sample Access/Collection Matrix Sample Analysis Matrix Home Areas of Interest Next Page