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4 COLLECTION TOOLS

4.2 POWER-DRIVEN SOIL SAMPLERS

4.2.3 Thin-Wall Open Tube


Use: Thin-walled core samplers are most commonly used for collection of undisturbed core samples in cohesive soils, silt, and sand above the water table.

Description:

Sample collection procedures are similar to split-spoon sampling except that the tube is pushed into the soil, using the weight of the drill rig, rather than driven. The following are common thin-wall open tube samplers:

Shelby Tube: Undisturbed samples in cohesive soils, silt, and sand above the water table.
Continuous Tube: Same as Shelby tubes, except that the longer barrel is designed to operate inside the column of a hollow-stem auger (see Section 3.1.1).

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: Up to 25 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 quickly.
Investigation Derived Waste Volume: Small 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:

ASTM Standards:

D 1587 - 94 Method for Thin-Walled Tube Geotechnical Sampling of Soils.
D 4700 - 91 Soil Sampling from the Vadose Zone.
D 6169 Guide for Selection of Soil and Rock Sampling Devices with Drill Rigs for Environmental Investigations.

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