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4 COLLECTION TOOLS

4.5 PORTABLE GRAB SAMPLERS

4.5.3 Mechanical Depth-Specific Samplers


Use: Kemerer and Van Dorn samplers are commonly used for surface water sampling. The coliwasa is most generally used for containerized water.

Description:

Mechanical depth-specific samplers are very portable and require no outside power source. A variety of types are available:

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

Can cause alterations due to aeration, degassing, volatilization, or turbulence when lowering bailer into water column.

Maximum Depth: 200 feet. Operation of mechanical samplers is difficult at increased depths. Minimum well diameter: Kemerer/Van Dorn - 1 inch; Coliwasa- 2 inches; Stratified sample thief - 1.5 inches.
Production Rate: Sample is available after a short amount of time.
Investigation Derived Waste Volume: Large 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: Least expensive.

Limitations:

ASTM Standards:

D4136-82 (1993) Sampling Phytoplankton with Water-Sampling Bottles.
D5495-94 Sampling With a Composite Liquid Waste Sampler (COLIWASA).
D 6232 Standard Guide for Selection of Sampling Equipment for Waste and Contaminated Media Data Collection Activities.

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