What is the legal authority governing: "How does the soil organic carbon-water partition coefficient..."?

This standard is governed by EPA Ground Water Protection Criteria under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and 40 CFR Part 171.

What is the passing score for the EPA Pesticide Applicator exam?

The minimum passing score for the National Core Pesticide Applicator Certification exam is 70% (40 CFR § 171.103).

Pesticides In The Environment HARD EPA Ground Water Protection Criteria

How does the soil organic carbon-water partition coefficient (Koc) relate to pesticide leaching risk into groundwater?

Multiple Choice Options

A Pesticides with very LOW Koc values bind weakly to soil organic matter and leach readily into groundwater aquifers. ✓ OFFICIAL VERIFIED CORRECT ANSWER

B High Koc values indicate extreme leaching speed.

C Koc has no relationship to soil chemistry.

D Koc measures only atmospheric vapor pressure.

EPA Ground Water Protection Criteria

Official Manual Chapter: Chapter 7: Environment

Koc measures soil mobility. Chemicals with low Koc (<300 to 500 mL/g) do not adhere to soil particles and migrate rapidly with percolating water into groundwater.

Official EPA Core Study Domain Pesticides In The Environment

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How does the soil organic carbon-water partition coefficient (Koc) relate to pesticide leaching risk into groundwater?

Multiple Choice Options

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