Operations and Procedures:
Sample Analysis
page 11b of 11

### Knowledge Review

Why is field screening performed? (Select all that apply)

1. To avoid using more labor-intensive methods
2. To provide additional credible information for sample threat assessment
3. To screen for high risk agents to protect laboratory personnel and facilities
4. To tentatively identify contaminants in the field which may reduce the time needed to confirm the existence of a contaminant
5. All of the above

| To avoid using more labor-intensive methods
| To provide additional credible information for sample threat assessment
| To screen for high risk agents to protect laboratory personnel and facilities
| To tentatively identify contaminants in the field which may reduce the time needed to confirm the existence of a contaminant
| All of the above

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page 11b of 11