12VAC5-410-320: Quality control

There shall be a quality control program designed to ensure reliability of the laboratory data and shall include provisions for no less than:

1. Frequency and method of work performance evaluation;

2. Frequency and method of performance testing of instruments and equipment;

3. A preventive and corrective maintenance program;

4. Participation in appropriate external proficiency testing programs for the services provided.

5. Maintenance for at least two years of records documenting quality control activities.