EGT Laboratory has established a quality assurance program which includes written policies, procedures, and guidelines for performance, documentation, and review of laboratory activities.  These policies, procedures, and guidelines are revised and updated on a regular basis.

The test equipment in the laboratory undergoes regular internal, and when applicable, external calibration.  When applicable, these calibrations are recorded and kept on files in the laboratory.  The record for each device or system identifies the equipment, indicates the date the calibration or monitoring was performed and by whom.

Samples are stored for a period of 30 days after the issuance of the report or 90 days after the samples are received at the laboratories (whichever occurs first).  If required, the samples are available for retesting or to be sent back to the client.  Contaminated samples are sent to the client for appropriate disposal.