Write a Quality Assurance guide for the analysis of one of the following samples; both samples are suspected of having a drug, but have not undergone any testing as of yet:

• A bag containing 100 grams of white powder suspected to contain a controlled substance (drug)

OR

• 100ml of human urine suspected to contain a controlled substance (drug)

remember to address the following topics: scope, Terminology, Testing Facility, Personnel, QA Manual Documentation, Evidence Control, Chemical Reagents, Presumptive testing and confirmatory analytical Procedures, Validation, Equipment Maintenance and Calibration, Proficiency Testing, Audits, Deficiency of Analysis/Corrective Actions, and Health and Safety