This standard is applicable to operators, service companies, third-party laboratories, consultants, and universities that perform molecular techniques to identify microorganisms in industrial settings, including microorganisms involved in microbiologically influenced corrosion (MIC), biogenic production of hydrogen sulfide (a process also known as souring), and biofouling in industrial settings and organizations that manage assets affected by corrosion threats. This standard should be used to select appropriate procedures for sample collection, preservation, laboratory processing, and data analysis.