Level I- A bachelor's degree with at least 30 semester hours in a physical, natural, or biological science, chemistry, geology, hydrology, physical geography, epidemiology, environmental science, environmental health or civil, agricultural, environmental, geological or chemical engineering. The quality assurance activities regarding ambient air monitoring are to ensure that all data generated is demonstrably valid, representative, and defensible through the evaluation of instrument performance, validation of data collected, and review of applicable procedures.