This module, one of 25 on vocational education training for careers in environmental health occupations, contains self-instructional materials on calibrating personal air monitoring devices. Following guidelines for students and instructors and an introduction that explains what the student will learn are three lessons: (1) naming each part of the personal air monitoring assembly or sampling train, and the parts of the soapbubble meter calibration apparatus; (2) assembling and preparing the sampling train and soapbubble meter for calibration; and (3) calibrating a sampling train, including a personal air sampling pump and filter cassette. Each lesson contains objectives, recommended methods and locations for practice, performance criteria, equipment and supplies to perform a task, detailed step-by-step instructions for learning a task, and performance exercises. Two performance tests cover assembling and preparing equipment for calibration and calibrating a sampling train. (CT)