The manual provides basic, practical, field-tested guidance on the installation, operation, maintenance, calibration, and auditing of dry deposition measurement systems. The information provided is based primarily on EPA's experience in installing, operating, maintaining, and auditing the National Dry Deposition Network. It has been supplemented with information gathered from personnel involved in other acid deposition and some non-acid deposition monitoring networks, and by a review of present research and development efforts. Each section of the manual first describes the activities covered by the topic area, then it describes the quality control activities.