Book excerpt: The overall objective of the Phase II investigation is to define the magnitude, extent, direction, and rate of movement of identified contaminants in the ground water. A series of staged field investigations may be required to meet this objective. The contractor shall recommend any additional investigations required beyond this stage including an estimate of costs. The purpose of this task is to undertake a field investigation at Beale AFB Ca: (1) to determine the presence or absence of environmental contamination within the specified areas of investigation; (2) if contamination exists, to determine the potential for migration of these contaminants in the various environmental media; and (3) to identify potential environmental consequences and health risks of migrating pollutants based on applicable local, state and/or federal standards.