Background

The 448-acre Tracy Defense Depot site is located near Tracy, California. Operations at the site included repacking leaking chemical containers, fumigating shipping materials, maintaining vehicles, painting, storing chemicals, preserving metal parts, operating chemical and photographic laboratories, storing and mixing pesticides, and storing and treating liquid and solid wastes. Contaminants of concern included volatile organic compounds (VOCs) and pesticides. Cleanup, operation and maintenance activities, and monitoring are ongoing.