This site environmental report provides a synopsis of ongoing environmental management performance and compliance activities conducted during 2012. The report addresses the operations occurring on the PNNL Campus in Richland, Washington, which includes PNNL Site facilities, Battelle Land-Richland (Battelle privately owned land in Richland), Battelle-owned and-leased facilities, and DOE Office of Science-owned land and exclusive-use facilities. Environmental activities at other locations are also included if they are under PNNL's responsibility (e.g., a permitted waste storage and treatment unit on the Hanford Site). The report also includes environmental information regarding the PNNL Marine Sciences Laboratory (MSL) and Battelle Land-Sequim (Battelle privately owned land located near Sequim, Washington). It includes a description of the location and background for each facility; addresses compliance with all applicable DOE, federal, state, and local regulations and sitespecific permits; documents environmental monitoring efforts and status; presents potential radiation doses to staff and the public in the surrounding areas; and describes DOE-required data quality assurance methods used for data verification. Compliance with Federal, State, and Local Laws and Regulations in 2012 PNNL is committed to complying with all applicable federal, state, and local laws and regulations and site-specific permits. In 2012, PNNL was in compliance with applicable requirements identified below, with the exception of temporary conditions of noncompliance, which were reported to the appropriate regulatory agencies (as required) and rectified expeditiously. Pollution Prevention Program. The Pollution Prevention (P2) Program addresses PNNL's continuing effort to reduce the quantity and toxicity of hazardous, radioactive, mixed, and sanitary waste, fulfilling conditions of the Pollution Prevention Act of 1990. PNNL reduces or eliminates environmental hazards, conserves natural resources by recycling, manages energy usage, conserves water, and purchases environmentally preferable products and services (Sections 2.1.4 and 3.0).