Papago Park Military Reservation

Papago Park Military Reservation


The Papago Park Military Reservation (PPMR) occupies approximately 480 acres of land and is bounded by Oak Street to the north, 52nd Street to the west, and land owned by the City of Phoenix, Arizona to the south and east. PPMR serves as the Joint Forces Headquarters for the Arizona Army National Guard (AZARNG). PPMR also hosts operational National Guard units at the installation. The AZARNG leases portions of the installation to the U.S. Air Force (USAF) for administrative and training purposes. The site development includes numerous structures, open storage areas, and training areas. Structures are primarily located near the western portion of the facility.

Contaminants of Concern

Current and historical hazardous substances associated with PPMR operations include: oil and lubricants, hydraulic fluid, brake fluid, antifreeze, gasoline (leaded and unleaded), diesel, aviation fuels, solvents, paint-related materials, cleaning compounds/detergents, welding gases, pesticides, polychlorinated biphenyls (PCBs), batteries and munitions. The contaminants of concern (COCs) include metals and explosives. COCs may change as new data becomes available.

Public Health Impact

Groundwater monitor wells at the landfill are monitored semi-annually. Contamination is limited to the subsurface soil. Groundwater has not been impacted. There are no known health risks from this site.

Site Hydrogeology

PPMR lies within the West Salt River Valley area of the Phoenix Active Management Area. Since 1947, depth to groundwater in the unconsolidated alluvial sediment near PPMR has increased regional and local changes in the direction of flow. Generally, historical groundwater movement was primarily westward toward the Salt River channel. Because the PPMR is on  bedrock highlands and is largely underlain by crystalline rock, very little water, if any, is present in its vicinity. Depth to groundwater beneath the site ranges from 6 to 42 feet below grade; however, groundwater does not exist everywhere beneath PPMR.