Public Health Assessment for Williams Air Force Base Mesa, Maricopa County,Arizona, Region 9. CERCLIS No. AZ7570028582

摘要

Williams Air Force Base (Williams AFB) is in Mesa, Maricopa County, Arizonaapproximately 30 miles southeast of Phoenix and just east of Chandler. A variety of hazardous wastes have been handled, stored, and disposed of at Williams AFB, resulting in soil and groundwater contamination at a number of locations. The Air Force has identified 32 areas of potential concern at Williams AFB. These sites include landfills, fire protection training areas, pesticide burial areas, former skeet ranges and firing ranges, and hazardous materials storage areas. The Former Skeet Range does not pose a current public health hazard because people are unable to access areas that contain high lead concentrations (greater than 400 milligrams per kilogram (mg/kg)) and therefore are not exposed to contaminated soil. Past exposures to lead-containing soil at the Former Skeet Range are unlikely because the area was covered by lawns, foundations, roadways, and sidewalks. An analysis of available information for the other 31 sites at Williams AFB indicates that these sites are not associated with past, current, or future public health hazards because (1) no site-related contaminants are present, (2) contaminant concentrations detected are too low to pose a public health hazard, (3) past and current exposures have been prevented by strict security measures, or (4) affected areas have been or will be remediated.