Ground-Water Hydrology and Water-Quality Data for Wells, Springs, and Surface-Water Sites in the Bradley-Brumalow Creek Area Near Arnold Air Force Base, Tennessee, September to December 1999

摘要

Arnold Air Force Base (AAFB) occupies about 40,000 acres in Coffee and Franklin Counties, Tennessee. The primary mission of AAFB is to support the development of aerospace systems. This mission is accomplished through test facilities at Arnold Engineering Development Center (AEDC), which occupies about 4,000 acres in the center of AAFB. Several synthetic volatile organic compounds (VOC's), primarily chlorinated solvents, have been identified in ground-water samples at AEDC. Private ground-water supplies in the Bradley- Brumalow Creeks area are hydraulically downgradient from AEDC and could be affected by transport of VOC/VPC's in the ground water at AEDC. From September to December 1999, a comprehensive investigation of the ground-water resources in the Bradley-Brumalow Creeks area was conducted to determine if VOC's from AEDC have affected local private water supplies and to advance understanding of the ground-water-flow system in this area. The investigation focused on locating and sampling all private water wells and springs located within the Bradley-Brumalow Creeks area that are used as a source of drinking water, though not all of the wells and springs sampled are currently used as a source of drinking water. Ground-water-flow directions were investigated by conducting base-flow stream measurements, measuring water levels in wells, and constructing a potentiometric-surface map of the Manchester aquifer in the study area. Data were collected from a total of 150 private and 88 monitoring wells during the course of the study. Depths to ground water were determined for 103 of the private wells and 86 of the monitoring wells. The wells ranged in depth from 14 to 167 feet deep. Water-level altitudes ranged from 946 to 1, 081 feet above sea level. Depths to water ranged from 3 to 93 feet below land surface.