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Record of Decision System (RODS)

DOVER AIR FORCE BASE

Abstract

Site Name:  DOVER AIR FORCE BASE
Address:  RTE 113 
City & State:  DOVER  DE  19901
County:  KENT
 
EPA ID:  DE8570024010
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-97/176
ROD Date:  09/30/1997
Operable Unit(s):  08
 
Media:  Groundwater,Soil
 
Contaminant:  Groundwater, Soil, air base, military, global airlift, transport, liquid waste, disposal area, trench, solvents, waste fuel, oil, landfill, cover, VOCs, metals, sampling, borings, monitoring wells, in situ remediation, natural attenuation, restrictions, groundwater monitoring.
 
Abstract:  Dover Air Force Base (DAFB) is located in Kent County, Delaware, 3 1/2 miles southeast of the city of Dover. DAFB comprises approximately 4,000 acres of land, including annexes, easements, and leased property. The surrounding area is primarily cropland and wetlands. The portions of DAFB addressed in this document are called WP14/LF15 are in close proximity to each other, and they are collectively known as Area 1.DAFB began operation in late 1941. Since then, various military services have operated out of DAFB. The current host organization is the 436th Airlift Wing. Its mission is to provide global airlift capability, including transport of cargo, troops, equipment, and relief supplies. DAFB is the east coast home terminal for the C-5 Galaxy aircraft. The base also serves as the joint services port mortuary, designed to accept casualties in the event of war. The C-5 Galaxy, a cargo transport plane, is the largest aircraft in the Air Force, and DAFB is one of the few military bases at which hangars and runways are designed to accommodate these planes.WP14 is the site of a liquid waste disposal area. Waste activities occurred at three potential areas: a tetraethyl lead disposal area, the primary trench, and a liquid-stained area. WP14 is located in the northeast portion of DAFB. The former liquid waste disposal trench was used in the 1950s for the disposal of waste solvents, hydraulic fluids, waste oils, and other liquid wastes generated in shop operations. LF15 is the location of a former trenched landfill located 200 feet east of WP14. During the 1960s, this 2-acre area was reportedly used for the disposal of general refuse and small quantities of industrial shop wastes. When disposal activities ceased at an unknown date, the site was covered with several feet of local soil and seeded; it is currently a grass-covered field.In the mid-1980s, investigations at the two areas revealed volatile organic compounds (VOCs), metals, oil, and grease as site contaminants in groundwater and soils. Further investigations and sampling were conducted until 1994. Soil borings and monitoring wells have been installed at both areas.
 
Remedy:  The selected remedy consists of in situ remediation of groundwater using natural attenuation, institutional controls consisting of continuation of the restrictions for using on-base groundwater, and groundwater monitoring.
 
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