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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-97/175
ROD Date:  09/30/1997
Operable Unit(s):  06
 
Media:  Groundwater,Soil
 
Contaminant:  2-methylnaphthalene, 4-chloro-3-methylphenol, benzo(g,h,i)perylene, dibenzofuran, phenanthrene, d-benzene hexachloride, endosulfan sulfate, endosulfan aldehyde, endrin ketone, PCB 1242, 1248, and 1260, 1,2-DCA, 1,2-DCE, 1,4-dichlorobenzene, benzene, chlorobenzene, vinyl chloride, antimony, arsenic, calcium, cobalt, magnesium, potassium, sodium, arsenic, beryllium, cadmium, manganese, silicon, thallium.
 
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 portion of DAFB addressed in this document is called LF13.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.LF13 was used in the 1960s for the disposal of small quantities of general refuse and large quantities of construction rubble. From the late 1960s to the early 1990s, the site primarily received construction rubble. Buried metal was indicated by ground-penetrating radar. The dumping of rubble over the edge of the site, with subsequent covering and grading of the slope, created a 15- to 20-foot mound on the former lowlands as the landfill was advanced toward the base boundary. At present, this site is inactive and is partially covered with lumber and construction rubble such as concrete, metal, scraps, and cans.Several investigations have been conducted at LF13 over the years. Sampling conducted as a result of those investigations showed several areas of contamination.
 
Remedy:  The selected remedy for the site consists of in situ remediation of soil and groundwater using natural attenuation, institutional controls consisting of continuation of the restrictions on using on-base groundwater from the Columbia Aquifer, and groundwater monitoring.
 
Text:  View full-text ROD [ 83K ]
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