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Record of Decision System (RODS)



City & State:  NEW LONDON  CT  06349
EPA ID:  CTD980906515
EPA Region:  01
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-97/162
ROD Date:  09/18/1997
Operable Unit(s):  06
Abstract:  The United States Navy Submarine Base - New London (NSB) consists of approximately 547 acres of land and associated buildings in southeastern Connecticut in the towns of Ledyard and Groton. NSB is situated on the east bank of the Thames River, approximately 6 miles north of Long Island Sound, and is bounded to the east by Connecticut Route 12, to the south by Crystal Lake Road, and to the west by the Thames River. In 1867, the State of Connecticut donated a 122-acre parcel on the east bank of the Thames River to the Navy. The Navy began using the property in 1868 when it was officially designated as a Navy Yard. The property was then used as a mooring site for small craft and obsolete warships, and as a coaling station for the Atlantic fleet.The Navy designated the site a Submarine Base in 1916. During World War I, facilities at the base were expanded extensively; 6 piers and 81 buildings were added. In 1917, a submarine school was established and the Submarine Medical Center was founded one year later.NSB experienced another period of growth during World War II. Between 1935 and 1945, the Navy built in excess of 180 buildings and expanded NSB from 112 to 497 acres through the acquisition of adjacent land.The growth of NSB continued after World War II. The Medical Research Laboratory was established in 1946. In 1968 the status of the Submarine School was changed from an activity to a command and became the largest tenant on the base. The Naval Submarine Support Facility was established in 1974 and the Naval Undersea Medical Institute was established in 1975. NSB currently consists of over 300 buildings on 547 acres of land.NSB currently provides a base command for naval submarine activities in the Atlantic Ocean. Additionally, NSB includes housing for Navy personnel and their families, submarine training facilities, military offices, medical facilities, and facilities designed for the maintenance, repair, and overhaul of submarines.Land use adjacent to the NSB is generally residential or commercial. Residential developments border the NSB to the north and extend north into the Gales Ferry section of Ledyard. Property along Route 12 to the east of the NSB consists of widely spaced private homes and open, wooded land. Further south on Route 12, development is a mixture of commercial and residential properties that include automobile sales and repair facilities, convenience stores, restaurants, a church, and a gasoline station. Private residences and an automobile service station are located along the south side of the NSB along Crystal Lake Road. Further south is housing for Navy personnel.The Groton Water Department supplies potable water to NSB. The primary sources of the Groton water supply are reservoirs that are supplemented with wells. The water supplies are located within the Poquonnock River Watershed, located east of NSB, which is not within the NSB watershed. Groundwater at NSB is not used for potable water.This remedy relates to soil at the Spent Acid Storage and Disposal Area (SASDA) within the NSB. The SASDA is located in the southeastern section of NSB. The SASDA is a tank that was used for temporary storage of waste battery acid before and after World War II. The batteries were placed on a concrete pad next to the tank where some acid occasionally leaked. The SASDA is located in a paved parking lot in a well-developed portion of the NSB. The former tank and the surrounding soils encompass approximately 1,000 square feet.A removal action was completed in January 1995. The tank, 200 cubic yards of lead-contaminated soil, contaminated pavement, and tank contents were removed. The excavated area was backfilled with clean borrow and covered with bituminous pavement.
Remedy:  No further action is necessary to protect human health and the environment.
Text:  View full-text ROD [ 29K ]
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