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Record of Decision System (RODS)



City & State:  TOBYHANNA  PA  184665086
County:  MONROE
EPA ID:  PA5213820892
EPA Region:  03
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-97/096
ROD Date:  09/30/1997
Operable Unit(s):  01
Media:  Groundwater,Soil
Contaminant:  Tetrachloroethene, trichloroethene, trans-1,2-dichloroethene, vinyl chloride.
Abstract:  The Tobyhanna Army Depot (TYAD) is located in the Pocono Mountains of northeastern Pennsylvania. The installation encompasses approximately 2 1/5 square miles. Operable Unit 1 (OU 1) consists of Areas A and B. TYAD is bordered to the north, east, and west by the Tobyhanna State Park Reserve. The area south of TYAD is owned by various residential property owners within the Village of Tobyhanna.TYAD was initially established as Camp Summerall when the government purchased 33 miles of land in northeastern Pennsylvania in 1909. In 1913, the area was used by the Army and National Guard for machine gun and field artillery training, and later was renamed Tobyhanna Military Reservation. The reservation became an ambulance and tank regiment training center and an ordnance storage depot during World War I (WWI). The installation was deactivated after WWI and remained inactive until 1932. From 1938 until after World War II (WWII), the installation was home to other military activities and it was deactivated again after WWII. The Commonwealth of Pennsylvania purchased the site in 1949, and it was maintained by the Department of Forests and Waters until 1951, when it was obtained by the Signal Corps for depot construction. Since 1962, TYAD has assumed a variety of missions, ranging from military household goods movement and storage to maintaining the Army's central file of motion pictures and distribution of audio-visual materials. Currently, TYAD is a communications-electronics maintenance and supply depot assigned to the U.S. Army Industrial Operations Command. Within OU 1, two areas of contamination are known, Area A and Area B. Apparently, no records are available concerning the specific identity or quantities of materials deposited at Area A; however, in addition to construction debris and similar types of waste material, flammable liquids may have been disposed in the pits to act as fuel source for ignition of debris. Area B was discovered after, at the suggestion of a long-time resident, an area near the southeastern corner of TYAD was examined for possible contamination and three potentially contaminated areas were found.Volatile organic compounds (VOCs) were first discovered at TYAD in 1981 in one of the on-site drinking water supply wells. An activated carbon treatment system was installed to remove contamination prior to use. Later that year, VOC contamination was found in nearby residents' wells, but it did not exceed safe drinking water standards. In 1986, more sampling indicated the residential wells contamination was exceeding standards and the Army began supplying bottled water to affected residences. An investigation into the extent and type of contamination was conducted in 1987. In 1989, the Army replaced the previously mentioned activated carbon groundwater treatment system with a permanent air stripper device to remove VOC from drinking water supply wells. In 1990, the site was added to the National Priorities List (NPL).
Remedy:  The major component of the selected remedy includes periodic groundwater monitoring for the purpose of ensuring that the strength and size of the groundwater plume continues to decrease over time, through the process of natural attenuation and institutional controls, and to ensure contaminated groundwater above maximum contaminant levels is not used for potable purposes. No further action is required for soils.
Text:  View full-text ROD [ 104K ]
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