tobyhanna army depot

11 HAP ARNOLD BOULEVARD

Tobyhanna Army Depot ('TYAD') located in Monroe County, Pennsylvania is a 1,293 acre military facility. The current function of this facility is to design, fabricate, repair, and modify a wide range of communications and electronics systems. From the 1950s to early 1960s, the Army used burning and disposal areas in the southern portion of the base. Specific wastes handled included garbage, construction rubble, scrap metal, drums, and solvents. In addition, Army contractors used another nearby area as drum staging for temporary storage and disposal of building materials and other wastes generated during construction of the existing base. The Army first discovered volatile organic compounds ('VOCs') in an on-post drinking water well in 1981. In the mid-1980s, Monroe county and the state sampled nearby residential wells and identified VOC contamination. As a result, the Army provided the affected residents with an alternate water source and also conducted numerous investigations which led to the potential source areas of these contaminants. The site was then proposed to the NPL in July 1989 and placed on the list in August 1990. In 1996, two RODs were signed for TYAD. The first ROD addressed two former hazardous waste storage buildings which had been closed out under RCRA regulations. The second ROD addressed a former electrical substation. In 1994, the Army removed 1.8 cubic yards of polychlorinated biphenyl ('PCB') contaminated soils from this area. The selected remedy for both sites was "No Further Action". In 1997, a ROD was signed for the VOC-contaminated groundwater plume which had migrated offsite. The alternative chosen in the ROD was natural attenuation, institutional controls, and long-term monitoring. In 2000, two RODs were signed for TYAD. The first ROD addressed an area of unexploded ordnance ('UXO'). The alternative chosen in the ROD was institutional controls. The second ROD addressed VOC-contaminated groundwater plume associated with the closed sanitary landfill. The alternative chosen in the ROD was natural attenuation, institutional controls, and long-term monitoring. When Tobyhanna was initially listed on the NPL, there were a total of 65 AOCs to be investigated and addressed. The 5 RODs discussed above address 7 of the AOCs. In March 1998 the Army and EPA signed a closeout document to identify 35 AOCs as needing no further action. In September 1999, the Army and EPA signed a closeout document for an additional 18 AOCs that required no further action. In September 2000, the Army and EPA signed the final closeout document for the final 5 AOCs that required no further action, except that sediment contaminant levels at permitted storm sewer outfalls will continue to be monitored by the Army under the Depot's Environmental Management Program. Site Responsibility This site is being addressed through federal actions.

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