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Former Panasonic Display

State Superfund Program Site Number 356041

Site Description

Aerial view of Plasmaco building
Aerial view of Plasmaco building

This site is located in the City of Highland, Ulster County. The original on-site building was first used as an apple processing facility known as Costa Apple Products. The apple processing facility discharged process wastewater (apple wash water) through floor drains into two underground storage tanks (USTs) located northeast of the building.

In 1987 Plasmaco began leasing the facility for the manufacture of monochrome plasma displays and later developed color plasma display technology at the site. Caustics and acids were utilized in the manufacturing process. From 1988 until 1996 tetrachloroethylene (PCE) was used at the site for screen cleaning and Propaklone (containing 1,1,1-trichloroethane (TCA)) was used for electronics board cleaning.


Blowers for the sub-slab ventilation system
Blowers for the sub-slab ventilation

The site investigation found limited impacts to soil due to the former use as an apple processing plant and residual impacts to groundwater resulting from an old fuel spill. Volatile organic compounds (VOCs), PCE and TCA, were detected in soil vapor samples beneath the on-site building.

VOCs, in subsurface soil or groundwater, can move into the soil vapor (air spaces within the soil), which in turn may move into overlying buildings and affect indoor air quality. This process, which is similar to the movement of radon gas from the subsurface into the indoor air of buildings, is referred to as soil vapor intrusion. Sub-slab depressurization systems (systems that ventilate / remove the air beneath the building) were installed in the on-site building to prevent the indoor air quality from being affected by the contamination in the soil vapor beneath the building.

The cleanup was performed by the Panasonic Corporation of North America, with oversight from DEC.


In 2009 the site was sold to Prism Solar Technologies for the production of solar panels. Current operations require a combination of clean rooms, production areas, offices, shops and storage space.

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