The 7-acre Henderson Road site is located in a commercial area of Upper Merion Township, Pennsylvania. Beginning in 1975, the O�Hara Sanitation Company used the area for waste storage, waste recycling, vehicle maintenance and parking, and office facilities. Operators used a former industrial water supply well to dispose of industrial liquid wastes during the 1970s. Site activities also included disposal of wastes in an on-site landfill and on properties next to the site. These activities contaminated soil and groundwater with hazardous chemicals. Following cleanup, operation and maintenance activities are ongoing.
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LNAPL was detected in the injection well during sampling in 2013. Since the discovery, passive absorbent socks have been used to remove LNAPL from the sub-surface water.