Groundwater beneath the Schering facility occurs at approximately 10 feet below ground surface across most of the site. The uppermost (overburden) aquifer beneath the facility is located in unconsolidated glacial, fill and alluvial deposits of the Elizabeth River.
At a depth of approximately 20 to 35 feet, the overburden aquifer is underlain by a fractured bedrock
aquifer. The bedrock beneath the facility is comprised of the Passaic Formation (formerly referred to as
the Brunswick formation), a shale with sandstone and siltstone interbeds. Groundwater in the bedrock aquifer generally flows northeast toward the groundwater extraction system and Elizabeth River in both the shallow and deep zones. However, in upgradient areas of the site at the southern end of the study area, flow is more vertically downward toward on-site production wells.
Targeted Environmental Media:
 Fractured Bedrock
Plume size was not specified.
Major Contaminants and Maximum Concentrations:
- Benzene (42 µg/L)
- Chloroform (12 µg/L)
- t-Butyl alcohol (574 µg/L)
- Methylene chloride (19 µg/L)
- Tetrachloroethene (30 µg/L)
- Trichloroethene (11 µg/L)
- Bis(2-chloroethyl) ether (31 µg/L)
- 1,2-Dichloroethene (5 µg/L)
- Carbon tetrachloride (3 µg/L)
No technologies selected.
- Pump and Treat
Comments:
The groundwater extraction system began operation in 1994. It recovers groundwater from both the overburden and shallow bedrock at an average design flow of 25 to 30 gallons per minute.
The above contaminant concentrations are from a 2004 sampling of the shallow bedrock. The overburden aquifer is considerably more contaminated with concentrations of various chemicals in the tens of thousands ug/L.
The cleanup goals are the New Jersey Groundwater Quality Criteria.
The pump and treat system continues operation.
Enhanced bioremediation and dual phase pumping are being considered.
http://www.epa.gov/region02/waste/fsscheri.htm
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