EPA Superfund Program: STANDARD CHLORINE OF DELAWARE, INC., NEW CASTLE, DE

Superfund Site Profile

The Standard Chlorine of Delaware, Inc. Superfund Site (also known as Metachem) is three miles northwest of Delaware City. It is approximately 65 acres in size and is west of River Road (Route 9) near the south bank of Red Lion Creek. The chemical plant was built in 1965 on what was then farmland. The area is now heavily industrialized and other companies located nearby include the Delaware City Refinery and the former Occidental Chemical property. 

Standard Chlorine of Delaware, later Metachem, manufactured chlorinated benzene compounds from 1966 to 2002. Standard Chlorine sold the plant to Metachem Products, L.L.C. in 1998, but in 2002 Metachem abruptly closed and abandoned the plant and declared bankruptcy. 

The Site was listed on EPA’s National Priorities List (NPL) of most hazardous waste sites in 1987, due to a 1981 chlorobenzene chemical spill while workers were filling a railroad tanker car and another spill of 569,000 gallons of various volatile organic compounds (VOCs) spilled onto the plant property and adjacent wetlands in 1986. Chlorobenzenes from the spills have been found in groundwater, soil, creek sediments, surface water and nearby wetlands. 

The cleanup is separated into four Operable Units (OUs). OU-1 is the interim remedy for contaminated groundwater. OU-2 addresses soils and sediments contaminated by historic spills outside of the former plant area, and includes the wetlands. OU-3 is the long-term remedy for contaminated soils and related soil-gas in the area where the manufacturing plant used to stand. OU-4 is the long term remedy for contaminated groundwater.



SITE STATUS

Construction
Complete?
No
Human Exposure
Status

Under Control
Contaminated Ground
Water Status
Not Under Control
Site-Wide Ready for
Anticipated Use?
No