Superfund Site: STANDARD CHLORINE OF DELAWARE, INC., NEW CASTLE, DE
Superfund Site Profile
The Standard Chlorine of Delaware, Inc. 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. Standard Chlorine of Delaware 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.
Since 2002, EPA and DNREC have maintained complete custody and control of the Site. EPA conducted a time critical removal from 2002-2006, during which time the facility was operated to reduce the volume of chemicals to be disposed. The process equipment, tanks and piping were then dismantled and either salvaged or scrapped – none of the former facility remains. Since 2007, the EPA has been operating an interim groundwater remedy to treat contaminated groundwater at the Site. EPA has also constructed a multilayer cap, with a gas collection and treatment system, over the former plant area. Next steps at the site include addressing soils and sediments contaminated by historic spills outside of the former plant area, and includes the wetlands, and a long term remedy for contaminated groundwater.
TOPICS IN FOCUS
Check out some videos from the work at the Standard Chlorine of Delaware Site!
A "behind the fence" look at construction of the Multi-Layer Cap
The Clay Layer at the Standard Chlorine of Delaware Site
Vapor Capture--remediation inside the cap!
What is a geomembrane?