Occidental Chemical Corporation
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EPA Project Manager
U.S. Environmental Protection Agency - Region III
1650 Arch Street
Mail code: 3LC20
Philadelphia, PA 19103-2029
Delaware (DNREC) Project Contact
Mr. Lawrence D. Matson
Delaware Department of Natural Resources and Environmental Control
89 Kings Highway
Dover, DE 19901
Phone: (302) 739-9403
A corrective action Project Factsheet - June 2016 [PDF] for site remediation activities has been posted.
- The final remedy has been selected for this Facility and construction of the various final remedy components will begin shortly. EPA released its Final Decision and Response to Comments for the selected cleanup approach for the Facility on December 8, 2011. The selected remedy emphasizes source removal and source control through excavation, consolidation and capping of soils and sediments with concentrations of contaminants above cleanup levels. The primary sources of groundwater contamination are being and will continue to be controlled by barrier walls and free product removal, and targeted in-situ treatment will be used to address areas outside of the barrier wall containment areas to restore groundwater to drinking water standards. Certain institutional controls will be continued and additional institutional controls will be implemented to prevent current and potential future exposure to contamination and any activities that would impair the integrity of the remedy.
- In June 2012 EPA completed negotiations and entered into a RCRA Section 3008(h) consent order with Occidental Chemical Corporation. This consent order requires Occidental to implement the final remedy (or corrective measures) selected by EPA for the New Castle facility. A Corrective Measures Implementation (CMI) Work Plan describing the overall strategy for remedy construction, including a schedule and sequence of remedy design documents, was developed in coordination between EPA, DNREC and Occidental and approved by EPA on June 3, 2013. Between 2013 and 2014 EPA worked with the Facility to review remedy design documents, with the focus on starting construction of the soil remedies in August 2014. The soil remedy construction occurred between September 2014 and April 2015. This work involved the excavation of impacted soils, construction of a Consolidation Area at the former cell room location, consolidation of soils and installation of a temporary cover over the Consolidation Area and installation of vegetated soil (and gravel) covers. EPA issued a construction complete determination for the CMI report documenting this work on February 17, 2016. EPA also worked through the review of pilot study reports and the development of design documents for two in situ groundwater treatment remedies and the sediment remedy between 2015 and 2016. We expect to complete the design phase for the groundwater remedies in 2016 and to proceed with full-scale implementation in 2017.
- This former chlorine manufacturing facility is approximately 38 years old and is located on the banks of the Delaware River, along River Road, just south of Red Lion Creek. The facility is located in a heavily industrialized area, and is situated approximately three miles northwest of Delaware City, Delaware.
- The Occidental property consists of a former manufacturing area covering approximately 20 acres, several former waste lakes and landfills totaling approximately 13 acres, and marshlands totaling approximately 215 acres. The plant operated as a chlor-alkali plant from 1964 through 2005. The plant stopped chlorine production in November 2005 and stopped production of anhydrous potassium hydroxide in 2007. Decommissioning and demolition of most of the plant structures was completed in 2007 and 2008 to make the property suitable for industrial redevelopment.
- The primary contaminants that are present in the soils, surface water, sediments, and groundwater are volatile organics such as benzene, chlorobenzene, vinyl chloride; heavy metals such as mercury, manganese; and polycyclic aromatic hydrocarbons (PAHs).
- Current and additional ICs required for the Facility are described in EPA's Final Decision and Response to Comments[6 pp, 106 KB, About PDF]
- Some of the site’s key documents of interest are accessible below:
- Corrective Action Project Factsheet (June 2016)[ 1 page, 350 KB, About PDF]
- Corrective Action Project Factsheet (August 2014)[ 1 page, 341 KB, About PDF]
- EPA's Final Decision and Response to Comments [ 6 pp, 106 KB, About PDF]
- Environmental Indicator Determination - Human Exposures [9pp, 21 KB, About PDF]
- Environmental Indicator Determination - Groundwater Migration [11pp, 54 KB, About PDF]
- Corrective Action Statement of Basis [37pp, 3.5 MB, About PDF]
- Documents and reports regarding this facility also can be reviewed in person at these locations:
U.S. EPA Region III
Land & Chemicals Division
1650 Arch Street-11th Floor
Philadelphia, PA 19103
Call for an appointment.
- Submit a FOIA Request
Get instructions on how to submit a FOIA request. Additional fee for requests over 100 pages.
|Occidental Chemical Corp|
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- Decommissioning and demolition of most of the plant structures was completed in 2007 and 2008 to make the property suitable for industrial redevelopment.
- The EPA is dedicated to providing you with timely and accurate information about our work at this site. If you have any questions or concerns, please contact the EPA Project Manager:Ms. Donna McCartney(215) 814-3427