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EPA Project Manager
Luis Pizarro, Associate Director
U.S. Environmental Protection Agency Region 3
Mail Stop: 3LC20
1650 Arch Street
Philadelphia, PA 19103-2029
Phone: (215) 814-3444
- Cleanup Status:
Corrective Action Underway
- Human Exposure Controls: TBA
- Groundwater Controls : TBA
- A supplemental remedial action designed to address source area soils containing chlorinated volatile organic compounds and 1,4-dioxane in Area 1 and Area 2 was completed in March 2014. A total of 793 cubic yards (c.y.) of source area soil was excavated in Area 2 and 1,746 c.y. in Area 1. Both excavation areas were backfilled with clean fill and the surface was restored to grade.
- The dual phase vapor extraction wells were abandoned by over drilling the well casings and then backfilling the boreholes with bentonite grout. The treatment equipment for the dual phase vapor extraction system was decommissioned.
- The aboveground components of the UVB well system in Areas 2 and 4 were dismantled and removed from the site in February 2014.
- An aquifer test scope of work (SOW) was submitted to the Maryland Department of the Environment (MDE) and U.S. Environmental Protection Agency (EPA), Region III on March 12, 2014. The SOW detailed the design, performance and data evaluation associated with aquifer testing to be conducted for purposes of determining site-specific hydraulic properties of the shallow and deep aquifers.
- Final engineering design documents for a water line extension along Twin Oaks Road and connecting four homes to the water line were approved by Anne Arundel County in December 2013
- During the week of February 10, 2014 water samples were collected at six residences with potable wells that were identified by MDE for continued monitoring. No VOCs were detected in any of the six samples above applicable groundwater comparative criteria
- Upon completion of the SOW, the facility will evaluate the hydrogeologic properties of the shallow and deep aquifers, then design and install two separate pump and treat systems to mitigate groundwater impacts.
- The facility is located in a mixed residential, industrial, and commercial area approximately 2 miles southwest of Baltimore/Washington International Thurgood Marshall Airport. The current property is comprised of approximately 25 acres.
- The facility consists of two buildings – an approximately 220,000-square-foot former manufacturing building and an approximately 20,000-square-foot former forge building near the eastern property boundary.
- The facility was constructed in 1969 by the Power Transmission Division of Koppers Company, Inc., with a forge building built in 1979. This division eventually split off from Koppers in 1986 and formed Kop-Flex, Inc. Ten years later, Emerson acquired the Kop-Flex manufacturing operations in 1996.
- The facility consists of three main areas: the administrative offices, the manufacturing building, and the former forge shop. Kop-Flex formerly manufactured flexible couplings, including precision forging, for the power transmission industry.
- Kop Flex ceased manufacturing operations in 2011 and the building is currently used only for sales and engineering support.
- The facility operated two remedies for soil and groundwater contamination since the early 2000’s: a dual-phase extraction system beneath a corner of the plant floor; and, vacuum vaporized well remediation system was installed in the former drainfield that used a system of wells to extract, treat, and return the groundwater to the aquifer in a recirculating pattern.
- The detection of site-related VOCs at the property line, which is hydraulically downgradient of the inferred source area, prompted further characterization of the groundwater quality in the aquifer. During 2012, three additional onsite monitoring wells were installed to gather additional data south and east of the source and presence of any VOC impacts upgradient of this area. In addition, a well was installed south of the Kop-Flex facility on the adjoining property to determine whether chlorinated VOCs had migrated to the hydraulically downgradient off-property area.
- In addition to an offsite investigation workplan from the facility proposing additional offsite well installation, MDE’s VCP/Brownfields program collected water samples from identified local residential wells downgradient from the site. VCP received results from offsite residential wells that identified the presence of 1,1-dichloroethene above the MCL on 12/5/2012.
- There were 17 different solid waste management units or areas of concerns identified on the site.
- Sampling and analysis in 1996 and 1997 identified volatile organic compounds (VOCs) in the soil and groundwater at the property. The VOC contamination is attributed to the historic use of degreasing solvents and the on-site discharge of wastewater.
- VOCs were detected in the soil in the vicinity of the product storage area. The groundwater contamination resulted from the discharge of caustic wastewater from a treatment system to an on-site drainage field, which operated from 1969 until 1986, and was designed to treat wastewater.
- The following VOCs were detected in this area at concentrations that exceed MCLs: 1,1,1-TCA, 1,1,2-TCA, PCE, TCE, 1,2-DCA, 1,1-DCE and vinyl chloride.
- Some of the site’s key documents of interest are accessible below:
- Corrective Action Factsheet[23pp, 21 KB, About PDF]
- All documents and reports regarding this facility also can be reviewed in person at these locations:
Maryland Department of Environment
Land Restoration Program
1800 Washington Boulevard
Baltimore, MD 21230
U.S. EPA Region III
Land & Chemicals Division - RCRA
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.
Click on a thumbnail to enlarge the photo)
- The facility ceased operation in 2011 and the manufacturing area is vacant.
- 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: Luis Pizarro, Associate Director (215)-814-3444.