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Site Remediation | Environmental Construction


CODE has been involved in some of the largest and most complex remediation projects in the Country.  From installing a DDT sediment cap on the Rahway Riverbed to lowering heavy equipment and roll-off boxes into a PCB contaminated rail yard 70 feet below a busy New York City street, CODE has proven it can get the job done.  CODE is particularly proud of its involvement in the PATH Tunnel Restoration at the World Trade Center Site.  Working closely with a host of trades and some of the largest construction firms in the tri-state area, CODE provided environmental support services during reconstruction of the underground tunnels destroyed on September 11th.  

CODE is also very proud of its efforts to remediate large volumes of PCB contaminated soil and groundwater at a former copper products refinery in Maspeth, NY.  CODE’s performance on this this high-visibility, multi-phase, multi-million dollar Brownfields Redevelopment project has won high praise from involved regulators and oversight engineers.

Atlantic Industries ISRA/Brownfields Site (PCB & VOC Impacted Soils Remediation)

Excavated, stabilized, and off-site disposed of 13,000 tons of PCB-TSCA hazardous soil and 1,000 tons of non-hazardous organic-contaminated soil. Installed groundwater cutoff (sheet pile) wall and an aggressive well-point dewatering system to facilitate deep excavation. Treated pumped water by carbon filtration for NJDES permitted discharge (24/7 operation, 8.2M gallons) to the local sanitary sewer via a new manhole system constructed by CODE as part of this project.

Boarhead Farms Superfund Site (Buried Drum Removal)

Removed and handled 600+ buried drums containing chemical unknowns and acutely toxic materials (Levels A and B PPE).    Performed remedial excavation during record-setting rainfall (43+ inches).  Designed and installed dewatering system for the collection, on-site treatment, and permitted discharge of more than 750,000 gallons of construction water. 

Chemsol Superfund Site (PCB Impacted Wetlands & Soils Remediation, Buried Drum Removal)

Performed large-scale remedial earthwork project within several hundred yards of an occupied apartment complex and residential dwellings. Project featured excavation and off-site disposal of 60,000 tons of PCB-TSCA/RCRA soils, on-site treatment of 1M+ gallons of lead-contaminated water, handling hundreds of buried and investigative waste drums, soil cap installation, and wetlands area restoration with continuing O&M.

College Towers Apartment Site (Chromium Impacted Soils Remediation)

Remediated chromium contaminated soils and installed piping for improved surface drainage at an occupied, multi-story residential apartment complex. Excavated impacted soils from under walkways, beneath parking lots, and along building foundations. High pressure washed and applied chemical sealant to exposed foundation walls. Installed permanent sheet pile barrier wall. Demolished and subsequently restored asphalt pavement, concrete sidewalks, stairways and stairwells, lighting fixtures, sheds, landscaping, and other site features.

Cytec Warners Plant (Full Facility Closure)

Gutted, decontaminated, and demolished 25 buildings for a $3.5M chemical plant shutdown. Decontaminated 350,000+ SF of interior building surfaces. Supervised asbestos abatement operations. Cleaned and dismantled 30 transformers, 5 miles of overhead process piping, and 1,500 tanks and process vessels. Rigged out and salvaged equipment. Demolished a barge/unloading facility along the Rahway River. Crushed and recycled concrete, brick, masonry. Scrapped 1,400 tons of metal. Classified and disposed of 1,100 tons of RCRA hazardous waste.

Fomer I-R Phillipsburg Brownfields Site (Landfill Closure)

Installed an 18-acre soil cap over a re-graded former industrial waste disposal area using a combination of mined on-site soils and approved off site materials. Capped landfill with 18″ of imported common borrow material and 6″ of topsoil. Installed stormwater control features and permanent fencing. Modified existing monitoring wells. Installed asphalt pavement. Seeded and restored site.

Former Phelps Dodge Brownfields Site (PCB Impacted Soil and GW Remediation)

Ongoing, multi-phase, $18M+ project at a former copper products refinery along the Newtown Creek inland waterway. Excavated and off-site disposed of 20,000 tons of TSCA/RCRA mixed waste and non-hazardous soil. Demolished and crushed 2,500 tons of concrete.  Decontaminated 76,000 sf of concrete slab.  Removed 25,000 gallon UST.  Installed multi-layer armoring system on remediated creek bank and repaired bulkhead.  Installed passive collection vaults, recovery wells, piping, et. al. for a 50 gpm GTWS.

Former Rhodia Brownfields Site (PCB & VOC Impacted Soil & Streambank Remediation)

Installed stream diversions to facilitate excavation and off-site disposal of PCB and VOC impacted soil and sediment in 18 AOCs at a former industrial site bisected by a tributary of the Raritan River. Performed limited concrete demolition. Stabilized remediated stream banks. By-passed and replaced a 100-year old, 21-inch sewer main. Worked with Owner to establish and maintain a BioPile as part of a pilot test program.

Goose & Spence Farm Superfund Sites (PCB Impacted Wetlands Remediation)

Remediated and restored PCB-contaminated wetlands areas under the direction of NJDEP and USEPA at adjacent sites.  Excavated and off-site disposed of 14,000+ tons of PCB-contaminated soil and sediment.  Managed large volume (2M+ gallons) of construction water.  Provided well installation and hydrogeological services as part of a bioremediation effort conducted at the Goose Farm site under the Superfund Innovative Technology Evaluation Program.  Recommended and successfully implemented an alternate treatment technology to enhance the Spence Farm Remedial Design.

Hamburg Mill Creek Superfund Site (Lead Impacted Streambank Remediation)

Excavated lead-contaminated soils, sediment, and debris along a heavily wooded, steep stream bank immediately adjacent to an active commercial site. Installed stream diversion system to facilitate excavation. Provided permanent stabilization of the remediated stream bank (cast-in-place fabric formed concrete and permanent turf reinforcement mat). Planted 100+ trees and shrubs as part of site restoration.

NJ Superfund Site (Decommissioning, In-Situ Soil Stabilization, High Volume Earthwork)

On-going, multi-phase, multi-million dollar remedial construction project featuring AST/UST removal; full facility decontamination and demolition; surface and subsurface concrete removal and on-site crushing; storm sewer inspection and cleaning; work within a NJTA right-of-way and active utility easements; in-situ stabilization of approximately 32,000 cubic yards of impacted soil to achieve TCLP <5mg/L (lead); and high volume excavation using GPS controls.  Installed interim geotextile liner within remediated REAs.  Loaded-out and transported 50,000+ tons of stabilized soil in intermodal containers via rail for proper off-site disposal.

Operating Chemical Plant (PCB Lagoon Closure & Hot Spot Soils Removal)

Dewatered and removed PCB-contaminated sediment and sludge located in a surface lagoon at an active specialty chemical manufacturing facility. Drained lagoon and handled resultant water. Removed non-contact sediment above an existing geotexile liner by hand for on-site reuse as clean fill. Peeled back the exposed geotextle and mechanically excavated sludge using long-reach excavators. Re-installed geotextile following backfill. Later retained to excavate PCB contaminated soil from multiple wooded and wetland area hotspots.

Pharmaceutical Plant (Mercury Soil On-Site Treatment)

Managed and operated a Low Temperature Thermal Desorption (LTTD) Portable Soil Purification System at an operating pharmaceutical plant under a 5-year technical service agreement. Treated an average 40,000 tons of mercury-contaminated soil per year (200,000 tons total). Because the LTTD system was located completely outdoors in a socially and environmentally sensitive area, CODE worked under strict operating constraints that required the utmost in planning, coordination, proactive execution, and maintenance. Site-specific H&S and Air Monitoring/Emissions Control Plans were developed and implemented to ensure that the LTTD system was operated safely in full compliance with the site’s five NJDEP permits.

Rahway River (DDT Sediment Cap Construction)

This challenging project is the first of its type ever undertaken in New Jersey.  CODE worked closely with the Owner and Engineer to design-build a concrete cap and multi-layer armoring system to immobilize DDT-contaminated sediment/fill in the Rahway River.  The project featured use of underwater divers, turbidity curtains and river barges; deep sheet pile installation (360 lf wall driven in water to 40 feet); and bulkhead repair.

Sea Isle City MGP Site (Coal Tar Impacted Soils Remediation)

Multi-phase $5M+ project in seaside community that was showcased as a “model residential coal tar site remediation” at the National Utilities Conference. Excavated, stabilized, and transported 12,000+ tons of impacted soil for off-site disposal. Safely installed sheet pile to within 7 feet of adjacent residential structures. Installed water diversion and dewatering systems. Operated a mobile water treatment system with permitted POTW discharge. Performed contaminated soil excavation and load-out within a temporary enclosure under negative air. Moved and restored two multi-story houses. Actively participated in community outreach programs.

Tuckerton MGP Site (Coal Tar Impacted Soils Remediation)

Designed and installed a dewatering system to lower the site’s shallow groundwater table within the confines of a sheeted cofferdam.  Constructed recharge basins to contain treated effluent. Excavated 25,000 tons of coal tar impacted soil to depths of 16 feet for off-site disposal via thermal desorption.   Community outreach was an important element of this project as the work was performed in a residential neighborhood in close proximity to a public school.  Operations near the school were conducted during the summer to enhance safety.   Traffic and air quality controls were implemented and maintained per detailed Traffic Control, Work, and H&S Plans.