Study Area 6 Remediation Project
| Location | Jersey City, New Jersey |
| Contract Value | $6,300,000 |
| Period of Performance | June 2020 – December 2020 |
| Role | Prime Contractor |
History & Location
Study Area 6 (SA-6), located in Jersey City, New Jersey, encompasses a 25-acre commercial property. The site was used for commercial property. The site was used for commercial and industrial activities for much of the past 100 years. Historically, the area was contaminated by hexavalent chromium from Chromium Ore Processing Residue (COPR), which was stored and utilized as fill material. As part of proposed redevelopment of the site by New Jersey City University and in compliance with an Administrative Consent Order (ACO) from the PRP and the New Jersey Department of Environmental Protection (NJDEP), remedial action was implemented on the site.
Significant Project Features
- Remediation of hexavalent chromium contaminated soil at a 25-acre commercial property
- Excavation, transportation and disposal of 7,000 CY of contaminated soils from two excavation areas ranging in depths of 0-ft. to 20-ft. BGS. Soils <20ppm chromium were reused onsite and soils >20 ppm chromium were removed from the site during T+D operations
- Installed 281 LF of permanent steel sheet piling to depths of 49-ft. to 64-ft. BGS to reinforce the wester hydraulic barrier wall and installed 128 LF to provide temporary excavation support during remedial activities to depths of 45-ft. BGS
- Designed, constructed, operated and maintained stormwater controls, dewatering system (depressurization wells) and 150 gpm temporary WWTP onsite; treated 1,100,000 gallons of wastewater (as of October 26, 2020)
- Sevenson utilized Calciment to dewater and stabilize 750 CY problematic soils
- Completed site rehabilitation activities and placed backfill material in all remediated areas
- Sevenson completed over 14,000 safe workhours without a lost time incident
Project Gallery
Rooted in Remedial Construction
Expanded into Environmental Dredging
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