Study Area 6 Remediation Project
Location
Camden, New Jersey
Contract Value
$45,000,000
Period of Performance
April 2017 – December 2018
Role
Prime Contractor
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
Rooted in Remedial Construction
Expanded into Environmental Dredging
Remedial ConstructionEnvironmental DredgingAdditional Services