SANITARY LANDFILL NPL SITE
ENTACT was engaged to perform remediation services at a former sanitary landfill National Priorities List site spanning approximately two acres. The project required the removal of 23,800 cubic yards of impacted soil and the disposal of over 35,000 buried drums that had been discarded at the site in the early 1970s. On this project, ENTACT: Constructed a 200-foot by 350-foot container management area pad Designed and installed a steel sheet pile wall to protect an existing soil-cement-bentonite slurry wall Constructed
BROWNFIELD REDEVELOPMENT AREA REMEDIATION
ENTACT performed remediation activities across several blocks and lots as part of a larger brownfield redevelopment project aimed at future residential use. The site was impacted by multiple industrial operations, leading to soil contamination with various hazardous substances, including polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), polychlorinated biphenyls (PCBs), hexavalent chromium, chromium ore process residue (COPR), extractable petroleum hydrocarbons (EPH), pesticides, metals, and lead. For this project, ENTACT: Designed, procured, and installed a 1,600-linear-foot, 40-foot-deep permanent vertical hydraulic control
RARE EARTH PROCESSING FACILITY RADIOLOGICAL DECOMMISSIONING
ENTACT decommissioned, decontaminated, and demolished a former rare earth minerals processing plant within a larger chemical manufacturing complex. The site received TXDSHS remediation plan approval in 2015. Through modeling and calculations, it was determined that a gradient approach to allowable soil concentrations (DCGLs) ranging from 5 pCi/g of thorium-232/Ra-226 and 83 pCi/g uranium-238, to 500 pCi/g Th-232/Ra-226 and U-238 would be used. 100,000 tons of radiologically impacted soil, sediment, and construction debris and 230,000 gallons of impacted water were removed
ACTIVE REFINERY TANK FOOTPRINT SUBSURFACE GROUND IMPROVEMENT
As part of a larger capital program, an active refinery aimed to expand its footprint for 14 tanks and four pump pads. Before construction could begin, ENTACT performed subsurface soil treatment to address soft saturated soils, reducing potential settlement of the new structures. This comprehensive ground improvement approach ensured the structural integrity of the new tank foundations and pump pads, meeting project objectives and performance criteria. On this project, ENTACT: Installed a series of eight-foot diameter soil-cement columns on a
LOGISTICS PARK DEVELOPMENT
Soil and Groundwater Remediation ENTACT completed comprehensive soil and groundwater remediation activities at a former coal-fired power generating station contaminated with polychlorinated biphenyls (PCBs), hexavalent chromium (Cr(VI)), chromium ore process residue (COPR), and extractable petroleum hydrocarbons (EPH). These contaminants were present at levels exceeding cleanup criteria, necessitating remediation for future site development. Throughout this project, ENTACT: Excavated, segregated, and characterized hazardous (TSCA and RCRA) and non-hazardous soil for off-site treatment and disposal Installed 7,500 square feet of a steel sheet
FORMER SMELTER MIXED-USE REDEVELOPMENT
ENTACT executed comprehensive remedial action activities at a former smelter site, focusing on managing and consolidating onsite debris, as well as decontaminating and demolishing the remaining smelter buildings. On this project, ENTACT: Regraded more than 1.3 million cubic yards of slag and soil, including slag piles as large as eight acres and up to 50 feet tall Distinguished five separate slag categories by color and gradation for targeted utilization in various sections of the development Removed impacted soil and sediment
CANAL SEGMENT CONTAMINATED SEDIMENT REMEDIATION
ENTACT executed the remediation of mercury and lead contaminated sediments along a 3,600-linear-foot segment of a closed canal. This project involved the construction of a temporary remediation support area and several key operational components to ensure effective sediment removal and management. Our team successfully addressed sediment contamination and enhanced the ecological and recreational value of the canal area. On this project, ENTACT: Constructed a temporary remediation support area with two dredge processing cells, a temporary water pretreatment system area, multiple
FORMER OILFIELD AND SERVICE FACILITY EXCAVATION AND BACKFILL SERVICES
Oilfield Excavation and Backfill Services ENTACT conducted remediation activities at a former oilfield and service facility to address soils impacted by volatile organic compounds (VOCs), nonaqueous phase liquids (NAPL), and BTEX (benzene, toluene, ethylbenzene, and xylene). This project effectively remediated the contaminated site, preparing it for potential future use. On this project, ENTACT: Excavated 3,268 cubic yards of impacted soils Performed self-hardening cement-bentonite slurry-supported excavation of 13,000 cubic yards of impacted soils Transported and disposed of 25,500 tons of excavated
LAKE RESERVOIR DREDGING
White Lake Dock & Dredge, a division of ENTACT, performed emergency mechanical dredging of more than 120,000 cubic yards of contaminated sediments from a remote reservoir within an active mining operation. The project was initiated in response to a critical lack of reservoir capacity that threatened ongoing mining activities and water management operations. ENTACT’s team rapidly mobilized under Mine Safety and Health Administration (MSHA) requirements and completed all dredging and material management activities in less than 100 days. Despite the
MANISTEE RIVER MGP REMEDIATION
White Lake Dock & Dredge, a division of ENTACT, executed an MGP remediation project on the Manistee River. The project included the dredging of 30,000 cubic yards of manufactured gas plant (MPG)-impacted sediment from a half mile stretch of the river. The sediments were solidified with Portland cement in lined dewatering pits prior to disposal at the landfill. This project was successfully completed while navigating the complexities of a busy waterway, ensuring environmental compliance and operational efficiency. On this project,
RIVER DREDGING PROJECT
ENTACT dredged petroleum-impacted sediments from a major river system following a spill event. The project included the construction of temporary facilities, an access haul road connecting the staging area to the United States Army Corps of Engineers (USACE) causeway and capping an upstream outfall. This comprehensive approach ensured the effective removal of contaminated sediments while restoring the river environment. Upon project completion, ENTACT had: Dredged 1,300 cubic yards of impacted sediment Dewatered and conditioned sediment with Portland cement Transported and
WASTE OIL PITS SUPERFUND SITE
ENTACT performed in-situ stabilization (ISS) of 45,000 cubic yards of hydrocarbon sludge at a former waste oil pits site located within a cypress swamp. The project faced significant challenges, including the relocation of a half-mile section of an existing stream away from the former waste pits. These efforts contributed to the effective remediation of the site while minimizing environmental impact and preserving the surrounding ecosystem. Upon project completion, ENTACT had: Performed ISS of 45,000 cubic yards of hydrocarbon sludge Excavated