FORMER MGP SITE
ENTACT implemented in-situ solidification and stabilization at this former manufactured gas plant (MGP) to address impacted materials and prepare the site for redevelopment. Through two phases of work, we effectively managed environmental conditions while meeting our Client’s schedule and budget objectives. Upon project completion, ENTACT had: Demolished and removed existing structures, with off-site disposal and recycling of building slabs and subsurface materials Collected, managed, treated, and discharged MGP contact water Removed, reinstalled, or protected utilities and plugged and grouted abandoned
FORMER FACTORY REMEDIATION AND REDEVELOPMENT
ENTACT successfully remediated a former factory site designated for residential and retail redevelopment, addressing contamination from multiple sources, including arsenic and lead. The property is situated in a dense urban area, divided by a city street and bordered by city transit and right-of-ways (ROWs). Upon project completion ENTACT had: Treated and disposed of 44,000 tons of non-hazardous material Stabilized and disposed of arsenic, volatile organic compound, and contaminant-impacted soils Excavated and disposed of chromium-impacted hot spot areas Utilized benching and
FORMER WASTE OIL RECOVERY FACILITY NATIONAL PRIORITIES LIST (NPL) SITE
ENTACT was engaged to perform remediation and geotechnical construction services at this NPL Superfund site, addressing contaminants across 150 acres formerly occupied by a waste oil recovery facility. The site featured numerous aboveground storage tanks, two API separators, a large, elevated sludge impoundment, and a small cemetery, bordered by a bay, a closed waste disposal site, a city landfill, and undeveloped marsh and wetlands. To optimize the project timeline, ENTACT implemented a phased approach that allowed construction to proceed concurrently
INDUSTRIAL COMPLEX REMEDIATION AND REDEVELOPMENT
ENTACT performed comprehensive remedial activities at a 2,200-acre industrial complex to prepare the site for mixed-use redevelopment. Leveraging our internal technical and treatability expertise, we developed a remediation solution aimed at reducing the site’s high moisture levels to meet specific objectives. This involved geotechnical evaluations, soil mixing, free draining, dewatering, and reagent assessments of source materials. To maintain an efficient schedule, we executed critical activities concurrently throughout our phased, multiyear approach. Upon project completion, ENTACT had: Removed 3.9 million cubic
FLY ASH IMPOUNDMENT CLOSURE AND DAM MODIFICATION
ENTACT undertook a multiyear phased approach for the closure of a 300-acre wet fly ash impoundment. The project commenced with the drainage of surface water, utilizing pumping and temporary drainage channels to direct water to an area behind the main dam. As surface water was managed, we excavated the exposed fly ash and relocated or regraded the surface to achieve the required subgrade elevations across the site. This careful and coordinated approach ensured effective stormwater management and successful project completion.
ACTIVE REFINERY PROCESS UNIT PROPOSED LOCATION
ENTACT performed soil remediation and ground improvement efforts to address low-pH soils resulting from a sulfuric acid spill at the refinery. Stabilization of the ground was essential to support the construction of a new process unit at the site. These remediation efforts were crucial for ensuring the structural integrity needed for the upcoming development at the refinery. On this project, ENTACT: Performed in-situ solidification on 86,000 cubic yards of material Enhanced soil strength using a blend of granulated ground blast
FORMER WOOD PRESERVING SITE REMEDIAL ACTION
ENTACT was engaged to remediate an 84-acre wood preserving site added to the National Priorities List in 1997 due to contaminated groundwater, soil, and sediment resulting from more than 30 years of wood treating operations. Previous cleanup phases had been insufficient, leading to the selection of in-situ solidification (ISS) as the revised remedy. On this project, ENTACT: Conducted an ISS demonstration prior to full-scale implementation Removed, stockpiled, and replaced clean overburden soils Executed ISS on 15,400 cubic yards of non-aqueous
COKE AND GAS SITE UPLANDS REMOVAL ACTION
ENTACT conducted a non-time-critical removal action at the 45-acre uplands area of a former coke and gas site to prepare for commercial redevelopment. This project involved multiple phases to ensure effective remediation and site readiness. Upon project completion, ENTACT had: Demolished and removed of 38,000 cubic yards of surface and subsurface structures Resized, crushed, and screened 53,000 cubic yards of stockpiled debris for reuse onsite Removed 3,900 wooden pilings Excavated 30,000 cubic yards of non-affected overburden soil for onsite stockpiling
FORMER MANUAFACTURED GAS PLANT (MGP) SITE REMEDIAL ACTION
ENTACT undertook the remediation of a former MGP site situated in an urban area, adjacent to light industrial and commercial developments, as well as undeveloped land and a shallow river. Historical releases of MGP residuals had contaminated soil and groundwater, leading to the migration of pollutants to the riverbank, affecting an isolated sediment area. During the project, ENTACT: Developed a treatability study Demolished concrete footings and slabs Excavated and disposed of 10,500 tons of impacted soil off-site Installed180 linear feet
FISHING CREEK SOUTH JETTY REHAB AND MAINTENANCE DREDGING
This project was performed by White Lake Dock & Dredge, a division of ENTACT. Scope of work involved both dredging and stone jetty improvements for the U.S. Army Corps of Engineers. All work was conducted in a shallow tidal environment, ensuring compliance with environmental standards. Throughout this project, our team: Dredged more than 30,000 cubic yards of sediment from inner and outer harbors and conveyed it to a confined disposal facility (CDF) Graded and replaced weir box outlet control structures
BAYFRONT REDEVELOPMENT
ENTACT completed a comprehensive multi-phase remediation of a 100-acre industrial site located near a river, preparing it for mixed-use redevelopment. This project focused on the removal of hazardous materials, groundwater management, and site restoration to ensure compliance with environmental standards. Phase 1: Central Area Remediation The first phase spanned three and a half years and concentrated on the central portion of the site. This phase involved the excavation and removal of significant amounts of chromium ore process residue (COPR) and
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