Remediation & Tanks – Case Studies
Former Lockbourne Air Force Base – landfill remediation
EMS was contracted to manage, excavate, transport and consolidate approximately 400,000 cubic yards of contaminated soil and general trash debris into an engineered onsite consolidation cell. The design called for placement of contaminated soil and waste in compacted layers, then for the installation of an impervious clay cap system, topsoil placement and seed stabilization, and the installation of gas vents. This consolidation cell also had a perimeter leachate collection system installed to collect any water infiltration for offsite removal activities. The work area was located in a densely wooded area that had to be cleared prior to excavation and consolidation efforts. Once clearing was completed, temporary sediment and erosion control measures were installed, and when the consolidation cell was near completion, EMS constructed several sediment and water retention ponds, permanent access roads and permanent perimeter fencing. EMS also backfilled all onsite excavations with compacted clay fill. This project involved close coordination with the Louisville District of the U.S. Army Corps of Engineers. This project, during its course, nearly doubled in size due to additional uncovered wastes identified in the field. EMS was able to quickly adjust field activities and consolidation cell engineering designs to accommodate the additional volume of material encountered.
Former manufactured gas plant (MGP) facility – site remediation
The objective of this project was to remove all soils impacted as a result of historic gas manufacturing on this 1.06-acre site while protecting utilities in the work area and the health and safety of site workers as well as residents in the surrounding neighborhood. EMS removed a total of 19,000 tons of contaminated soil, placed 10,000 cubic yards of backfill and placed topsoil and seed across the site. This project was completed on time and under budget despite exceptionally wet weather and related challenges associated with backfill placement and compaction.
Former automotive manufacturer – liquid boot gas vapor barrier
Due to the site history and compliance standards required under the Ohio Voluntary Action Program (VAP), approximately 240,000 square feet of 60-mil liquid boot gas vapor barrier was installed as part of a passive vent system to mitigate potential residual vapors and to meet residential indoor air standards. In total, EMS installed more than 16,000 linear feet of 2 inch diameter vent pipe and more than 240,000 square feet of 60-mil liquid boot liner.
Former dry cleaner – site remediation
On an especially expedited schedule, EMS worked closely with the environmental consultant to characterize and classify contaminated soil in several identified areas across the site into five distinct disposal categories. EMS excavated and disposed of 6,800 tons of non-hazardous soil, 700 tons of hazardous waste soil for treatment or direct landfill and 388,000 pounds of hazardous waste soil for incineration. Due to the close proximity to neighboring properties, EMS utilized vapor suppressing foam during certain phases of the project.
In conjunction with soil removal activities, EMS placed more than 7,700 tons of engineered fill across the site with construction-grade compaction. EMS also removed 200 tons of subsurface concrete structures and 10,000 gallons of contaminated groundwater. In addition, EMS conducted air knifing in the right-of-way in order to remove contaminated soil while protecting underground utilities in the area. This $1 million CORF project was completed by EMS on schedule (23 working days from start to finish), under budget and to the complete satisfaction of the environmental consultant and property developer.
Natural gas distributor – site remediation
EMS was contracted to excavate and remove approximately 4,700 tons of contaminated soil from this project site. The work area was located on a steep slope, which required careful planning and execution throughout the project to ensure the safety of all personnel on site to prevent landslides and maintain erosion control. In addition to the primary soil removal activities, this project included the construction of a temporary road for truck access to the site, a spring drain, a rock filter outlet and permanent fencing around the site after work completion.
Former industrial facility – site remediation and tank removal
Before demolition of the existing five-story building, EMS mobilized to identify, containerize, transport and dispose of a wide variety of hazardous waste inside the former industrial facility. Immediately following demolition, EMS mobilized to remove 90,000 gallons of petroleum-contaminated water from three 20,000-gallon USTs and one 42,000-gallon UST. EMS then excavated, crushed and removed the four USTs from the site under the direction of our in-house certified tank installer.
Prior to removal of soil, lab analysis indicated elevated levels of PCBs in the soil at two areas of the property. This discovery resulted in 2,500 tons of low-level PCB-contaminated soil being hauled to a non-hazardous disposal facility and 400 tons of high-level PCB-contaminated soil being hauled to a TSCA disposal facility. After receipt of analytical results, EMS immediately submitted waste profiles for rush approval and was able to remobilize to the site the next day to begin removing both hazardous and non-hazardous soil. The fast turnaround minimized the costs associated with standby time and kept the site redevelopment project on schedule. From other areas on the site, an additional 1,300 tons of petroleum-contaminated soil was hauled for bioremediation.
Former landfill – wetland construction
EMS was contracted to construct two bioremedial wetlands for the treatment of leachate seeps from a former landfill. A total of 3.50 acres of area was cleared to provide for the installation of two separate wetland features. Erosion and water filtration controls were installed to maintain water quality, as both wetland areas were constructed in conjunction with existing streams. Excavation of 3,000 cubic yards of unusable soils and overburden was required prior to initial grading of the areas. EMS imported, placed and compacted a total of 4,500 cubic yards of soil to build the required berms and basin areas. Following the grading process, the basin then was lined with a welded 40 mil geomembrane liner and covered with native soils excavated from other areas on site. The wetlands were then planted with native wetland plant material for the filtration of the seep water prior to discharge through an engineered drainage system. All adjacent areas were restored with native grass species.
Commercial property development – site remediation and in-situ soil treatment
In accordance with a Rule 13 permit and the Ohio EPA Voluntary Action Program, EMS mobilized to this former manufacturing facility and removed 38,000 tons of soil contaminated with petroleum and heavy metals. Of the total, 3,000 tons of soil contained lead in excess of hazardous waste standards. EMS stabilized the lead-contaminated soil in place (in-situ) whereby delivering significant savings compared to costs that would have been associated with off-site disposal as hazardous waste.
Former automotive manufacturer – site remediation and tank removal
EMS was contracted to remove eight USTs, five oil/water separators and 200 tons of petroleum contaminated soil from the project site. The projected two-week project was completed in six days. EMS delivered a 25 percent savings to the customer compared to bids received from local contractors from the Baltimore area. EMS remobilized during a subsequent phase of the project to excavate and remove 2,000 tons of lead-contaminated hazardous waste soil. EMS completed this soil removal on schedule and under budget.
Commercial property development – site remediation and tank removal
South Bend, IN
EMS initially mobilized to the site with a one-day notice to remove three underground storage tanks (USTs) of unknown size at a 60-acre property development site. During the following three months, EMS assisted the developer and its consultant with the removal of six USTs, two oil water separators, five septic tanks, more than ten large underground catch basins, more than 2,000 tons of petroleum-contaminated soil, hundreds of hazardous waste items, and PCB ballasts and hundreds of fluorescent light bulbs. EMS’ efforts at the site enabled the general contractor to stay on schedule despite encountering several unexpected environmental issues at the site.
Former industrial facility – site remediation and tank removal
As a subcontractor to the prime demolition contractor, EMS managed all environmental aspects of this Ohio EPA Voluntary Action Program (VAP) project which involved removal of 1.1 million gallons of PCB-contaminated water, more than 9,000 tons of PCB-and petroleum-contaminated soil/concrete/debris and four USTs from dozens of identified areas across the 20-acre project site. EMS coordinated its activities with demolition activities and worked closely with the environmental consultant to characterize newly discovered areas of contamination and expedite removal activities.
Superfund site – site remediation
Boston Heights, OH
EMS was contracted by a large environmental services company to provide all aspects of site maintenance, erosion control, engineering control, construction and remedial action plan implementation in several phases across a 40-acre project site during the course of two years. By approaching the multi-million dollar project from a partnering perspective, EMS provided fully transparent time and material (T&M) pricing and delivered substantial cost savings as well as technical expertise that enabled the customer to meet its obligations by the most efficient and cost-effective means possible.
Data center facility – tank installation
EMS certified personnel installed three 30,000-gallon double wall fiberglass underground storage tanks, 1,100 feet of double-walled underground fuel piping, a filtering/polishing system to maintain high-quality fuel readiness and an electronic inventory and leak detection system to monitor the underground tanks and piping. The fuel system was substantially completed in eight weeks and under the estimated budget.
Superfund site – site remediation and landfill cap
EMS conducted in-situ stabilization of 10,000 tons of lead-contaminated soil at the site. After being treated to below regulatory standards, the soil was then excavated and transported to a non-hazardous waste landfill. We then imported thousands of tons of clay and graded the site to specifications developed by the environmental consulting firm in preparation for installation of a landfill cap. EMS then installed the landfill cap and liner as well as all associated engineering controls. One notable obstacle on this project was the unusually large amount of rainfall encountered at the job site. EMS worked through these challenges and the project was completed to the consultant’s complete satisfaction.
Former industrial property – remediation system installation and in-situ soil treatment
EMS successfully installed air spare, soil vapor extraction (SVE) and groundwater hydraulic barrier in-situ remediation systems according to the specifications, removed perchloroethylene (PCE)-contaminated soil to the point of compliance, backfilled all excavations with construction-grade compaction and restored all surface features across the site.
This project included removal of 7,320 tons of soil with non-hazardous PCE concentrations and 1,430 tons of C&D debris as well as treatment/removal of 2,360 tons of soil with initial PCE concentrations above the hazardous waste standard. Chemical oxidation treatment chemicals were mixed in-situ with the contaminated soil with initial PCE concentrations above the hazardous waste standard. Mixing took place in lifts using an excavator and mixing attachments. Mixing operations were conducted in various levels of personal protective equipment (PPE) from Level D PPE to Level B PPE. Vapor suppressing foam was utilized as needed based on air monitoring in order to prevent any impact on neighboring properties.
Former lead smelter – site remediation and in-situ soil treatment
EMS was contracted to provide remediation of 8,552 tons of soil in 29 remediation zones with levels of lead contamination in excess of hazardous waste standards. EMS developed a detailed sampling plan to characterize the soil in each remedial excavation area. In-situ treatment allowed for subsequent excavation and off-site disposal of the treated soils as non-hazardous waste. Compared to off-site disposal of the lead-contaminated soil as hazardous waste, in-situ treatment resulted in cost savings to the owner in excess of $400,000.
Former coke plant – site remediation and demolition
The objective of this project was to demolish remaining above-grade and below-grade concrete structures and to remediate multiple impacted areas across the 30-acre site. Approximately 30,000 tons of concrete was removed and crushed, 3,500 cubic yards of heavily impacted soil was excavated and disposed. Ten thousand cubic yards of lightly impacted soil was consolidated according to the engineer’s remediation plan, and approximately 25,000 cubic yards of clean borrow material was placed according to the grading plan.
Dry cleaning facility – site remediation and in-situ soil treatment
EMS was contracted to clean up chlorinated solvent-contaminated soil. The scope of work included the clearing and grubbing of the hill-slope to be remediated, removal of clean overburden material, in-situ treatment and removal of 4,200 tons of impacted soil, backfill and restoration of the remediation area to specified grade, installation of 515 linear feet of groundwater interceptor trenches and the installation of a 200-linear-foot retaining wall to mitigate an active landslide. In-situ treatment of the chlorinated solvent-contaminated soil resulted in cost savings in excess of $375,000.
Medical center – tank installation
EMS certified personnel installed two 30,000-gallon double-wall fiberglass underground storage tanks, 550 feet of double-walled underground fuel piping, a filtering/polishing system to maintain high-quality fuel readiness and an electronic inventory and leak detection system to monitor the underground tanks and piping. EMS completed this project within the estimated budget and within the strict time frame required by a fast-track construction schedule.
Former automotive manufacturer – site remediation and in-situ soil treatment
EMS was contracted to provide removal, characterization and disposal of all building residuals and universal wastes; selective demolition of slab structures and underground structures; environmental remediation in 20 remediation zones; import, backfill and compaction activities; site-wide grading activities and select remediation of former lagoons/wetlands. EMS remediated the entire site, removing and disposing of a total of approximately 50,000 tons of impacted soil, in-situ treating approximately 6,500 tons of VOC-impacted soil, beneficially reusing approximately 10,000 tons of excavated soil and importing/placing approximately 157,500 tons of fill material.
Automotive manufacturer – industrial services and tank removal
EMS was contracted to remove seven underground storage tank (UST) systems, including three 25,000-gallon tanks as well as a canopy and surface asphalt/concrete. In a separate area of this project site, EMS provided sewer jetting of 2,800 linear feet of piping and industrial cleaning of more than 20,000 square feet of flooring, pits and trenches.
Former industrial facility – site remediation and demolition
EMS was contracted to provide removal and disposal of all building foundations, slabs, basements, vaults and retaining walls, contaminated soil and existing utility lines. EMS removed a total of more than 4,000 cubic yards of subsurface concrete and 49,000 tons of contaminated soil. The entire site was backfilled with various fill materials and graded per the specifications.
Department of Public Service – tank removal and demolition
This project involved the removal of two 12,000-gallon underground storage tank (UST) systems including the evacuation of more than 56,000 gallons of water from the tank cavity. Associated demolition activities included 29,925 square feet of asphalt pavement, 84,330 square feet of concrete pavement, a cinder block building, fuel island canopy/foundations, 18 bollard posts, 460 linear feet of concrete curb, 1478 linear feet of chain link fencing, 16 concrete foundations, 500 linear feet of concrete wall and footer foundations. EMS completed the entire project in the allotted four-week time period while staying under the estimated budget.
Municipal site – site remediation and in-situ soil treatment
EMS mobilized to the site to stabilize 600 tons of lead-contaminated soil in-situ prior to removal for nonhazardous waste disposal. EMS delivered cost savings in excess of 50 percent compared to removal of the material as hazardous waste.