Landfill construction and closure are essential components of long-term industrial waste management and environmental protection. AST Environmental provides both new landfill cell construction and the capping of inactive or unregulated disposal areas. With decades of experience, AST supports industries like pulp and paper, manufacturing, and coal power in meeting regulatory requirements while minimizing environmental impact.

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Closure Systems for Inactive and Unpermitted Sites

When landfill cells reach capacity or when legacy disposal areas require remediation, closure becomes critical. AST installs engineered capping systems to reduce infiltration, prevent leachate generation, and protect groundwater. Our closure systems are built using many of the same components used in new landfill construction, tailored to the specific conditions of each site.

AST has installed multiple landfill closure systems, including:

  • Permitted municipal landfill closures
  • Hazardous waste dump site containment
  • Industrial facility legacy site caps

These projects help clients reduce long-term liability and maintain compliance with federal and state closure regulations.

Industry-Leading Earthwork and Material Handling

AST’s experience in landfill construction is backed by extensive material movement capabilities. We have excavated, transported, and placed large quantities of soil and waste across a broad range of landfill projects. Our in-house expertise, fleet, and project management systems allow for safe, efficient, and precise execution on projects of any scale.

AST delivers landfill construction and closure services that meet stringent design specs, protect environmental resources, and align with long-term operational needs.

Our Core Product Line

How It Works BOS 100® is a Trap & Treat® in situ remediation technology specifically designed to degrade chlorinated solvents. It is a unique material manufactured from high grade virgin…
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How It Works BOS 200® is a complete system effecting accelerated biodegradation of various organic compounds on an activated carbon platform that includes micro and macro nutrients, time release terminal…
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How It Works BOS 200+ is a patented in-situ remediation amendment that expands on the proven BOS 200 platform. It enhances performance at challenging petroleum-contaminated sites through advanced sorption, microbial…
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How It Works CAT 100 combines the proven BOS 100® platform with engineered biotechnology to create a next-generation in-situ remedy capable of degrading significantly more contaminant mass per unit dose.…
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How It Works FLUOROSORB is a proprietary, NSF-certified sorbent engineered by CETCO for high-capacity, long-life PFAS adsorption. It works by selectively binding a wide range of PFAS compounds—both long- and…
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How It Works FerroBlack is a custom-manufactured, reactive, abiotic form of ferrous sulfide (FeS) mineral with a “mackinawite” iron structure. It is formulated in a controlled reactor system which produces…
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AST has delivered successful remediation at hundreds of sites across the U.S., including:

• EPA Superfund and Brownfield sites
• State Voluntary Remediation Programs (VRPs)
• Military installations
• Private industrial and commercial sites

Our products and strategies are:

✅ Backed by years of field data and peer-reviewed research
✅ Used by top-tier environmental consultants and engineers
✅ Recognized and approved by regulatory agencies nationwide
✅ Supported by performance monitoring and defensible data


"We don’t just sell products — we partner with your team to help design, execute, and document a successful remediation plan."

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We’ve helped stakeholders across the world achieve cleanup goals faster, safer, and more cost-effectively — and we can do the same for you.

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