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Below is a list of frequently asked questions. Click each dropdown to view the answers.

Utility Ash Management

With over 30 years of proven experience, Charah Solutions is the industry leader in ash excavation and provides an unparalleled combination of extensive ash pond familiarity and breadth in service capabilities that includes a full suite of coal combustion residuals (CCR) management and recycling, environmental remediation, and outage maintenance services. Charah Solutions operates on a national scale that includes longstanding relationships with leading utility companies and independent power producers. Further, Charah Solutions has established a history of solving our customers’ most complex environmental challenges and has received numerous award recognitions for our exceptional quality, safety, and compliance record.

Yes, in fact, it’s our market-leading ash management capabilities coupled with our proprietary ash beneficiation technology and byproduct sales platform supported by our unique MultiSource® materials network that includes nearly 40 nationwide locations with international sourcing and distribution as well as a national network of barge, rail and truck services that enables us to offer a full suite of services to the power generation customers in a compelling, cost-effective way.

Whether it is closure by removal (CBR) or cap-in-place, no two pond closures are exactly the same. Charah Solutions has vast experience in managing ash ponds. We can provide our customers with hands on expertise in compliance operating strategy and selecting a method to manage the coal ash safely and in compliance with current regulations, and in an economical manner.

The cap-in-place method of ash pond closure involves capping the coal combustion residuals in an existing ash pond with the installation of a compacted geocomposite clay liner and a high density polyethylene cap liner, followed by a soil cover and vegetation for stabilization purposes. In a closure by removal (CBR), the coal combustion residuals are excavated and taken to a lined landfill for disposal or to a beneficial use location. While a cap-in-place is typically less costly than a closure by removal, state regulations are increasingly imposing requirements that favor closure by removal due to perceived environmental benefits, community impacts and sustainability goals.

Charah Solutions offers an alternative approach to collecting bottom ash without sluicing into an impoundment. Our PondX® system can intercept the bottom ash slurry and remove the bottom ash before recycling the water back to the plant for reuse for bottom ash transfer. This eliminates the disposal impoundment and reduces the water demands for the power plant.

Yes, Charah Solutions has experience and expertise in the design and construction of dry fly ash collection and storage systems. Because we operate mechanical systems of every major type at utility plants across the U.S., we have a qualified perspective and knowledge of what works well and which equipment solution works best with each type of coal combustion residuals (CCR) product. Each plant has unique circumstances, and Charah Solutions can help you choose the most economical system that accommodates a strong recycling program and an efficient disposal option.

Utility Ash Beneficiation and Byproduct Sales

Charah Solutions will provide a dedicated team that will work for you to promote the use of coal combustion products (CCPs) produced at your station. We will diligently search and find opportunities that exist in the market to utilize CCPs from your station. In addition, Charah Solutions can provide beneficiation technology solutions in situations where the coal combustion residuals (CCRs) need processing and quality improvement to meet market specifications. Our experience and expertise in processing and marketing CCPs will maximize the value of your byproduct revenues.

The Charah Solutions MultiSource® materials network consists of nearly 40 nationwide locations with international sourcing and distribution which provide access to ready mix concrete and cement markets in high-demand locations across the country. This network helps expand your sales for the beneficial use of materials and eliminate the need to store materials in a landfill or pond. We transport these materials through our network of barge, rail and truck logistic services, ensuring quick and reliable sales and supply in the regions that need it most. Our MultiSource network ensures a continuous and reliable supply of supplementary cementitious materials (SCMs), including quality Class C fly ash, Class F fly ash, MultiCem slag cement, MultiPozz pozzolan, bottom ash, gypsum and Integrated Gasification Combined Cycle (IGCC) slag, for ready mix concrete producers and other customers throughout the United States.

Bottom ash is commonly used in a wide variety of construction material applications. Charah Solutions has the expertise to evaluate ash sources and determine if they qualify for use in any application, and we have a successful track record of finding markets for the beneficial use of bottom ash.

Utility Landfill Management and Structural Fill Projects

Yes, Charah Solutions is experienced in managing large disposal sites and routinely handles millions of tons annually of coal combustion residuals (CCRs). We can also handle the design and installation needs for drainage, erosion control, synthetic liners and leachate collection systems, and perform permit record keeping for landfill sites. Compliance with the new CCR requirements can be assured with a Charah Solutions-designed operating plan that addresses each specific area of the landfill operation.

Yes, Charah Solutions has the experience and expertise to construct your new ash landfills, new wastewater management ponds and compliant ash pond projects. As part of an integrated coal combustion residuals (CCR) compliance strategy, Charah Solutions can supply expertise on cost effective ash management methods and new wastewater management facilities to meet the new regulations for CCR facilities. Regardless of the complexity of the design, we can provide the engineering experience, technical expertise and equipment needed to meet your ash management construction needs.

A structural fill is an engineered fill designed to improve land for an intended end use. Typically, the land is unusable for the intended end use unless fill material is imported to raise the elevation to fit the desired design. Due to its homogenous particle size, predictable geotechnical characteristics, low unit weight, relatively high shear strength and ease of handling and compaction, coal ash is an ideal material for such fills. Charah Solutions is highly experienced in the use of coal ash, placing it and compacting it in accordance with approved ASTM design criteria.

Charah Solutions completed a coal ash structural fill project at Asheville (North Carolina) Regional Airport. Click here to learn more about the construction process and components of a fully lined structural fill.

Utility Environmental Liability Transfer (ELT) Services

Charah Solutions offers one-stop services for your entire portfolio of Environmental Liability Transfer projects. Charah Solutions is able to provide innovative solutions to our customers that are now experiencing an increased need to retire and decommission older, un-utilized, or non-profitable generating assets while maximizing the value of the assets and eliminating environmental liabilities. This service enables our customers to potentially transfer an environmental liability from their balance sheet, while receiving maximum value of the assets along with contractual indemnification protection against regulatory changes, third party citizen suites, and environmental pollution. Charah Solutions has the financial resources to support the transaction, we have the skill to effectively manage the environmental risk as well as the team that can safely remediate your site, all while also substantially lowering your cost model. Charah Solutions reviews each site’s particular liabilities followed by a turnkey proposal that includes a remediation action plan and a re-purpose plan for the property. Our range of services for Environmental Liability Transfer and post-closure obligations include the following capabilities:

• Management of the entire project from site purchase to remediation and re-development.
• Remediation of the coal combustion residuals (CCR) ponds and landfills.
• Marketing of coal combustion products (CCPs).
• Demolition services to bring down the power plant structures and perform asbestos abatement.
• Relationships to assist in maximizing the scrap recovery of materials and equipment.
• Third party environmental services to perform due diligence prior to legal transfer of the property.
• Insurance relationships to assist with the assessment of risk, and utilize the best methods to maximize insurance protection.
• Design engineering for site remediation and third party CQA/CQC testing services.
• Assess site re-development potential and help manage the re-development process.

Utility Limestone Handling & Grinding

Charah Solutions manages plant needs for limestone at all levels of the value chain. Charah Solutions can assist in locating the most economical source of limestone to meet scrubber chemistry needs and can deliver a finished product in a form that meets the utility’s needs; from aggregate to ground limestone ready to inject into the scrubber.

Charah Solutions can design, build, own and/or operate the limestone grinding facility needed to deliver the specified quality of limestone that meets the client’s scrubber requirements. We currently operate grinding capacity to meet the customer scrubber specifications. Our experience in grinding facility design, construction and operation will deliver value to your power plant. Charah Solutions will also provide the capital investment to meet your grinding facility needs. Contact Charah Solutions early in your project planning process to take full advantage of our experience.


Utility Maintenance & Technical Services

Yes. Our power plant maintenance and modifications team serves nuclear, coal, gas, hydro, and solar power generation facilities providing fully integrated solutions for plant maintenance and construction. We bring value-added, customized services to utilities in key areas including staff augmentation, operations and maintenance, construction, capital improvements and plant retrofits. Our approach is to ensure that clients can remained focused on their core business while we optimize the effectiveness of their capital and maintenance budgets.

We typically averages 2 to 4 million craft hours on an annual basis for some of the largest electric and nuclear providers in North America. In today’s competitive environment, access to qualified personnel for construction, maintenance, outages/shutdowns, and technical applications is critical for success. We leverage resources through our regional offices and strong craft following to meet these challenging demands.

Our approach to managing a construction project places a strong emphasis on self-perform construction tailored to fit local labor availability and capabilities, as well as the construction sequence and schedule. This involves close coordination with the design team to make sure the design is closely aligned with the construction plan. Using this integrated approach led by experienced supervision, we have a proven track record executing projects on a fast-track basis while still maintaining effective safety, cost, quality, and schedule controls.

EnviroSource™ Fly Ash Beneficiation Technology (formerly MP618®)

Our proprietary EnviroSource fly ash beneficiation technology utilizes a thermal beneficiation process to achieve a higher quality material that meets ATSM and state specification requirements for use in the production of Portland cement and concrete. The proven technology reduces loss on ignition (LOI), ammonia, activated carbon, mercury and other contaminants making your formerly unusable fly ash in current production or legacy ash stored in ponds or landfills immediately marketable. As a result, the need for landfills, ponds and other disposal methods will be reduced.

EnviroSource eliminates previously uncombusted carbon and a wide range of contaminants in raw fly ash material. Importantly, not only does this technology create a sustainable use for coal combustion residuals (CCRs) and save valuable landfill storage space, it also reduces greenhouse gas emissions by serving as a supplementary cementitious materials (SCM) in place of Portland cement. It is estimated that for each ton of beneficiated fly ash there is one ton of potential CO2 emissions eliminated from the atmosphere.

Our EnviroSource fly ash beneficiation technology offers distinguishable benefits compared to alternative technologies in many ways as described below:

• Significantly lower cost profile
• Efficient footprint with self-contained environmental controls that can be deployed in weeks versus years.
• Modular design that can be scaled up or down to increase production based on market demand, allowing for the production of 40,000 to 200,000 tons per year
• Equipment can be used to meet demand without requiring high volumes for cost effectiveness or self-sustaining operation
• Can be installed at operating power plants, non-operating power plants or off-site
• Enables the processing of kiln dust to remove mercury for emissions regulations compliance.

Its most impressive distinction is its ability to deliver all of these benefits at a significantly lower cost profile than competing technologies, combined with an efficient footprint.

Concrete Producer

We offer high-quality Class C fly ash, high-quality Class F fly ash, MultiCem™ slag cement, MultiPozz™ pozzolan, bottom ash, gypsum and IGCC slag. These materials are distributed through our MultiSource® materials network of nearly 40 nationwide locations with international sourcing and distribution as well as a national network of barge, rail and truck services which ensures a continuous and reliable supply of supplementary cementitious materials (SCMs) for ready mix concrete producers and other customers throughout the United States.

Our MultiSource® materials network consists of nearly 40 nationwide locations with international sourcing and distribution as well as a national network of barge, rail and truck services which ensure a continuous and reliable supply of supplementary cementitious materials(SCMs), including quality Class C fly ash, Class F fly ash, MultiCem slag cement, MultiPozzpozzolan, bottom ash, gypsum and Integrated Gasification Combined Cycle (IGCC) slag, for ready mix concrete producers and other customers throughout the United States.

The main chemical components of fly ash are silica, alumina, iron and calcium oxides; all identical constituents of Portland cement. These common components contribute to added strength and durability of concrete.

Concrete manufactured with quality fly ash demonstrates the following technical advantages: added long term strength, durability, lower permeability, improved resistance to sulfate attack, increased pumpability and workability, and improved finish product quality. Additionally, concrete with fly ash is less expensive and more sustainable.

Our MultiPozz™ pozzolan, manufactured using our patented grinding technology, extends our complete portfolio of supplementary cementitious materials (SCMs), providing a continuous, reliable supply of pozzolan to concrete producers and other customers. It is produced by Charah Solutions’ proprietary grinding technology by converting natural pozzolans found in the earth, such as volcanic ash, into a highly desirable input for the production of Portland cement as it provides strength, durability, improved finish, and consistent performance in concrete. Because the supply of high-quality SCMs such as fly ash is limited in some regions of the country, the production of MultiPozz pozzolan, which meets ASTM and state specifications, is generating strong interest among concrete producers.

MultiPozz pozzolan is distributed through Charah Solutions’ unique MultiSource® materials network of nearly 40 nationwide sourcing locations which ensures a continuous and reliable supply of supplementary cementitious materials (SCMs), including quality Class C fly ash, Class F fly ash, pozzolan, bottom ash, gypsum and Integrated Gasification Combined Cycle (IGCC) slag, for ready mix concrete producers and other customers throughout the United States.

International Raw Materials Sales & Services

Whether it is industrial raw materials for production use or quality cement manufacturing materials, Charah Solutions has a broad materials lineup and the technical expertise to source exactly what is needed. We provide the materials, backed by strong sales and technical support, efficient inventory management, customized options and door-to-door logistics covering every point on the globe.

Our industrial raw materials lineup includes a broad range of materials from iron source to industrial slag to iron rich materials (IRM), mill scale, steel slag, iron ore, natural gypsum, synthetic gypsum and abrasives. We also provide cement manufacturing raw materials from alumina source to fly ash and bottom ash to bauxite, clay and alumina slag, granulated blast furnace slag (GBFS), fly ash, silica fume and pozzolan.

In addition, Charah Solutions offers high-quality Class C fly ash, high-quality Class F fly ash, MultiCem™ slag cement,  MultiPozz™ pozzolan, bottom ash, gypsum and IGCC slag byproducts for use in the concrete industries through our MultiSource® materials network distribution system of nearly 40 nationwide sourcing locations with international sourcing and distribution locations.