Phase III Environmental Site Assessment / Remediation

Protect your commercial property investment with practical contamination cleanup, clear recommendations and documented results.

Nexus Environmental Services Ltd. provides Phase III Environmental Site Assessment and remediation services—also commonly called Phase 3 ESAs—for commercial, industrial, agricultural and multi-residential properties throughout Alberta.

Whether a Phase II ESA has identified contamination, your lender requires environmental concerns to be addressed or you are preparing a property for redevelopment, we help you understand the options and move forward with a practical remediation plan.

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✓ Site-specific remediation planning and contractor coordination
✓ Confirmatory sampling and clear remediation reporting
✓ Phase III ESA and remediation services available throughout Alberta

Environmental Remediation for Confident Property Decisions

Addressing Contamination

Develop and implement a practical plan to address soil or groundwater contamination identified through environmental investigation.

Supporting Property Transactions

Provide documented remediation results to help buyers, owners and lenders evaluate outstanding environmental concerns.

Preparing for Redevelopment

Address contaminated areas that could affect excavation, construction or the proposed use of a property.

What Is a Phase III Environmental Site Assessment?

A Phase III Environmental Site Assessment commonly refers to the remediation stage of an environmental project. It follows investigations that have identified contamination and involves planning, implementing and documenting work to address the affected areas.

Unlike a Phase I ESA, which identifies potential environmental concerns, or a Phase II ESA, which investigates soil and groundwater conditions, Phase III work focuses on addressing confirmed contamination.

Depending on the property, this may involve excavating and disposing of contaminated soil, treating contamination in place, managing affected groundwater or implementing an appropriate risk-management approach.

The term “Phase III ESA” is commonly used in commercial real estate, although the specific services are more accurately described as remediation planning, implementation and reporting.

Nexus develops each remediation program around the property’s environmental conditions, applicable Alberta requirements, intended land use and project objectives.

Phase III Work May Include:

✓ Review of previous environmental investigations
✓ Additional delineation where required
✓ Evaluation of remediation options
✓ A site-specific remediation plan
✓ Contractor coordination and environmental oversight
✓ Contaminated soil excavation and disposal
✓ Soil or groundwater treatment, where appropriate
✓ Confirmatory sampling and laboratory analysis
✓ Backfilling and site restoration coordination
✓ Remediation reporting and recommendations

Important: Remediation is specific to the property. The work required depends on the nature and extent of contamination, site access, buildings, underground infrastructure and the applicable environmental criteria.

What Does a Phase III ESA Include?

Review of Environmental Conditions

We review previous environmental reports, laboratory results and site information to understand the identified contamination and determine whether sufficient information is available to plan remediation.

Remediation Planning

We evaluate suitable approaches based on the contaminants, affected soil or groundwater, site constraints and project objectives. The proposed scope explains the work to be completed, anticipated limitations and how the results will be evaluated.

Contractor Coordination

We coordinate with excavation, drilling, transportation, disposal and other contractors as required. Environmental oversight helps guide the work as subsurface conditions are exposed.

Remediation Implementation

The selected remediation approach is carried out under environmental oversight. This may include excavating contaminated soil, arranging approved disposal, implementing treatment or addressing affected groundwater.

Confirmatory Sampling

Samples are collected from appropriate locations to evaluate conditions following remediation. For an excavation, this commonly includes sampling the exposed walls and floor before backfilling.

Laboratory results help determine whether the remediation objectives have been achieved at the sampled locations or whether further work is warranted.

Reporting and Recommendations

The completed report documents the remediation activities, sampling locations, analytical results, disposal records and remaining limitations. It explains the outcome and identifies any further investigation, monitoring or management requirements.

When Do You Need a Phase III ESA?

Phase III assessment and remediation services may be needed when:

A Phase II ESA identifies contamination requiring action
Contaminated soil must be removed before redevelopment
A property transaction requires identified environmental concerns to be addressed
A lender requests remediation and supporting documentation
A fuel tank leak or historical spill has affected soil or groundwater
Contamination is encountered during excavation or construction
Previous cleanup work requires further assessment or completion
A property owner wants to reduce outstanding environmental liabilities
Regulatory requirements call for remediation or risk management
Ongoing monitoring indicates that additional action is warranted

Planning the work early can help owners understand potential costs, scheduling requirements and constraints before committing to a transaction or construction schedule.

Working Toward a Purchase, Financing or Construction Deadline?

Send us the property address, available environmental reports and your required completion date. We will review the information and outline the next steps needed to develop an appropriate remediation scope.

Remediation schedules depend on the extent of contamination, contractor availability, disposal arrangements, laboratory turnaround and conditions encountered during the work.

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Environmental Concerns Phase III Work Can Address

Historical activities can leave contamination beneath buildings, parking areas and landscaped portions of a property. Addressing these conditions requires an approach suited to both the contamination and the site.

Phase III work may address impacts associated with:

Leaking underground and aboveground fuel storage tanks
Former gas stations and bulk fuel facilities
Petroleum spills and historical fuel handling
Automotive repair and equipment-maintenance areas
Waste oil storage and disposal
Industrial chemical handling
Solvent releases
Pesticide and fertilizer storage
Contaminated fill and historical waste disposal
Affected groundwater associated with on-site releases

Where contamination originates from a neighbouring property, further investigation and coordination may be needed to understand the source and develop an effective response.

The appropriate remediation method depends on the substances present, their concentrations, the affected area and the potential exposure pathways.

Does Every Contaminated Property Require Excavation?

No. Excavation and off-site disposal are common approaches for contaminated soil, but they are not suitable or necessary for every site.

Depending on the conditions, other options may include treatment in place, groundwater treatment, monitoring or a supported risk-management approach.

Buildings, utilities, property boundaries and the depth of contamination can affect which methods are practical. Some projects require a combination of approaches or work completed in stages.

Nexus explains the available options, their limitations and the information needed to select an appropriate path forward.

Why Choose Nexus Environmental?

Nexus Environmental Services Ltd. is an Alberta-based environmental consulting company providing environmental investigation, remediation and contaminated-site support for commercial and industrial properties.

Practical Remediation Experience

Our work combines environmental investigation with field oversight, confirmatory sampling and contractor coordination to address contamination under real site conditions.

Site-Specific Planning

Remediation recommendations consider the property’s actual conditions, intended use and physical constraints. We explain the purpose of the proposed work and the factors that could affect its scope.

Clear Communication

You communicate directly with the environmental professional managing your project. We explain the findings, progress and decisions so you understand what is happening on your property.

Coordinated Fieldwork

We work with contractors, laboratories and disposal facilities to coordinate the environmental components of the remediation program.

Documented Results

Our reporting records the work completed, laboratory findings and any remaining environmental concerns, helping property owners and intended report users understand the outcome.

Complete Environmental Support

Nexus also provides Phase I and Phase II Environmental Site Assessments, contamination delineation, groundwater monitoring, vapour intrusion assessments and other environmental consulting services.

Phase III ESA and Remediation Services Across Alberta

Nexus Environmental Services Ltd. provides Phase III assessment and remediation services throughout Alberta.

Based in Lethbridge, we serve clients in Calgary, Edmonton, Red Deer, Medicine Hat, Brooks, Taber, Fort Macleod, Claresholm, Pincher Creek, Crowsnest Pass and communities across the province.

We assist commercial property owners, buyers, sellers, investors, developers, lenders and real estate professionals with environmental remediation in urban and rural Alberta.

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Frequently Asked Questions

What Is the Difference Between a Phase II and Phase III ESA?

A Phase II ESA investigates actual or potential contamination through physical sampling and laboratory testing.

Phase III work commonly refers to planning, implementing and documenting remediation to address contamination identified during those investigations.

Additional Phase II investigation may be required before or during remediation to define the affected area.

Does Contamination Automatically Mean a Property Needs Cleanup?

Not every detected substance requires remediation. Results must be evaluated against applicable environmental criteria and the site’s conditions.

Where concentrations exceed applicable criteria, further assessment is needed to determine the appropriate response. This may include additional investigation, remediation or a supported risk-management approach.

How Long Does Environmental Remediation Take?

The schedule depends on the extent and depth of contamination, site access, contractor availability, disposal requirements and laboratory turnaround.

Some soil excavation projects can be completed relatively quickly, while groundwater treatment or contamination beneath buildings may require a longer program.

We discuss anticipated scheduling and known uncertainties when developing the scope.

How Much Does a Phase III ESA Cost?

Costs depend on the remediation method, the volume and type of affected material, excavation depth, disposal requirements, site constraints, sampling needs and restoration work.

Existing environmental reports are usually needed to develop a meaningful estimate. If the contamination has not been sufficiently delineated, additional investigation may be recommended first.

Can You Provide a Fixed Remediation Cost?

A defined scope may be priced where sufficient investigation information is available. However, underground conditions and the full volume of affected material cannot always be confirmed before work begins.

Nexus identifies known uncertainties and explains how changes in field conditions could affect the proposed scope and cost.

Can Contaminated Soil Be Taken to Any Landfill?

No. Disposal arrangements must account for the soil’s characteristics and the receiving facility’s acceptance requirements.

Laboratory results and other documentation may be required before acceptance. Nexus can coordinate soil characterization and disposal arrangements as part of the remediation scope.

What Happens If Contamination Extends Beneath a Building?

Further investigation may be needed to understand the extent and potential exposure pathways. Options depend on access, structural constraints and the contaminants involved.

The response may include targeted removal, treatment, vapour assessment, monitoring or risk management where appropriate.

Does a Remediation Report Provide Regulatory Closure?

A remediation report documents the work completed and the environmental conditions assessed. It does not, by itself, constitute a government-issued remediation certificate or regulatory closure.

Any formal closure objective should be discussed at the planning stage so the scope can address the applicable requirements.

Can Nexus Take Over a Project Started by Another Consultant?

Yes. Nexus can review previous investigation and remediation reports to assess the available information and identify the next steps.

Additional investigation or documentation may be required before a remediation scope can be finalized.

Do You Provide Remediation Services Outside Southern Alberta?

Yes. Nexus provides Phase III assessment and remediation services throughout Alberta, including Calgary, Edmonton, Red Deer, Medicine Hat and rural communities across the province.

What Information Is Needed for a Quote?

Provide the property address, available environmental reports, the reason for the work, your required completion date and the name of the lender or intended report user, if applicable.

Information about site access, current operations, buildings, underground infrastructure and planned redevelopment is also helpful.

Protect Your Property Investment

Whether you are addressing historical contamination, preparing for redevelopment or resolving environmental concerns during a property transaction, Nexus Environmental Services Ltd. can help you develop a practical path forward.

Send us the property address, available environmental reports and your required completion date to discuss your Phase III assessment and remediation needs.