What Happens When Contamination Is Found on a Miami Property?

Contamination does not automatically stop a Miami property transaction or development project. When soil, groundwater, or other environmental contamination is identified, the next steps may include additional site assessment, regulatory review, remediation, monitoring, and environmental closure depending on the site conditions and applicable requirements.

Contamination Was Found. What Happens Next?

When contamination is found on a Miami property, the next step is to determine what was detected, where it is located, whether additional assessment is needed, and which regulatory requirements apply. Depending on the nature and extent of the contamination, the property may then require remediation, monitoring, risk-based corrective action, or another pathway toward regulatory closure.

Finding contamination is the beginning of an environmental evaluation. It does not automatically mean the property requires active remediation. Environmental professionals evaluate the contaminants detected, concentrations, affected environmental media, potential sources, extent of impacts, site conditions, and applicable regulatory requirements to determine the appropriate next steps.

For a contaminated property in Miami-Dade County, the process may progress through:

CONTAMINATION DISCOVERY → SITE ASSESSMENT → REGULATORY EVALUATION → CORRECTIVE ACTION / REMEDIATION → MONITORING → REGULATORY CLOSURE

The specific path depends on the environmental conditions and regulatory program applicable to the site. The following sections explain how a contaminated property is typically evaluated, what determines the appropriate regulatory and corrective-action pathway, and how the process can progress toward environmental closure.

1. Confirm the Type and Extent of Contamination

Contamination may be discovered during a Phase II Environmental Site Assessment, regulatory investigation, storage tank investigation, redevelopment project, facility monitoring, spill response, or other environmental sampling.

Laboratory results should be evaluated in the context of the property and applicable criteria. Environmental professionals consider:

  • contaminants detected and their concentrations;

  • whether soil, groundwater, soil vapor, or other environmental media are affected;

  • known or suspected source areas;

  • historical and current property uses;

  • the location and depth of detected impacts; and

  • surrounding site conditions that may influence contaminant migration.

Initial sampling may confirm the presence of soil contamination or groundwater contamination without defining its complete horizontal or vertical extent. Additional site assessment may therefore be necessary before the environmental condition and appropriate response can be fully evaluated.

2. Determine Whether Additional Site Assessment Is Required

Once contamination has been confirmed, the next question is often whether enough information exists to understand the nature and extent of the impacts.

Additional environmental site assessment may include soil sampling, groundwater sampling, installation and sampling of monitoring wells, soil-vapor investigation, source-area evaluation, or investigation of other relevant environmental media.

The scope should be based on the contaminants detected, potential source areas, existing analytical results, property history, geology, hydrogeology, potential migration pathways, and requirements of the applicable regulatory program.

Phase II ESA vs. Regulatory Site Assessment in Florida

If contamination was initially identified during a Phase II Environmental Site Assessment, the Phase II findings may become the starting point for further investigation rather than the end of the assessment process.

A Phase II ESA typically uses targeted sampling to investigate known or suspected environmental concerns, often in connection with environmental due diligence. A regulatory site assessment, however, is performed to satisfy the assessment requirements of an applicable regulatory cleanup program.

In Florida, the Department of Environmental Protection (FDEP) specifically distinguishes a Phase II ESA from a Site Assessment Report required under Chapter 62-780, F.A.C. A Phase II ESA does not, by itself, satisfy the requirements of a Chapter 62-780 Site Assessment Report.

If a contaminated site becomes subject to that cleanup process, additional investigation, delineation, documentation, and reporting may be required, even when Phase II sampling has already been completed.

3. Evaluate Groundwater and Potential Contaminant Migration

Understanding whether contamination is moving beyond its original source area can be critical to determining what happens next.

When groundwater is affected, environmental professionals may evaluate groundwater flow direction, contaminant concentrations, source areas, plume distribution, migration pathways, and the potential for impacts to extend beyond the property boundary.

Depending on the complexity of the contaminated site, this may involve monitoring wells, groundwater sampling, aquifer testing, hydrogeologic analysis, or groundwater modeling.

South Florida's hydrogeologic conditions can make groundwater an important component of environmental investigations. Understanding groundwater conditions may influence the scope of assessment, remediation strategy, construction or dewatering considerations, and eventual path toward closure.

What If Contamination Extends Beyond the Property Boundary?

Off-site contamination can introduce additional assessment, notification, regulatory coordination, and risk-management considerations.

When data indicate or suggest that contamination has migrated beyond the property boundary, the environmental consultant should evaluate the applicable regulatory program and determine what additional investigation, documentation, or notification requirements may apply.

The required response depends on the contaminant, affected media, extent of migration, and regulatory framework governing the contaminated site.

4. Determine Which Environmental Regulations Apply

Once contamination has been identified, it is important to determine which regulatory program applies to the site. Regulatory requirements can affect notification, site assessment, reporting, cleanup criteria, corrective action, monitoring, and closure.

A contaminated property in Miami-Dade County may be subject to local, state, or federal environmental requirements, depending on factors such as the contaminant, source of the release, property history, and applicable cleanup program.

Relevant requirements may include Miami-Dade County Chapter 24, Florida's Chapter 62-780, F.A.C., Contaminated Site Cleanup Criteria, and the Contaminant Cleanup Target Levels established in Chapter 62-777, F.A.C., as well as other state or federal requirements depending on the site.

Not every contaminated property follows the same regulatory process. Identifying the applicable program early helps establish what assessment, documentation, corrective action, and closure requirements apply.

Miami-Dade Risk-Based Corrective Action

Miami-Dade County Chapter 24 establishes a Risk-Based Corrective Action (RBCA) process for contaminated properties within its jurisdiction that are required to conduct pollution remediation and are not eligible for specified State of Florida cleanup provisions identified by the County.

The County's RBCA framework addresses discovery and notification, assessment, natural attenuation, risk assessment, remediation, and No Further Action with Conditions, among other site-rehabilitation requirements. The specific requirements and available pathways depend on the regulatory status and environmental conditions of the property.

5. Determine the Appropriate Corrective Action

The presence of contamination does not automatically mean that active remediation is required.

The appropriate response depends on the contaminants present, concentrations, affected environmental media, nature and extent of impacts, potential exposure pathways, site conditions, applicable cleanup criteria, and regulatory program.

Depending on the applicable program and site-specific conditions, the path forward may include active remediation, Natural Attenuation with Monitoring, risk assessment, risk-based closure strategies, institutional or engineering controls, or other corrective-action approaches allowed by the governing regulatory framework.

Environmental Remediation

When active remediation is required, the remedial approach is developed around the contaminants and environmental conditions at the site.

Remediation may address contaminated soil, groundwater, sediment, surface water, source material, or other affected media, as applicable. Potential approaches can include source removal, treatment, containment, or other remedial technologies selected based on site-specific conditions and regulatory requirements.

Risk-Based Corrective Action

Risk-based corrective-action approaches consider site-specific conditions, contaminant concentrations, exposure pathways, and potential risks to human health and the environment when evaluating appropriate assessment, remediation, risk-management, and closure strategies.

Depending on the applicable regulatory program and site conditions, risk-based closure may involve alternative cleanup target levels and institutional or engineering controls where allowed and appropriately approved.

6. Remediate and Monitor the Contaminated Property When Required

When active remediation is required, the remedial strategy is developed based on the contaminants, affected environmental media, source and extent of impacts, hydrogeologic conditions, exposure pathways, applicable cleanup criteria, regulatory requirements, and site-specific conditions.

Under Chapter 62-780, F.A.C., a Remedial Action Plan (RAP) is required when active remediation is required. The RAP establishes the proposed remedial approach and addresses the contaminated environmental media subject to remediation.

Performance monitoring may be required during active remediation to evaluate the effectiveness of the remedial action. Following completion of active remediation, Post Active Remediation Monitoring (PARM) may also be required, particularly where groundwater contamination is involved, unless the applicable conditions for an exception or another approved pathway are satisfied.

The objective is to satisfy the requirements of the applicable regulatory program and progress toward an appropriate site-closure endpoint.

7. Work Toward Regulatory Closure

Once the applicable assessment, remediation, monitoring, or other site-rehabilitation requirements have been satisfied, a contaminated site may become eligible for No Further Action (NFA) or another applicable regulatory closure determination.

Under Chapter 62-780, F.A.C., the available closure pathway depends on factors including contaminant concentrations, affected environmental media, applicable cleanup target levels, site-specific risk considerations, and whether institutional or engineering controls are necessary.

No Further Action Without Controls

Under Chapter 62-780, No Further Action without Controls is available when the applicable criteria of Rule 62-780.680(1), F.A.C., are satisfied.

Among other requirements, FDEP describes this pathway as requiring contaminant concentrations in applicable environmental media to meet the specified cleanup criteria and the absence of free product. When the closure requirements are satisfied, the Department may issue a Site Rehabilitation Completion Order (SRCO).

No Further Action With Controls

Chapter 62-780 also provides pathways for No Further Action with Controls when the applicable requirements are satisfied.

These pathways can allow contamination to remain under approved risk-management conditions and may involve institutional controls and, when necessary, engineering controls to manage exposure and protect human health and the environment. The specific controls and closure requirements depend on the site conditions and applicable risk-management option.

Can You Buy or Develop a Contaminated Property in Miami?

Yes, in some circumstances. The presence of contamination does not automatically prevent a property from being purchased or redeveloped. However, contamination can create regulatory, technical, financial, and legal considerations that should be evaluated before proceeding.

Buyers and developers should understand the nature and extent of contamination, regulatory status of the site, applicable site-rehabilitation requirements, potential remediation or monitoring obligations, project schedule, and anticipated closure strategy.

Environmental conditions can also create important liability considerations. Environmental consultants evaluate the technical environmental condition of the property; qualified environmental counsel should advise buyers and other parties regarding legal liability, contractual risk allocation, and potential statutory liability protections.

One Environmental Team From Investigation to Closure

PHASE II INVESTIGATION → SITE ASSESSMENT → REGULATORY COORDINATION → CORRECTIVE ACTION / REMEDIATION → MONITORING → CLOSURE SUPPORT

CRB can remain involved as a contaminated-property project progresses from initial investigation through site assessment, remediation, monitoring, regulatory coordination, and closure support, as applicable.

Maintaining continuity helps preserve the property's technical history, reduce unnecessary handoffs, and give the project team access to environmental professionals who understand the previous findings, regulatory history, and objectives for the property.

Frequently Asked Questions About Contaminated Properties in Miami

  • The next step is to determine what contaminants were detected, where they are located, the concentrations present, and whether the nature and extent of the contamination have been adequately defined. From there, an environmental professional can evaluate whether additional site assessment, regulatory coordination, corrective action, remediation, or monitoring may be required under the applicable regulatory program.

  • Not necessarily. The appropriate response depends on the contaminant, concentrations, affected environmental media, extent of impacts, exposure pathways, applicable cleanup criteria, and regulatory program. Depending on the site, the appropriate pathway may involve active remediation, Natural Attenuation with Monitoring, risk-based corrective action, institutional or engineering controls, or another regulatory option.

  • Not automatically. A Phase II Environmental Site Assessment uses sampling and laboratory analysis to investigate specific environmental concerns. The results must be evaluated to determine whether contaminants are present, whether concentrations are significant under the applicable criteria, and whether additional investigation or regulatory action is warranted.

  • No. A Phase II Environmental Site Assessment is not the same as a regulatory Site Assessment Report under Chapter 62-780, F.A.C. If a contaminated site becomes subject to that cleanup process, additional assessment, delineation, documentation, and reporting may be required even if Phase II sampling has already been completed.

  • The regulatory authority depends on the source of contamination, type of release, and applicable environmental program. A contaminated property may involve Miami-Dade County environmental programs, the Florida Department of Environmental Protection (FDEP), the U.S. Environmental Protection Agency (EPA), or other authorities depending on the circumstances.

  • There is no single timeline for a contaminated site. The schedule depends on factors such as the nature and extent of contamination, affected environmental media, additional assessment requirements, regulatory review, selected corrective action, remediation performance, monitoring requirements, and closure criteria. Some environmental conditions can be addressed relatively quickly, while complex soil or groundwater contamination may require a longer regulatory process.