
Phase 1 Environmental Site Assessments (ESAs) are investigations conducted to evaluate the environmental condition of a property in Arizona. They are typically carried out before real estate transactions or development projects to identify potential environmental liabilities, such as soil or groundwater contamination, and ensure regulatory compliance. ESAs involve a visual property inspection, a search of historical records and regulatory files, and interviews with property owners and occupants. The scope of the assessment can vary depending on the specific requirements of the client and may include reconnaissance-level characterization (Phase I) or more comprehensive detailed studies (Phase II & III). These assessments provide valuable information for buyers, lenders, and developers, helping them make informed decisions about environmental risks and potential liabilities.
| Characteristics | Values |
|---|---|
| Purpose | To evaluate the environmental condition of a property, usually before real estate transactions or development projects |
| Objective | To identify potential environmental liabilities, such as soil or groundwater contamination, hazardous materials, or other environmental risks associated with the historical use of the property |
| Scope | Reconnaissance-level characterization, visual property inspection, search of historical records and regulatory files, interviews, drilling/sampling, testing, monitoring, and design |
| Outcome | A comprehensive report providing valuable information for buyers, lenders, and developers, aiding them in making informed decisions about environmental risks and potential liabilities |
| Benefits | Safety, financial, and legal protection from contamination; assurance that borrowers will not incur expensive remediation costs; regulatory compliance and risk management |
| Standards | Conducted according to the American Society for Testing and Materials (ASTM) E 1527, Standard Practice for Environmental Site Assessments |
| Providers | GPI, Solid Ground Environmental, ACS Services LLC |
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What You'll Learn

Environmental Site Assessments (ESAs)
The Phase I ESA involves a visual property inspection, a search of historical records and regulatory files, and interviews with property owners and occupants. Skilled environmental professionals conduct these assessments to create a comprehensive report, providing valuable information for buyers, lenders, and developers. This report aids in making informed decisions about environmental risks and potential liabilities. It is also used to address environmental concerns early in the due diligence process, ensuring regulatory compliance and effective risk management.
A Phase I ESA can protect individuals, banks, or other entities from liability due to unexpected environmental contamination found on the property. When financing a loan, it provides assurances that the borrower will not incur expensive remediation costs, reducing the risk of default. Additionally, it can satisfy the requirements of CERCLA's (Comprehensive Environmental Response, Compensation, and Liability Act) innocent landowner defense under All Appropriate Inquiries (AAI).
The scope of a Phase I ESA can vary depending on the specific needs of the client. It typically includes a site visit, a review of records, maps, figures, site photographs, and property-specific information. If the findings of the Phase I ESA warrant further investigation, a Phase II ESA will be recommended, which involves actual sampling and testing.
Companies such as GPI and Solid Ground Environmental provide Phase I and Phase II ESAs in Arizona, ensuring that individuals and organizations can make informed decisions about their properties while complying with local, state, and federal environmental laws.
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Recognised Environmental Conditions (RECs)
Recognized Environmental Conditions (RECs) are one of the terms used to identify environmental liability within the context of a Phase I Environmental Site Assessment (ESA). According to the American Society for Testing and Materials (ASTM), a REC is defined as "the presence or likely presence of any hazardous substances or petroleum products in, on, or at a property".
In other words, a REC is any possible source of contamination. This includes the presence of hazardous substances or petroleum products due to a release to the environment, or the likely presence of such substances due to a release or likely release to the environment. It also includes the presence of hazardous substances or petroleum products under conditions that pose a material threat of a future release to the environment. For example, indications of an oil spill or chemical spill at a property.
The Phase I ESA involves a visual property inspection, a search of historical records and regulatory files, and interviews. It is conducted to identify potential environmental liabilities, such as soil or groundwater contamination, hazardous materials, or other environmental risks associated with the historical use of the property. This service is essential for regulatory compliance and risk management, ensuring that stakeholders are aware of and can address environmental concerns early in the due diligence process.
If RECs are identified during the Phase I ESA, it may indicate the need for further action, such as sampling and testing. It is important to note that the presence of RECs is not necessarily a deal-breaker for a property transaction. The severity of the release, status of the release, controls in place, desired use of the property, and other factors will also play a role in determining the next steps.
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Site investigations
During a Phase 1 ESA site investigation, specific locations are frequently scrutinized, including the property itself and any neighbouring areas that could impact the site. This includes assessing the property's past and present usage, such as industrial, commercial, or residential activities. Investigators also look for known or potential contamination sources, including underground storage tanks, hazardous waste disposal, and spills.
Wetlands and other protected natural resources on or near the property are also considered. Any environmental studies or cleanups undertaken on the site or nearby properties are reviewed, along with relevant regulatory information or enforcement actions. The presence of any historical or cultural resources on or around the site is another important aspect of the investigation.
To create a comprehensive report, skilled environmental professionals conduct thorough reviews of available records, site history, and interviews with property owners and occupants. The investigation process may also involve a visual property inspection, a search of historical records and regulatory files, and interviews with relevant individuals. The final report outlines the findings of the environmental study, including any suggestions for further inquiry or testing and potential liabilities or risks associated with the property.
Companies such as GPI, Solid Ground Environmental, and RSB Environmental provide Phase 1 ESA services in Arizona. These companies have experienced staff and environmental professionals who conduct thorough site investigations and prepare reports according to ASTM standards and other relevant guidelines.
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Regulatory compliance
Phase 1 Environmental Site Assessments (ESAs) are critical investigations conducted in Arizona to evaluate the environmental condition of a property. These assessments are typically carried out before real estate transactions or development projects to identify potential environmental liabilities and ensure regulatory compliance.
The assessments involve a thorough review of available records, site history, and interviews with property owners and occupants. Skilled environmental professionals prepare these reports according to the American Society for Testing and Materials (ASTM) standards or other lender requirements. The ASTM defines "Recognized Environmental Conditions" (RECs) as the presence or likely presence of hazardous substances or petroleum products that pose a material threat to the environment.
Phase 1 ESAs help protect buyers, lenders, and developers from unexpected environmental contamination and the associated financial and legal consequences. By identifying potential environmental issues, stakeholders can make informed decisions and address any necessary remediation early in the project lifecycle.
Additionally, Phase 1 ESAs can satisfy the requirements of CERCLA's (Comprehensive Environmental Response, Compensation, and Liability Act) innocent landowner defense under All Appropriate Inquiries (AAI). This provides further assurance that stakeholders are complying with regulatory requirements and mitigating potential environmental risks effectively.
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Risk management
Phase 1 ESAs involve a comprehensive investigation into the environmental conditions of a property. Skilled environmental professionals conduct site visits, review historical records, and interview property owners and occupants. This thorough process helps identify any Recognized Environmental Conditions (RECs) as defined by the American Society for Testing and Materials (ASTM). RECs refer to the presence or likely presence of hazardous substances, petroleum products, or other contaminants that may pose a threat to the environment.
The assessment process is tailored to the specific needs of the client and the site being evaluated. Factors such as previous and current land use, as well as the scope of the project, are considered to determine the extent of the study. For example, a preliminary site assessment (Phase I) may be conducted first, and if warranted, a more detailed investigation (Phase II) involving sampling, testing, and subsurface exploration may be recommended.
By identifying potential environmental liabilities early on, stakeholders can make informed decisions to mitigate risks. For instance, if contamination is discovered, remediation strategies can be implemented to address the issue. Additionally, in the context of real estate transactions, a Phase 1 ESA can protect buyers from liability for unexpected environmental contamination discovered after the purchase. It also provides lenders with assurance that borrowers will not incur unexpected environmental remediation costs, reducing the risk of loan default.
Furthermore, Phase 1 ESAs help ensure regulatory compliance. Environmental professionals are well-versed in local, state, and federal environmental laws and can guide stakeholders through the complex regulatory landscape. This aspect of risk management is crucial, as non-compliance can result in significant legal and financial consequences.
In summary, risk management is at the core of Phase 1 Environmental Site Assessments in Arizona. By conducting thorough investigations, identifying potential environmental risks, and providing valuable information to stakeholders, these assessments enable proactive decision-making and help safeguard the environment, while also protecting the financial and legal interests of those involved.
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Frequently asked questions
A Phase 1 Environmental Site Assessment (ESA) is a critical investigation conducted to evaluate the environmental condition of a property. This assessment is typically done before real estate transactions or development projects to identify potential environmental liabilities, such as soil or groundwater contamination, and ensure regulatory compliance.
A Phase 1 ESA is necessary to provide safety, financial, and legal protection to all stakeholders involved in a property transaction or development project. It ensures that potential environmental issues and liabilities are identified early on, enabling buyers, lenders, and developers to make informed decisions.
A Phase 1 ESA involves a visual property inspection, a review of historical records and regulatory files, and interviews with property owners and occupants. The assessment is conducted according to the American Society for Testing and Materials (ASTM) standards or lender requirements.
A Phase 1 ESA is typically conducted before the closure of a real estate transaction or at the beginning of a development project. This timing ensures that potential environmental issues are identified early, reducing future risks and costs associated with remediation.

























