Phase 1 ESA

Phase 1 ESA

The Phase 1 Environmental Site Assessment (ESA) is an important first step in understanding the environmental history of a site and may be necessary as a condition of property sale/purchase, to secure bank financing, or to obtain a record of site condition (RSC) to allow for changes in site use.

The Phase 1 investigation consists of the following:

  • A review of available historical information on the site and surrounding area, and other resources (e.g., online aerial photography) obtainable within the project delivery date.
  • The completion and analysis of a Site Owner’s Survey.
  • A Site Walkover supervised by a Qualified Person (QP), including a walk-through of any structures present on the property.

Based on the information provided through the Phase 1 investigation, there may be no need for further investigation of the site. If the Phase 1 ESA identified any area(s) of potential environmental concern (APEC) on the subject site, a recommendation may be made to investigate these area(s) through a Phase 2 ESA.

Area(s) of Potential Environmental Concern (APEC) consist of any area on, in or under the site and surrounding area where one or more contaminants of potential concern may be present, as identified through an initial Phase 1 investigation. There are some key indicators that an APEC exists on a site:

  • Current/past site use consisted of potentially contaminating activities (PCAs). There are fifty-nine (59) potentially contaminating activities listed under O. Reg. 153/04, the guiding legislation for ESAs in Ontario.
  • Visual and/or olfactory evidence of a potentially contaminated area during the site walkover. Visual evidence typically consists of surficial stains present on the floor/ground of the site.
  • Analysis of available environmental reports, chain of title documentation, fire insurance plans and historical aerial photographs provides information leading to an APEC on-site.
  • The current and historical information available on the area(s) surrounding the subject site (particularly areas up-gradient of the site) leads to an APEC along the site boundaries.
A Phase 1 ESA ranges in cost and timelines based on the size and location of the property, and the reason for undertaking environmental due diligence on the site. For example, environmental due diligence to allow for land conversion of a site requires a more comprehensive report than a Phase One ESA to allow for financing/refinancing.

With hundreds of successfully completed Phase 1 ESAs, including many since the 2011 O. Reg. 153/04 amendments, AEL is a proven leader in environmental site assessments.

For information on pricing, check out our blog post, How Much Does an ESA Cost?or Get a Quote now.

Our Process

Why AEL Environment?

Save Time & Money

We ensure that our robust reporting and recommendations not only meet your needs, but help you make decisions efficiently and effectively.

Get Educated

With AEL environment not only do you receive detailed assessments and reports but we make sure you understand them as well. Learn more.

Excellent Client Services

Our dedicated team will answer any of your questions, big or small. We are committed to providing customized solutions. Contact us.

Expert Engineers

With over 30 years of experience our expert engineers will be able to address any concern or issue on your property. Meet the team.

We help you manage the unknown

Every property has a history, we can help you interpret it using our detailed reports.

AEL environment is focused on creating tailored solutions based on your end goals for each property. Tell us the service you need, and our team of expert engineers will inform you.

Together, we can ensure you understand your reports to make informed decisions.

What Our Clients Are Saying
AEL environment
"In my two decades plus as a specialist in Environmental Law, I have dealt with numerous environmental consulting firms right across Canada, and from big to small, Not all of them are able to deal with sophisticated scientific questions and not all of the ones with greater scientific skills are practical."
Michael Peterson, Environmental Law
Sky Counsel Group

We help you manage the unknown

Every property has a history, we can help you interpret it using our detailed reports.

AEL environment is focused on creating tailored solutions based on your end goals for each property. Tell us the service you need, and our team of expert engineers will inform you.

Together, we can ensure you understand your reports to make informed decisions.

What Our Clients Are Saying
AEL environment
"In my two decades plus as a specialist in Environmental Law, I have dealt with numerous environmental consulting firms right across Canada, and from big to small, Not all of them are able to deal with sophisticated scientific questions and not all of the ones with greater scientific skills are practical."
Michael Peterson, Environmental Law
Sky Counsel Group
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