Air Quality Testing & Environmental Services

Ontario:  (416) 858-2866
Alberta: (780) 790-7101


Environmental Site Assessments (ESA)

AQC does not offer ESA services, however we are happy to refer you to a licensed engineer who can execute for you.

Environmental Site Assessments and Due Diligence Services:

  • Phase I ESA – (Risk Assessment of Potential Environmental Liability)
  • Phase II ESA – (Verification and Identification of Sources of Potential Contamination)
  • Phase III ESA – (Remediation of Environmental Liability)
  • Soil and groundwater testing (Click Here)

Phase I Environmental Site Assessment (ESA)
(Risk Assessment of Potential Environmental Liability)

The Phase I Environmental Site Assessment (ESA) is an examination of operations and activities from both present and past, which establishes the environmental condition of the site. The Phase I ESA is executed in the case of property sale, property transfer, or in order to determine existing or potential contamination of the site.

The Phase I ESA procedures implemented by AQC has incorporated CSA Standard Z768-01 (November 2001). Other specific necessities or REQUIREMENTS can be incorporated into the Phase I ESA upon request.

Phase I ESAs include both advisory guidance and additional tests and investigations that may be required. Having multiple locations and nation-wide staff allows AQC to provide accurate, reliable and timely assessments.

Phase II Environmental Site Assessment (ESA)
(Verification and Identification of Sources of Potential Contamination)

The Phase II Environmental Site Assessment (ESA) is characterized by a collection of physical samples to establish a more thorough assessment of the environmental condition of the site. The Phase I ESA report determines which tests need to be executed in Phase II.

AQC’s Phase II ESA procedures incorporate CSA Standard Z769-00. Samples are collected from the surface and sub-surface soil, surface and groundwater, and other substances from the site and subsequently analyzed for contaminants. Accuracy of the analytical data is ensured by AQC’s strict quality control and quality assurance policies. The data is then analyzed and evaluated relative to related environmental legislation regulations, as well as client requirements. Remediation options and cost estimates are then determined if necessary. AQC’s reports are presented in laymen’s terms for easy accessibility to the reader.

Phase III ESA
(Remediation of Environmental Liability)

The Phase III ESA is the remediation/clean-up phase of the Environmental Site Assessment. This remediation may involve removal and disposal of contaminated area(s) through various methods, including on-site treatment of contaminated soil, groundwater and waste streams; implementation of waste reduction plans and remedial measures; and Toxicological and Ecological Risk Assessments on contaminated sites that cannot be feasibly treated.

The Phase III ESA measures reflect the outcome of the Phase II site evaluation. Phase III is usually the last step in reforming a contaminated property. Although the Phase III ESA is the most costly and time-consuming stage in the remediation process, it is only required when an environmental concern has been identified on the site. Phase III is required under the following conditions:

  • The site exceeds contaminant concentrations permitted by the provincial/federal government.
  • The contaminant is spreading from the immediate area to adjacent properties.
  • The contaminant has potential negative health repercussions.
  • A regulatory agency has specifically requested remediation (i.e. “Clean-up Order”).

Depending on the results of the Environmental Site Assessment, the Phase III remediations may range from physically removing the site contaminant to developing site-specific criteria to allow the contaminant to stay in place (i.e. Site Specific Risk Assessment Approach).

Why Choose Air Quality Canada?

Same Day Response

Available 7 Days a Week

We use State of the Art Equipment

We work with Residential, Commercial, and Industrial Clients

Competitive Pricing

Certified Technicians with Extensive Training and Skills

We use an A2LA accredited, Third Party Laboratory