Choosing a laboratory for Phase II ESA work in Ontario

The laboratory you choose for a Phase II Environmental Site Assessment affects not just the quality of the data, but the defensibility of the report. Regulators and property owners both rely on the analytical results to make decisions with significant financial and legal consequences. This article outlines the key factors to evaluate before you commit to a laboratory.

Accreditation: what to look for and what to ask ¶

In Ontario, laboratories performing environmental testing for regulatory purposes should hold accreditation under the Standards Council of Canada (SCC) framework or an equivalent recognised body. Accreditation means the laboratory has been assessed by an independent body against a defined quality standard, and that its methods, equipment, and QA/QC procedures have been reviewed.

Ask the laboratory for its current scope of accreditation. A document that lists the specific parameters and matrices for which it is accredited. A laboratory may be accredited for water testing but not for soil, or accredited for metals but not for organic compounds. The scope should cover the parameters you need for your specific project.

Method compatibility with Ontario's RSC process ¶

Ontario's Record of Site Condition (RSC) process, administered by the MECP, requires that analytical results be generated using methods compatible with the applicable Ontario standards. The MECP's Soil, Ground Water and Sediment Standards document specifies the analytical methods and detection limits required for each parameter.

Before submitting samples, confirm with the laboratory that its methods for your specific parameter list are compatible with the current MECP requirements. This is particularly important for PHC fractions, where the method used affects how the fractions are defined and reported, and for metals where the digestion procedure affects the comparability of results to the standard.

Turnaround, communication, and report format ¶

For Phase II ESA work, turnaround time affects the project schedule and, in some cases, the transaction timeline for a property sale or financing. Confirm the laboratory's standard and rush turnaround times in writing at the start of the project, and ask how they communicate if a delay occurs.

The report format matters for regulatory submission. Results should be presented with the method citation, the detection limit, the result, the unit, and the applicable guideline value in a single table. A report that requires the consultant to manually cross-reference results against a separate guideline document adds time and introduces the possibility of error.

If you are evaluating laboratories for an upcoming Phase II project, we are happy to walk through our scope of accreditation, method citations, and report format before you commit. Contact us to arrange a brief conversation.