Ontario · CSA Z769 & O.Reg. 153/04

Phase 2 Environmental Site Assessment in London

Ben Engineering offers Phase 2 Environmental Site Assessment (ESA) consulting in London, Ontario — with intrusive sampling and laboratory analysis under CSA Z769 and O.Reg. 153/04.

Request a Quote See Phase 1 ESA

Standard: CSA Z769financing & due diligence
Regulation: O.Reg. 153/04RSC, rezoning, permits
Prepared by: Licensed P.Eng & P.Geo30+ years experience
Service area: London, ONand Southwestern Ontario

What is a Phase 2 Environmental Site Assessment?

A Phase 2 ESA is an intrusive investigation involving borehole drilling, soil and groundwater sampling, and laboratory analysis, typically conducted after a Phase 1 ESA identifies Recognized Environmental Conditions.

See our Phase 1 ESA overview for more. In Ontario, Phase 2 ESAs may follow CSA Z769 (financing, due diligence) or O.Reg. 153/04 (RSC filing, rezoning, MECP applications).

Industrial and Commercial Context in London

London's industrial base spans the Oxford Street East corridor, Wonderland Road South business parks, and established manufacturing districts serving the city's role as a regional distribution hub for Southwestern Ontario.

Multi-Residential Development in London

Purpose-built apartment buildings are concentrated along Oxford Street East and West, Richmond Street, and the downtown core, where recent proposals include a 39-storey apartment tower planned for the Richmond and Oxford intersection. Properties near these commercial and industrial corridors are the ones most likely to require environmental due diligence before financing, redevelopment, or a change of use.

Why This Matters for Properties in London

London's Oxford Street corridor, historically home to industrial and commercial buildings, has seen proposals for towers as tall as 39 storeys at former commercial sites — redevelopment at this scale typically requires a documented environmental assessment before municipal approval.

How a Phase 2 ESA Is Actually Carried Out

Where groundwater is encountered, monitoring wells are installed to allow repeat sampling over time, since a single groundwater sample can be misleading if contaminant concentrations vary seasonally.

Laboratory results are compared against the applicable Ministry of the Environment, Conservation and Parks site condition standards for the property's actual and intended use, and any exceedances are clearly flagged in the final report along with recommended next steps.

Environmental Site Assessment — Overview

Nearby areas we serve

Also servicing the surrounding region

Phase 2 ESAs by area

We work across Ontario, generally within 500 km of our Vaughan head office. Each area has its own page.