Ontario · CSA Z768 & O.Reg. 153/04

Phase 1 Environmental Site Assessment in London

Ben Engineering offers Phase 1 Environmental Site Assessment (ESA) consulting in London, Ontario — conforming to the CSA Z768 Standard and Ontario Regulation O.Reg. 153/04.

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Standard: CSA Z768financing & 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 1 Environmental Site Assessment?

A Phase 1 ESA is a non-intrusive investigation to identify potential environmental contamination risks on a property. No soil sampling or laboratory testing is conducted at this stage.

See our Phase 2 ESA page for more. In Ontario, the CSA Standard applies to real estate due diligence and financing; O.Reg. 153/04 applies to rezoning, building permits, or filing a Record of Site Condition.

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 1 ESA Is Actually Carried Out

In practice, the site reconnaissance is conducted by a qualified environmental professional who documents visible evidence of contamination, examines drainage patterns and surface staining, and notes the condition of any storage tanks, drums, or waste materials on site.

Interviews are conducted with the current property owner or operator, and where possible with previous owners or long-term employees, to capture institutional knowledge of past spills, storage practices, or waste handling that may not appear in the written record.

Environmental Site Assessment — Overview

Nearby areas we serve

Also servicing the surrounding region

Phase 1 ESAs by area

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