Ontario · CSA Z769 & O.Reg. 153/04

Phase 2 Environmental Site Assessment in Cornwall

Ben Engineering offers Phase 2 Environmental Site Assessment (ESA) consulting in Cornwall, Ontario — conducted under CSA Z769 and Ontario Regulation 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: Cornwall, 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 Cornwall

Cornwall's industrial base is centred on Boundary Road, Marleau Avenue, and Campbell Street in the city's east end, home to established distribution and light-manufacturing buildings including the Cornwall Business Park lands.

Multi-Residential Development in Cornwall

Multi-residential and commercial development is concentrated along Pitt Street downtown and Second Street East, with several mid-rise apartment buildings and ongoing conversions of former industrial sites — including a proposed apartment building on a former industrial property on Guelph Avenue — adding new rental supply. 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 Cornwall

Cornwall's industrial sites along Boundary Road and Marleau Avenue, many dating to mid-20th-century manufacturing, are common candidates for Phase 1 and Phase 2 ESAs whenever they change ownership, use, or zoning designation.

How a Phase 2 ESA Is Actually Carried Out

Borehole locations are selected based on the Phase 1 findings, typically targeting areas of suspected historical spills, former tank locations, or drainage points where contaminants would be expected to accumulate.

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.

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.