Ontario · CSA Z769 & O.Reg. 153/04

Phase 2 Environmental Site Assessment in Oshawa

Ben Engineering offers Phase 2 Environmental Site Assessment (ESA) consulting in Oshawa, 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: Oshawa, 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 Oshawa

Oshawa's industrial base is anchored by the General Motors Canada manufacturing complex and the surrounding automotive supply-chain facilities in the city's south end, alongside a growing logistics sector near Highway 401.

Multi-Residential Development in Oshawa

Multi-residential development is concentrated along King Street and Taunton Road, with the downtown core and the area near Ontario Tech University and Durham College seeing continued mid-rise apartment construction. 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 Oshawa

In Oshawa, as in most established Ontario communities, a Phase 2 ESA is most often triggered by a property's proximity to active or former industrial, automotive, or fuel-handling uses, or by a proposed change to a more sensitive land use.

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.