Phase II or Phase Two
Environmental Site Assessment?

A Phase II or Phase Two ESA is an intrusive study in which soils and groundwater samples are tested.

In Ontario Phase 2 ESAs are generally conducted in accordance with one of two protocols, notably the Canadian Standards Association (CSA Z-769/00 guidelines) for Phase II ESAs, and Ontario Regulation 153/04 (O.Reg.) for Phase Two ESAs, depending on the purpose.


Phase II ESA:
CSA Standard

CSA Z-769/00

Due-Diligence
Pre-Purchase Condition
Financing or Refinancing
Property Purchase/Sale
Property Insurance Condition

Phase II Project Scope

Public & Private Locates
Identification of Applicable Site Condition Standards

  • Borehole Drilling
  • Monitoring Well Installation
  • Test Pits
  • Samples Screening and Selection
  • Laboratory Testing
  • Data Analysis

Phase Two ESA:
O.Reg Standard

O.Reg. 153/04

Record of Site Condition
(RSC) required for change to more sensitive land use

Town/City Planning Departments
(for re-zoning, site plan control and/or building permit)

Phase Two Project Scope

Public & Private Locates
Preparation of Sampling & Analyses Plan
Identification of Applicable Site Condition Standards

  • Borehole Drilling
  • Monitoring Well Installation
  • Test Pits
  • Samples Screening and Selection
  • Laboratory Testing
  • Data Analysis

Following successful completion of a Phase Two ESA and any required remediation, a Record of Site Condition (RSC) can be filed with the Ministry of the Environment & Climate Change (MOECC) for inclusion into the Environmental Bill of Rights Registry.


Phase II ESA
Phase Two ESA
Phase 2 ESA
Phase II Environmental Site Assessment
Phase II or Phase Two Environmental Site Assessment