{"id":1144,"date":"2026-05-11T06:46:32","date_gmt":"2026-05-11T06:46:32","guid":{"rendered":"https:\/\/clients.madebytwins.com\/fishereng\/?page_id=1144"},"modified":"2026-06-09T12:36:46","modified_gmt":"2026-06-09T12:36:46","slug":"phase-1","status":"publish","type":"page","link":"https:\/\/clients.madebytwins.com\/fishereng\/services\/phase-1\/","title":{"rendered":"Phase 1"},"content":{"rendered":"\t\t
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Phase 1 Environmental Site Assessment\n<\/h2>\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\t\t\t\t\tThere are two distinct types of Phase 1. In Ontario, the difference between a Phase 1 Canadian Standards Association (CSA) and a Phase 1 Record of Site Condition (RSC) is essentially the difference between “private due diligence” and “regulatory law.”\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\tWhile both involve a non-intrusive investigation of a property’s history and current state, they serve different purposes and follow different rulebooks.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Phase 1 CSA \u2013 Due Diligence<\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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The <\/span>CSA Z768-01<\/b> standard is the “business” version of an environmental assessment.<\/span><\/p>

  • Goal:<\/b> To identify “Areas of Potential Environmental Concern” (APECs) so a buyer or lender knows if they are inheriting a mess.\u00a0<\/span><\/li>
  • Flexibility:<\/b> The Qualified Person (QP) can use their judgment to determine which records to check. If the property is clearly a farm with no history of chemicals, the scope might be lighter.<\/span><\/li>
  • Confidentiality:<\/b> The report stays between you, your consultant, and your lender.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Phase 1 RSC \u2013 Regulatory Law\n<\/h2>\t\t\t\t<\/div>\n\t\t
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    The <\/span>O. Reg. 153\/04<\/b> standard is a legal document required by the Ontario Ministry of the Environment, Conservation and Parks (MECP).\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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    • Goal:<\/b> To prove a site is safe for a more “sensitive” use (like turning an old warehouse into condos).<\/span><\/li>
    • The “Checklist”:<\/b> Unlike the CSA version, the RSC version is <\/span>not flexible<\/b>. The law dictates exactly how many years of title search are required (usually 25+), which databases must be checked (often 60+), and who must be interviewed.\u00a0<\/span><\/li>
    • Mandatory Phase 2:<\/b> If a Phase 1 RSC identifies a “Potentially Contaminating Activity” (PCA), you <\/span>must<\/b> proceed to a Phase 2 ESA (soil\/water testing) to file the Record of Site Condition.\u00a0<\/span><\/li>
    • Public Record:<\/b> Once filed, the RSC is posted on the Environmental Site Registry for anyone to see.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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      Note:<\/b>\u00a0<\/span><\/p>

      1. You cannot easily “upgrade” a CSA report to an RSC report later. If there is even a small chance you will need an RSC (e.g., for future rezoning), it is often cheaper to do it to the RSC standard from the start.\u00a0<\/span><\/li>
      2. Phase 1 reports, either CSA or RSC, are typically valid for 18 months from time of assessment.<\/span><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

        Phase 1 Environmental Site Assessment There are two distinct types of Phase 1. In Ontario, the difference between a Phase 1 Canadian Standards Association (CSA) and a Phase 1 Record of Site Condition (RSC) is essentially the difference between “private due diligence” and “regulatory law.” While both involve a non-intrusive investigation of a property’s history […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":22,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1144","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/pages\/1144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/comments?post=1144"}],"version-history":[{"count":85,"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/pages\/1144\/revisions"}],"predecessor-version":[{"id":3317,"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/pages\/1144\/revisions\/3317"}],"up":[{"embeddable":true,"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/pages\/22"}],"wp:attachment":[{"href":"https:\/\/clients.madebytwins.com\/fishereng\/wp-json\/wp\/v2\/media?parent=1144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}