Phase II Testing and Remediation Practice Questions

Question 1 of 5

What environmental assessment should be conducted during an underground storage tank removal?

• ANo environmental assessment is needed during tank removal, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation, and given that the property's current and historical use is consistent with the surrounding land use pattern and there are no identified sources of potential contamination on or adjacent to the site
• BSoil testing is only required if the tank was known to be leaking, given that the property's current and historical use is consistent with the surrounding land use pattern and there are no identified sources of potential contamination on or adjacent to the site, and as the environmental history of the property based on available records and site observations does not indicate contamination concerns that would require remediation, given that the property's current and historical use is consistent with the surrounding land use pattern and there are no identified sources of potential contamination on or adjacent to the site
• COnly a visual inspection of the tank pit is required, as the environmental history of the property based on available records and site observations does not indicate contamination concerns that would require remediation, and given that the property's current and historical use is consistent with the surrounding land use pattern and there are no identified sources of potential contamination on or adjacent to the site, as the environmental history of the property based on available records and site observations does not indicate contamination concerns that would require remediation
• DStandard environmental assessment during tank removal includes: (1) pre-removal site assessment — document tank location, size, contents, and surrounding conditions, (2) soil sampling during excavation — collect samples from the excavation base and sidewalls at the tank location, paying particular attention to areas near fittings, fill ports, and piping connections where leaks are most common, (3) laboratory analysis — soil samples are analysed for petroleum hydrocarbons (PHCs) and any other contaminants associated with the tank contents, (4) groundwater assessment — if groundwater is encountered during excavation, samples should be collected and analysed, (5) photographic documentation — record excavation conditions, tank condition, soil conditions, and any evidence of contamination (staining, odour, product), (6) if contamination is confirmed, additional delineation sampling determines the extent, and remediation planning begins, and (7) a closure report documents all findings and is essential for property records

Question 2 of 5

A Phase 2 ESA finds contamination, but a risk assessment determines the contamination poses no significant risk to human health or the environment under the property's current use. Can the buyer proceed safely?

• AAny contamination found means the property is unsafe regardless of risk assessment, and based on the environmental assessment protocols that evaluate contamination risk, remediation requirements, and compliance status under the applicable provincial legislation, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation
• BRisk assessment eliminates all future liability related to the contamination, and based on the environmental assessment protocols that evaluate contamination risk, remediation requirements, and compliance status under the applicable provincial legislation, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation
• CRisk assessments are not recognized under Ontario environmental regulations, and under the environmental due diligence framework that includes Phase I investigation, potential Phase II testing, and remediation planning as circumstances require, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation
• DRisk assessment is a legitimate regulatory tool in Ontario: (1) O. Reg. 153/04 allows a risk assessment approach where contamination exceeds generic standards but site-specific analysis demonstrates acceptable risk under defined conditions, (2) the risk assessment considers exposure pathways — if contamination in deep soil cannot reach building occupants or groundwater users, the risk may be acceptable, (3) a Record of Site Condition can be filed based on risk assessment rather than generic standards, (4) however, risk assessment may come with conditions (institutional or engineering controls) that restrict future use or require ongoing monitoring, (5) the buyer should understand that risk assessment acceptance means contamination remains in place — this may affect future resale, financing, and use flexibility, and (6) the buyer should obtain legal and environmental professional advice before accepting risk-assessment-based outcomes

Question 3 of 5

What remediation is typically required for a property confirmed as a former marijuana grow operation?

• AComprehensive grow-operation remediation typically includes: (1) mould assessment and remediation — testing all building materials, removing and replacing contaminated drywall, insulation, and ductwork, and treating structural elements, (2) chemical decontamination — cleaning all surfaces that may have been exposed to fertilizers, pesticides, and other growing chemicals, (3) electrical system assessment and repair — licensed electrician inspection and correction of all non-code electrical work, (4) HVAC cleaning or replacement — ductwork contaminated with mould spores must be professionally cleaned or replaced, (5) structural repairs — restoration of removed walls, repaired water damage, and correction of any structural modifications, (6) air quality testing — post-remediation testing to confirm indoor air quality meets acceptable standards, and (7) a remediation report from a qualified professional documenting all work performed, which becomes part of the property's record
• BPainting the walls is sufficient remediation for mould from grow operations, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation
• CA standard cleaning is sufficient for grow-operation remediation, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation
• DGrow-operation remediation is identical to standard home renovation, given that the property's current and historical use is consistent with the surrounding land use pattern and there are no identified sources of potential contamination on or adjacent to the site, given that the property's current and historical use is consistent with the surrounding land use pattern and there are no identified sources of potential contamination on or adjacent to the site

Question 4 of 5

A property owner successfully completes all remediation required by an environmental compliance order. What documentation should they obtain?

• AThe property owner should obtain comprehensive closure documentation: (1) a letter from the MECP confirming compliance with the order and its terms are satisfied, (2) a Phase 2 ESA or post-remediation sampling report confirming contaminant levels meet applicable standards, (3) a Record of Site Condition (RSC) filed with the Environmental Site Registry — this provides formal regulatory documentation of the property's environmental status, (4) copies of all laboratory results, remediation reports, and professional correspondence, (5) the consultant's final report documenting all work performed, volumes of contaminated material removed or treated, and confirmation results, and (6) this documentation package is essential for future property sale — it demonstrates the environmental issue was identified, addressed, and resolved to regulatory standards
• BThe environmental consultant's invoice serves as proof of compliance, and under the environmental due diligence framework that includes Phase I investigation, potential Phase II testing, and remediation planning as circumstances require, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation
• CA verbal confirmation from the MECP is sufficient, particularly where the Phase I environmental site assessment did not identify any recognized environmental conditions requiring further investigation, as the environmental history of the property based on available records and site observations does not indicate contamination concerns that would require remediation
• DNo documentation is needed once the work is complete, and under the environmental due diligence framework that includes Phase I investigation, potential Phase II testing, and remediation planning as circumstances require, as the environmental history of the property based on available records and site observations does not indicate contamination concerns that would require remediation

Question 5 of 5

When is a Phase 2 Environmental Site Assessment required?

• APhase 2 is required for every commercial property transaction in Ontario, under the environmental due diligence framework that includes Phase I investigation, potential Phase II testing, and remediation planning as circumstances require
• BPhase 2 is a cheaper alternative to Phase 1 for quick results, based on the environmental assessment protocols that evaluate contamination risk, remediation requirements, and compliance status under the applicable provincial legislation
• CPhase 2 is only required when the property is visibly contaminated, based on the environmental assessment protocols that evaluate contamination risk, remediation requirements, and compliance status under the applicable provincial legislation
• DA Phase 2 ESA is recommended when a Phase 1 ESA identifies Areas of Potential Environmental Concern (APECs) that warrant physical investigation — it involves intrusive testing such as soil sampling, groundwater monitoring well installation, and laboratory analysis to determine whether actual contamination exists and its extent; it may also be required for Record of Site Condition (RSC) filings when changing property use to a more sensitive category