Instructions Specific to This Exam

1. This examination contains one question worth a total of 100 marks.

2. You will be assessed primarily on your knowledge of the relevant Canadian tort principles, cases, statutes and other assigned materials identified in the syllabus, together with your ability to recognize the legal issues raised by the facts, accurately state the applicable rules, apply those rules to novel circumstances and reach reasoned conclusions.

3. No marks are awarded for merely reproducing or summarizing the facts. For each material issue, identify the legal question, state the governing law, apply that law to the relevant facts and provide a reasoned conclusion.

4. Do not provide a general essay on negligence or tort law. Address only those causes of action, defences and damages issues reasonably raised by the facts.

5. Where a negligence claim is advanced, do not stop after concluding that one element may fail. Address the other material elements and defences where they remain relevant to a complete analysis.

6. Full case citations are unnecessary for authorities contained in the assigned materials. Identify relevant authorities with sufficient precision where they materially assist the analysis.

7. You are asked to prepare a memorandum of law. You do not need to construct formal memorandum headings such as “To,” “From,” “Date” or “Re.” Marks are awarded for substantive analysis.

8. In addressing negligence, distinguish carefully among:

   • duty of care;

   • standard of care;

   • factual causation;

   • remoteness;

   • intervening causes;

   • damages; and

   • available defences.

9. Where an established category of duty applies, it is unnecessary to repeat the complete general duty-of-care analysis. Where the alleged duty is novel or arises from a special relationship, address the appropriate duty analysis.

10. In addressing public-authority liability, distinguish policy decisions from operational implementation and consider whether the relationship between the public authority and the particular claimant is sufficiently proximate to support a private-law duty.

11. In addressing pure economic loss, identify the particular category, if any, into which the claim falls. Do not assume that foreseeable financial loss is recoverable merely because negligence has occurred.

12. In addressing psychiatric injury, distinguish ordinary grief, anxiety or distress from a compensable mental injury and consider whether the injury to the particular plaintiff was a reasonably foreseeable consequence of the defendant’s negligence.

13. In addressing nuisance and strict liability for the escape of dangerous substances, analyze those causes of action separately from negligence. The existence of reasonable care does not necessarily dispose of every non-negligence claim.

14. Where fault may also lie with a plaintiff, address contributory negligence and apportionment rather than treating the plaintiff’s conduct as automatically eliminating liability.

15. Assume that all defendants are financially capable of satisfying any judgment. Do not address environmental legislation, workers’ compensation, occupiers’ liability legislation, class proceedings, limitation periods, insurance coverage, criminal liability or Charter issues.

16. Write a clear and organized answer in complete sentences.

QUESTION

FACTS

Arclight Materials Recovery Inc. (“Arclight”) operates a lithium-ion battery recycling facility on the outskirts of the fictional Ontario municipality of Westhaven.

The facility receives damaged and end-of-life batteries from electric vehicles, commercial energy-storage systems and consumer electronics.

Arclight separates reusable metals and processes the remaining battery material for disposal.

The plant occupies approximately nine acres in an area historically used for light manufacturing and agriculture.

Immediately west of Arclight is Dunmere Glasshouse Ltd. (“Dunmere”), a family-owned hydroponic greenhouse operation.

Dunmere has operated on the property since 1998.

It produces specialty herbs and vegetables under long-term supply agreements with restaurants and food distributors.

A farmhouse on the Dunmere property is occupied by its majority shareholder, Mariel Stroud, her spouse Gideon Stroud, and their 16-year-old son, Calix Stroud.

Approximately 600 metres southeast of Arclight is a newer residential subdivision.

A provincial highway runs along the northern boundary of the Arclight property.

Arclight began recycling large-format electric-vehicle batteries in 2022.

That process substantially increased the volume of damaged batteries stored at the facility before processing.

By 2025, Arclight regularly had between 1,800 and 2,400 battery modules awaiting treatment.

Many were stored inside a warehouse known as Building C.

Lithium-ion batteries can enter a state known as thermal runaway if sufficiently damaged or overheated.

Once thermal runaway begins, a battery may:

• ignite;

• release toxic and flammable gases;

• heat neighbouring batteries; and

• trigger a cascading fire.

Arclight was aware of this risk.

Building C therefore contained:

• thermal sensors;

• automated alarms;

• overhead fire suppression;

• fire-resistant storage partitions; and

• a rooftop extraction and filtration system designed to remove contaminated smoke.

The extraction system discharged through two large exhaust stacks.

Arclight also stored approximately 38,000 litres of a flammable solvent used in the recycling process in a tank on the eastern side of Building C.

The tank was surrounded by a containment berm.

A national battery-recycling trade association published guidance recommending that damaged vehicle batteries be stored in small separated groups with sufficient spacing to reduce the risk of cascading thermal events.

The guidance was not legally binding.

Most large Canadian recycling facilities followed it.

Arclight did not.

To increase storage capacity, Arclight commonly stacked battery modules on steel racks approximately 30 centimetres apart.

Arclight’s engineers had previously advised senior management that increasing the spacing would reduce storage capacity by approximately 35%.

In December 2024, Arclight’s engineering director, Soren Pell, prepared an internal memorandum stating:

“Our current rack configuration materially increases propagation risk if a damaged EV module enters thermal runaway. Existing suppression should control most single-unit events, but rapid spread across adjacent racks remains possible.”

He recommended reconfiguring Building C.

The projected cost was approximately $900,000 in construction expenses and lost production.

Arclight’s chief operating officer wrote on the memorandum:

“Defer until 2026 expansion. Risk remains manageable with alarms and suppression.”

No changes were made.

The thermal sensors in Building C produced occasional false alarms.

Employees complained that each alarm required them to stop work while the system was inspected.

In March 2025, Ronan Vesk, the overnight production supervisor, discovered that the alarm system could temporarily be placed in “maintenance mode.”

While in maintenance mode, temperature readings continued to be recorded but audible alarms and automatic notifications to the control room were disabled.

Company policy permitted maintenance mode only while technicians were physically servicing the alarm system.

Ronan began using maintenance mode during particularly busy production periods.

Two senior managers learned that he was doing so.

One told him:

“I do not want nuisance alarms shutting the line down every night. Use your judgment, but do not create a paper trail that makes this look like a standing practice.”

Arclight’s written safety manual was never amended.

Several months later, Dunmere employees began noticing unusual chemical odours near the western property line.

On June 2, Mariel telephoned Westhaven’s Fire Prevention Office.

She said:

“We run a greenhouse next door. Some evenings the smell is strong enough that my workers are complaining of headaches. I am worried about what they are storing over there.”

Municipal fire inspector Elliot Marr attended Arclight on June 4.

Westhaven maintained an industrial fire-inspection program.

Its inspectors routinely inspected facilities presenting unusual fire hazards and could make recommendations, issue compliance orders where authorized and refer serious conditions to other regulatory authorities.

The program existed to promote public fire safety generally.

Elliot inspected Building C for approximately 50 minutes.

Ronan accompanied him.

During the inspection, Elliot noticed that some battery racks were packed closely together.

He also observed the control panel showing the words:

“SYSTEM — MAINTENANCE MODE.”

Elliot asked why.

Ronan replied:

“We are testing a sensor.”

That was false.

No sensor was being serviced.

Elliot did not ask when maintenance mode had been activated or review the alarm logs.

Before leaving, Elliot told Ronan:

“You should get that system back into full operation as soon as the test is finished.”

Elliot then walked to the Dunmere property.

Mariel asked:

“Is this something I should be worried about?”

Elliot replied:

“I did not see anything requiring an immediate shutdown. I would not evacuate your workers or change your operations based on what I saw today.”

Mariel says she relied on that statement.

Dunmere’s greenhouse ventilation system could be switched temporarily from outside-air intake to internal recirculation.

Running recirculation continuously was expensive and could damage certain crops.

Mariel decided to leave the system on its normal outside-air setting.

Elliot prepared a short inspection note stating:

“High battery density in Building C. Alarm temporarily in maintenance mode for stated sensor testing. Recommend follow-up.”

Under ordinary office practice, a follow-up inspection would have been scheduled within 14 days.

However, Westhaven was experiencing a shortage of fire inspectors.

The Fire Chief had issued an internal triage direction stating that inspections of:

• hospitals;

• long-term care homes;

• schools; and

• high-occupancy residential buildings

were to receive priority over industrial follow-ups unless an inspector believed there was an immediate threat to life.

Elliot classified Arclight as routine.

No follow-up occurred before the incident described below.

Elliot says this was a reasonable implementation of the Fire Chief’s resource-allocation policy.

Mariel says his own observations should have caused him to classify Arclight as urgent.

On July 18, Arclight received a shipment of battery modules from electric delivery vans damaged in a highway collision.

One module had a crushed outer casing.

A receiving employee noted the damage but did not observe smoke, heat or swelling.

The module was placed on a rack in Building C.

The following night, Ronan again put the alarm system into maintenance mode because employees were attempting to clear a backlog.

At approximately 1:12 a.m., temperature sensors recorded a rapid increase near the damaged module.

Because the alarms were disabled, the control room received no audible warning.

At 1:19 a.m., the module ignited.

The fire spread to neighbouring batteries.

At 1:24 a.m., employees noticed smoke.

They activated the fire alarm manually and called emergency services.

The overhead suppression system activated.

It slowed the fire but did not stop propagation among the closely packed battery racks.

At approximately 1:30 a.m., contaminated smoke entered the rooftop extraction system.

The extraction system had been inspected by Arclight’s maintenance department six weeks earlier.

During that inspection, a technician had photographed significant corrosion on a damper controlling airflow to one of the filtration units.

The technician’s report stated:

“Damper movement restricted. Replacement recommended within 30 days.”

The replacement part cost approximately $18,000.

Arclight postponed the repair because management expected to replace the entire extraction system during the planned 2026 expansion.

The corroded damper failed during the fire.

A substantial portion of the smoke therefore bypassed the filtration unit and was discharged through one exhaust stack.

A plume of contaminated smoke travelled west across Dunmere.

Dunmere’s ventilation fans drew outside air directly into three greenhouse buildings.

Within approximately 20 minutes, employees began reporting eye and throat irritation.

Mariel ordered the greenhouse evacuated.

The plume deposited chemical residue on:

• growing crops;

• irrigation equipment;

• ventilation systems; and

• sections of the greenhouse glazing.

Approximately $780,000 in crops ultimately had to be destroyed.

Cleaning and replacing contaminated equipment cost an additional $460,000.

Dunmere could not produce saleable crops for approximately seven weeks.

The night of the fire, Gideon was at the farmhouse when he saw employees running from the greenhouse.

He went outside.

Two Arclight employees had escaped Building C through a side door but told Gideon that another worker, Tomas Erlen, was still inside a maintenance room near the western wall.

Flames were visible through the roof.

Firefighters had not yet arrived.

Gideon ran toward Building C.

An Arclight employee shouted:

“Do not go in. The batteries can explode.”

Gideon nevertheless entered through the open side door.

He later says:

“I could hear Tomas yelling. I thought he was going to die.”

Gideon located Tomas approximately 15 metres inside the building.

As they were leaving, several battery modules exploded.

A metal fragment struck Gideon’s leg.

He suffered multiple fractures and nerve damage.

He has undergone three surgeries.

Doctors expect permanent weakness in the leg.

Tomas suffered smoke inhalation but survived.

Calix had followed his father outside.

He remained on the Dunmere property approximately 90 metres from Building C.

He saw Gideon enter.

Several minutes later, Calix saw the explosion and saw employees carry his father from the building covered in blood.

Calix believed Gideon had died.

For several weeks afterward, Calix experienced nightmares and refused to leave the farmhouse.

He was eventually diagnosed by a psychiatrist with post-traumatic stress disorder.

The psychiatrist considers the condition genuine and says it was caused by witnessing the explosion and believing that Gideon had been killed.

Calix had experienced ordinary examination anxiety before the incident but had no previous psychiatric diagnosis.

The evacuation also affected another company.

Northstead Provisioners Ltd. (“Northstead”) had an exclusive supply agreement under which it purchased approximately 70% of Dunmere’s annual herb production.

Northstead did not own property near Arclight.

None of its employees was physically injured.

After Dunmere’s crops were destroyed, Northstead had to purchase herbs from suppliers in California and Mexico at substantially higher prices.

It claims approximately $540,000 in additional purchasing costs and lost profits.

Northstead says Arclight knew Dunmere was a commercial greenhouse and should have foreseen that destroying Dunmere’s production would financially harm companies that depended on it.

Arclight had never dealt with Northstead and did not know that Dunmere had an exclusive supply arrangement.

The incident also caused the provincial highway beside Arclight to be closed for 18 hours.

Approximately 40 nearby businesses were temporarily inaccessible.

One of them, a distribution company, has threatened a claim for lost revenue but has not retained your firm.

For purposes of this examination, you need not advise any claimant other than those expressly identified below.

Fire investigators concluded that the original battery module probably entered thermal runaway because of internal damage sustained before it arrived at Arclight.

No employee intentionally started the fire.

Three engineering experts have provided opinions concerning causation.

All agree that Arclight did not cause the initial internal defect in the module.

They disagree about what would have happened afterward.

Dunmere’s expert states:

“Had the alarm system been fully active, staff would probably have detected the temperature rise between seven and ten minutes before ignition. Isolation of the affected rack during that window would, more likely than not, have prevented propagation beyond the original module.”

Arclight’s expert says staff would have had only a short period to react and that:

“It is impossible to say whether an employee could safely have isolated the module before ignition.”

Both experts agree that greater spacing between racks would probably have reduced the scale of the fire even if the first module still ignited.

They also agree that, had the extraction damper functioned properly, the quantity of contaminated smoke leaving the facility would probably have been reduced by approximately 80%.

Arclight says the initial battery defect was an independent event for which it was not responsible.

It also argues that the extraordinary combination of:

• the defective incoming module;

• failure of suppression to contain the fire;

• the damper malfunction; and

• wind blowing directly toward Dunmere

was too unusual to make the full extent of the damage reasonably foreseeable.

Meteorological records show that winds blowing from Arclight toward Dunmere occur approximately 18% of the time during summer nights.

Arclight further says Dunmere contributed to its own property losses by continuing to operate outside-air ventilation after Elliot’s June inspection.

Dunmere responds that it was specifically reassured by a municipal fire inspector and had no reason to incur substantial losses by operating in recirculation mode indefinitely.

Arclight also argues that Gideon acted recklessly by entering a burning lithium-battery facility after being expressly warned about explosion risk.

Gideon accepts that the entry was dangerous but says:

“Someone was alive inside. There was no time to wait.”

Arclight’s insurer has also raised the possibility that Gideon voluntarily assumed the risk of injury.

Following the fire, investigators reviewed Arclight’s internal documents.

They discovered:

• Soren’s December 2024 warning about rack spacing;

• records showing repeated use of maintenance mode;

• the senior manager’s instruction not to create a “paper trail”; and

• the unrepaired damper report.

Arclight’s board says senior management never expected a fire of this magnitude and never intended anyone to be injured.

It accepts that some safety decisions were poor but denies that they justify punitive damages.

Dunmere, Mariel, Gideon and Calix have retained your firm.

Northstead has separately asked whether it has a viable tort claim and has authorized your firm to include that issue in the memorandum.

The clients are considering claims against:

• Arclight;

• Ronan personally, if appropriate; and

• the Municipality of Westhaven.

For purposes of this examination:

• assume Ronan was acting in the course of his employment whenever he dealt with Arclight’s alarm system;

• assume Arclight owned and controlled Building C, the solvent tank and the extraction system;

• assume no environmental statute creates a separate civil cause of action;

• assume Dunmere’s crop and equipment values stated above are accurate; and

• do not address any claims by Tomas or other Arclight employees.

QUESTION

The senior partner asks you to prepare a brief but comprehensive memorandum advising Dunmere, Mariel, Gideon, Calix and Northstead on the significant Canadian tort-law issues arising from the incident.

Your memorandum should assess the principal causes of action against Arclight and Westhaven, any material personal liability of Ronan, the strongest defences available to the defendants, and the principal categories of damages potentially recoverable by your clients.

Where liability may arise under more than one tort, analyze the causes of action separately.

Where a claimant seeks only financial loss unconnected to physical injury or damage to that claimant’s own property, address the special restrictions governing recovery of pure economic loss.

100 MARKS