Shop Emergency Response

Shop Emergency Response — What to Do When Things Go Wrong in the Bay

Written by Anthony Calhoun, ASE Master Tech A1-A8

Shops are dangerous places. Not dangerous the way people who have never worked in one think — not the kind of danger you see in movies. The real dangers in a shop are mundane and fast. A lift arm that shifts. A splash of brake fluid in the eyes. A fuel line that sprays onto a hot exhaust. A coworker who grabs a hybrid battery cable without thinking. These things happen in real shops every year, and whether someone walks away or gets carried away depends almost entirely on what happens in the first few minutes.

Most shops have fire extinguishers on the wall. Some of them have first aid kits that have not been opened since the shop opened. A fraction of them have a written emergency action plan, and an even smaller fraction have ever practiced it. That gap between having the equipment and knowing how to use it is where people get seriously hurt.

This article covers the emergencies that actually happen in automotive shops, what to do when they happen, what the law requires you to have in place, and how to build a plan that your team can actually follow under pressure.

Know Your Fire Extinguishers Before You Need Them

Every shop has fire extinguishers. Most techs have never looked closely at what type they are or what they are rated for. That information matters, because using the wrong extinguisher on the wrong fire can make the situation worse.

Extinguisher Classes and Where They Apply in a Shop

• Class A (ordinary combustibles): Paper, wood, rags, shop towels. A standard ABC dry chemical extinguisher handles this. Water works too, but water is rarely the right answer in a shop environment.
• Class B (flammable liquids): Gasoline, brake fluid, power steering fluid, solvents, carburetor cleaner. Use ABC dry chemical or BC extinguisher. Never use water on a fuel fire. Water spreads burning liquid and turns a containable fire into a catastrophe.
• Class C (electrical): Burning or energized electrical equipment, wiring, control modules. Use ABC dry chemical or CO2. CO2 extinguishers are preferred on electrical fires because they leave no residue and will not damage expensive electronics. If you can safely disconnect power to the circuit, do it first.
• Class D (combustible metals): Magnesium engine components, lithium from battery packs. Requires a Class D dry powder extinguisher or dry sand. This class is increasingly relevant as lithium-ion battery vehicles come into shops. Do not use water on a lithium battery fire — it accelerates the reaction and can cause violent steam explosions.

The ABC dry chemical extinguisher is the most common type in automotive shops and handles the majority of shop fire scenarios. CO2 extinguishers are worth having in areas where high-value electronics are serviced. If your shop works on EVs and plug-in hybrids, confirm that your response plan accounts for lithium battery fires — because a standard ABC extinguisher will not stop thermal runaway, and trying to fight it with the wrong equipment puts you in danger while accomplishing nothing.

The PASS Method — How to Actually Use an Extinguisher

Knowing where the extinguisher is and knowing how to use it are two different things. The PASS method is the universal technique:

1. Pull the safety pin from the handle.
2. Aim the nozzle at the base of the fire — not the flames. The base is where the fuel source is. Spraying the flames accomplishes nothing.
3. Squeeze the handle to discharge the agent.
4. Sweep side to side across the base of the fire until it is out or the extinguisher is empty.

Most shop extinguishers discharge for 10 to 20 seconds. That is not long. Practice locating the extinguisher, pulling the pin, and getting into position before an emergency happens. If you have never held a charged extinguisher, the weight and discharge pressure can be surprising under stress.

When to Fight and When to Get Out

Only attempt to fight a fire with an extinguisher if every one of these conditions is true:

• The fire is small — no larger than a standard trash can.
• You have a clear, unobstructed exit directly behind you.
• You have the correct type of extinguisher for the fire class.
• Everyone else in the shop has been alerted and is moving toward the exit.
• You have enough confidence to operate the extinguisher effectively.

If any of those conditions is not met, do not fight the fire. Get out, call 911, and give the fire department the information they need. No car, no tool, no part inventory, and no building is worth your life. Fire doubles in size every minute. A fire that looks manageable when you grab the extinguisher can be completely out of control twenty seconds later if the fuel source is significant.

Chemical Exposure — Eyes, Skin, and Inhalation

Chemical exposure is the most common serious injury in automotive shops. Battery acid, brake fluid, brake cleaner, coolant, solvents, refrigerant — these are everywhere in a shop, and a splash can happen faster than you can react.

Eye Exposure — The 15-Minute Rule

OSHA standard 29 CFR 1910.151(c) requires that any workplace where corrosive chemicals are used must have eyewash facilities that employees can reach within 10 seconds of the exposure point. In an automotive shop, that means the battery service area, the chemical storage area, any area where brake cleaner or refrigerant is handled, and the parts washing station all need eyewash access within 10 seconds of travel — roughly 55 feet on flat ground.

The eyewash station must deliver at least 0.4 gallons per minute for 15 continuous minutes. Portable squeeze bottles that hold eight ounces are not a substitute for a plumbed station in a high-risk area. They can bridge the gap while someone gets to a proper station, but they do not satisfy the OSHA requirement on their own.

When a chemical gets in someone's eyes, the response is immediate and non-negotiable: flush with clean water for 15 full minutes. Not 30 seconds. Not until it feels better. Fifteen minutes, timed. Chemical burns to the eye continue progressing as long as the chemical remains in contact with tissue. The flush dilutes and removes the agent. Stopping early because the person says it feels better is how people end up with permanent damage that could have been prevented.

After flushing, get the person to medical attention immediately. Bring the Safety Data Sheet (SDS) for the specific chemical. The emergency room needs to know exactly what the chemical was, its concentration, and how long exposure occurred before treatment.

Skin Exposure

For skin contact with corrosives or irritants, remove contaminated clothing immediately and flush the affected area with large amounts of water for at least 20 minutes. Trying to neutralize an acid with a base or vice versa on skin is not the right move — the reaction itself produces heat that can worsen the injury. Flush with water, then get medical attention for anything beyond minor irritation.

Safety Data Sheets — Find Them Fast

OSHA requires that Safety Data Sheets be accessible to employees for every hazardous chemical in the shop. In a real emergency, you need to be able to get to the SDS for a specific product in under a minute. That means the binder or digital system needs to be organized by product name, not filed in the order they arrived.

When you pull an SDS during an emergency, go directly to Section 4 (First Aid Measures) and Section 11 (Toxicological Information). Section 4 tells you what to do immediately. Section 11 tells the hospital what they are dealing with. You do not need to read the whole document in an emergency — know which sections matter and go straight to them.

Lift Failures and Crush Injuries

Lift-related incidents are among the most catastrophic in the shop environment. A vehicle falling from a lift or pinning someone is a life-threatening emergency that requires an immediate and disciplined response.

Daily Lift Inspection Points

Most lift failures are preventable. Before any vehicle goes up on a lift, the lift operator should verify:

• Hydraulic fluid level is correct — low fluid causes slow or uneven rise and can lead to drift.
• Locking pawls or mechanical locks engage audibly and positively at each locking position.
• Lift arms move freely and lock into position without play or wobble.
• Rubber pads are in place, undamaged, and properly seated on the arm ends.
• No hydraulic leaks are visible on the cylinder, lines, or base.
• The safety release mechanism functions correctly.
• The vehicle contact points are correct for the specific vehicle — the OEM jack point diagram must be referenced, not guessed.

Never work under a vehicle that is supported only by a floor jack. A floor jack is a lifting device, not a support device. Every vehicle that technicians work under must be supported by a properly rated lift or by properly rated jack stands placed at manufacturer-specified locations. This is not optional, and it is not situational. It does not matter how fast the job is, how light the vehicle is, or how confident you are. A floor jack can fail, tip, or be bumped. Jack stands and lifts do not fail the same way.

If a Lift Starts to Fail

If you hear a lift making unusual sounds, if a vehicle shifts position on the arms, or if you see the vehicle beginning to descend unexpectedly, the first priority is getting people clear. No diagnostic equipment, no tool, and no in-progress repair is worth staying under or near an unstable vehicle. Get clear first, then assess.

If a vehicle falls and someone is pinned, call 911 immediately. Inform the dispatcher that someone is trapped under a vehicle and give your exact address. Do not attempt to move the vehicle with improvised equipment if doing so could cause it to shift further and worsen the injury. Stabilize the vehicle if you can do so safely from outside the crush zone, but do not put additional people at risk. The fire department has the equipment to handle vehicle extrication safely.

High-Voltage Hybrid and EV Emergencies

High-voltage emergencies are the highest-stakes scenario in a modern shop. These systems operate at 200 to 800 volts DC. OSHA considers 50 volts DC to be the threshold at which electrocution risk becomes real. A base-model Toyota Prius runs its HV battery at 201 to 288 volts. A Chevy Bolt runs at 350 volts or more. A Porsche Taycan hits 800 volts. There is no margin for error.

PPE for HV Work

Before any work involving high-voltage components, the correct PPE must be on:

• Class 0 rubber insulating gloves rated to 1,000V AC / 1,500V DC, certified to ASTM D120. These go on before leather protector gloves. Inspect rubber gloves before every use — inflate them by trapping air inside and check for leaks, cracks, or deterioration. Check the certification date. Expired rubber gloves do not belong on your hands near high voltage.
• Safety glasses or face shield — arc flash from a high-voltage short is nearly instantaneous and causes severe burns and permanent eye damage.
• Insulated tools rated to 1,000V, marked with the double-triangle symbol. Standard tools with rubber comfort grips do not qualify.
• CAT III or CAT IV rated multimeter with matching leads. A CAT II meter — common in basic kits — can fail explosively when exposed to the transients present in HV automotive circuits.
• No metal jewelry. Remove rings, watches, and bracelets. Metal can complete a circuit across your skin before you realize what is happening.

De-Energization Procedure

For any HV system work, follow this sequence every time without exception:

1. Key off and remove the key, or remove the fob entirely from the vehicle for keyless systems. The vehicle must not be able to enter Ready mode.
2. PPE on before approaching the service disconnect.
3. Remove the service disconnect (also called the manual service disconnect or MSD) using the OEM-specified procedure for the exact vehicle. Location varies by make and model — always verify in OEM service information first.
4. Wait the full capacitor discharge time. This is typically five minutes for Toyota, Honda, Ford, and GM platforms. BMW specifies ten minutes. Do not skip this step. Inverter capacitors hold lethal charge after the service disconnect is removed.
5. Verify zero volts at HV bus test points using your CAT III or CAT IV meter. If any reading is above zero, stop. The system is not safe. Do not proceed until the source of residual voltage is identified and resolved.

If Someone Contacts High Voltage

DC current at high voltage locks muscles. Unlike AC shock, which may throw the victim clear, a DC contact often holds the person in place. Your instinct to grab the person and pull them free can put you in the same situation. Follow this sequence:

1. Do not touch the victim if they are still in contact with the HV source. You will become a second victim.
2. If you can disconnect the HV system or the ignition safely without touching the person or the energized circuit, do it immediately.
3. Call 911. Tell the dispatcher it is a high-voltage electrical injury. Get that information to them early so they can prepare the right response.
4. Once the person is clear of the HV source, check for pulse and breathing. Be prepared to perform CPR. High-voltage shock can cause cardiac arrhythmia that kills minutes or hours after the initial contact — even if the person is conscious and appears unharmed immediately after. Every shop working on HV vehicles should have an AED mounted on the wall.

HV Battery Fire — Evacuate, Do Not Fight

A lithium-ion battery in thermal runaway is not a fire you fight with a shop extinguisher. These fires produce hydrogen fluoride and other toxic gases. They can reignite hours or days after initial suppression. The fire department uses thousands of gallons of water to cool the battery mass enough to prevent reignition. Your ABC extinguisher cannot do that.

If smoke, unusual odor, or heat is coming from an HV battery area: evacuate the shop, call 911, and inform the dispatcher it is a lithium battery fire. Keep everyone away from the vehicle. Do not go back in.

Heat-Related Illness

Shop heat is a real hazard, particularly in summer months and in regions without climate-controlled bays. Heat exhaustion and heat stroke kill people every year, including shop workers.

Recognizing the Stages

• Heat cramps: Muscle cramping, usually in legs or abdomen. The body is losing electrolytes. Move the person to shade, give water and electrolytes, rest.
• Heat exhaustion: Heavy sweating, cool and pale skin, weakness, nausea, dizziness, headache, fast and weak pulse. Move to a cool area, loosen clothing, apply cool wet cloths, give water. If symptoms do not improve within 15 minutes, call 911.
• Heat stroke: Hot and red skin (may be dry or damp), rapid and strong pulse, confusion, loss of consciousness. This is a medical emergency. Call 911 immediately. Cool the person rapidly by any means available — ice packs on neck, armpits, and groin, cool water immersion if possible. Do not give fluids to a person who is confused or unconscious.

The difference between heat exhaustion and heat stroke is consciousness and skin temperature. If someone is confused, has hot skin, or loses consciousness, it is heat stroke — call 911 and cool them aggressively while waiting for the ambulance.

OSHA Requirements for Shops

OSHA does not require shops to have a full written emergency action plan unless the shop has ten or more employees. But even shops below that threshold have specific obligations:

• First aid kit: Required in every workplace under 29 CFR 1910.151. Contents must be adequate for the hazards present. At minimum: assorted adhesive bandages, sterile gauze pads and roller bandages, adhesive tape, nitrile gloves, antiseptic wipes, burn gel, eye wash solution, triangular bandage, scissors, CPR breathing barrier. Restock when items are used.
• Eyewash station: Required wherever corrosive chemicals are used, reachable within 10 seconds, capable of 15-minute continuous flow.
• Fire extinguishers: Required, inspected annually, with monthly visual checks. Tags must show current inspection dates.
• SDS access: Required for every hazardous chemical in the shop. Must be accessible to all employees during their shift.
• Exit routes: Must be unobstructed, marked, and adequate for the number of employees. Parts, equipment, and vehicles cannot block designated exit paths.
• Emergency action plan (written): Required for shops with 10 or more employees. Must include evacuation procedures, emergency contacts, and employee responsibilities.

Even if your shop is under the 10-employee threshold for a written EAP, not having a plan does not mean you are protected. It means when something happens, you are improvising under pressure, and people get hurt during improvised responses to emergencies.

Building a Shop Emergency Response Plan

An emergency plan is only useful if every person in the shop knows it before the emergency happens. A plan posted on the office wall that nobody has read is not a plan — it is a liability document.

Key Elements of a Workable Plan

• Emergency contacts posted visibly: 911 (never assume everyone knows to call this first), local poison control (1-800-222-1222), shop owner or manager cell number, and the nearest urgent care and hospital addresses.
• Designated roles: Who calls 911? Who handles the extinguisher? Who accounts for all employees at the assembly point? These assignments need to be made in advance, not decided during the emergency.
• Evacuation route map: Posted in each bay area. Primary exit and alternate exit for each area of the shop. The route must stay clear — permanently.
• Assembly point: A specific location outside the building where everyone goes during an evacuation. Far enough from the building to be safe, close enough that a headcount is possible. Everyone must know the location.
• Equipment locations: Every employee must know where the fire extinguishers, first aid kit, and eyewash station are. Not approximately — exactly. Walk through with new hires on day one.
• HV emergency procedure: Laminated and posted at any bay where hybrid or EV work is performed.

Practice the Plan

Walk the team through the plan at least once a year. Run through an evacuation. Show new hires where everything is and have them physically locate the extinguisher, the first aid kit, and the eyewash station. Knowing the location in theory and being able to find it in 30 seconds under stress are not the same thing.

The 30 minutes you spend on an annual safety walkthrough could prevent the kind of incident that closes a shop permanently — through injury, OSHA fines, or litigation.

Real Scenarios and How to Handle Them

Scenario: Fuel Line Fire During Repair

A tech is replacing a fuel injector and a pressurized fuel line sprays onto a hot exhaust manifold. Fuel ignites. The fire is small — contained to the engine compartment at this stage. The tech has a clear exit and an ABC extinguisher within reach. He has alerted his neighboring tech. He uses the PASS method, aims at the base of the fire, sweeps side to side. Fire is out in 12 seconds. He calls the shop manager, they call the fire department to confirm the scene is safe, and they document the incident.

What made this a close call instead of a catastrophe: the extinguisher was accessible, the tech knew how to use it, he had a clear exit, and he alerted others before engaging. Remove any one of those factors and the outcome changes.

Scenario: Battery Acid Splash

A tech is charging a deeply discharged battery and the vent cap blows. Acid splashes across his forearm and gets a small amount near his right eye. The eyewash station is eight steps away. He goes directly to it and flushes both the eye and the arm. He times it — 15 minutes. After flushing, the shop manager drives him to urgent care with the SDS for the battery acid. The eye and arm are evaluated and treated. He is back at work the next day with no permanent injury.

What saved his eye: immediate access to a functioning eyewash station and the discipline to flush for the full 15 minutes rather than stopping when it felt better.

Scenario: HV Shock in the Shop

A tech is working on a Prius hybrid system. He has removed the service disconnect but did not wait the full five-minute discharge time. He contacts a bus bar on the inverter that still holds charge. He is locked in place. His coworker sees what is happening, does not grab him, and instead reaches for the 12V battery disconnect which is accessible from outside the engine compartment. The tech is freed. 911 is called immediately. The tech is transported by ambulance and evaluated for cardiac effects. He is monitored and released the same day.

What saved his life: his coworker knew not to touch him, knew how to disconnect power without entering the circuit, and called 911 immediately even though the tech seemed okay. High-voltage cardiac effects can present hours after exposure.

Post-Incident Procedures

After any shop emergency — whether or not someone was injured — the response does not end when the immediate danger is over. What happens next determines whether the same incident happens again.

• Document everything immediately: What happened, what time, who was involved, what conditions existed, what actions were taken, and what the outcome was. Document while the details are fresh.
• Report to OSHA if required: Any fatality must be reported to OSHA within 8 hours. Any inpatient hospitalization, amputation, or loss of an eye must be reported within 24 hours. These are legal requirements, not suggestions.
• Conduct a root cause analysis: Not to assign blame, but to identify what failed. Was it a procedure that was not followed? A piece of equipment that was not maintained? A training gap? A facility issue? The root cause is rarely "the tech was careless." Usually it is a system that allowed the careless action to be possible.
• Implement corrective action: Fix the system problem. If the service disconnect procedure was not being followed because no one knew it was required, write a procedure and train to it. If the eyewash station was blocked by a parts cart, establish a policy and enforce it.
• Follow up with the injured employee: Beyond the legal requirements, the human element matters. Check in. Make sure return-to-work is handled properly and that the employee has the support they need.

The Bottom Line on Shop Safety

Most shop emergencies are survivable if the response is immediate and correct. The challenge is that emergencies do not give you time to think through what to do. That decision has to happen before the emergency — in the form of training, equipment placement, practiced procedures, and a team that knows the plan.

Every shop should be able to answer these questions without hesitation:

• Where is the nearest fire extinguisher, and is it the right type for the most likely fire in that area?
• Where is the eyewash station, and is it tested and functional?
• Where is the first aid kit, and is it stocked?
• What is the evacuation route and where is the assembly point?
• If someone contacts a high-voltage circuit, what is the first action — and what is the wrong action?
• Who is the designated first aid responder on each shift?

If your team cannot answer those questions today, that is where to start. Not after something happens. Now.