Shipping Papers, SDS, and Emergency Reference Sources

Why Reference Sources Matter at a Hazmat Incident

When a truck overturns on the highway or a railcar begins leaking, firefighters operating at the hazmat operations level do not identify chemicals by smell or appearance. Instead, they rely on a system of shipping documents, product data sheets, and emergency reference tools that carriers and manufacturers are required to provide. Your job at the operations level is defensive: use these sources to recognize the hazard, protect yourself and the public, and give incident command the information needed to request specialist resources such as a hazmat team.

Shipping Papers

Federal regulations require that hazardous materials shipments be accompanied by shipping papers that identify the contents, quantity, and hazard class. The format of those papers depends on the mode of transportation.

Bill of lading (highway/truck): The bill of lading travels with the driver and must be within reach while the vehicle is moving. In an emergency, look for it in the cab—on the driver's seat, clipped to the sun visor, or in the door pocket. A Department of Transportation (DOT)-regulated entry for a hazardous material must include the proper shipping name, hazard class, identification number (UN or NA number), and packing group.

Train consist (rail): The train consist—sometimes called a wheel report or consist report—lists every car in order from the locomotive. The conductor keeps a copy in the lead locomotive cab. Copies may also be held at the originating and receiving yards. The consist tells you which car number carries what hazardous material, so you can count cars from either end to locate the problem car without approaching it.

Cargo manifest (air and vessel) / pipeline emergency response plan: Aircraft carry a dangerous goods manifest; vessels carry a cargo manifest or dangerous cargo manifest. Pipeline operators are required to maintain emergency response plans that identify the product in each segment of line. In a pipeline incident, contact the operator through the pipeline marker sign—every pipeline right-of-way must be posted with the operator's name and an emergency contact number.

Where to look, every time: Remember the acronym TRACEM later, but right now remember this rule—approach from upwind and uphill, use binoculars to read placards before you close the distance, then retrieve shipping papers only when the scene is safe enough to approach. Never enter a danger zone solely to get paperwork.

Safety Data Sheets

A Safety Data Sheet (SDS) is a standardized document that manufacturers and importers must provide for every hazardous chemical. OSHA's Hazard Communication Standard (HCS) requires SDS to follow a 16-section format.

For emergency response, the most useful sections are:

• Section 1 – Identification: product name, manufacturer, emergency phone number.
• Section 2 – Hazard identification: GHS signal word, pictograms, hazard statements.
• Section 4 – First-aid measures: exposure routes and initial care.
• Section 5 – Fire-fighting measures: suitable extinguishing agents, special hazards from combustion, protective equipment required for firefighters.
• Section 6 – Accidental release measures: spill containment and cleanup, required PPE.
• Section 8 – Exposure controls / PPE: permissible exposure limits (PEL), recommended respirator type, glove and eye protection.
• Section 9 – Physical and chemical properties: boiling point, flash point, vapor density, water solubility—all critical for predicting how a released chemical will behave.
• Section 10 – Reactivity: conditions and materials to avoid, hazardous decomposition products.

At an incident, the SDS is most useful after you have stabilized your position. Request it from the facility, the shipper, or through CHEMTREC while remaining in the cold zone.

Emergency Reference Tools

Emergency Response Guidebook (ERG): Published by the DOT (in cooperation with Transport Canada and Mexico's SEMARNAT), the ERG is the first field reference first responders should reach for. Look up the UN/NA number or proper shipping name in the yellow or blue index pages to find a three-digit guide number. That guide number leads to a page in the orange section describing potential hazards and protective action distances. The green-bordered pages give initial isolation and protective action distances for materials that are toxic by inhalation. Every apparatus should carry a current edition.

CHEMTREC: The Chemical Transportation Emergency Center (CHEMTREC), operated by the American Chemistry Council, provides 24-hour emergency assistance to responders. CHEMTREC can contact the shipper or manufacturer, provide SDS information, and connect specialists to your incident commander. Have the UN number, shipping name, and your location ready when you call.

Defensive Decision-Making with Reference Information

At the operations level, your task is to gather information and pass it up the chain—not to make entry decisions independently. Use the ERG guide page to set initial isolation distances. Cross-check the SDS for vapor density (greater than 1 means the gas is heavier than air and will accumulate in low spots) and flash point (a low flash point means flammable vapors at or near room temperature). Report findings to the incident commander and document the UN number, chemical name, quantity, and container type.

Safety Reminders

• Always approach from upwind, uphill, and upstream.
• Use PPE appropriate to your level of training and the hazard; operations-level responders do not enter the hot zone.
• Do not rely on a single reference; cross-check the ERG with the SDS and shipping papers.
• If shipping papers are not accessible safely, the ERG placard index and CHEMTREC are your starting points.