This article presents a simple, seven-step approach for staying compliant with the HMRs. (Although U.S. and Canadian authorities offer reciprocity, this article will mirror U.S. regulatory compliance.)

Step 1: Classification & Identification

S – shipping name — Assigned to the hazmat by the regulations, it is not a trade name, rather the name found in the Hazardous Materials Table, 49 CFR §172.101. Proper shipping names are listed in Column 2, with bold-faced text, and descriptions in italics.

H – hazard class — This refers to the type of danger. There are nine classes, further divided into divisions. An example would be Division 1 of Class 6 written as “Class 6.1.” In addition, some materials possess multiple hazards. The primary class represents the greater risk during transportation. The subsidiary (AKA secondary) risk designates all other dangers. For example, METHANOL is flammable and toxic; therefore, in the hazmat table, it would read (in Column 3) “Class 3 (6.1)” or “3 (6.1).”

I – identification number — A four-digit numerical code preceded by the letters “UN” or “NA.” UN numbers are taken from the international standard, while “NA” numbers are used for domestic transportation only, assigned by the DOT.

P – packing group — This refers to the severity of the hazard. More specifically, Column 5 (PG) in the table contains Roman numerals I (great danger), II (medium danger) or III (minor danger).

Step 2: Packaging

non-bulk, the most common packages, have internal volumes of 119 gallons (450 L) or less.

Non-bulk packaging is further classified as single, combination or composite packaging, per §171.8.

Figure 1

Step 3: Marking & Labeling

The overt way of identifying hazmat is recognizing the shipping name, identification number, hazmat label(s) and UN marking on the package. Hazmat liquids also require orientation marks (as do dangerous goods shipped via air), as seen in Figure 1.

Step 4: Documentation

Proper hazmat shipping paperwork is a critical part of the regulatory spectrum. Consider the scenario of a firefighter arriving at a tank-truck spill with placards torn off or covered, and an unconscious driver. Without placards, firemen are trained to look in the driver-side door pouch for the BOL (bill of lading). First responders will check the “S-H-I-P” contents, including the UN number on the far left of the BOL, then refer to his/her ERG (Emergency Response Guidebook) for proper response details. Also required on the BOL is a 24-hour emergency phone number.

Step 5: Placarding

Think of placards as “labels” for bulk (120+ gallons, 883+ pounds) hazmat carriage. Whether stationary storage tanks or mobile tankers cruising down your local highway, the DOT requires placards on all four sides. According to 49 CFR §172.332(c), placards must be durable, of specific sizes (at least 10.8” square-on-point) and affixed prior to loading. Placards must be removed following offloading. They may contain a four-digit identification code (e.g., 1075), text of the hazard (e.g., Flammable Gas), or simply a word like “Dangerous.”

Step 6: Loading

The loading and unloading of hazardous materials is certainly a form of handling. What good are proper labeling, packaging and placards if Class 1.1 dynamite is placed adjacent to a pallet of blasting caps on a trailer? Therefore, 49 CFR details procedures for safe loading and segregation (see §177.848). Issues like securing and lashing of cylinders, not smoking, securing parking brake, and more, are covered.

Step 7: Reporting

According to the HMRs, proper reporting of certain incidents like spills must be made immediately via phone, or routinely via written reports. Immediate reports include hazmat incidents during loading, unloading or temporary storage. The person in “physical possession of the hazardous materials” has up to 12 hours to report the incident by calling the NRC’s (National Response Center) toll-free number. Written reports require the use of DOT Form F 5800, and a copy must be retained for two years.