TDG 2.43 in 10 minutes:
the generator's plain-language guide

The Transportation of Dangerous Goods regulation governs how hazardous material moves on Canadian roads. Most small generators assume it's entirely a trucking-company problem. It mostly is — but not entirely, and the gap is exactly where shops and clinics get exposed.

The three things a generator actually owns

Classification. Before anything moves, the material has to be correctly identified — its class, its UN number, its packing group. You don't have to be the one who assigns it, but you do have to give an accurate description of what you're handing over. “Miscellaneous shop waste” is not a classification, and pretending you don't know what's in the drum doesn't transfer the risk.

Packaging and marking. Dangerous goods travel in packaging matched to their class, marked and labelled correctly. For a generator, the practical version of this is: use the containers your carrier supplies, don't decant material into unmarked vessels, and don't mix incompatible streams into one container.

Documentation. A shipping document — the manifest — travels with regulated waste. As the generator, you sign it, and you keep your copy. That signature is you attesting that what's described is what's actually in the package.

What you don't own

You are not responsible for the driver's certification, the vehicle placarding, the route, or the carrier's emergency-response obligations. A certified carrier holds all of that. This is the entire value of handing your waste to a licensed operator: the heavy, technical compliance load moves to someone whose job is to carry it.

The “2.43” part

TDG certification is renewed on a cycle, and the version number simply refers to the current training standard a certified handler has been assessed against. When you see a carrier describe a driver as certified to current standards, that's what it means — the person handling your material has been trained and tested against the regulation as it stands today, not as it stood a decade ago.

Where the threshold line sits

Not everything you'd call “chemical waste” is a dangerous good. There are quantity and concentration thresholds below which material falls outside the full TDG regime — which is the whole basis for a non-hazardous chemical stream. The catch is that the determination requires actually knowing your material, and “probably under the limit” is not a defence if you're wrong. When a stream sits near the line, the safe move is to have it screened rather than assumed.

The 10-minute takeaway

• Know what's in your containers and describe it honestly.
• Use supplied, marked packaging; never mix incompatible streams.
• Sign and keep your manifest — it's your proof of correct handoff.
• Let a certified carrier own the transport-side compliance. That's what they're for.

Do those four things and your generator-side TDG obligations are, in practice, met. Everything more technical than that is our problem, not yours.