Twelve Litres on Gravel, Fifteen Metres from a Ditch

Sequence:

1. Stop and protect people. Stop the transfer, move workers upwind, keep them off the wet gravel, and put on gloves and boots before touching anything.
2. Stop the source. Right the jug and place it inside an overpack pail or a larger container; do not attempt to re-cap a split cap. Keep the damaged jug - do not rinse it out to the ditch.
3. Block the pathway before cleaning up. The priority is the 15 m of travel to the ditch: lay absorbent, soil, or a berm across the gravel between the spill and the ditch. A grassed swale is a conduit, not a filter.
4. Absorb what is on the gravel, working from the outside in, and shovel the saturated absorbent and contaminated gravel into labelled, lidded pails.
5. Report immediately. A pesticide is a pollutant under Ontario's Environmental Protection Act; a spill that has entered or may enter water must be reported without delay to the Ministry's Spills Action Centre (1-800-268-6060). Also notify the municipality/drainage superintendent, the landowner, and any downstream user.
6. Record the time, quantity, product, actions, and who was notified.

The action that makes it worse: hosing the gravel. Water carries the herbicide straight into the ditch, converts a contained 12 L spill into a watercourse contamination event, and destroys the evidence of a properly managed spill.

Should:

• Report it as part of the same notification - the receiving water and the municipal drain make this the most significant part of the incident.
• If absorbent booms or pads can be placed safely downstream without entering the water, do so; otherwise keep people out and let the responsible agency direct the response.
• Keep livestock, pets, and children away and post the ditch line.
• Note the dilution, flow, and weather for the report; take photographs.
• Follow the ministry's direction on any monitoring, and tell downstream users (including the municipality) so they can make their own decisions.

Should not:

• Do not add anything to neutralize it, and do not agitate or stir the ditch.
• Do not assume dilution solves it - the label's aquatic toxicity statement and the product's movement in water are what matter, and a Group 4 amine is not harmless to aquatic plants.
• Do not dig out or dredge the ditch without direction; that can spread contaminated sediment.
• Do not cover it up by flushing more water through.

Waste:

• Contaminated absorbent, gravel, soil, and PPE go into labelled, closed, chemically compatible containers - never into the general refuse, never burned, never spread on land.
• Dispose through a licensed waste receiver or an approved collection program for the quantity involved; keep the manifests with the spill record.
• The damaged jug: do not reuse it for any purpose. If it can be properly rinsed, triple-rinse and add the rinseate to the spray tank at the labelled rate; otherwise dispose of it as contaminated waste with the cap and label retained.
• Keep all spill records with the application records.

Site changes:

• Move the staging area away from the ditch, on a level, impermeable pad with secondary containment able to hold at least 110% of the largest container.
• Anchor containers - a spill pallet or a simple chock/strap in the truck bed - and never stage product on a slope or on gravel next to a swale.
• Upgrade the kit: drain cover, absorbent booms, a non-sparking shovel, overpack drums, and a laminated one-page spill procedure with the reporting number posted.
• Train and drill: every worker should know that the first move is to block the pathway to water, not to grab a hose.
• Keep labels legible: replace damaged jugs; a partly legible label is a compliance and safety problem before the spill happens.