Forty Gallons of Acid, a Storm Drain, and a Coughing Custodian
At 03:10 you are delivering to a plating shop. While you are lowering a 55-gallon drum of hydrochloric acid (UN1789, Class 8, PG II, 30 percent solution, roughly 9.6 pounds per gallon) on the liftgate, the pallet tips and the drum ruptures on the dock edge. You estimate 35 to 40 gallons ran across the concrete, and part of it disappeared into a storm drain grate about 15 feet away. Nobody is hurt. The shop's night custodian is coughing and holding a rag over his face about 20 feet downwind. A light breeze is pushing vapor toward the shop's open bay door, where two more people are working. Your spill kit holds 10 pounds of soda ash, four pads, and a 5-gallon bucket. The shipping paper is in the cab, and the emergency response number on it is the shipper's staffed 24-hour line.
1. What are your first actions, and what must you deliberately not do?
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Move people, not product. Get upwind, move the custodian and the two workers out of the bay and away from the vapor, and keep anyone from walking through the puddle or the drain area. Call 911, because a fuming acid release with a drain involved and people coughing is a fire-department response with PPE and a hazmat capability you do not have. Then call the number on the shipping paper, identify the material and the quantity, and pull the ERG guide for hydrochloric acid.
What you must not do: do not try to neutralize 40 gallons with 10 pounds of soda ash. You will generate heat, use up the reagent in the first few square feet, and leave the rest running. Do not enter the vapor cloud or kneel in the puddle to place pads. Do not hose it down, because that pushes acid into the drain faster and aerosolizes it. Do not let anyone throw absorbent into the storm drain or stuff rags in the grate while the acid is still flowing.
What you can do from outside the hazard area: use pads and available absorbent to dike the edges and slow the spread away from the drain, and stage the bucket for the responders. Acid on concrete also produces fumes, and acid on metal produces hydrogen, so keep ignition sources and people away from nearby steel and drains.
2. Analyze notification duties. Is this a DOT reportable incident? Is a National Response Center call required?
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Two separate questions, two separate tests.
DOT incident reporting: the criteria include a death, an injury requiring admission to a hospital, evacuation of the general public for an hour or more, closure of a major transportation artery or facility for an hour or more, certain radioactive and etiologic agent events, and a catch-all for any situation of such a nature that in the carrier's judgment it should be reported. As it stands at minute one, nobody has been hospitalized, but the custodian is symptomatic and the vapor is moving toward an occupied bay. If he is transported or admitted, or if the building is evacuated for an hour, the incident is reportable. The catch-all also points toward reporting, since there is a continuing danger at the scene. Reportable means immediate telephone notice to the National Response Center at the earliest practicable time, followed by a written report on DOT Form 5800.1 within 30 days.
CERCLA: hydrochloric acid has a reportable quantity of 5,000 pounds. Forty gallons at about 9.6 pounds per gallon is roughly 385 pounds, well below the federal reportable quantity, so the CERCLA threshold alone does not compel a call.
But the storm drain changes the practical answer. A discharge to a drain that reaches waters of the United States triggers Clean Water Act notification regardless of the CERCLA quantity, and states frequently set lower thresholds. Call the National Response Center, 1-800-424-8802, and the state environmental hotline. The call is cheap; the unlogged release to a waterway is not.
3. What do you control, preserve, and document at the scene while responders work?
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Control: keep the exclusion zone and the upwind path clear, keep the shipping paper in hand so you can read the proper shipping name, UN number, class and packing group to the incident commander, and be the person who knows what else is on the truck and where it sits. If there is other freight on the trailer, confirm nothing else is damaged and tell the responders what is loaded.
Preserve: do not clean up beyond diking, do not move the ruptured drum, and do not let the consignee wash the dock down. The failed drum, the pallet, and the liftgate position are evidence of how the package failed. Photograph the drum, the pallet, the liftgate, the puddle, and the drain before anything is moved, and note the time, weather, wind direction, and who was present.
Document: notify your carrier's 24-hour line and the shipper, get the shipper's incident number, record the quantity estimate and how you derived it, keep your copy of the shipping paper, note the names of the responders and the custodian, and write your statement the same day while the sequence is fresh. Do not speculate about fault, do not sign anything from the consignee beyond a receipt, and do not discuss liability at the scene. This is also a good moment to look honestly at the securement and handling: a 55-gallon drum on a liftgate at 03:10 with one person is a handling decision that will be examined, and your notes should describe what was actually done, not what should have been.