Discarded pool chemicals in Gurnee, Illinois — midway between Milwaukee and Chicago —turned a routine garbage collection into a hazardous-materials emergency Sept. 17 after a Waste Management driver noticed smoke coming from the truck and dumped its load in a parking lot, prompting road closures and shelter-in-place instructions for nearby businesses.
Firefighters responding at 10:53 a.m. initially investigated a possible vehicle fire. Instead, they found light smoke rising from the garbage. When crews applied water, the material began making crackling and popping sounds and emitting an unusual odor, according to the Gurnee Fire Department.
Firefighters found five crushed buckets buried in the debris containing calcium hypochlorite, chlorine granules, and chlorine tablets. As the chemicals became wet, they began releasing a vapor cloud. Crews backed away and requested additional hazardousmaterials resources.
Authorities closed Ambrogio Drive at Washington Street and instructed nearby businesses to shelter in place, close doors and windows, and shut down heating, ventilation, and air-conditioning systems to limit potential exposure.
The apparent fire turned out to be a chemical incident. Battalion Chief Tim Steffens told local media that the smoke and vapors resulted from a chemical reaction. No injuries were reported.
Waste Management called environmental cleanup company SET Environmental to handle the contaminated debris. Cleanup continued for hours, disrupting access to nearby businesses.
Joe Martino, who manages the household chemical waste program for the Solid Waste Agency of Lake County, warned that mixing incompatible pool chemicals can generate toxic chlorine gas and substantial heat.
Acids can react dangerously with calcium hypochlorite, while mixing cal-hypo with stabilized chlorinating products such as trichlor or dichlor can trigger violent reactions.
Martino also warned that incompatible products can turn a garbage truck into a rolling chemical hazard, potentially injuring workers or damaging the truck.
Calcium hypochlorite, commonly used in pool sanitation, is a strong oxidizer that can intensify combustion.
Pool service professionals should remind employees and customers that unwanted chemicals do not belong in ordinary household garbage or commercial trash loads.
Products should be handled according to their labels, and disposal options should be confirmed with the manufacturer or local hazardouswaste authorities. If a product is still usable, it may be applied to a pool only when treatment is needed and the label's directions are followed; adding excess chemicals simply to empty a container is not proper disposal.
Following the incident, officials encouraged residents to check with the village or the Solid Waste Agency of Lake County for disposal options. Residential household hazardouswaste programs may not accept waste generated by businesses, so service companies should verify the requirements for commercial chemical disposal separately.
A similar incident occurred Sept. 3 in Schodack, New York, about 13 miles southeast of Albany, where a discarded bucket of pool chemicals ignited recyclable materials inside a municipal recycling truck. Firefighters dumped the load to extinguish the smoldering fire.
During the response, a municipal water main ruptured as crews used a fire hydrant; the cause of the break was not established. No injuries were reported.
