Water is usually a fire’s enemy. In the account presented by residents suing Bio-Lab and its corporate owners, water became an accelerant to a chemical emergency.

At about 5 a.m. on September 29, 2024, a fire started inside Plant 12 at Bio-Lab’s pool-chemical facility in Conyers, Georgia, according to the complaint. The plaintiffs say the fire activated a corroded sprinkler component. Water then reached chlorinated isocyanurates, chemicals that can decompose when wet, generating heat and releasing hazardous gases.

The reaction allegedly fed multiple fires and a dense plume beyond the plant. Plant 12 ultimately collapsed. The complaint, citing the U.S. Chemical Safety and Hazard Investigation Board, says the surrounding area remained an active unified emergency scene for nearly four weeks.

A fire system met a chemical that reacts with water

The plant processed and stored trichloroisocyanuric acid, commonly called TCCA, along with sodium dichloroisocyanurate and other oxidizers used in swimming-pool products. In a pool, a large volume of water disperses heat and absorbs reaction products. A small, uncontrolled amount of water can create a very different result.

The complaint explains that wet TCCA can begin an exothermic reaction, meaning it releases heat. The chemical can decompose into chlorine gas and nitrogen trichloride. If heat accumulates faster than it escapes, the reaction can intensify, ignite combustible material and create an explosion hazard.

Conceptual sequence based on the complaint’s characterization of a July 2026 CSB investigation report. The diagram does not represent measured quantities or an independent reconstruction.

The sequence matters because the danger was allegedly familiar. The filing cites industry storage guidance calling for TCCA to be kept dry, cool, ventilated and protected from moisture. It also cites a 2001 Environmental Protection Agency alert that reportedly identified at least 11 pool-chemical fires from 1996 through 2000, most involving small amounts of water or incompatible materials.

The safety challenge was not simply extinguishing a flame. It was preventing firefighting water, leaks or moisture from reaching chemicals that could intensify the emergency.

The prior incidents at Conyers

The plaintiffs’ theory depends heavily on history. They argue that earlier fires and chemical releases gave the companies repeated notice of the facility’s water-reactive hazards. These incidents are allegations and descriptions within the complaint, not findings made in this lawsuit.

The complaint also says inspections and investigations had identified improper chemical storage, deteriorating fire-protection equipment and failures to assess known hazards. It reports that a 2022 Rockdale County Fire Rescue inspection found at least 69 chemicals at the plant, 48 of them presenting health hazards. The underlying inspection records were not part of the supplied material.

The lawsuit puts corporate finance inside the causal chain

Bio-Lab is described as KIK’s swimming-pool and spa chemical division. KIK acquired Bio-Lab in 2013, and Centerbridge acquired KIK in June 2015. The plaintiffs do not treat those ownership relationships as background. They argue that budgeting and capital allocation affected what safety work the plant could perform.

The complaint alleges Centerbridge kept KIK undercapitalized and exercised control over investment in safety infrastructure. It says Centerbridge forced KIK to distribute roughly $484 million in dividends, an amount the plaintiffs say exceeded Centerbridge’s equity in KIK. It also alleges that KIK later needed $170 million in loans in December 2021 for working capital and reconstruction of another Bio-Lab plant in Lake Charles, Louisiana.

That financial theory is consequential, but it remains unproven in the supplied record. The complaint does not include the underlying loan documents, dividend records, board materials or capital budgets. Nor does it independently demonstrate which requested Conyers safety projects, if any, were rejected because of those distributions.

The costs moved beyond the plant fence

At about 1:10 p.m. on the day of the fire, Rockdale County authorities ordered residents between Sigman Road and Interstate 20 to evacuate, according to the complaint. Residents north of Sigman Road were told to shelter inside. At about 8:30 p.m., the county expanded the shelter order across Rockdale County.

The filing says Interstate 20 closed in both directions between Salem Road and Turner Hill Road. Nearby roads and railroad operations were also suspended. Piedmont Rockdale Hospital reportedly evacuated patients and operated on diversion status, while schools, businesses and government services closed or changed operations.

Rockdale County Public Schools remained closed during the week of September 30 through October 4, the complaint says. The district later used remote instruction and did not return to in-person classes until October 21. More than 16,500 students were affected, according to the complaint’s description of the CSB investigation.

The named plaintiffs allege respiratory problems, burning or irritated eyes, throat symptoms, headaches, skin irritation and aggravation of existing conditions. They also claim property damage, displacement expenses, interrupted work, diminished property values and loss of the use of homes or businesses. Those individual health and property claims have not been tested through evidence or decided by a court.

The complaint further reports that hundreds of Atlanta-area residents visited emergency departments or clinics and that more than 700 people called the Georgia Poison Center. It says the EPA continued detecting chlorine near the plant above what the complaint calls a safe level through October 11, while off-gassing and smoldering continued into early October. The underlying monitoring results and medical records were not included.

What the plaintiffs want the court to do

The lawsuit proposes a class covering people and entities within 25 miles of the Conyers plant, as well as those subject to evacuation orders, shelter directives or related advisories who allegedly suffered compensable losses. That proposed definition has not been approved. A case does not become a class action merely because plaintiffs request one.

The requested relief includes compensatory and punitive damages, attorneys’ fees, a medical-monitoring fund and alternative housing during cleanup. The plaintiffs also seek air and groundwater testing, public disclosure of plume contents, fence-line monitoring, residential and public-area cleanup, improved fire-suppression systems and a publicly available process-hazard analysis.

These are requests, not remedies already awarded. The complaint’s assertion that medical monitoring is necessary is likewise a claim that would require legal and evidentiary support.

What the filing does not answer

The complaint offers a detailed account of what the plaintiffs believe went wrong, but several central issues remain open. The supplied source contains no defendants’ answer, denial or alternative account. It also does not show whether a court has accepted jurisdiction, certified a class or ruled on any claim.

The fire’s regional consequences are described in concrete terms: displaced residents, closed roads, interrupted schools, a diverted hospital and weeks of concern about the air. The harder legal question is how responsibility moves up the corporate structure from a failed component and chemical warehouse to budgets, dividends and ownership control.

The plaintiffs have drawn that line. The defendants have not answered it in the supplied record, and no court has accepted it. The strength of the case will depend on whether maintenance records, safety budgets and corporate communications can turn a forceful allegation into a provable chain of decisions.