Asbestos Exposure at Mexico 59 — Mexico: Former Worker Claims

Who May Have Been Exposed at Mexico 59 Mexico Missouri

Occupational asbestos exposure at Mexico 59 school buildings was not random. Specific trades, working in specific locations during specific tasks, are alleged to have faced documented risk of inhaling asbestos fibers. The workers described below are alleged to have experienced elevated airborne fiber concentrations based on the materials reportedly present and the nature of their work.

Boilermakers — Boilermakers Local 27

Workers who serviced and repaired pressure vessels in Mexico 59 boiler rooms reportedly encountered equipment including:

• American Radiator cast-iron hot-water systems
• AO Smith fire-tube boilers
• Brunner equipment
• Burnham heating systems

These units were located in boiler rooms, equipment rooms, gymnasium mechanical spaces, and paint booth areas.

Boilermakers affiliated with Boilermakers Local 27 are alleged to have worked directly with asbestos-containing rope gaskets — reportedly including Cranite-brand high-temperature gaskets** — block insulation, and boiler cement during maintenance and repair, often in confined spaces where fiber concentrations were reportedly highest. Workers who performed valve work, flange disconnections, or boiler tube cleaning are alleged to have disturbed asbestos-containing gasket materials and insulation during routine service calls and emergency repairs alike.

Pipefitters — UA Local 562 and Heat and Frost Insulators Local 1

Workers who maintained steam and hot-water distribution systems through Mexico 59’s mechanical spaces and building corridors are reported to have encountered extensive pipe insulation throughout these facilities — including products from (calcium silicate pipe insulation and Thermobestos brands)** and (high-temperature pipe insulation brand)**, as documented in MDNR records.

Pipefitters affiliated with Plumbers and Pipefitters UA Local 562 and insulators affiliated with Heat and Frost Insulators Local 1 (St. Louis) are alleged to have disturbed aged pipe lagging during routine repairs, replacements, and seasonal shutdowns — generating elevated airborne fiber concentrations in enclosed mechanical chases and boiler rooms. Workers who removed, cut, or refitted insulation on high-temperature lines are alleged to have faced repeated occupational exposure to friable asbestos fibers during the course of ordinary maintenance work.

Insulators — Heat and Frost Insulators Local 1

Insulators who applied, repaired, or removed block insulation and pipe covering from Mexico 59 heating systems are alleged to have worked in sustained direct contact with friable thermal system insulation (TSI) products. When aged insulation manufactured by , and other TSI suppliers** was disturbed, respirable fibers are alleged to have been released into enclosed spaces at concentrations exceeding safe exposure limits. Workers who removed calcium silicate pipe insulation, Thermobestos, or high-temperature pipe insulation pipe coverings during renovation or seasonal maintenance are alleged to have experienced high-intensity, acute exposure events that accumulated over years of district employment.

HVAC Mechanics

Workers who serviced air handling equipment and duct systems at Mexico 59 buildings are reported to have encountered friable duct wrap throughout these facilities. Duct insulation manufactured by and ceiling tile** was standard in institutional HVAC systems of this era.

Workers who disturbed, cut, or removed aged duct insulation — reportedly including pipe insulation brand duct wrap — are alleged to have released fibers directly into return air systems and surrounding work areas. Maintenance on aging air handlers, ductwork repairs, and replacement of worn insulation are alleged to have exposed HVAC mechanics to asbestos dust throughout the operational life of these systems.

Electricians, Millwrights, and In-House Maintenance Workers

General trades who performed routine repairs, renovations, boiler outages, and facility maintenance are alleged to have disturbed aged insulation — often without respiratory protection, particularly before the 1980s, when manufacturers, and concealed or downplayed known asbestos hazards. Workers who performed electrical work in mechanical spaces containing friable spray-applied fireproofing spray-applied fireproofing or aged Transite cement-asbestos board duct liners are alleged to have breathed respirable fibers while drilling, cutting, or working in close proximity to ACM.

Family Members — Secondary (Take-Home) Exposure

Spouses and children of tradesmen are documented to have experienced secondary exposure when workers returned home with asbestos fibers embedded in work clothing, hair, and tools. Take-home contamination is a recognized theory of recovery in mesothelioma litigation and may support claims by family members who develop asbestos-related disease after prolonged household contact with workers employed at Mexico 59 facilities.