Episode 13: WOEMA vs Artificial Stone Slab Manufacturers
In Episode 13 of From Dust to Verdict, host James Nevin of Brayton Purcell LLP delivers a detailed and unflinching examination of the March 19, 2026 Cal/OSHA Standards Board hearing on artificial stone and silicosis. This episode captures a defining moment in the public record, where occupational medicine physicians, nurses, public health experts, and Cal/OSHA medical leadership presented testimony that overwhelmingly converged on one conclusion: artificial stone is a uniquely toxic product that cannot be fabricated safely by human beings, and prohibition of artificial stone containing more than 1% crystalline silica is the only measure that fully protects workers.
The hearing centered on a petition submitted by the Western Occupational and Environmental Medicine Association (WOEMA), which represents more than 600 occupational medicine physicians. WOEMA’s presentation summarized decades of peer‑reviewed global medical literature and real‑world health surveillance data examining artificial stone exposure. Crystalline silica artificial stone—also referred to as engineered, artificial or manufactured stone—is at least 90% crystalline silica, with nano‑sized silica particles and approximately 10% additional toxic metals, dyes, resins and glues known as volatile organic compounds (VOCs). These materials are released during routine fabrication activities such as cutting, grinding, polishing, and drilling.
Dr. Robert Blink, an occupational medicine physician and former Cal/OSHA Standards Board member, explained that artificial stone silica behaves differently from traditional silica exposures due to its ultra‑fine and nano‑sized particles. Testimony emphasized that these particles penetrate deep into the lungs, remain there permanently, and drive accelerated silicosis, a progressive and incurable disease. Speakers described how, despite increasingly stringent regulations, advanced engineering controls, wet methods, ventilation, and respiratory protection have not prevented ongoing disease. Public health data discussed at the hearing reflected hundreds of confirmed artificial stone–related silicosis cases in California alone, including numerous deaths and lung transplants, with additional cases emerging nationwide.
Nurses, worker advocates, and medical professionals echoed this conclusion, stating that reliance on compliance‑based controls has failed to stop the epidemic and that continued exposure predictably leads to disease. Several speakers highlighted that safer substitute countertop materials already exist and are in commercial use elsewhere, reinforcing the medical consensus that elimination of exposure—not further refinement of controls—is the only fully protective solution.
In sharp contrast, industry representatives and foreign slab manufacturers disputed this conclusion. Their testimony emphasized compliance, enforcement, and certification frameworks, asserting that artificial stone can be fabricated safely under existing or enhanced controls. Episode 13 documents this divide in detail, placing side by side the medical testimony grounded in diagnosis, surveillance, and peer‑reviewed science, and the industry position questioning whether prohibition is necessary.
Throughout the episode, James Nevin provides legal and factual context informed by Brayton Purcell LLP’s experience representing hundreds of artificial stone fabrication workers diagnosed with silicosis across the United States. Episode 13 captures a pivotal hearing where the medical record was clear and unified, while the policy response remained contested—illustrating why the debate over artificial stone continues to carry profound medical, legal, and human consequences.