California Stone Fabricators Throughout the State: July 1 Training Attestation Deadline Is This Week

July 1 is the deadline. Under California's Silicosis Training, Outreach, and Prevention (STOP) Act — Senate Bill 20, signed into law October 2025 — every stone fabrication shop owner whose workers perform high-exposure trigger tasks must electronically submit a written training attestation to Cal/OSHA by that date, and annually after that.

The requirement sits at the center of what is California's most significant occupational safety rulemaking in the stone fabrication sector in decades. Engineered stone, now the dominant countertop material in many markets, contains up to 95% crystalline silica — roughly three times the concentration found in natural granite.

Workers who cut, grind, or polish it without adequate controls develop accelerated silicosis, a progressive and irreversible lung disease. California's silicosis dashboard has recorded more than 560 confirmed cases over seven years. The median age at death among affected workers is 46.

Filing the attestation is not the same thing as completing the training. SB 20 requires that every employee performing high-exposure tasks has already received formal silica safety instruction — covering health hazards, wet-cutting controls, respirator requirements, and proper housekeeping — before the employer signs off. What follows is a breakdown of who must file, what that training must include, and what Cal/OSHA can do if July 1 passes without a submission on record.

The attestation requirement applies universally to all owners and operators of stone slab fabrication shops, as well as any business or individual that employs workers to perform "high-exposure trigger tasks"³. These trigger tasks encompass a broad range of activities, including machining, crushing, cutting, drilling, abrading, grinding, chiseling, polishing, or cleaning up the dust and debris associated with these operations².

The regulations explicitly target any operations involving artificial stone containing more than 0.1% crystalline silica, as well as natural stone materials containing more than 10% crystalline silica².

Employers cannot simply submit the attestation document; they must first ensure that a comprehensive safety training curriculum has been successfully delivered to all affected employees¹.

Training must be accessible, provided in a language the employees fully understand, and comprehensively address the safety topics mandated by Title 8, Section 5204 of the California Code of Regulations¹. The curriculum requires detailed instruction on several core operational and health areas to ensure workers recognize both the invisible hazards of the dust and the engineering controls required to mitigate them.

In practical regulatory terms, an attestation is a formal, legally binding declaration submitted to the state¹. It requires the employer to officially sign off—confirming that the mandated silica safety training was fully delivered to, and comprehended by, every single employee engaged in high-exposure tasks¹.

This mechanism fundamentally shifts the burden of proof entirely onto the employer. It is not merely an internal record-keeping exercise; it actively certifies to Cal/OSHA that the fabrication shop is operating in full compliance with the STOP Act's educational requirements¹. Submitting false attestations is explicitly unlawful and exposes the business to severe civil penalties and heightened legal liability³.

Impacted employers are required to submit the written attestation electronically directly to Cal/OSHA¹. State agencies, including the Department of Industrial Relations (DIR), the California Department of Public Health (CDPH), and Cal/OSHA, are currently finalizing the exact electronic portal infrastructure and the formal state-approved training curriculum².

Once operational, these electronic submissions will be managed by the Enforcement Statistics and Information Management Unit (ESIMU), a specialized division responsible for logging attestation records, tracking compliance deadlines, and immediately routing missing documentation alerts to district enforcement offices²¹.

Employers must closely monitor communications from the DIR to access the finalized electronic filing system and ensure their paperwork is successfully transmitted ahead of the July 1 deadline².

Penalties for Missing the July 1 Attestation Deadline..see the whole article here: