Bay Area/ San Francisco

Vallejo's Crown Hill Materials Hit with Notice of Violation for Unpermitted Concrete Plant Operations

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Published on August 18, 2025
Vallejo's Crown Hill Materials Hit with Notice of Violation for Unpermitted Concrete Plant OperationsSource: Google Street View

Vallejo's Crown Hill Materials has been slapped with a Notice of Violation by the Bay Area Air District for running an unpermitted concrete batch plant, following concerns flagged by locals. Alongside the Notice of Violation, the company received a firm cease-and-desist letter today, pressing for an immediate halt to the plant’s operations. According to Bay Area Air District officials, enforcement and possible legal actions loom if the batch plant remains active without proper authorization.

Inspectors moved in on Crown Hill Materials after a local raised the alarm about the facility's compliance with air quality protocols. Their investigation uncovered that indeed the larger batch plant was out of line with regional environmental protections, despite the facility boasting a second, smaller batch plant, which, due to its size, bypasses the need for a permit. The facility flaunting its operations in the face of regulatory standards poses a palpable health threat. Dr. Philip Fine, executive officer of the Air District, emphasized the violation’s severity in a statement: "Operating equipment without a required permit is a serious violation that puts public health at risk and undermines the safeguards we have in place to protect overburdened communities."

Community advocate Ed Kelly, who resides near the plant, vocalized his approval of the Air District’s measures, noting an enduring effort from the neighborhood to cast light on the industrial undertakings. "This action is an important step forward for our community," Kelly expressed, affirming the resolve of residents to witness their area shielded from environmental hazards.

Joining the fray, the City of Vallejo is collaborating with the Air District to enforce compliance. They aim not only to halt the unpermitted plant's functions but also to impose monetary repercussions on Crown Hill Materials for the breach in regulatory conduct. The community is encouraged to remain alert and report any air quality issues, utilizing the Air District’s accessible channels, like their 24-hour hotline and a dedicated online platform for lodging complaints.