What happened in this inspection
Cal/OSHA opened a planned inspection of Minnesota Mining & Manufacturing Company at 18750 Minnesota Road, Corona (Riverside County) on May 30, 2018. It was a complete inspection of the worksite focused on safety hazards. 57 employees were recorded at the site, with union representation. Inspectors issued 12 citations (1 serious) and proposed $33,050 in penalties; the current total is $18,450. 3 citations were contested before the Appeals Board. 1 citation was deleted on appeal and is not counted. The case closed on Aug 26, 2019. The employer has 9 other inspections on its California record.
Citations
Each citation names the rule, its classification and the penalty as proposed and as it stands now.
Issued Nov 20, 2018. Proposed $1,000, current $0. 1 workers exposed. Contested Jan 18, 2019, final order Jun 12, 2019. Abatement due Dec 6, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $300, current $300. 2 instances. 2 workers exposed. Abatement due Dec 4, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $300, current $300. 1 workers exposed. Abatement due Nov 29, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $450, current $450. 1 workers exposed. Abatement due Nov 29, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $450, current $450. 1 workers exposed. Abatement due Nov 29, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $450, current $450. 5 instances. 1 workers exposed. Abatement due Nov 29, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $200, current $200. 1 workers exposed. Abatement due Dec 11, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $200, current $200. 2 instances. 2 workers exposed. Abatement due Dec 4, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $450, current $450. 3 instances. 2 workers exposed. Abatement due Nov 30, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $450, current $450. 2 instances. 2 workers exposed. Abatement due Dec 4, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $14,400, current $14,400. 1 workers exposed. Contested Jan 18, 2019, final order Jun 12, 2019. Abatement due Dec 11, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $14,400, current $800. 1 workers exposed. Contested Jan 18, 2019, final order Jun 12, 2019. Abatement due Dec 11, 2018, completed. Read the rule.
Issued Nov 20, 2018. Proposed $2,000, current $0. 8 workers exposed. Contested Jan 18, 2019, final order Jun 12, 2019. Read the rule.
Your rights
If you worked at this site, the inspection file is a public record once the case closes; request it from the Cal/OSHA district office with activity number 343193363. A worker who reported the hazard, the injury or the inspection and was then fired, demoted or cut has a retaliation claim under Labor Code 6310, one year to file with the Labor Commissioner and longer to sue. Injuries themselves go through workers' compensation. Free, confidential review: (800) 371-3088.
Source: U.S. Department of Labor OSHA enforcement data, inspection 343193363, checked Nov 1, 2026. How to read a record. Back to the safety tracker.
About this data: Records come from the U.S. Department of Labor's OSHA enforcement datasets (inspection, violation, accident and accident injury tables), which carry Cal/OSHA's state-plan inspections alongside federal ones. We load every inspection of a California worksite opened since January 1, 2000 and refresh it weekly. Employer names, addresses and industry codes are as the inspecting office recorded them; similar names are grouped where they clearly refer to the same employer. A citation can be reduced, vacated or withdrawn on appeal, and an inspection can stay open for months, so a record can change. Penalties shown as "current" reflect the latest status in the federal file. This page is public information about the employer's regulatory record, not legal advice and not a statement that any person was harmed or any law broken beyond what the record states.