Shamrock Materials Inc safety record at a glance
Shamrock Materials Inc has been the subject of 11 Cal/OSHA inspections in California since 2000, opened between Apr 27, 2000 and Jun 23, 2010. 6 of them were planned inspections. 8 of them produced citations, 17 in all: 2 serious. Inspectors proposed $17,000 in penalties; after appeals and settlements the current total is $6,865. The largest single penalty, $3,420, came from an inspection opened May 21, 2003 in Santa Rosa. That places the employer at #19,464 of 122,853 California employers in the database by penalties.
Industry as coded by the inspecting office: Manufacturing; Construction; Mining, Quarrying, and Oil and Gas Extraction. Worksites in San Rafael, Napa, Cloverdale, Santa Rosa.
Every inspection, newest first
Click a date for the citations in that inspection.
| Opened | City | Why | Result | Penalty | Closed |
|---|---|---|---|---|---|
| Jun 23, 2010 | San Rafael | Accident | no citations | $0 | Nov 14, 2011 |
| Jul 16, 2008 | San Rafael | Accident | 3 citations | $1,125 | Jan 29, 2009 |
| Jun 14, 2007 | San Rafael | Accident | 2 citations | $560 $1,120 proposed | Apr 18, 2008 |
| Jun 6, 2007 | Napa | Complaint | no citations | $0 | Aug 10, 2007 |
| May 24, 2006 | Cloverdale | Planned | 2 citations | $560 | Aug 30, 2006 |
| Apr 19, 2006 | Cloverdale | Planned | no citations | $0 | May 19, 2006 |
| Aug 12, 2003 | San Rafael | Complaint | 1 citation | $300 $5,000 proposed | Apr 24, 2006 |
| May 21, 2003 | Santa Rosa | Planned | 4 citations 2 serious | $3,420 | Aug 2, 2006 |
| Jul 5, 2001 | Cloverdale | Planned | 2 citations | $150 | Nov 21, 2001 |
| May 3, 2000 | Cloverdale | Planned | 2 citations | $150 $225 proposed | Apr 23, 2001 |
| Apr 27, 2000 | San Rafael | Planned | 1 citation | $600 $5,400 proposed | Feb 15, 2001 |
Also recorded as: Shamrock Materials; Shamrock Materials, Inc.
The rules this employer was cited under
- 8 CCR 3328, Machinery and equipment, general: 4 citations, $975
- 8 CCR 3661, Brakes and Warning Devices: 2 citations, $300
- 8 CCR 3999, Hand tools: 1 citation, 1 serious, $2,700
- 8 CCR 1592, Warning methods, construction: 1 citation, $600
- 8 CCR 3314, Lockout and cleaning of machinery: 1 citation, $560
- 8 CCR 3203, Injury and Illness Prevention Program: 1 citation, $375
- 8 CCR 7014, Private Roads: 1 citation, $335
- 8 CCR 342, Reporting serious injuries and deaths: 1 citation, $300
Accidents investigated
How to read this record
Each row is one inspection by Cal/OSHA (or, rarely, federal OSHA) of one worksite. Why is the reason it was opened. Penalty is the current figure after any appeal or settlement; where it was reduced, the amount the inspector first proposed is shown under it. "Serious" means a realistic possibility of death or serious harm; "willful" and "repeat" carry penalties up to $162,851 each.
Citations document that the employer was told, in writing, what the rule required and when. That knowledge is often the center of a retaliation case: a worker who complained about the hazard an inspector later cited, and was then fired or cut, has a Labor Code 6310 claim, with lost wages and attorney's fees.
Full explainer: how to read a Cal/OSHA record.
If you work, or worked, at Shamrock Materials Inc
Write down what you reported, to whom and when, and what changed afterward: shifts, pay, duties, write-ups. Request the inspection file from the Cal/OSHA district office using the activity number on the inspection page. An injury goes through workers' compensation; a firing, demotion or threat after a safety complaint or injury report is an employment claim with a one-year deadline at the Labor Commissioner (Labor Code 6310) and a longer one in court. Free, confidential review: (800) 371-3088 or send what you have.
Source: U.S. Department of Labor OSHA enforcement data, California inspections. Record last checked Nov 4, 2026. 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.