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Establishment profile

UNIMIN CORPORATION

1300 CAMINO DIABLO ROAD, BYRON, CA, 94514
212322Industrial Sand Mining

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OSHA inspections
16
over 34 years
Violations
19
$3,355 in penalties
Penalties
$3,355
$177 avg
Violations across 2 federal agencies
Enforcement actions from multiple agencies may indicate systemic compliance issues across functions.

Summary

UNIMIN CORPORATION has accumulated 19 OSHA violations across 16 inspections over 34 years of recorded history, with $3,355 in total assessed penalties.

The establishment sits in the 96th percentile for violations within its industry-state peer group of 1,680 employers. Inspection frequency runs at the 95th percentile. The most recent enforcement activity was recorded 15 years ago.

Federal records were found in 2 of 15 sources. Sources without matching records returned empty for this establishment.

Agency coverage

UNIMIN CORPORATION appears in OSHA workplace safety and MSHA mine safety records only. No matching records were found in WHD wage enforcement, EPA environmental compliance, NLRB labor relations, OFLC visa and labor certification (historical), FMCSA motor carrier registration, SAM.gov federal debarment, CMS nursing home enforcement, UVA Corporate Prosecution Registry, CPSC product recalls, or NHTSA vehicle recalls.

OSHA workplace safety

Inspections
16
0.5 / yr · last 34 yrs
Violations
19
0.6 / yr
Penalties
$3,355
$177 avg / violation
Inspection trigger · planned
15 of 16
Inspection trigger · complaint
1 of 16

75% of inspections at this establishment produced violations,

Most-cited OSHA standards

Top OSHA standards cited at this employer, ranked by citation count. Standards (CFR sections) cluster citations into safety themes -- machine guarding, lockout-tagout, hazard communication, fall protection, process safety, etc. A concentration on one or two sections reveals a pattern that individual citations don’t. 19 distinct standards shown · 19 citations in this view · $3,355 in penalties.

CFR sectionCitationsInspectionsTotal penaltyFirst citedLast cited
3277 J0111$600Mar 2009Mar 2009
3234 E0611$335Jul 2006Jul 2006
3214 B11$310Aug 2008Aug 2008
29 CFR 2340.0017 A11$310Aug 2008Aug 2008
4851 D0211$300Feb 2011Feb 2011
6151 C0111$300Mar 2009Mar 2009
7016 I11$225Feb 2011Feb 2011
4851 G11$225Feb 2002Feb 2002
29 CFR 2340.002411$150Mar 2009Mar 2009
29 CFR 2473.0001 A11$150Mar 2009Mar 2009
330811$150Nov 1993Nov 1993
5194 F0411$100Sep 1994Sep 1994
3219 A11$100Sep 1994Sep 1994
3209 A11$100Sep 1994Sep 1994
3340 C03 A11Aug 2004Aug 2004
3241 A11May 2003May 2003
29 CFR 2340.002311May 1999May 1999
461 A11Jan 1996Jan 1996
3203 A11Mar 1992Mar 1992

Source: OSHA inspection citations (violation_detail). CFR section codes can be looked up at osha.gov/laws-regs for the formal standard text. Per-inspection detail and the specific violation descriptions are available by expanding individual inspections below.

Peer comparison

96th

Worse on violations than nearly every other employer in NAICS 2123 within CA. Peer group: 1,680 employers. This establishment has 19 OSHA violations; peer median is 2.

Fewer violationsMore violations
Penalty percentile
84th
peer median: $300
Inspection frequency
95th
peer median: 2

Safety self-report (OSHA 300A)

No self-reported injury rates filed with OSHA's Injury Tracking Application for UNIMIN CORPORATION. Verify directly with OSHA Injury Tracking Application

Industry benchmark

Industry avg TRIR
1.5
BLS SOII 2024
Industry avg DART
1.0
BLS SOII 2024
Self-reported TRIR
Not in OSHA ITA

BLS rates reflect industry-wide averages. Self-reported figures come from OSHA’s Injury Tracking Application; absence of self-reported data does not necessarily indicate non-compliance — many establishments fall below the ITA reporting threshold.

Inspection breakdown

Planned
15
Complaint
1

Complaint- and accident-triggered inspections are stronger risk signals than routine planned inspections.

OSHA severe injury reports

No severe injury reports (hospitalization, amputation, or loss of an eye) on file under 29 CFR 1904.39 for UNIMIN CORPORATION. Verify directly with Occupational Safety and Health Administration

Activity timeline

Data refreshed
Weekly
First OSHA inspection
Most recent activity
15 years ago

No federal enforcement activity has been recorded against this establishment in 15+ years. Most recent activity: 15 years ago. Data on this page is refreshed weekly.

Wage & Hour Division (WHD)

No WHD wage, overtime, or child-labor enforcement cases on file for UNIMIN CORPORATION. Verify directly with Wage and Hour Division

Mine safety (MSHA)

Company-level in CA — for UNIMIN CORPORATION, not this location alone

Violations
221
Assessed penalties
$52,257

Mine Safety & Health Administration — citations issued at mining operations. MSHA records cases at the company/regional level (no worksite address), so these are matched by company name and state and may span other UNIMIN CORPORATION operations in the same state.

MSHA citations

Mine Safety and Health Administration citations. S&S (significant and substantial) marks violations that could reasonably contribute to a serious injury. Negligence rating is MSHA’s operator-culpability assessment (none, low, moderate, high, or reckless disregard). Proposed = assessed at issuance; Paid = post-settlement / appeal. 100 citations · 37S&S · 100 contractor · $43,927 proposed / $39,837 paid.

CitationMineDateSectionS&SNegligenceProposedPaid
8568811
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011YesModNegligence$6,996$6,996
8568855
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoModNegligence$2,678$601
8698921
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2013YesModNegligence$1,530$1,530
8609491
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Sep 2011NoModNegligence$1,412$1,412
8609490
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Sep 2011NoModNegligence$1,412$1,412
7958840
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2007YesModNegligence$1,412$1,412
8613396
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012YesModNegligence$1,203$1,203
6370130
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009YesLowNegligence$1,203$650
8609488
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2011NoModNegligence$946$946
8568815
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011NoModNegligence$946$946
8613393
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012NoHighNegligence$873$873
8609977
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2012NoModNegligence$873$873
6370128
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009NoModNegligence$873$873
6370129
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009NoModNegligence$807$500
7958838
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2007YesModNegligence$634$634
8613390
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2012NoHighNegligence$585$585
8568814
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011NoModNegligence$585$585
8568813
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011NoModNegligence$585$585
6489384
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2010YesModNegligence$585$585
8568856
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoModNegligence$540$540
6443337
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jun 2009NoModNegligence$540
6443336
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jun 2009NoLowNegligence$540$540
6353990
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jan 2008YesModNegligence$540$540
8568816
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011NoModNegligence$460$460
8609489
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2011NoLowNegligence$425$425
8613391
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012NoModNegligence$392$392
8609976
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2012NoModNegligence$392$392
8696073
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2013NoModNegligence$362$362
8568861
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoLowNegligence$362$181
6345700
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Apr 2003YesModNegligence$317$317
8698922
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2013NoModNegligence$308$308
6443301
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jan 2009NoModNegligence$308$308
6393392
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2007YesModNegligence$286$286
8568812
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011NoModNegligence$285$285
8568810
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2011NoModNegligence$285$285
7958839
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2007NoModNegligence$285$285
7958837
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2007NoModNegligence$285$285
7958836
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2007NoModNegligence$285$285
8613392
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012NoModNegligence$263$263
8613389
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2012NoModNegligence$263$263
8613388
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2012NoModNegligence$263$263
8613387
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2012NoModNegligence$263$263
8613386
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2012NoModNegligence$263$263
6489394
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2010YesModNegligence$263$263
6489386
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2010YesModNegligence$263$263
6370127
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009NoModNegligence$263$100
6370126
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009NoModNegligence$263$263
6370125
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009NoModNegligence$263$263
6370122
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2009NoModNegligence$263$100
8613395
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012NoModNegligence$243$243
6379220
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2005YesModNegligence$217$217
6370677
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Dec 2004YesModNegligence$217$217
7996125
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Apr 2001YesHighNegligence$207$207
6387794
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jul 2006YesModNegligence$191$191
7996132
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Apr 2001YesModNegligence$184$184
7996128
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Apr 2001YesModNegligence$184$184
7996122
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Apr 2001YesModNegligence$184$184
7992487
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Dec 2000YesModNegligence$184$184
8696085
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2013NoModNegligence$176$176
8562090
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Oct 2010YesModNegligence$176$176
6489393
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2010YesModNegligence$176$176
6489385
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2010YesModNegligence$176$176
6489299
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Dec 2009YesModNegligence$176$176
6489250
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Oct 2009YesModNegligence$176$176
6356831
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Oct 2003YesModNegligence$164$164
6356830
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Oct 2003YesModNegligence$164$164
8696070
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2013NoModNegligence$162$162
8696069
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2013NoModNegligence$162$162
8613398
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012NoModNegligence$162$162
8613397
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Aug 2012NoModNegligence$162$162
8568858
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoModNegligence$162$162
8568857
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoModNegligence$162$162
6353993
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jan 2008YesModNegligence$162$162
6432028
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Sep 2007YesModNegligence$162$162
7987084
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jul 2000NoModNegligence$161$55
6432320
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jan 2008NoModNegligence$150$150
6432319
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jan 2008NoModNegligence$150$150
7996126
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Apr 2001YesModNegligence$150$150
7992484
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Dec 2000YesModNegligence$150$150
7992483
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Dec 2000YesModNegligence$150$150
6387248
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jun 2006YesModNegligence$144$144
6387245
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jun 2006YesModNegligence$144$144
6443300
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Jan 2009NoModNegligence$138$138
7992465
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Dec 2000YesLowNegligence$131$131
6532414
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Mar 2009NoModNegligence$127$127
6387128
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Nov 2005YesModNegligence$124$124
8562089
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Oct 2010NoModNegligence$117$117
8562088
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Oct 2010NoModNegligence$117$117
8562085
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Oct 2010NoModNegligence$117$117
6432318
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jan 2008NoModNegligence$117$117
7992470
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Dec 2000YesModNegligence$113$113
8568860
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoModNegligence$108$108
8698920
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2013NoModNegligence$100$100
8698919
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2013NoModNegligence$100$100
8698918
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2013NoLowNegligence$100$100
8698917
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
May 2013NoModNegligence$100$100
8696071
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Feb 2013NoLowNegligence$100$100
8696074
USMC Ione Plant
Amador, CA
contractor: Unimin Corp
Jan 2013NoModNegligence$100$100
8568859
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Apr 2011NoModNegligence$100$100
8562087
G3 Enterprises Byron Plant
Contra Costa, CA
contractor: Unimin Corporation
Oct 2010NoModNegligence$100$100

Source: MSHA citation database. “Contractor” annotations indicate the cited party was on-site at the mine but not the mine’s operator -- responsibility attaches to the contractor LLC, not the mine’s owner. Section codes reference 30 CFR (the Mine Safety and Health regulations).

Labor relations (NLRB)

No NLRB unfair labor practice charges or union representation cases on file for UNIMIN CORPORATION. Verify directly with National Labor Relations Board

Visa & labor certification (OFLC) — historical

No H-1B, H-2A, or H-2B labor condition applications on file (historical data only — DOL ended OFLC publication) for UNIMIN CORPORATION. Verify directly with Office of Foreign Labor Certification

Environmental compliance (EPA)

No EPA inspections or formal enforcement actions on file for UNIMIN CORPORATION. Verify directly with Environmental Protection Agency

EPA-registered facilities

Every EPA ECHO facility associated with this employer, sorted most-significant first. Each row links to EPA’s Detailed Facility Report for the source-of-truth record. Permits column lists active programs (Air = Clean Air Act, Water = Clean Water Act, RCRA = hazardous waste, TRI = Toxics Release Inventory reporting). 1 facility.

FacilityPermitsStatusInspectionsFormal actionsPenaltiesLast inspectedECHO
UNIMIN CORPORATION
100 CAMINO DIABLO ROAD · BYRON, CA, 94514
WaterNo Violation Identified00Mar 2019View →

Source: EPA ECHO (Enforcement and Compliance History Online). Compliance status follows EPA’s own labels (“Sig Violation” = significant noncompliance; QNCR = quarters of noncompliance over the recent reporting window). Inactive facilities (struck through) retain historical enforcement records even after operations ceased.

Federal criminal prosecution record

No federal criminal prosecutions, plea agreements, or deferred-prosecution agreements on file for UNIMIN CORPORATION. Verify directly with UVA Corporate Prosecution Registry

Inspection history

DateTriggerViolationsSeriousPenalty
2011-02-03Planned2$525
2009-02-09Planned4$1,200
2008-07-16Planned2$620
2007-07-11Planned0$0
2006-07-11Planned1$335
2005-10-04Planned0$0
2004-07-29Planned1$0
2003-05-07Planned1$0
2002-01-11Planned1$225
1999-04-20Planned1$0
1998-08-31Planned0$0
1997-12-31Planned0$0
1996-01-11Planned1$0
1994-09-08Planned3$300
1993-09-28Complaint1$150
1992-02-21Planned1$0

Source: OSHA IMIS. Citation amounts reflect initially assessed penalties; final amounts after appeal may differ.

In the news

Other employers in this industry and state

Other employers in industrial sand mining within CA, ordered by federal enforcement volume:

Related searches

About this data

This profile aggregates federal enforcement records on UNIMIN CORPORATION from every major federal compliance and enforcement source plus the UVA Corporate Prosecution Registry. OSHA workplace safety inspections, WHD wage cases, MSHA mine safety, EPA environmental enforcement, NLRB labor relations, OFLC visa/labor certification, FMCSA motor carrier registration, SAM.gov debarments, CMS nursing-home records, BLS industry safety benchmarks, OSHA ITA self-reported injury rates, SEC enforcement and financial disclosures, CPSC and NHTSA recalls.

Establishments are matched across agencies using normalized employer name, state, and ZIP code.

OSHA citations typically appear 3–8 months after the inspection, so very recent enforcement actions may not yet be reflected. Profiles may be incomplete if the establishment operates under multiple legal names or files under variations our entity-matching rules don’t yet cover. To report a missing record or correction, email corrections@fastdol.com.

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Frequently asked

What is UNIMIN CORPORATION's OSHA violation history?
UNIMIN CORPORATION has 16 OSHA inspections on record with 19 violations and $3,355 in total penalties.
How does UNIMIN CORPORATION's safety record compare to its industry?
UNIMIN CORPORATION operates in the industrial sand mining industry. The industry average Total Recordable Incident Rate (TRIR) is 1.5.