UNIMIN CORPORATION
1300 CAMINO DIABLO ROAD, BYRON, CA 94514 · NAICS 212322 Industrial Sand Mining
Having inspection records is common for businesses in regulated industries. Data and methodology
Inspection records
Aug 31, 1998#125869479Aug 31, 1998Planned (H) · Partial scope, Safety#125869479$00 viol.0 violations$0 in penalties
Inspection #125869479
Dates
- Opened
- Aug 31, 1998
- Closing Conference Date
- Aug 31, 1998
- Closed
- Sep 9, 1998
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 28
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 100 Camino Diablo Road, Byron, CA 94514
- Industry
- 212322 Industrial Sand Mining
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Dec 31, 1997#125656728Dec 31, 1997Planned (H) · Complete scope, Safety#125656728$00 viol.0 violations$0 in penalties
Inspection #125656728
Dates
- Opened
- Dec 31, 1997
- Closing Conference Date
- Jan 2, 1998
- Closed
- Jan 8, 1998
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 35
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 1300 Camino Diablo Road, Byron, CA 94514
- Industry
- 212322 Industrial Sand Mining
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Jan 11, 1996#119772036Jan 11, 1996Planned (H) · Complete scope, Safety#119772036$01 viol.1 violation$0 in penalties
Inspection #119772036
Dates
- Opened
- Jan 11, 1996
- Closing Conference Date
- Jan 11, 1996
- Closed
- Apr 2, 1996
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 34
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 100 Camino Diablo Road, Byron, CA 94514
- Industry
- 212322 Industrial Sand Mining
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 461 Permits to Operate OSHA citation code: 461 A | Other | 1 | 1 | $0 | $0 | Mar 19, 1996 | - | - |
Sep 8, 1994#120186473Sep 8, 1994Planned (H) · Complete scope, Safety#120186473$3003 viol.3 violations$300 in penalties
Inspection #120186473
Dates
- Opened
- Sep 8, 1994
- Closing Conference Date
- Sep 12, 1994
- Closed
- Oct 17, 1995
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 35
Violations and Penalties
- Total Violations
- 3
- Violation Types
- 3 other-than-serious
- Initial Penalties
- $300
- Penalties on Record
- $300
- Site Address
- 1300 Camino Diablo Road, Byron, CA 94514
- Industry
- 212322 Industrial Sand Mining
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (3 of 3 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 5194 Hazard Communication OSHA citation code: 5194 F04 | Other | 1 | 1 | $100 | $100 | Sep 8, 1994 | - | - |
| 01002 | 3219 Maintenance of Fire Protection Equipment, Materials and Assemblies OSHA citation code: 3219 A | Other | 1 | 1 | $100 | $100 | Sep 8, 1994 | - | - |
| 01003 | 3209 Standard Guardrails OSHA citation code: 3209 A | Other | 1 | 1 | $100 | $100 | Sep 8, 1994 | - | - |
Sep 28, 1993#120183728Sep 28, 1993Complaint (B) · Complete scope, Safety#120183728$1501 viol.1 violation$150 in penalties
Inspection #120183728
Dates
- Opened
- Sep 28, 1993
- Closing Conference Date
- Sep 30, 1993
- Closed
- May 6, 1996
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- Yes
- Number of Employees
- 35
- Related Activity
- 1 complaint
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $150
- Penalties on Record
- $150
- Site Address
- 1300 Camino Diablo Road, Byron, CA 94514
- Industry
- 212322 Industrial Sand Mining
Complaint Inspection: This inspection record is categorized as a complaint inspection in the DOL OSHA enforcement data. OSHA can open complaint-driven inspections after receiving safety or health complaints from workers or their representatives.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3308 Hot Pipes and Hot Surfaces | Other | 2 | 1 | $150 | $150 | Dec 1, 1993 | - | - |
Feb 21, 1992#112095419Feb 21, 1992Planned (H) · Complete scope, Safety#112095419$01 viol.1 violation$0 in penalties
Inspection #112095419
Dates
- Opened
- Feb 21, 1992
- Closing Conference Date
- Feb 21, 1992
- Closed
- May 29, 1992
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 35
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 1300 Camino Diablo Road, Byron, CA 94514
- Industry
- 212322 Industrial Sand Mining
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 A | Other | 1 | 35 | $0 | $0 | Apr 16, 1992 | - | - |
Penalty amounts may differ from final amounts after settlement or judicial review. How to read these records
About these records
A company page groups inspections with the same normalized employer name, city and state; it is not a legal-entity identifier (how pages are grouped).
This page displays public OSHA enforcement data. Status text follows the DOL inspection record first and may include citation-level context when the inspection feed and citation records are out of sync. Penalty amounts shown reflect the latest penalty amounts on record in the DOL database and may differ from initial assessments or final amounts. This is not an official OSHA resource.
OSHA's public enforcement data does not publish a "guilty" or "not guilty" field for inspections. The closest outcome fields available are the citation counts, penalty amounts, contest dates, final-order dates, and the inspection close date shown on this page. How to interpret these status fields. How initial and current penalties are recorded.
OSHA may publish multiple citation rows in the same inspection with the same standard and penalty fields. Separate rows can still differ in OSHA metadata such as citation identifier, recorded instance count, exposed workers, or gravity value. Contest and Final Order columns show citation-level dates from OSHA's enforcement record. A dash means OSHA's record does not currently show that activity for the citation.
Understanding These Penalties
The maximum penalty for a serious violation in 2025 is $16,550 per violation. For willful violations, the range is $11,823 to $165,514. The current penalty column shows the latest amount on record in OSHA's database for each citation. When the current penalty differs from the initial penalty, OSHA's records show that the amount changed during the enforcement process, but this page does not determine the specific reason for each change. Penalty amounts are set by OSHA and adjusted annually for inflation.
16 inspections, 1992 to 2011. Each row is one inspection; point at or tap a row for its dates and totals.
Source: DOL OSHA enforcement data (inspections and violations), linked via activity_nr (exact government key).
Penalty changes: Amounts shown reflect what OSHA's enforcement record publishes. The reason for any change is not stated unless OSHA's record explicitly says so.
Short cases: When a case closed soon after it opened, the closed marker is drawn slightly to the right so both markers stay visible. Each row's card shows the exact dates.
Standards cited
Industry comparison
Mining (except Oil and Gas), 2,260 employers with OSHA inspections. Arithmetic from DOL records.