THERMAL STRUCTURES INC
2362 RAILROAD ST, CORONA, CA 91720 · NAICS 327993 Mineral Wool Manufacturing
Having inspection records is common for businesses in regulated industries. Data and methodology
Inspection records
Aug 6, 2018#343360483Aug 6, 2018Accident (A) · Partial scope, Safety#343360483$5,8502 viol.2 violations$5,850 in penalties
Inspection #343360483
Dates
- Opened
- Aug 6, 2018
- Closing Conference Date
- Jan 24, 2019
- Contested
- Mar 6, 2019
- Final Order
- Aug 15, 2019
- Closed
- Oct 3, 2019
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 297
- Related Activity
- 1 accident
Violations and Penalties
- Total Violations
- 2
- Violation Types
- 1 serious, 1 other-than-serious
- Initial Penalties
- $24,750
- Penalties on Record
- $5,850
- Site Address
- 2380 Railroad St, Corona, CA 92880
- Industry
- 336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Incident Investigation Summaries
Incident investigation summaries linked to this inspection through OSHA's accident and injury enforcement data. These summaries describe the reported incident. The enforcement outcome for the linked inspection is in the inspection details above.
Employee is struck by falling mold and fractures wrist
Violations
Violation list (2 of 2 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203(A) Injury and Illness Prevention Program | Other | 4 | 20 | $6,750 | $450 | Feb 7, 2019 | Mar 6, 2019 | Aug 15, 2019 |
| 02001 | 3704 Securing Loads | Serious | 1 | 1 | $18,000 | $5,400 | Feb 7, 2019 | Mar 6, 2019 | Aug 15, 2019 |
Apr 24, 2012#316207182Apr 24, 2012Accident (A) · Partial scope, Safety#316207182$7,4252 viol.2 violations$7,425 in penalties
Inspection #316207182
Dates
- Opened
- Apr 24, 2012
- Closing Conference Date
- Sep 20, 2012
- Contested
- Sep 28, 2012
- Final Order
- May 30, 2013
- Closed
- Nov 22, 2013
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 460
- Related Activity
- 1 accident
Violations and Penalties
- Total Violations
- 2
- Violation Types
- 2 serious
- Initial Penalties
- $24,750
- Penalties on Record
- $7,425
- Site Address
- 2362 Railroad St, Corona, CA 92880
- Industry
- 336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Incident Investigation Summaries
Incident investigation summaries linked to this inspection through OSHA's accident and injury enforcement data. These summaries describe the reported incident. The enforcement outcome for the linked inspection is in the inspection details above.
Employee amputates finger in pneumatic punch press
Violations
Violation list (2 of 2 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 4203 Training OSHA citation code: 4203 B | Serious | 1 | 1 | $6,750 | $675 | Oct 4, 2012 | Sep 28, 2012 | May 30, 2013 |
| 02001 | 4206 Safeguarding the Point of Operation OSHA citation code: 4206 A | Serious | 1 | 1 | $18,000 | $6,750 | Oct 4, 2012 | Sep 28, 2012 | May 30, 2013 |
May 18, 2010#313508624May 18, 2010Accident (A) · Partial scope, Safety#313508624$9002 viol.2 violations$900 in penalties
Inspection #313508624
Dates
- Opened
- May 18, 2010
- Closing Conference Date
- Oct 14, 2010
- Contested
- Oct 28, 2010
- Final Order
- Feb 25, 2011
- Closed
- Feb 15, 2012
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 370
- Related Activity
- 1 accident
Violations and Penalties
- Total Violations
- 2
- Violation Types
- 2 other-than-serious
- Initial Penalties
- $4,125
- Penalties on Record
- $900
- Site Address
- 2362 Railroad St, Corona, CA 92880
- Industry
- 336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Incident Investigation Summaries
Incident investigation summaries linked to this inspection through OSHA's accident and injury enforcement data. These summaries describe the reported incident. The enforcement outcome for the linked inspection is in the inspection details above.
Employee gets hand caught in machine
Violations
Violation list (2 of 2 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3314 The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including Lockout/Tagout OSHA citation code: 3314 C | Other | 1 | 1 | $750 | $450 | Oct 28, 2010 | Oct 28, 2010 | Feb 25, 2011 |
| 02001 | 3942 Type of Guarding Required OSHA citation code: 3942 A | Other | 1 | 2 | $3,375 | $450 | Oct 19, 2010 | Oct 28, 2010 | Feb 25, 2011 |
Feb 14, 2008#310601786Feb 14, 2008Accident (A) · Partial scope, Safety#310601786$1,7504 viol.4 violations$1,750 in penalties
Inspection #310601786
Dates
- Opened
- Feb 14, 2008
- Closing Conference Date
- Apr 9, 2008
- Contested
- Apr 22, 2008
- Final Order
- Aug 22, 2008
- Closed
- Mar 23, 2010
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 115
- Related Activity
- 1 accident
Violations and Penalties
- Total Violations
- 4
- Violation Types
- 4 other-than-serious
- Initial Penalties
- $13,250
- Penalties on Record
- $1,750
- Site Address
- 2380 Railroad St Ste 102, Corona, CA 92880
- Industry
- 336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Incident Investigation Summaries
Incident investigation summaries linked to this inspection through OSHA's accident and injury enforcement data. These summaries describe the reported incident. The enforcement outcome for the linked inspection is in the inspection details above.
Employee amputates fingers while using press
Violations
Violation list (4 of 4 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 342 Reporting Work-Connected Fatalities and Serious Injuries OSHA citation code: 342 A | Other | 1 | - | $5,000 | $1,000 | Apr 14, 2008 | Apr 22, 2008 | Aug 21, 2008 |
| 01002 | 4208 Point of Operation Devices OSHA citation code: 4208 A05 | Other | 1 | 1 | $750 | $0 | May 12, 2008 | Apr 22, 2008 | Aug 22, 2008 |
| 01003 | 4208 Point of Operation Devices OSHA citation code: 4208 C05 | Other | 1 | 1 | $750 | $0 | May 12, 2008 | Apr 22, 2008 | Aug 21, 2008 |
| 02001 | 4193 Machines Using Part Revolution Clutches OSHA citation code: 4193 E01 | Other | 1 | 1 | $6,750 | $750 | Apr 14, 2008 | Apr 22, 2008 | Aug 21, 2008 |
Sep 24, 1997#125974303Sep 24, 1997Programmed Related (I) · Complete scope, Safety#125974303$5,09010 viol.10 violations$5,090 in penalties
Inspection #125974303
Dates
- Opened
- Sep 24, 1997
- Closing Conference Date
- Feb 11, 1998
- Contested
- Apr 13, 1998
- Closed
- Oct 7, 1998
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 149
Violations and Penalties
- Total Violations
- 10
- Violation Types
- 3 serious, 7 other-than-serious
- Initial Penalties
- $5,090
- Penalties on Record
- $5,090
- Site Address
- 2362 Railroad St, Corona, CA 91720
- Industry
- 327993 Mineral Wool Manufacturing
Programmed Related Inspection: This inspection record is categorized as a programmed related inspection in the DOL OSHA enforcement data. The public DOL category label is preserved here without adding extra interpretation beyond the government label.
Enforcement Outcome
Citation contest activity appears on Apr 13, 1998. Final orders are recorded through Oct 5, 1998. Penalty changes shown on this page reflect the latest amounts published in OSHA's enforcement data.
Violations
Violation list (8 of 10 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 14301 Log and Summary of Occupational Injuries and Illnesses OSHA citation code: 14301 A01 | Other | 1 | 149 | $375 | $375 | Mar 13, 1998 | - | - |
| 01002 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 A05 | Other | 1 | 149 | $185 | $185 | Mar 13, 1998 | - | - |
| 01003 | 3328 Machinery and Equipment OSHA citation code: 3328 D | Other | 1 | 5 | $420 | $420 | Mar 13, 1998 | - | - |
| 01004 | 3556 General OSHA citation code: 3556 B | Other | 1 | 1 | $185 | $185 | Mar 13, 1998 | - | - |
| 01005 | 3577 Protection Devices OSHA citation code: 3577 E | Other | 1 | 10 | $280 | $280 | Mar 13, 1998 | - | - |
| 01006 | 3578 Permissible Wheel Exposure for Periphery Grinding OSHA citation code: 3578 G | Other | 1 | 10 | $185 | $185 | Mar 13, 1998 | - | - |
| 01007 | 5194 Hazard Communication OSHA citation code: 5194 F04 | Other | 1 | 5 | $185 | $185 | Mar 13, 1998 | - | - |
| 02001 | 4185 Foot-Operated Devices | Serious | 2 | 2 | $1,405 | $1,405 | Feb 18, 1998 | - | - |
Showing the 8 violations listed first by citation identifier. This inspection has 10 total violations documented in the U.S. Department of Labor OSHA enforcement database. The complete violation list is available at enforcedata.dol.gov.
Sep 19, 1996#120162466Sep 19, 1996Complaint (B) · Partial scope, Safety#120162466$3753 viol.3 violations$375 in penalties
Inspection #120162466
Dates
- Opened
- Sep 19, 1996
- Closing Conference Date
- Sep 19, 1996
- Closed
- Jul 30, 1997
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 80
- Related Activity
- 1 complaint
Violations and Penalties
- Total Violations
- 3
- Violation Types
- 3 other-than-serious
- Initial Penalties
- $375
- Penalties on Record
- $375
- Site Address
- 2362 Railroad St, Corona, CA 91720
- Industry
- 327993 Mineral Wool Manufacturing
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 (3 of 3 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3400 Medical Services and First Aid OSHA citation code: 3400 C | Other | 1 | 2 | $125 | $125 | Oct 22, 1996 | - | - |
| 01002 | 3382 Eye and Face Protection OSHA citation code: 3382 C | Other | 1 | 2 | $125 | $125 | Oct 22, 1996 | - | - |
| 01003 | 5144 Respiratory Protection OSHA citation code: 5144 C | Other | 1 | 2 | $125 | $125 | Oct 22, 1996 | - | - |
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.
Source: U.S. Department of Labor OSHA incident investigation data (`osha_accident` + `osha_accident_injury`). Linked via `rel_insp_nr` to the inspection activity number (exact government key). Injury, body part, source and event values are OSHA's own codes. OSHA states that these fields are not coded according to the requirements under the Occupational Injury and Illness Classification System (OIICS). Only the values present in the OSHA record are listed; an incident with no value that resolves in OSHA's code table shows "Injury details not recorded". Where a record covers several people, each field lists every value recorded across them.
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.
6 inspections, 1996 to 2018. 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.
Standards cited
Industry comparison
Nonmetallic Mineral Product Manufacturing, 17,270 employers with OSHA inspections. Arithmetic from DOL records.