OSHA has inspected Thermal Structures Inc 6 times in California since 1996.
The latest one began on Aug 6, 2018 after an accident, in Corona.
Those inspections ended with 23 citation items: 6 serious and 17 other-than-serious.
Penalties were first proposed at $72,340 and now stand at $21,390, 70% lower after settlements or reviews.
How that compares: the median penalty per cited inspection for manufacturing employers since 2015 is $3,600, and Thermal Structures Inc averages $5,850 (1 cited inspection).
Thermal Structures Inc also files yearly injury logs with OSHA, summarized below.
Inspection 343360483 OPENED AUG 6, 2018Closed
Accident · Partial · Safety · 297 employees at the site · Closed Oct 3, 2019
2380 Railroad St, Corona, CA 92880 · Other Aircraft Parts and Auxiliary Equipment Manufacturing · OSHA's record · Phone and website on Google Maps
Incident on Jul 25, 2018: Employee is struck by falling mold and fractures wrist
At 8:32 a.m. on July 25, 2018, an employee was lifting a female mold that was not secured to the forklift when it fell off and struck his left hand's wrist against the male side of the mold. The employee fractured his wrist and was hospitalized.
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|
| Citation 1, item 1 29 CFR 3203(A) |
Other-than-serious | $6,750 | $450 | Jan 24, 2019 | Final |
| Citation 2, item 1 29 CFR 3704 |
Serious | $18,000 | $5,400 | Jan 24, 2019 | Final |
Inspection 316207182 OPENED APR 24, 2012Closed
Accident · Partial · Safety · 460 employees at the site · Closed Nov 22, 2013
2362 Railroad St, Corona, CA 92880 · Other Aircraft Parts and Auxiliary Equipment Manufacturing · OSHA's record · Phone and website on Google Maps
Incident on Apr 17, 2012: Employee amputates finger in pneumatic punch press
At 11:30 a.m. on April 17, 2012, Employee #1 was punching holes in an aluminum s trip (12 inches by 24 inches) using a pneumatic punch press (HP-7, SCHRADER BELL OWS, Serial Number SHH17066A, Model ABG122121, 250 psi). The employer is engaged in the manufacturing of aerospace insulation, had a total of 780 employees, and was nonunionized. Employee #1 was a regular full time employee of the employer. At the time of accident, Employee #1 had made three holes and he was trying to make the fourth hole. As he tried to feel the position of the notch, he accident ally activated the foot pedal and his left middle finger got caught in the point of operation, causing the amputation of his finger.
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|
| Citation 1, item 1 29 CFR 4203 B |
Serious | $6,750 | $675 | Sep 20, 2012 | Final |
| Citation 2, item 1 29 CFR 4206 A |
Serious | $18,000 | $6,750 | Sep 20, 2012 | Final |
Inspection 313508624 OPENED MAY 18, 2010Closed
Accident · Partial · Safety · 370 employees at the site · Closed Feb 15, 2012
2362 Railroad St, Corona, CA 92880 · Other Aircraft Parts and Auxiliary Equipment Manufacturing · OSHA's record · Phone and website on Google Maps
Incident on May 5, 2010: Employee gets hand caught in machine
On May 5, 2010, Employee #1 of Thermal Structures Inc., had a non serious injury as his hand got caught in a machine while performing his duties as machine oper ator. Employee #1 was not hospitalized.
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|
| Citation 1, item 1 29 CFR 3314 C |
Other-than-serious | $750 | $450 | Oct 14, 2010 | Final |
| Citation 2, item 1 29 CFR 3942 A |
Other-than-serious | $3,375 | $450 | Oct 14, 2010 | Final |
Inspection 310601786 OPENED FEB 14, 2008Closed
Accident · Partial · Safety · 115 employees at the site · Closed Mar 23, 2010
2380 Railroad St Ste 102, Corona, CA 92880 · Other Aircraft Parts and Auxiliary Equipment Manufacturing · OSHA's record · Phone and website on Google Maps
Incident on Nov 1, 2007: Employee amputates fingers while using press
At approximately 7:30 a.m. on November 1, 2007, Employee #1 was making insulatio n blankets from Aluminum foil on a 50-ton hydraulic forming press, Number PR-8, ("Grimco", Model Number 50-7, Serial Number 119444,), located in the production department. Employee #1 positioned the pedestal with the two-hand operating cont rols close enough to the forming press to allow himself to depress the control b uttons with his elbows and still reach within the point of operation with both h ands. While Employee #1 was maneuvering the foil position on the bottom die (mol d) with his both hands, the upper die came down and pinned the fingers of both h is hands between them causing amputation injuries. Employee #1 was hospitalized.
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|
| Citation 1, item 1 29 CFR 342 A |
Other-than-serious | $5,000 | $1,000 | Apr 9, 2008 | Final |
| Citation 1, item 2 29 CFR 4208 A05 |
Other-than-serious | $750 | $0 | Apr 9, 2008 | Final |
| Citation 1, item 3 29 CFR 4208 C05 |
Other-than-serious | $750 | $0 | Apr 9, 2008 | Final |
| Citation 2, item 1 29 CFR 4193 E01 |
Other-than-serious | $6,750 | $750 | Apr 9, 2008 | Final |
From the Form 300A summaries employers file with OSHA each year. Rate = recordable cases per 100 full-time workers.
In 2025, the Corona site logged 17 recordable injuries or illnesses among about 440 workers: 3.3 per 100 full-time workers, against a median of 1.1 for its industry. Those cases cost 326 days away from work.
Current text from the Code of Federal Regulations. Some citations were issued under older wording.
Source: U.S. Department of Labor, OSHA enforcement data. A citation is OSHA's allegation; employers can contest it, and the status column shows where each item stands. Something wrong on this page? Tell us.
