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Delta Star, Inc.: OSHA inspections and violations

San Carlos, California · Power, Distribution, and Specialty Transformer Manufacturing · NAICS 335311

23inspections
71citation items
$132,920current penalties
Nov 13, 2025last inspection

Since 1994, OSHA inspectors have visited Delta Star, Inc. in California 23 times.

The most recent inspection opened on Nov 13, 2025 after an accident, in San Carlos.

In all, OSHA issued 71 citation items: 22 serious, 2 repeat and 47 other-than-serious.

The proposed penalties came to $189,120; today they stand at $132,920, 30% less.

Among manufacturing employers, the typical cited inspection since 2015 ends with a $3,600 penalty. Delta Star, Inc. averages $8,119 across 6 cited inspections.

Delta Star, Inc. also files yearly injury logs with OSHA, summarized below.

Delta Star, Inc.: OSHA citation items per year, 1994 to 2025
Citation items per year, by inspection date.

California · latest 90 days of OSHA records

1,128employers cited

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Inspection history

Inspection 348590845 OPENED NOV 13, 2025Closed

Accident · Partial · Safety · 101 employees at the site · Closed May 25, 2026

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 5549(A)
Serious$18,000$18,000May 1, 2026Final

Inspection 348086729 OPENED MAR 6, 2025Closed

Complaint · Partial · Health · 100 employees at the site · Closed Aug 11, 2025

270 Industrial Road, San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 5143(A)(5)
Other-than-serious$625$465Jul 16, 2025Final
Citation 1, item 2
29 CFR 5446(C)
Other-than-serious$500$375Jul 16, 2025Final
Citation 1, item 3
29 CFR 5446(H)
Other-than-serious$500$375Jul 16, 2025Final
Citation 1, item 4
29 CFR 5453(M)
Other-than-serious$625$465Jul 16, 2025Final

Inspection 347005225 OPENED OCT 2, 2023Closed

Accident · Partial · Safety · 240 employees at the site · Closed Jan 29, 2024

270 Industrial Road, San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3384(B)
Other-than-serious$750$750Jan 18, 2024Final

Inspection 346490618 OPENED FEB 7, 2023Closed

Complaint · Partial · Safety · 101 employees at the site · Closed Aug 3, 2023

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 346103237 OPENED JUL 26, 2022Closed

Accident · Partial · Safety · 500 employees at the site · Closed Aug 7, 2023

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203(A)(4)
Serious$18,000$10,800Jan 12, 2023Final
Citation 2, item 1
29 CFR 4184(A)
Serious$18,000$10,800Jan 12, 2023Final

Inspection 345510556 OPENED SEP 2, 2021Closed

Accident · Partial · Safety · 100 employees at the site · Closed Jan 13, 2022

270 Industrial Road, San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Jun 18, 2021: Employee fractures hip in fall from ladder

At 6:30 p.m. on June 18, 2021, an employee was working on a pipe from the third step of a ladder. He fell off the ladder, fracturing his hip, resulting in his hospitalization.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 342(A)
Other-than-serious$5,000$5,000Dec 9, 2021Final
Citation 1, item 2
29 CFR 3205(C)
Other-than-serious$560$560Dec 9, 2021Final

Inspection 341951374 OPENED DEC 6, 2016Closed

Accident · Partial · Safety · 230 employees at the site · Closed Jun 1, 2017

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203(B)
Other-than-serious$375$375May 1, 2017Final
Citation 1, item 2
29 CFR 3203(A)
Other-than-serious$750$750May 1, 2017Final

Inspection 315778324 OPENED JAN 23, 2015Closed

Follow-up · Partial · Safety · 70 employees at the site · Closed Feb 10, 2015

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

15 older inspections

Inspection 315774646 OPENED AUG 8, 2012Closed

Accident · Partial · Safety · 219 employees at the site · Closed Jan 16, 2013

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Aug 3, 2012: Employee suffers a finger amputation by drill press

At approximately 12:15 p.m., on August 3, 2012, Employee #1 suffered an amputati on of his left index finger when his work glove got entangled in the rotating dr ill bit while operating a drill press at Delta Star, Inc. At the time of the acc ident, Employee #1 had just drilled a hole on one side of an aluminum battery br acket (7-inch channel, 3/8 inch thick) and was ready to drill a second hole. Emp loyee #1 said sharp aluminum shavings from the drilling operation got into his l eft glove and was deeply scraping his skin. As Employee #1 tried to remove the s havings with his right hand, his left glove was pulled and wrapped around the dr ill bit. Employee #1 immediately stopped the machine and pulled his left hand ou t from the glove. Employee #1 yelled for help and Employee #2 and other coworker s responded. Employee #2 said he was approximately 10 feet away from Employee #1 when the accident happened. Employee #2 said the drill press had already been t urned off when he responded and Employee #1 was holding his left hand. Employee #2 removed the glove that was wrapped around the drill bit. According to the Ope rations Manager, employees wore tight-fitting gloves provided by the company, to protect the employees' hands from sharp edges of aluminum pieces. The pair of g loves worn by Employee #1 at the time of the accident was a "Body Guard Safety G ear." The Drill Press involved in the accident was identified as Equipment 110, Powermatic Drill Press, Model No. 1150, Serial No. 815V1778. Employee #1 was tak en to Stanford Hospital where he was treated for his injuries.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A
Other-than-serious$375$375Dec 14, 2012Closed
Citation 2, item 1
29 CFR 3384 B
Serious$18,000$9,000Dec 14, 2012Closed
Citation 3, item 1
29 CFR 4002 A
Serious$3,375$3,375Dec 14, 2012Closed

Inspection 310099239 OPENED FEB 8, 2011Closed

Accident · Partial · Safety · 2,000 employees at the site · Closed Jul 9, 2012

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Jan 22, 2011: Employee falls from ladder, receives unspecified injuries

On January 22, 2011, Employee #1 was cleaning the floors of a transformer tank. To access the tank, he entered into a scissor lift that elevated him to an appro ximately height of 14 ft. He then climbed into the tank and down approximately f ourteen feet to its floors. After cleaning the floor, he needed to climb down fr om the top of the tank. The employer provided a ladder that was approximately 16 ft long. While he descended the ladder, the ladder slid from the top edge of th e tank, and he fell to the ground, striking the front of his torso on the fallen ladder. He suffered a serious and unspecified injury that required over 24 hour s of hospitalization and included a laceration on his face. On or before the tim e of the accident inspection, the employer did not provide a portable ladder to access the upper landing surface of the tank. Additionally, the employer had no knowledge that Employee #1 did not secure the ladder. The ladder would usually b e tied up and secured during this operation, but the employer knew about the sho rt ladder.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3276 E11
Other-than-serious$2,250$2,250Feb 28, 2011Final
Citation 2, item 1
29 CFR 342 A
Other-than-serious$5,000$3,000Feb 28, 2011Final

Inspection 310099056 OPENED JAN 5, 2011Closed

Complaint · Partial · Health · 2,000 employees at the site · Closed Jan 11, 2011

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 310094693 OPENED OCT 22, 2008Closed

Accident · Partial · Safety · 180 employees at the site · Closed Dec 31, 2009

270 Industrial Rd., San Carlos, CA 94070 · Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Oct 2, 2008: Employee is pinned by scissor lift, sustains fractures

At approximately 12:58 p.m. on October 2, 2008, Employee #1 was working and was standing on the mid-rails of a mobile scissors lift positioned adjacent to struc tural beams and a steel frame on each side of the unit. As Employee #1 was stand ing on the mid-rails, the scissor lift began to rise without his intentional eng agement of the foot pedal or joystick two-point activation system. Employee #1 s tated that the emergency stop button also did not work when he tried to stop the lift going up, resulting in severe crushing injuries to his left foot and right thigh. Employee #1's right thigh impacted with the steel beam at approximately 11.5 ft above the floor and his left foot impacted the steel frame at approximat ely 10 ft above the floor. Employee #1 was pinned by the malfunctioning scissors lift, and suffered a fractured left foot. Employee #1 was hospitalized.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3638 D
Other-than-serious$300$100Jan 8, 2009Closed
Citation 1, item 3
29 CFR 3640 D02
Other-than-serious$300$300Jan 8, 2009Closed
Citation 2, item 1 Other-than-serious$2,700$100Jan 8, 2009Closed
Citation 3, item 1
29 CFR 3328 G
Other-than-serious$2,700$100Jan 8, 2009Closed
Citation 4, item 1
29 CFR 3640 B
Serious$18,000$12,000Jan 8, 2009Closed
Citation 5, item 1
29 CFR 3646 E
Other-than-serious$5,400$300Jan 8, 2009Closed

Inspection 300843653 OPENED OCT 21, 2005Closed

Accident · Partial · Safety · 100 employees at the site · Closed Dec 31, 2006

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Oct 21, 2005: Four employees are injured when struck by transformer

On October 21, 2005, four employees were injured when they were struck by a 78,0 00-lb electrical transformer that was being lifted. No other information was pro vided in the narrative. Employee #1 was hospitalized for treatment of a concussi on. Employee #1 was hospitalized for treatment of an unspecified amputation. Emp loyee #3 suffered bruises and/or abrasions, but was not hospitalized. Employee # 4 was hospitalized for an unspecified injury or illness.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A
Other-than-serious$500$0Feb 24, 2006Final
Citation 1, item 2
29 CFR 3381 A
Other-than-serious$250$125Feb 24, 2006Final
Citation 1, item 4
29 CFR 4896 D
Other-than-serious$280$125Feb 24, 2006Final
Citation 1, item 5
29 CFR 5008 E01
Other-than-serious$375$125Feb 24, 2006Final
Citation 1, item 6
29 CFR 5009 B
Other-than-serious$500$0Feb 24, 2006Final
Citation 1, item 7
29 CFR 5031 C
Other-than-serious$500$125Feb 24, 2006Final
Citation 1, item 8
29 CFR 5033
Other-than-serious$250$125Feb 24, 2006Final
Citation 3, item 1
29 CFR 5022 D
Serious$3,375$1,620Feb 24, 2006Final
Citation 4, item 1
29 CFR 5021 A
Serious$16,200$16,200Feb 24, 2006Final

Inspection 300841921 OPENED OCT 27, 2004Closed

Accident · Partial · Safety · 130 employees at the site · Closed Jun 30, 2005

270 Industrial Rd., San Carlos, CA 94070 · Power, Distribution, and Specialty Transformer Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Oct 27, 2004: Employee burns hands due to electrocution

At about 9:25 a.m. on October 27, 2004, Employee #1 was working with a coworker on testing a large industrial transformer. Another large transformer was providi ng the energy for the tests and Employee #1 was going to change the connections on this transformer. However, he did so before the energy dissipated after switc h-off. Consequently, an electrical flash occurred since Employee #1 disturbed th e connection. Employee #1 seriously burned both his wrists and arms. He was hosp italized.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 2940 B
Other-than-serious$300$300Apr 20, 2005Closed

Inspection 125526905 OPENED JAN 4, 2001Closed

Accident · Complete · Safety · 165 employees at the site · Closed Feb 28, 2001

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Incident on Nov 8, 2000: Employee injured in fall from elevation

Employee #1, a senior welder, was positioning a steel plate held in place by tab s welded to other steel plates as he was lubricating a tank. The tabs were piece s of metal that were 0.375 inches thick, 2.25 inches wide, and 7.125 inches long . The tabs gave way as he was leveling a corner of the plate with a lever. Emplo yee #1 was not wearing any personal fall protection. He fell approximately six f eet to the floor, sustaining a fractured back. Employee #1 was hospitalized for his injury.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3210 C
Other-than-serious$525$525Feb 23, 2001Closed

Inspection 125521047 OPENED JUN 9, 1999Closed

Complaint · Complete · Health · 170 employees at the site · Closed Aug 12, 2002

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 4851 A
Other-than-serious$315$315Dec 8, 1999Closed
Citation 1, item 2 Other-than-serious$315$315Dec 8, 1999Closed
Citation 1, item 3
29 CFR 5143 A05
Other-than-serious$210$210Dec 8, 1999Closed
Citation 1, item 4
29 CFR 5097 D01
Other-than-serious$0$0Dec 8, 1999Closed
Citation 1, item 5
29 CFR 5098 A05
Other-than-serious$0$0Dec 8, 1999Closed
Citation 1, item 6
29 CFR 5099 A01
Other-than-serious$425$425Dec 8, 1999Closed
Citation 1, item 7
29 CFR 5144 C01
Other-than-serious$635$635Dec 8, 1999Closed
Citation 1, item 8
29 CFR 5100 B
Other-than-serious$425$425Dec 8, 1999Closed
Citation 1, item 9
29 CFR 5100 C
Other-than-serious$0$0Dec 8, 1999Closed
Citation 1, item 10
29 CFR 14301 A02
Other-than-serious$0$0Dec 8, 1999Closed
Citation 2, item 1
29 CFR 4227 A
Serious$1,060$1,060Dec 8, 1999Closed
Citation 3, item 1
29 CFR 4002 A
Serious$105$105Dec 8, 1999Closed
Citation 4, item 1
29 CFR 5194 H01
Serious$1,590$1,590Dec 8, 1999Closed
Citation 5, item 1
29 CFR 5097 B01
Repeat$2,550$2,550Dec 8, 1999Closed
Citation 6, item 1
29 CFR 5097 D04
Repeat$1,700$1,700Dec 8, 1999Closed
Citation 7, item 1
29 CFR 5097 D05 B
Serious$6,375$1,590Dec 8, 1999Closed

Inspection 125517227 OPENED FEB 22, 1999Closed

Accident · Partial · Safety · 150 employees at the site · Closed Apr 20, 1999

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Incident on Feb 1, 1999: Employee injured in fall from ladder

Employee #1, a maintenance worker, was assigned to repair the stuck roll-up bay door at the plant. Employee #1 used a 16-ft ladder to go about his assignment. T he door was stuck with the bottom of the roll-up door approximately 8 ft to 9 ft above the ground. Employee #1 was seen with one foot on the lip of the door and the other on the ladder step as he was trying to dislodge the door with his wei ght. Employee #1 lost his balance and fell to the concrete floor. He sustained l acerations in the face and chin, but did not require hospitalization.

No citations from this inspection.

Inspection 125519850 OPENED SEP 16, 1998Closed

Accident · Partial · Safety · 120 employees at the site · Closed Jun 7, 2000

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Incident on Sep 16, 1998: Electric shock & burn - direct contact with energized parts

An employee climbed a ladder to the top surface of an energized transformer to r etrieve a screwdriver. He contacted a terminal on the transformer and received a n electric shock and burns requiring the surgical amputation of his arm. He was hospitalized for his injuries.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3314 G
Other-than-serious$225$225Jan 29, 1999Closed
Citation 2, item 1
29 CFR 3314 B
Serious$750$750Jan 29, 1999Final
Citation 3, item 1
29 CFR 2930 B
Serious$5,000$5,000Jan 29, 1999Final

Inspection 125515353 OPENED JUL 29, 1998Closed

Accident · Partial · Safety · 150 employees at the site · Closed Dec 31, 1998

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Incident on Jun 2, 1998: Employee's finger amputated after jumping from trailer

On June 2, 1998, Employee #1, a supervisor, was steadying himself on a low-bed t railer by holding on to a radiator-cooler. The employee jumped to the floor, a d istance of less than 30 in. As Employee #1 jumped, his ring was caught by the ed ge of the metal frame of the cooler, amputating his left ring finger.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A04
Other-than-serious$260$260Oct 23, 1998Closed

Inspection 119737310 OPENED JAN 21, 1998Closed

Unprogrammed related · Partial · Safety · 190 employees at the site · Closed Oct 24, 2001

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A01
Other-than-serious$210$210Jun 11, 1998Final
Citation 1, item 2
29 CFR 3203 B02
Other-than-serious$210$210Jun 11, 1998Final
Citation 2, item 1
29 CFR 3210 A
Serious$1,590$1,060Jun 11, 1998Final

Inspection 120351739 OPENED JAN 21, 1998Closed

Unprogrammed related · Partial · Health · 190 employees at the site · Closed Oct 24, 2001

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 4848 A
Other-than-serious$635$315Jun 11, 1998Final
Citation 2, item 1
29 CFR 5420 A02
Serious$5,000$5,000Jun 11, 1998Final

Inspection 111805461 OPENED FEB 19, 1997Closed

Complaint · Partial · Health · 176 employees at the site · Closed Mar 2, 2001

1777 Industrial Way, Belmont, CA 94002 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3328 B
Other-than-serious$635$635Aug 13, 1997Final
Citation 1, item 2
29 CFR 5097 B01
Other-than-serious$475$475Aug 13, 1997Final
Citation 1, item 3
29 CFR 5097 D04
Other-than-serious$210$210Aug 13, 1997Final
Citation 1, item 4
29 CFR 14305 D01
Other-than-serious$425$425Aug 13, 1997Final
Citation 2, item 1
29 CFR 5097 C10
Serious$1,590$1,590Aug 13, 1997Final
Citation 3, item 1
29 CFR 5097 D04
Serious$2,125$2,125Aug 13, 1997Final
Citation 4, item 1
29 CFR 3301 A
Serious$1,590$1,590Aug 13, 1997Final
Citation 5, item 1
29 CFR 3577 E
Serious$1,060$1,060Aug 13, 1997Final
Citation 6, item 1
29 CFR 3578 G
Serious$1,060$1,060Aug 13, 1997Final

Inspection 119741858 OPENED DEC 1, 1994Closed

Accident · Partial · Safety · 120 employees at the site · Closed Jul 16, 1996

270 Industrial Rd., San Carlos, CA 94070 · OSHA's record · Phone and website on Google Maps

Incident on Nov 18, 1994: Employee's finger amputated by press die

At approximately 10:30 p.m. on November 18, 1994, Employee #1, of Delta Star, In c., was helping a press brake operator set up the machine before a production ru n. As the operator reached around the end of the machine to adjust the controls, he also pressed the machine's foot pedal to move the slide down. At the same ti me, Employee #1 reached his hand through the point of operation to reposition wh at he thought was a displaced backstop. His left index finger was amputated.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A07 C
Other-than-serious$150$150Apr 28, 1995Final
Citation 2, item 1
29 CFR 4206 A
Other-than-serious$75$15Apr 28, 1995Final
Citation 3, item 1
29 CFR 4214 C01
Serious$5,000$750Apr 28, 1995Final

Injury and illness logs

From the Form 300A summaries employers file with OSHA each year. Rate = recordable cases per 100 full-time workers.

In 2025, the San Carlos site logged 17 recordable injuries or illnesses among about 317 workers: 5.2 per 100 full-time workers, against a median of 1.4 for its industry. Those cases cost 178 days away from work.

Site and yearWorkersCasesDays-away casesRateIndustry median
DSW
San Carlos · 2025
317 17155.21.4
Delta Star INC
San Carlos · 2024
277 342811.91.4

The rules behind these citations

Current text from the Code of Federal Regulations. Some citations were issued under older wording.

29 CFR 2340.16

29 CFR 2340.2

Other power, distribution, and specialty transformer manufacturing employers in California

Alert subscribers get notified of each newly cited employer in California the morning it is posted. See the alert plans.

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.