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Tetra Tech Inc.: OSHA inspections and violations

Vandenburg Afb, California · Engineering Services · NAICS 541330

9inspections
9citation items
$4,650current penalties
Mar 27, 2025last inspection

Since 1997, OSHA inspectors have visited Tetra Tech Inc. in California 9 times.

The most recent inspection opened on Mar 27, 2025 after a complaint, in Altadena and is still open.

In all, OSHA issued 9 citation items: 9 other-than-serious.

The proposed penalties came to $5,115; today they stand at $4,650, 9% less.

Among professional services employers, the typical cited inspection since 2015 ends with a $1,821 penalty. Tetra Tech Inc. averages $1,450 across 3 cited inspections.

1 inspection on this page followed a fatal incident.

Tetra Tech Inc.: OSHA citation items per year, 1997 to 2025
Citation items per year, by inspection date.

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Inspection history

Inspection 348142308 OPENED MAR 27, 2025Open

Complaint · Partial · Health · 2,630 employees at the site · Open

2450 Lake Ave., Altadena, CA 91001 · Commercial and Institutional Building Construction · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203(B)
Other-than-serious$450$450Sep 23, 2025Contested
Citation 1, item 2
29 CFR 3203(A)(7)(F)
Other-than-serious$900$900Sep 23, 2025Contested
Citation 1, item 3
29 CFR 3395(I)
Other-than-serious$900$900Sep 23, 2025Contested
Citation 1, item 4
29 CFR 5144(G)(1)(A)1.
Other-than-serious$900$900Sep 23, 2025Contested

Inspection 343968566 OPENED APR 24, 2019Closed

Follow-up · Partial · Safety · 1,000 employees at the site · Closed Aug 2, 2019

3000 S 7th Street, Oroville, CA 95965 · Engineering Services · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 343624094 OPENED NOV 28, 2018Closed

Referral · Partial · Health · 1,000 employees at the site · Closed Jan 31, 2020

16177 Rock Creek Rd., Redding, CA 96001 · Engineering Services · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 1509(A)
Other-than-serious$375$375Jan 2, 2019Final

Inspection 343569166 OPENED OCT 30, 2018Closed

Fatality or catastrophe · Partial · Safety · 4 employees at the site · Closed Aug 31, 2020

6583 St Helena Rd, Santa Rosa, CA 95404 · Surveying and Mapping (except Geophysical) Services · OSHA's record · Phone and website on Google Maps

Incident on Oct 29, 2018 (fatal): Employee dies from cardiac arrest during walk up incline

At 11:11 a.m. on October 29, 2018, three employees were in the process of walking Primary Electrical Lines inspecting and surveying hazards to future tree trimming operations. The employees were walking up an incline at a slow pace while surveying the tree line when Employee #1 collapsed. Employee #1 was walking a slow pace up the incline as they surveyed the tree line, wearing a long sleeve shirt, canvas pants, and a high visibility vest, and carried a cell phone and 2 rolls of tape. The coroners report stated that the cause of death Arteriosclerotic Cardiovascular Disease.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203(B)(2)
Other-than-serious$375$375Feb 11, 2019Final
Citation 1, item 2
29 CFR 3395(H)(1)
Other-than-serious$560$450Feb 11, 2019Final

Inspection 341320562 OPENED MAR 11, 2016Closed

Planned · Complete · Safety · 17,000 employees at the site · Closed Mar 29, 2016

17885 Von Karman Ave., Suite 500, Irvine, CA 92614 · Engineering Services · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 309915585 OPENED JUL 15, 2009Closed

Planned · Complete · Safety · 8,000 employees at the site · Closed Dec 2, 2009

20400 S Main St, Carson, CA 90745 · Industrial Building Construction · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3395 E03
Other-than-serious$280$0Jul 31, 2009Final

Inspection 106354111 OPENED NOV 8, 2006Closed

Planned · Partial · Safety · 1 employee at the site · Closed Nov 8, 2006

Marshillia Ranch Golf Course, Vandenberg Afb, CA 93437 · Site Preparation Contractors · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 125884379 OPENED JUL 29, 2003Closed

Accident · Partial · Safety · 14 employees at the site · Closed Jul 12, 2008

Demo Site At Corner Of Tippecanoe & 3rd Street, San Bernardino, CA 92414 · Site Preparation Contractors · OSHA's record · Phone and website on Google Maps

Incident on Jul 3, 2003: Employee injured when leg struck by tree limb being cut

At 10:00 a.m. on July 3, 2003, Employee #1, a tree worker, was cutting tree limb s at a demolition work site located in San Bernardino, California. Employee #1 w as cutting off a branch or limb of a 20-foot-long downed tree with a powered cha in saw near a ditch. Employee #1 completed a cut of a limb at the top of the tre e. The limb got detached and kicked back hitting Employee #1's lower left leg, c ausing serious fracture injuries to his tibia and fibula. Initially, Employee #1 was taken to the Fox Occupational Clinic in San Bernardino, and he was referred to an Orthopedist office for treatment. On July 7, 2003, surgery was performed at the St. Bernadine Medical Center. Employee #1 was hospitalized for two days.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 B01
Other-than-serious$375$300Dec 18, 2003Closed
1 older inspection

Inspection 109508085 OPENED MAR 31, 1997Closed

Planned · Complete · Safety · 8 employees at the site · Closed Apr 22, 1997

Bldg 6830 Consolidated Accumulation Point (cap), Vandenburg Afb, CA 93437 · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

The rules behind these citations

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

Other engineering services employers in California

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.