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Semano Inc.: OSHA inspections and violations

Hayward, California · Electroplating, Plating, Polishing, Anodizing, and Coloring · NAICS 332813

5inspections
51citation items
$49,355current penalties
Apr 2, 2025last inspection

Semano Inc. has 5 OSHA inspections on record in California, the first in 1995.

OSHA's last visit started on Apr 2, 2025 after a complaint, in Hayward.

Across those inspections OSHA issued 51 citation items: 11 serious and 40 other-than-serious.

OSHA proposed $89,210 in penalties. After settlements and reviews the total is $49,355, down 45%.

For context, across all manufacturing employers the median penalty per cited inspection since 2015 is $3,600. Semano Inc. averages $18,268 over 2 cited inspections in that time.

Semano Inc.: OSHA citation items per year, 1995 to 2025
Citation items per year, by inspection date.

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Inspection history

Inspection 348152422 OPENED APR 2, 2025Closed

Complaint · Partial · Health · 58 employees at the site · Closed Dec 15, 2025

31757 Knapp Street, Hayward, CA 94544 · Electroplating, Plating, Polishing, Anodizing, and Coloring · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3368(B)
 Other-than-serious$410$410Oct 2, 2025Final
Citation 1, item 2
29 CFR 3383(A)
 Other-than-serious$685$685Oct 2, 2025Final
Citation 1, item 3
29 CFR 5143(A)(1)
 Other-than-serious$825$825Oct 2, 2025Final
Citation 1, item 4
29 CFR 5143(A)(5)
 Other-than-serious$825$825Oct 2, 2025Final
Citation 1, item 5
29 CFR 5144(E)(1)
 Other-than-serious$410$410Oct 2, 2025Final
Citation 1, item 6
29 CFR 5144(F)(1)
 Other-than-serious$410$410Oct 2, 2025Final
Citation 1, item 7
29 CFR 5144(H)(2)(A)
 Other-than-serious$410$410Oct 2, 2025Final
Citation 2, item 1
29 CFR 5155(E)(1)
 Serious$12,375$6,185Oct 2, 2025Final

Inspection 341999696 OPENED DEC 28, 2016Closed

Complaint · Partial · Health · 50 employees at the site · Closed Oct 23, 2017

31757 Knapp Street, Hayward, CA 94544 · Electroplating, Plating, Polishing, Anodizing, and Coloring · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1 Other-than-serious$410$300Jun 8, 2017Final
Citation 1, item 2 Other-than-serious$410$0Jun 8, 2017Final
Citation 1, item 3
29 CFR 3203(A)
 Other-than-serious$825$400Jun 8, 2017Final
Citation 1, item 4
29 CFR 3272(B)
 Other-than-serious$515$375Jun 8, 2017Final
Citation 1, item 5
29 CFR 3301(A)
 Other-than-serious$825$700Jun 8, 2017Final
Citation 1, item 6
29 CFR 5143(A)
 Other-than-serious$825$600Jun 8, 2017Final
Citation 1, item 7
29 CFR 5151(A)
 Other-than-serious$825$0Jun 8, 2017Final
Citation 1, item 8
29 CFR 5162(E)
 Other-than-serious$825$600Jun 8, 2017Final
Citation 2, item 1
29 CFR 3480(A)
 Serious$9,000$3,600Jun 8, 2017Final
Citation 3, item 1
29 CFR 5144(C)
 Serious$9,000$900Jun 8, 2017Final
Citation 4, item 1
29 CFR 5151(B)
 Serious$9,000$9,000Jun 8, 2017Final
Citation 5, item 1
29 CFR 5155(E)(1)
 Serious$9,000$900Jun 8, 2017Final
Citation 6, item 1
29 CFR 5162(C)
 Serious$9,000$9,000Jun 8, 2017Final

Inspection 310061700 OPENED OCT 17, 2007Closed

Complaint · Complete · Health · 41 employees at the site · Closed Jan 15, 2009

31757 Knapp Street, Hayward, CA 94544 · Electroplating, Plating, Polishing, Anodizing, and Coloring · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A
 Other-than-serious$410$200Jan 4, 2008Closed
Citation 1, item 2
29 CFR 5097 B01 0
 Other-than-serious$550$400Jan 4, 2008Closed
Citation 1, item 3
29 CFR 5155 E01
 Other-than-serious$550$0Jan 4, 2008Closed
Citation 1, item 4
29 CFR 5194 F04
 Other-than-serious$410$0Jan 4, 2008Closed
Citation 1, item 5
29 CFR 3314 G01
 Other-than-serious$410$300Jan 4, 2008Closed
Citation 1, item 6
29 CFR 5143 A05
 Other-than-serious$515$300Jan 4, 2008Closed
Citation 1, item 7
29 CFR 5006 A
 Other-than-serious$305$225Jan 4, 2008Closed
Citation 1, item 8
29 CFR 6151 G01
 Other-than-serious$340$200Jan 4, 2008Closed
Citation 1, item 9
29 CFR 3364 A
 Other-than-serious$410$300Jan 4, 2008Closed
Citation 1, item 10
29 CFR 3480 A
 Other-than-serious$550$0Jan 4, 2008Closed
Citation 1, item 11
29 CFR 3650 T07
 Other-than-serious$305$225Jan 4, 2008Closed
Citation 1, item 12
29 CFR 3328 D
 Other-than-serious$305$225Jan 4, 2008Closed
Citation 1, item 13 Other-than-serious$275$200Jan 4, 2008Closed
Citation 1, item 14
29 CFR 461 A
 Other-than-serious$275$200Jan 4, 2008Closed
Citation 1, item 15
29 CFR 3203 B
 Other-than-serious$275$0Jan 4, 2008Closed
Citation 2, item 1
29 CFR 5162 C
 Serious$3,710$1,800Jan 4, 2008Closed
Citation 3, item 1
29 CFR 5164 A
 Serious$3,710$1,800Jan 4, 2008Closed
Citation 4, item 1 Serious$2,475$1,800Jan 4, 2008Closed
Citation 5, item 1
29 CFR 5194 H01
 Other-than-serious$2,475$500Jan 4, 2008Closed

Inspection 125627570 OPENED DEC 29, 1999Closed

Accident · Partial · Health · 38 employees at the site · Closed Jun 13, 2000

31757 Knapp Street, Hayward, CA 94544 · Electroplating, Plating, Polishing, Anodizing, and Coloring · OSHA's record · Phone and website on Google Maps

Incident on Nov 5, 1999: Employee suffers chemical burns in hazardous atmosphere

At approximately 11:30 a.m. on November 5, 1999, Employee #1 was assigned by his supervisor to wipe down a 48-in. by 36-in.by-20-in. steel tank with small amoun ts of nitric acid, a task that Employee #1 normally does not perform. Employee # 1 began to feel light-headed and nauseous while wiping down the sides of the tan k and eventually went to the emergency room. Employee #1 suffered caustic burns to his lungs due to his using nitric acid to clean an enclosed metal tank. Emplo yee #1 was held for medical observation as a precautionary measure, but was not hospitalized.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3203 A
 Other-than-serious$310$310Mar 6, 2000Closed
Citation 1, item 2
29 CFR 5194 H01
 Other-than-serious$310$310Mar 6, 2000Closed
Citation 1, item 3
29 CFR 14301 B
 Other-than-serious$275$275Mar 6, 2000Closed

Inspection 119667822 OPENED DEC 6, 1995Closed

Complaint · Partial · Health · 24 employees at the site · Closed Jan 10, 1996

31757 Knapp Street, Hayward, CA 94544 · Electroplating, Plating, Polishing, Anodizing, and Coloring · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 14301 A01
 Other-than-serious$300$300Jan 18, 1996Closed
Citation 1, item 2
29 CFR 461 A
 Other-than-serious$300$300Jan 18, 1996Closed
Citation 1, item 3
29 CFR 3203 A
 Other-than-serious$225$225Jan 18, 1996Closed
Citation 1, item 4
29 CFR 3241 A
 Other-than-serious$225$225Jan 18, 1996Closed
Citation 1, item 5
29 CFR 5194 E01
 Other-than-serious$225$225Jan 18, 1996Closed
Citation 1, item 6
29 CFR 5194 F04
 Other-than-serious$225$225Jan 18, 1996Closed
Citation 2, item 1
29 CFR 5162 C
 Serious$875$875Jan 18, 1996Closed
Citation 3, item 1
29 CFR 5530 A
 Serious$875$875Jan 18, 1996Closed

The rules behind these citations

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

29 CFR 1430.29

29 CFR 2340.1

29 CFR 2340.16

29 CFR 2340.22

Other electroplating, plating, polishing, anodizing, and coloring 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.