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Knauf Insulation Inc.: OSHA inspections and violations

Shasta Lake, California · Mineral Wool Manufacturing · NAICS 327993

1inspections
2citation items
$9,275current penalties
May 19, 2020last inspection

OSHA has inspected Knauf Insulation Inc. once in California.

The inspection began on May 19, 2020 after an accident, in Shasta Lake.

That inspection ended with 2 citation items: 1 serious and 1 other-than-serious.

Penalties were first proposed at $9,275 and still stand at $9,275.

How that compares: the median penalty per cited inspection for manufacturing employers since 2015 is $4,500, and Knauf Insulation Inc. averages $9,275 (1 cited inspection).

Knauf Insulation Inc. also files yearly injury logs with OSHA, summarized below.

Knauf Insulation Inc.: OSHA citation items per year, 2020 to 2020
Citation items per year, by inspection date.

California · latest 90 days of OSHA records

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Inspection history

Inspection 344756408 OPENED MAY 19, 2020Closed

Accident · Partial · Safety · 130 employees at the site · Closed Jul 20, 2020

3100 Ashby Road, Shasta Lake, CA 96019 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on May 6, 2020: Employee fractures forearm when struck by cover of magnetic

At 11:02 a.m. on May 6, 2020, Employee #1 was using a pry bar to pry the base of a magnetic drum separator metal cover so that it could be pulled forward with come-along and set down. The cover of the metallic drum separator had been rigged for removal using manual lever chain hoists (come-along). During the attempt to hoist up the metal cover, move it forward and set it down, Employee #1 was struck by the rear part of the metal cover, after it suddenly snapped backwards from its base edge/tip of the metallic drum separator that it sat on. A manual lever chain hoist (come-along) was being used to pull the cover of the metallic drum separator from the front; another manual lever hoist was used to lift it above. The metal cover fell backwards from its base edge and struck Employee #1. Employee #1 sustained a fracture of the left forearm. Employee #1 was hospitalized.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 4999(F)(2)
 Other-than-serious$840$840Jun 26, 2020Final
Citation 2, item 1
29 CFR 4999(D)(2)
 Serious$8,435$8,435Jun 26, 2020Final

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 Shasta Lake site logged 2 recordable injuries or illnesses among about 145 workers: 1.3 per 100 full-time workers, against a median of 2.6 for its industry.

Site and yearWorkersCasesDays-away casesRateIndustry median
Knauf Insulation Plant 4
Shasta Lake · 2025
145 201.32.6

The rules behind these citations

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

Other mineral wool manufacturing employers in California

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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.