PlainWorker
Employers › CA

Mining, Quarrying, Oil & Gas · Volcano, CA

Zebroski INC DBA Quarry Stone

According to OSHA enforcement records (2010–2026), Zebroski INC DBA Quarry Stone ranks #98,495 of 99,447 penalized U.S. employers by total current penalty, with a relatively clean safety record: 2 violations across 3 inspections.

Lower half by penalty0% serious
$125
OSHA penalties
2
Violations cited
3
OSHA inspections
#98,495
of 99,447 penalized employers

Zebroski INC DBA Quarry Stone in Volcano, CA has been the subject of 3 OSHA workplace inspections and 2 citations since 2010, according to enforcement records from the U.S. Department of Labor. Total penalties assessed: $125. All enforcement data below is sourced from the DOL public enforcement databases at data.dol.gov.

The record in one line

OSHA has inspected Zebroski INC DBA Quarry Stone 3 times over 3 years, roughly annually. These inspections resulted in 2 violations, averaging 0.7 per inspection, on the lighter side. According to OSHA enforcement records, its total current penalty ranks #98,495 of 99,447 penalized U.S. employers (the lower half of penalized employers nationally). Against the Mining, Quarrying, Oil & Gas industry average of 2 inspections per employer, this runs moderately above peers (1.3x the sector average) on inspection frequency. For comparison, Frank B Marks & Son INC in Newman, CA is another mining, quarrying, oil & gas employer with 7 OSHA inspections on record and $135 in current penalties.

0.7
violations per inspection
0.0%
of violations were serious
#98,495
of 99,447 penalized employers

Compliance score

B 80/100
  • B OSHA safety compliance: 2 violations across 3 OSHA inspections (0.7 per inspection), vs. national p10 0.0 (best) / p90 5.5 (worst) among 145,626 inspected employers.

Channels are separate federal datasets: a dimension marked not applicable simply has no record in that dataset for this employer, not a good or bad score.

Open my watchlist

How Zebroski INC DBA Quarry Stone compares on OSHA penalties

Total current penalty vs the Mining, Quarrying, Oil & Gas per-employer average

in penalties

What this shows Zebroski INC DBA Quarry Stone runs well below peers (0.03x the sector average) in total OSHA penalties.

Source U.S. Department of Labor, OSHA enforcement extracts As of 2026

Where this penalty ranks nationally

Total current OSHA penalty vs every U.S. employer with a nonzero penalty

$125 Top 1% most affordable more affordable than 99% of 99,447 U.S. employers with a penalty

$0–$5,000: 43,959 U.S. employers with a penalty (44%). This entry sits in this band. $5,000–$10,000: 20,304 U.S. employers with a penalty (20%). Above this entry. $10,000–$15,000: 11,027 U.S. employers with a penalty (11%). Above this entry. $15,000–$20,000: 6,546 U.S. employers with a penalty (7%). Above this entry. $20,000–$25,000: 4,175 U.S. employers with a penalty (4%). Above this entry. $25,000–$30,000: 2,877 U.S. employers with a penalty (3%). Above this entry. $30,000–$35,000: 2,036 U.S. employers with a penalty (2%). Above this entry. $35,000–$40,000: 1,493 U.S. employers with a penalty (2%). Above this entry. $40,000–$45,000: 1,095 U.S. employers with a penalty (1%). Above this entry. $45,000–$50,000: 785 U.S. employers with a penalty (1%). Above this entry. $50,000–$55,000: 5,150 U.S. employers with a penalty (5%). Above this entry. This employer $0 $55,000 every penalized U.S. employer, bucketed by value

Each bar is a $5K-wide band; taller bars hold more U.S. employers with a penalty. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Department of Labor, OSHA enforcement extracts · 2026

Does more inspection scrutiny mean more findings?

Each dot is one of 21 Mining, Quarrying, Oil & Gas employers with an OSHA inspection on record, placed by inspections and violations cited. The highlighted dot is Zebroski INC DBA Quarry Stone.

Frequently inspected, many findingsRarely inspected, many findingsFrequently inspected, clean recordBelow median on both3.03.033.03.003.16.39.412.6OSHA inspectionsViolations citedFRONTIER DRILLING LLC, OSHA inspections: 3 · Violations cited: 5COTERRA ENERGY, INC., OSHA inspections: 3 · Violations cited: 0MCCONNELL AND SCULLY…, OSHA inspections: 3 · Violations cited: 7HALLIBURTON ENERGY S…, OSHA inspections: 3 · Violations cited: 1WILLIAMS PRODUCTION …, OSHA inspections: 3 · Violations cited: 0CHOSEN CONSTRUCTION,…, OSHA inspections: 3 · Violations cited: 9HAROLD MACQUINN, INC., OSHA inspections: 3 · Violations cited: 7BOND CRUSHED CONCRETE, OSHA inspections: 3 · Violations cited: 8RTO SALES AND LEASIN…, OSHA inspections: 3 · Violations cited: 3AMERICAN BENTONITE I…, OSHA inspections: 3 · Violations cited: 3PETTA ENTERPRISES, LLC, OSHA inspections: 3 · Violations cited: 12EXTRACTION OIL & GAS…, OSHA inspections: 3 · Violations cited: 2ANADARKO PETROLEUM C…, OSHA inspections: 3 · Violations cited: 3PDC ENERGY, INC., OSHA inspections: 3 · Violations cited: 2MT CARMEL COGEN, INC, OSHA inspections: 3 · Violations cited: 4LATSHAW DRILLING COM…, OSHA inspections: 3 · Violations cited: 3AKITA DRILLING USA C…, OSHA inspections: 3 · Violations cited: 10TANMAR COMPANIES, L.…, OSHA inspections: 3 · Violations cited: 5KEY ENERGY SERVICES,…, OSHA inspections: 3 · Violations cited: 0EOG RESOURCES, INC, OSHA inspections: 3 · Violations cited: 0Zebroski INC DBA Qua…, OSHA inspections: 3 · Violations cited: 2
Zebroski INC DBA Quarry Stone has 3 OSHA inspections on record and 2 violations cited. The crosshair marks the median among these Mining, Quarrying, Oil & Gas peers. Across this sector's tracked employers, more inspections is moderately associated with more violations found -- not a coincidence, but not a guarantee either.

Zebroski INC DBA Quarry Stone in the Mining, Quarrying, Oil & Gas enforcement ledger

In Mining, Quarrying, Oil & Gas, Zebroski INC DBA Quarry Stone sits at penalty rank #1,091 of 1,117 penalized establishments ($125 assessed).

How Zebroski INC DBA Quarry Stone Compares

Zebroski INC DBA Quarry Stone's 0.67 violations per inspection compares to the Mining, Quarrying, Oil & Gas sector average of 3.1 violations per employer.

Against the Mining, Quarrying, Oil & Gas industry average of $4,539 per employer, this employer's current OSHA penalty runs well below peers (0.03x the sector average).

Enforcement detail

OSHA Inspection History

Total Inspections

3

First Inspection

2010-08-17

Last Inspection

2013-05-02

Inspection Span

3 yrs

Violations / Inspection

0.7

Avg Penalty / Inspection

$42

Industry Avg / Inspection

$2,042

What this shows 3 inspections over 3 years, averaging 0.7 violations per visit. That's $42 per inspection vs. the Mining, Quarrying, Oil & Gas average of $2,042.

Enforcement detail

Violation Breakdown

0

Serious

0.0% of total

0

Willful

0.0% of total

0

Repeat

0.0% of total

2

Other-Than-Serious

100.0% of total

What this shows Serious violations involve hazards that could cause death or serious physical harm. Willful violations indicate intentional or knowing disregard of the law. Repeat violations are for hazards previously cited within the past 5 years.

Enforcement detail

Penalty Analysis

Initial Penalty Assessed

$125

Current Penalty Amount

$125

Penalty Reduction

None

What this shows No reduction on record. The current penalty matches the original OSHA assessment.

Industry Safety Context: Mining, Quarrying, Oil & Gas

How Zebroski INC DBA Quarry Stone compares to the Mining, Quarrying, Oil & Gas sector, which has 2,294 employers tracked by PlainWorker.

Metric Zebroski INC DBA Quarry Stone Industry Avg
Inspections 3 2.2
Violations 2 3.1
Total Penalty $125 $4,539
Avg Penalty per Inspection $42 $2,042
View all 2,294 employers in Mining, Quarrying, Oil & Gas →

Nationwide Mining, Quarrying, Oil & Gas peers with similar penalties or inspection counts

Two OSHA-record peer sets for Zebroski INC DBA Quarry Stone, both outside CA so the neighborhoods are not geographic containment.

Similar current OSHA penalty

Nearest same-sector employers by current assessed penalty ($125 here).

Blaise Energy $153 ND Cannon Electric $160 MI Lone Star Northwest INC $200 WA Lenz Enterprises INC $200 WA

Similar OSHA inspection count

Same-sector employers with a comparable inspection history outside this state (3 inspections here).

Frontier Drilling LLC 3 insp. Clarksburg, WV Coterra Energy, INC. 3 insp. Kent, TX McConnell and Scully INC 3 insp. Homer, MI Halliburton Energy Services 3 insp. Pecos, TX

Nearby & Similar Employers in Mining, Quarrying, Oil & Gas

Showing 5 of 2293 other employers tracked in this sector.

Double D Mining, LLC
Blythe, CA
5 inspections $125
Upland Rock INC
Mentone, CA
5 inspections $130
Frank B Marks & Son INC
Newman, CA
7 inspections $135
C Smith Corporation
Corona, CA
2 inspections $110
Coronet Concrete Products, INC.
Thousand Palms, CA
3 inspections $110

Compare Zebroski INC DBA Quarry Stone vs Double D Mining, LLC side-by-side →

What to do with this record

Use Zebroski INC DBA Quarry Stone's enforcement history as one data point, not the whole picture.

  • A single employer's record can look unusual in isolation. Compare Zebroski INC DBA Quarry Stone against Double D Mining, LLC, a similarly-sized employer in the same sector, before drawing conclusions. Compare side-by-side
  • See whether Zebroski INC DBA Quarry Stone's inspection and penalty record is typical for Mining, Quarrying, Oil & Gas or an outlier against the sector's own average. View the Mining, Quarrying, Oil & Gas sector
  • Before you accept a job or raise a safety concern, search any employer for its own OSHA inspection history the same way you found this one. Search employers

Figures reflect closed OSHA and WHD federal enforcement actions on record (2010–2026); not every workplace issue results in an inspection or investigation.

Frequently Asked Questions

Is Zebroski INC DBA Quarry Stone safe to work at? ▼
Based on OSHA records, Zebroski INC DBA Quarry Stone's workplace safety record is relatively clean, with fewer violations than typical. The employer has 2 violations across 3 inspections. Compared to Mining, Quarrying, Oil & Gas industry peers, this is below average for penalties. Review the full inspection history below for details.
How many OSHA violations does Zebroski INC DBA Quarry Stone have? ▼
Zebroski INC DBA Quarry Stone has 2 OSHA violations on record, including 0 serious, 0 willful, and 0 repeat violations. The total current penalty amount is $125.
How many OSHA inspections has Zebroski INC DBA Quarry Stone had? ▼
Zebroski INC DBA Quarry Stone has had 3 OSHA inspections, with the first recorded on 2010-08-17 and the most recent on 2013-05-02. This averages 0.7 violations per inspection.
What is the total penalty amount for Zebroski INC DBA Quarry Stone? ▼
Zebroski INC DBA Quarry Stone has been assessed $125 in current OSHA penalties.
What industry does Zebroski INC DBA Quarry Stone operate in? ▼
Zebroski INC DBA Quarry Stone operates in the Mining, Quarrying, Oil & Gas sector (NAICS code 212321). This industry has 2,294 employers tracked by PlainWorker, with 5,098 total OSHA inspections and $10.41M in cumulative penalties.
Where does Zebroski INC DBA Quarry Stone rank nationally on OSHA penalties? ▼
Among the 99,447 U.S. employers with a nonzero current OSHA penalty in PlainWorker's corpus, Zebroski INC DBA Quarry Stone ranks #98,495 (the lower half of penalized employers nationally). The ordinal is a live COUNT of employers with a lower total_current_penalty; see the methodology page for the exact derivation.
How does Zebroski INC DBA Quarry Stone's safety record compare to industry average? ▼
Zebroski INC DBA Quarry Stone's total OSHA penalty of $125 is below the Mining, Quarrying, Oil & Gas industry average of $4,539 per employer. The employer has 3 inspections compared to the industry average of 2.2 per employer. For a direct comparison, Frank B Marks & Son INC in Newman, CA is a similar mining, quarrying, oil & gas employer with $135 in current penalties.
Data Sources & Methodology ▼

Data as of 2026. Source: U.S. Department of Labor (OSHA, WHD).

Source: OSHA Enforcement Data

Inspection and violation records from the Occupational Safety and Health Administration (OSHA), U.S. Department of Labor, covering the period 2010–2026. Includes inspection dates, violation types (serious, willful, repeat, other-than-serious), and penalty amounts. Penalties shown are current assessed amounts and may differ from original citations due to settlement, contest, or reduction.

Source: Wage and Hour Division (WHD)

Compliance actions from the WHD, covering enforcement of the Fair Labor Standards Act (FLSA), including minimum wage, overtime, and child labor violations. Back wages represent amounts owed to affected employees as determined by WHD investigations.

Employer Matching

Employers are matched across OSHA and WHD datasets by name, state, and city. Employers included in PlainWorker have 2 or more OSHA inspections or $1,000+ in WHD back wages. Data is updated monthly from data.dol.gov.

Verify with OSHA establishment search →

Every figure on PlainWorker is rendered directly from official U.S. Department of Labor OSHA and Wage & Hour Division enforcement records, no number is typed in by an editor. This employer's ratios (penalty-per-violation, industry comparisons) are computed live from the 3 inspections on record. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026.