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Employers › CA

Mining, Quarrying, Oil & Gas · King City, CA

WM. J. Clark Trucking Service, INC.

According to OSHA enforcement records (2010–2026), WM. J. Clark Trucking Service, INC. ranks #92,381 of 99,447 penalized U.S. employers by total current penalty, with a relatively clean safety record: 2 violations across 2 inspections.

Lower half by penalty0% serious
$520
OSHA penalties
2
Violations cited
2
OSHA inspections
#92,381
of 99,447 penalized employers

WM. J. Clark Trucking Service, INC. in King City, CA has been the subject of 2 OSHA workplace inspections and 2 citations since 2010, according to enforcement records from the U.S. Department of Labor. Total penalties assessed: $520. All enforcement data below is sourced from the DOL public enforcement databases at data.dol.gov.

The record in one line

OSHA has inspected WM. J. Clark Trucking Service, INC. 2 times over 1 year - more than twice a year on average. These inspections resulted in 2 violations, averaging 1.0 per inspection. According to OSHA enforcement records, its total current penalty ranks #92,381 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 sits roughly in line with peers (0.9x the sector average) on inspection frequency. For comparison, Reliable Well Service in Loco Hills, NM is another mining, quarrying, oil & gas employer with 2 OSHA inspections on record and $525 in current penalties.

1.0
violations per inspection
0.0%
of violations were serious
#92,381
of 99,447 penalized employers

Compliance score

C 75/100
  • C OSHA safety compliance: 2 violations across 2 OSHA inspections (1.0 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.

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How this employer compares on OSHA penalties

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

in penalties

What this shows WM. J. Clark Trucking Service, INC. runs well below peers (0.11x 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

$520 Top 7% most affordable more affordable than 93% 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 WM. J. Clark Trucking Service, INC..

Frequently inspected, many findingsRarely inspected, many findingsFrequently inspected, clean recordBelow median on both1.92.022.02.004.79.414.218.9OSHA inspectionsViolations citedPDC ENERGY INC, OSHA inspections: 2 · Violations cited: 4DC VACUUM, INC., OSHA inspections: 2 · Violations cited: 3NOMAC DRILLING, LLC, OSHA inspections: 2 · Violations cited: 3CHEHALIS SAND & GRAV…, OSHA inspections: 2 · Violations cited: 6UDELHOVEN OILFIELD S…, OSHA inspections: 2 · Violations cited: 0KINDER MORGAN PRODUC…, OSHA inspections: 2 · Violations cited: 0DCP MIDSTREAM, OSHA inspections: 2 · Violations cited: 0WILLIAMS PRODUCTION …, OSHA inspections: 2 · Violations cited: 0GULFPORT ENERGY INC., OSHA inspections: 2 · Violations cited: 1NEWPARK DRILLING FLU…, OSHA inspections: 2 · Violations cited: 4RELIANCE WELL SERVIC…, OSHA inspections: 2 · Violations cited: 1COTERRA ENERGY OPERA…, OSHA inspections: 2 · Violations cited: 0ANDERSON EXCAVATING,…, OSHA inspections: 2 · Violations cited: 0TRILOBITE TESTING INC, OSHA inspections: 2 · Violations cited: 0KC MIDSTREAM SOLUTIO…, OSHA inspections: 2 · Violations cited: 18MALLARD JV, INC. DBA…, OSHA inspections: 2 · Violations cited: 6SAXON DRILLING LP, OSHA inspections: 2 · Violations cited: 3EOG RESOURCES, INC., OSHA inspections: 2 · Violations cited: 0SECTION 37 LLC, OSHA inspections: 2 · Violations cited: 0LUNDERBY TRUCKING, OSHA inspections: 2 · Violations cited: 0WM. J. Clark Truckin…, OSHA inspections: 2 · Violations cited: 2
WM. J. Clark Trucking Service, INC. has 2 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.

WM. J. Clark Trucking Service, INC. in the Mining, Quarrying, Oil & Gas enforcement ledger

Among 1,117 Mining, Quarrying, Oil & Gas employers with OSHA penalties on file, WM. J. Clark Trucking Service, INC. ranks #927 at $520 current penalty.

How WM. J. Clark Trucking Service, INC. Compares

WM. J. Clark Trucking Service, INC.'s 1.00 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 (0.11x the sector average).

Enforcement detail

OSHA Inspection History

Total Inspections

2

First Inspection

2018-03-02

Last Inspection

2019-05-23

Inspection Span

1 yr

Violations / Inspection

1.0

Avg Penalty / Inspection

$260

Industry Avg / Inspection

$2,042

What this shows 2 inspections over 1 year, averaging 1.0 violations per visit. That's $260 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

$520

Current Penalty Amount

$520

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 WM. J. Clark Trucking Service, INC. compares to the Mining, Quarrying, Oil & Gas sector, which has 2,294 employers tracked by PlainWorker.

Metric WM. J. Clark Trucking Service, INC. Industry Avg
Inspections 2 2.2
Violations 2 3.1
Total Penalty $520 $4,539
Avg Penalty per Inspection $260 $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 WM. J. Clark Trucking Service, INC., both outside CA so the neighborhoods are not geographic containment.

Similar current OSHA penalty

Nearest same-sector employers by current assessed penalty ($520 here).

Stallion Oilfield Services $518 TX Chevron USA $523 TX Reliable Well Service $525 NM Waterfleet, LLC $534 TX

Similar OSHA inspection count

Same-sector employers with a comparable inspection history outside this state (2 inspections here).

PDC Energy INC 2 insp. Johnstown, CO DC Vacuum, INC. 2 insp. Alvin, TX Nomac Drilling, LLC 2 insp. Ingalls, KS Chehalis Sand & Gravel INC 2 insp. Chehalis, WA

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

Showing 5 of 2293 other employers tracked in this sector.

Stallion Oilfield Services
Pecos, TX
2 inspections $518
Chevron USA
Kent, TX
2 inspections $523
Hanson Aggregates INC
Newberry Springs, CA
3 inspections $525
Reliable Well Service
Loco Hills, NM
2 inspections $525
Robertson Ready Mix Holdings, LLC
Cabazon, CA
2 inspections $525

Compare WM. J. Clark Trucking Service, INC. vs Stallion Oilfield Services side-by-side →

What to do with this record

Use WM. J. Clark Trucking Service, INC.'s enforcement history as one data point, not the whole picture.

  • A single employer's record can look unusual in isolation. Compare WM. J. Clark Trucking Service, INC. against Stallion Oilfield Services, a similarly-sized employer in the same sector, before drawing conclusions. Compare side-by-side
  • See whether WM. J. Clark Trucking Service, INC.'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 WM. J. Clark Trucking Service, INC. safe to work at? ▼
Based on OSHA records, WM. J. Clark Trucking Service, INC.'s workplace safety record is relatively clean, with fewer violations than typical. The employer has 2 violations across 2 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 WM. J. Clark Trucking Service, INC. have? ▼
WM. J. Clark Trucking Service, INC. has 2 OSHA violations on record, including 0 serious, 0 willful, and 0 repeat violations. The total current penalty amount is $520.
How many OSHA inspections has WM. J. Clark Trucking Service, INC. had? ▼
WM. J. Clark Trucking Service, INC. has had 2 OSHA inspections, with the first recorded on 2018-03-02 and the most recent on 2019-05-23. This averages 1.0 violations per inspection.
What is the total penalty amount for WM. J. Clark Trucking Service, INC.? ▼
WM. J. Clark Trucking Service, INC. has been assessed $520 in current OSHA penalties.
What industry does WM. J. Clark Trucking Service, INC. operate in? ▼
WM. J. Clark Trucking Service, INC. 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 WM. J. Clark Trucking Service, INC. rank nationally on OSHA penalties? ▼
Among the 99,447 U.S. employers with a nonzero current OSHA penalty in PlainWorker's corpus, WM. J. Clark Trucking Service, INC. ranks #92,381 (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 WM. J. Clark Trucking Service, INC.'s safety record compare to industry average? ▼
WM. J. Clark Trucking Service, INC.'s total OSHA penalty of $520 is below the Mining, Quarrying, Oil & Gas industry average of $4,539 per employer. The employer has 2 inspections compared to the industry average of 2.2 per employer. For a direct comparison, Reliable Well Service in Loco Hills, NM is a similar mining, quarrying, oil & gas employer with $525 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 2 inspections on record. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026.