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Authorized · PropertyUSDOT 4013855· MC1512057· CARRIER· EIN 92-1757756
⬇ PDF report

G4 TANK LINES LLC

610 SOUTH LIPAN STREET, DENVER, CO, 80223(720) 210-8794ggrossi@g4tanklines.comGUILLERMO GROSSI-ROFFI
Vetting snapshot
Authority
Active
revocation pending
Insurance
No active filing
$1M required — verify
Vehicle OOS
18.2%
below 22% national avg
Driver OOS
0%
below 6.7% national avg
Crashes 24mo
1
none fatal
Red flags
2 flags
see details below
33
/ 100

Risk factors

High riskVioCodes score
No active liability (BIPD) insurance filing on fileAuthority revocation pending1 crash in the last 24 months

A weighted read of the public FMCSA signals below — authority, insurance, out-of-service, crashes, roadside OOS rates, and carrier connections. A starting point for vetting, not a guarantee.

Authority & insurance

MC1512057

Operating authority and insurance on file — from FMCSA Licensing & Insurance (L&I).

Authority revocation pending Most recent liability (BIPD) filing ended 06/05/2026 (GUIDEONE MUTUAL INSURANCE COMPANY) — no active federal filing shown; verify current coverage
Common
Active
Contract
None
Broker
None
Authorized for: Property
Liability (BIPD)
No active filing
$1M required
Cargo
Not on file
not required
Bond / surety
Not on file
not required
Insurance filings
ENDED 06/05/2026Liability (BIPD) — BMC-91X$1M coverageeff 06/05/2023
GUIDEONE MUTUAL INSURANCE COMPANY· policy 62P101251
Authority history (1) ▾
06/14/2023MOTOR PROPERTY COMMON CARRIERGRANTED

Source: FMCSA Licensing & Insurance (L&I), public data. This shows the carrier’s federal insurance filings (BMC-91X liability, BMC-34 cargo) — the federally-required minimums on file for operating authority — not the carrier’s full commercial policy (its actual auto combined-single-limit, general liability, cargo, or workers’ comp, which appear on the carrier’s ACORD certificate of insurance). Always confirm current coverage with a COI from the carrier’s agent before making a vetting decision.

Roadside inspection performance

Out-of-service rate vs national average. Lower is better.

Vehicle44 inspections · 18.2% OOS · National 22%
Driver51 inspections · 0% OOS · National 6.7%

Crash record (US, last 24 months)

Total

1

Tow-away

1

Injury

2

Fatal

0

Company profile

FMCSA census

AUTHORIZED FOR HIRE

Power units
56
on file (MCS-150)
Drivers
55
55 hold a CDL
Annual mileage
1.9M mi
reported 2025
Recordable crash rate
0.00
per million miles
How far they run · drivers by operating lane
  • Interstate · <100 mi55 drivers
Company officer
GUILLERMO GROSSI-ROFFI
Operation
Interstate · Hazmat
Registered since
2023-01-18
Last MCS-150 update
2026-04-16
Census status
Active

Fleet: 56 trucks · 56 owned tractors · 67 owned trailers.

Source: FMCSA Company Census File (data.transportation.gov). Fleet and driver counts are self-reported on the carrier’s most recent MCS-150 filing.

Data change history

Every FMCSA record change we’ve detected — address, fleet size, contacts, MCS-150 — newest first.

Activity history

5 events
  1. 06/05/2026Insurance ended — GUIDEONE MUTUAL INSURANCE COMPANY

    policy 62P101251

  2. 04/16/2026MCS-150 update filed

    1.9M mi reported (2025)

  3. 06/14/2023MOTOR PROPERTY COMMON CARRIER — GRANTED
  4. 06/05/2023Insurance filed — GUIDEONE MUTUAL INSURANCE COMPANY

    Liability (BIPD) — BMC-91X · policy 62P101251

  5. 01/18/2023Registered with FMCSA

    AUTHORIZED FOR HIRE

Merged from FMCSA authority, insurance, out-of-service, and census records.

🚛

Operations

Classification

  • AUTHORIZED FOR HIRE

Area served

  • Interstate
★

FMCSA safety rating

Rating
Not rated
Type
Non-ratable review
Rated
—
Last review
2025-09-16
📄

MCS-150 registration

Form date
2026-04-16
Reported mileage
1,871,200 mi (2025)
⚡

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Data sourced from public FMCSA records via safer.fmcsa.dot.gov · Latest FMCSA update: Sep 2026 · Page refreshed: Sep 29, 2026, 8:46 AM. VioCodes is not affiliated with FMCSA. To dispute incorrect data, file a DataQs Request for Data Review.