Carrierintel
GT

G4 TANK LINES LLC

Carrierintel Safety Score: 72/100. 50 inspection violations in 12 months. Last inspected Oct 2026.

DOT 4013855MC 1512057ActiveMotor CarrierInterstateGreat West Casualty CoDENVER, CO

COMPANY

Authority since
2023-06-14
MCS-150
2026-04-16 · 1,871,200 mi (2025)
Fleet
56 units · 67 trailers · 55 drivers
Annual mileage (VMT)
1,871,200 mi (2025)

ADDRESS

Physical
610 SOUTH LIPAN STREET
DENVER, CO 80223
Mailing
Same as physical

CONTACT

Phone
7202108794
Email
ggrossi@g4tanklines.com

OFFICERS

Primary Officer
GUILLERMO GROSSI-ROFFI
Title
PRESIDENT

OPERATION & CARGO

Operation classification
Authorized For Hire
Specialty
Tanker / Bulk Liquids
Cargo types
2
Liquids / GasesCommodities Dry Bulk
Self-reported by the company on its latest MCS-150 filing (FMCSA census). Reflects what the carrier is authorized and equipped to haul, not actual recent loads. Specialty is our summary of the declared cargo mix.
AUTHORITY
40 mo
Active authority
INSURANCE
1 active
Great West Casualty Co
RISK GRADE
Moderate Risk
2 risk factors · 4 strengths
OOS RATE
16.4%
12 / 73 inspections

Carrierintel Safety Score

Rolling 12-month heuristic based on inspections, OOS, violations, crashes & fatalities. Not the official FMCSA SMS score.

72
out of 100
Good
Markers: OOS inspection Crash Fatality

Fleet vs Reality

last 12 months · power-unit VINs from roadside inspections
Declared (MCS-150)
56 power units
Unique power units seen
28
+ 24 trailer VINs
+ 3 unclassified VINs
Inspections
41
Discrepancy
0.5x

Moderate Risk

2 risk factors · 4 strengths · 6 data points

SAFETY PERFORMANCE

Crash Record
1 crashes · 0 fatal · 1 with injuries · 1 tow-away
Clean Inspection Rate
84% — 61 clean of 73 inspections
Out-of-Service Rate
16.4% — driver OOS 1 insp., vehicle OOS 11 insp.

COMPLIANCE & AUTHORITY

USDOT Registration
Status: Active
Operating Authority
Active: Motor Carrier
Out-of-service orders
None on record
Authority Events
3 historical event(s) on file
MCS-150 Filing
Last filed 2026-04-16

INSURANCE

Active Coverage
1 policy(ies) on file · total max coverage $1,000,000

SUMMARY

Elevated OOS rate 15% (last 24 mo)
1.8 violations per inspection
Low crash rate (0.9 per 100 trucks/yr)
84% clean inspections
Active insurance on file
Coverage $1.0M

INDUSTRY REPORTS

  • ELD Tampering — Carriers cited for ELD tampering under 49 CFR § 395.8(e), by carrier and state.
  • Top Violations — The ten most-cited FMCSA violation codes of the last 30 days.
  • Phantom Fleets — Declared power units against the vehicles seen at roadside inspections.
  • English Proficiency — Carriers whose drivers were cited under 49 CFR § 391.11(b)(2), by carrier and state.
  • Methodology — Where the data comes from and how the Safety Score and Risk Grade are built.

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