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G4 TANK LINES LLC

DOT 4013855MC 1512057ActiveInterstateGUIDEONE MUTUAL INSURANCE COMPANYDENVER, 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)
Owner origin
Western-northern-european
Origin candidates
French 50%

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
Origin
Western-northern-european

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
39 mo
Active authority
INSURANCE
1 active
GUIDEONE MUTUAL INSURANCE COMPANY
RISK GRADE
Moderate Risk
2 risk factors · 4 strengths
OOS RATE
16.4%
11 / 67 inspections

Fleet vs Reality

last 12 months · power-unit VINs from roadside inspections
Checking local VIN index…

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% — 56 clean of 67 inspections
Out-of-Service Rate
16.4% — driver OOS 1, vehicle OOS 10

COMPLIANCE & AUTHORITY

Operating Authority
Active operating authority on file
Authority Events
1 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

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