Fleet typeIdentity
Small fleet
56 power units. Brokers price each fleet type apart.
Carrier profile · USDOT 4013855 · MC-1512057
G4 TANK LINES LLC
56 power unitsavg 13.1 yrRegional · 7 statesDENVER, CO
CARRIER ACTIVEMC-1512057 ACTIVEHAZMAT
Observed fleet · trailing 24 mo daily
56Power units
30 observed · MCS-150
27Trailers seen
Decoded · vPIC
13.1Avg age (yr)
1997–2026 · vPIC
Click to see how we scored it
Load decision · FMCSA snapshot · 2026-06-13
Clear to load
Active authority and a clean federal record. No blocking issues found.
Active operating authorityInsurance on file
Watch · 0
Nothing flagged.
In good standing · 4
Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 60 inspections.No reported crashesNo DOT-reportable crashes are on this carrier's record.
Operating authority33 yr active
since 2023Insurance (BIPD)On file
FMCSA L&IVehicle OOS · 24mo20.020.0 %
▼ 22.26% nat'lCrashes · fatal00
clean 24 moVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersOlder
13.1 yr
Model years 1997–2026 · peer benchmark computing.
Identity stabilityStable
3 yr unchanged
Same registration since 2023 — no chameleon / reincarnation signal.
AI readFull read
Is G4 TANK LINES LLC safe to work with?
Is G4 TANK LINES LLC safe to load? G4 TANK LINES LLC (USDOT 4013855, MC-1512057) is an active small-fleet motor carrier based in DENVER, CO, operating 56 power units and 55 drivers. Operating authority has been active 3 years (past the 24-month broker-confidence threshold). Across 60 roadside inspections, its vehicle out-of-service rate is 20.0% (below the 22.26% national average), with 0 reportable crashes in the last 24 months. FMCSA has not assigned a safety rating. Vektor rates it clear to load (100/100). Source: FMCSA SAFER/MCMIS, last updated 2026-06-13.
FMCSA fields + Vektor analysis · updated 2026-06-13
GTG4 TANK LINES LLC 100
01
Safety
60 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
Vehicle OOS 20.0% (24-mo)40 veh insp · 24-mo · nat'l 22.26%
050%nat'l 22.26%
Driver OOS 2.1% (24-mo)47 drv insp · 24-mo · nat'l 6.67%
030%nat'l 6.67%
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
17.6% now▲ Worsening
Inspection coverage· expected vs observed · the fraud signal
Inspection coverage
How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.4 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 56-unit fleet — enough signal to read the safety record, though not a heavy sample.
- Registered power units
- 56
- Inspections · 24 mo
- 47
- Annualized
- ≈24 / yr
- Coverage
- ≈0.4 inspections / unit · yr
Violation themes· decoded · grouped by BASIC
What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.
- 392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving16
- 393.45 Brake tubing / hose defectsVehicle Maintenance8
- 393.9 Inoperative required lampsVehicle Maintenance7
- 396.3 Inspection / repair / maintenance not performedVehicle Maintenance6 · 3 OOS
- 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance6 · 6 OOS
- 393.11 Required lamps/reflectors missingVehicle Maintenance5
- 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance5
- 172.328 Other violationOther5
- 395.24 ELD — record edits / dataHOS Compliance4
- 393.47 Brake actuators / linings / componentsVehicle Maintenance4 · 2 OOS
02
Authority & insurance
Can they legally + adequately haul your load?
Operating authority· 49 CFR · per type
Operating authority
- Common
- Active
- Contract
- None
- Broker
- None
Insurance & bonds
BIPD / liability (required)Filed with FMCSA
CargoNone
Surety bond (BMC-84)None
Insurance continuity· insurer · policy · lapses
No insurance filing history on record.
03
Equipment & fleet
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 56
- Observed power (24 mo)
- 30
- Trailers (towed)
- 27
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
1997
Oldest model yr
VINs decoded
04
Operations & lanes
Revealed by inspection density across 7 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Operating radiusRegional
revealedStates observed77
US statesInspections · 24 mo4747
TX busiestInspection density by state· each tile = a state · shade = inspections, last 24 mo
Home base
DENVER, CO
Top corridor
TX ⇄ CO
Density
fewermore
05
Network & fraud
Affiliated entities & reincarnation signals · for review, not a verdict
Last 12 months: 4 trucks also ran under 3 other carriers
VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 3144352USDOT 4103285USDOT 2120653Some overlap is legitimate (leased or sold equipment); review alongside the other signals.
Show all-time history (23 trucks · 15 carriers)
Across all inspections on record: USDOT 2120653USDOT 4103285USDOT 3518381USDOT 3841231USDOT 2876366USDOT 3075126USDOT 3144352USDOT 2427845
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)5656
Observed (24 mo)3030
Shared w/ other carriers2323
Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.
06
Identity & contact
FMCSA census + L&I dossier
Location
- Physical address
- 610 SOUTH LIPAN STREET, DENVER, CO, 80223
- Operation
- Interstate· Hazmat
Contact
- Phone
- (720) 210-8794
- Web domain
- g4tanklines.com
Registration
- Officer
- Guillermo Grossi-Roffi
- USDOT / docket
- 4013855 · MC-1512057
- First registered
- 01/18/2023
- Last MCS-150
- 04/16/2026 · 1,871,200 mi (2025)
- FMCSA safety rating
- Not rated
- Recordable crash rate
- 0.00
- D-U-N-S
- —
Fleet (self-reported · MCS-150)
07
Federal activity
Daily-captured FMCSA licensing & insurance changes — monitored by Vektor
Federal record activity· monitored daily by Vektor
No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.
08
Reviews
Verified broker, shipper & driver reviews — moderated
Performance ratings only — never the Vektor risk score
No verified reviews yet
Be the first broker or shipper to rate G4 TANK LINES LLC. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.
Leave a review09
Frequently asked
What is G4 TANK LINES LLC's USDOT number?
G4 TANK LINES LLC's USDOT number is 4013855, and its motor carrier number is MC-1512057.
Is G4 TANK LINES LLC authorized to operate?
As of 2026-06-13, G4 TANK LINES LLC is active in the FMCSA register with common, contract, broker operating authority on file.
What is G4 TANK LINES LLC's safety record?
G4 TANK LINES LLC has a 20.0% vehicle out-of-service rate (national average 22.26%) across 60 roadside inspections, with 0 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor's computed risk score is 100/100 (tier: clear).
How big is G4 TANK LINES LLC's fleet?
G4 TANK LINES LLC operates 56 power units and 55 drivers per its most recent MCS-150 filing.
Where is G4 TANK LINES LLC based?
G4 TANK LINES LLC is based in DENVER, CO, with roadside inspections recorded across 7 states.