Fleet typeIdentity
Asset-based
161 power units. Brokers price each fleet type apart.
Carrier profile · USDOT 229047 · MC-197435
WILLIAMS TANK LINES LLC
DBA WILLIAMS TANK LINES
161 power unitsavg 8.1 yrRegional · 5 statesSTOCKTON, CA
CARRIER ACTIVEMC-197435 ACTIVERATED SATISFACTORYHAZMAT
Observed fleet · trailing 24 mo daily
161Power units
139 observed · MCS-150
145Trailers seen
Decoded · vPIC
8.1Avg age (yr)
1997–2026 · vPIC
Click to see how we scored it
Load decision · FMCSA snapshot · 2026-06-15
Clear to load
Active authority and a clean federal record. No blocking issues found.
Active operating authorityInsurance on fileFatal crash on record
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.Established 43 yearsOperating authority has been on file since 1983.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 1210 inspections.
Operating authority4343 yr active
since 1983Insurance (BIPD)On file
FMCSA L&IVehicle OOS · 24mo6.26.2 %
▼ 22.26% nat'lCrashes · fatal1414
17 in 24moVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersTypical
8.1 yr
Model years 1997–2026 · peer benchmark computing.
Identity stabilityStable
43 yr unchanged
Same registration since 1983 — no chameleon / reincarnation signal.
AI readFull read
Is WILLIAMS TANK LINES LLC safe to work with?
Is WILLIAMS TANK LINES LLC safe to load? WILLIAMS TANK LINES LLC (USDOT 229047, MC-197435) is an active asset-based motor carrier based in STOCKTON, CA, operating 161 power units and 347 drivers. Operating authority has been active 43 years (past the 24-month broker-confidence threshold). Across 1,210 roadside inspections, its vehicle out-of-service rate is 6.2% (below the 22.26% national average), with 17 reportable crashes in the last 24 months. FMCSA rates it Satisfactory. Vektor rates it clear to load (88/100), with the leading concern: fatal crash on record. Source: FMCSA SAFER/MCMIS, last updated 2026-06-15.
FMCSA fields + Vektor analysis · updated 2026-06-15
WTWILLIAMS TANK LINES LLC 88
01
Safety
1,210 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
Vehicle OOS 6.2% (24-mo)690 veh insp · 24-mo · nat'l 22.26%
050%nat'l 22.26%
Driver OOS 0.3% (24-mo)623 drv insp · 24-mo · nat'l 6.67%
030%nat'l 6.67%
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
3.8% now● Stable
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
≈2.2 / unit·yr
thin signalabundant signal
Among the more heavily-inspected carriers for its size — abundant roadside signal. Coverage isn't the question here; the out-of-service and crash record is.
- Registered power units
- 161
- Inspections · 24 mo
- 723
- Annualized
- ≈362 / yr
- Coverage
- ≈2.2 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 Driving100
- 393.45 Brake tubing / hose defectsVehicle Maintenance86 · 41 OOS
- 396.3 Inspection / repair / maintenance not performedVehicle Maintenance77 · 24 OOS
- 393.47 Brake actuators / linings / componentsVehicle Maintenance68 · 2 OOS
- 393.9 Inoperative required lampsVehicle Maintenance54 · 10 OOS
- 393.53 Automatic brake adjusters / indicatorsVehicle Maintenance47
- 393.55 Antilock brake system (ABS)Vehicle Maintenance34
- 396.5 Oil and/or grease leakVehicle Maintenance24 · 5 OOS
- 393.70 Coupling devices / fifth wheelVehicle Maintenance16 · 4 OOS
- 393.11 Required lamps/reflectors missingVehicle Maintenance14
02
Authority & insurance
Can they legally + adequately haul your load?
Operating authority· 49 CFR · per type
Operating authority
- Common
- None
- Contract
- Active
- Broker
- Active
Insurance & bonds
BIPD / liability (required)Filed with FMCSA
CargoNone
Surety bond (BMC-84)Filed with FMCSA
Insurance continuity· insurer · policy · lapses
$750k BIPD · 10 insurers · 1 lapseCoverage lapse
+8 earlier
National Liability · 02–05
Great West · 05–10
Pacific Financial · 10–13
National Interstate · 10–15
Pacific Financial · 13–23
National Interstate · 15–26
19942026
No BIPD policy is currently in force in the filing history. The authority record may still list one on file — request a COI to confirm current coverage.
14 insurer eras · collapsed from 25 filings
| Insurer | Period | Limit | Renewals |
|---|---|---|---|
| NATIONAL INTERSTATE INSURANCE COMPANY | Oct 2015 → Apr 2026 | $750k | 4 |
| PACIFIC FINANCIAL ASSOCIATION, INC. | Oct 2013 → May 2023 | $750k | 1 |
| PACIFIC FINANCIAL ASSOCIATION, INC. | Oct 2013 → Aug 2010 | $750k | 1 |
| NATIONAL INTERSTATE INSURANCE COMPANY | Oct 2010 → Oct 2015 | $750k | 2 |
| PACIFIC FINANCIAL ASSOCIATION, INC. | Aug 2010 → Oct 2013 | $750k | 1 |
| NATIONAL INTERSTATE INSURANCE COMPANY | Feb 2010 → Oct 2010 | $750k | 1 |
| GREAT WEST CASUALTY CO. | Feb 2005 → Feb 2010 | $750k | 2 |
| NATIONAL LIABILITY & FIRE INS CO. | Feb 2002 → Feb 2005 | $750k | 7 |
| GENERAL SECURITY INSURANCE COMPANY | Feb 2000 → Mar 2008 | $750k | 1 |
| AMERICAN INTERNATIONAL UNDERWRITERS INS.(AIU) | Feb 1997 → Feb 2000 | $750k | 1 |
| NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA | Feb 1997 → Feb 2002 | $750k | 1 |
| THE RELIANCE INSURANCE CO. | Feb 1996 → Feb 1997 | $750k | 1 |
| RELIANCE NATIONAL INDEMNITY COMPANY | Feb 1995 → Feb 1996 | $750k | 1 |
| RANGER INS. CO./FAIRMONT SPECIALTY INS. CO. | Feb 1994 → Feb 1995 | $750k | 1 |
03
Equipment & fleet
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 161
- Observed power (24 mo)
- 139
- Trailers (towed)
- 145
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 5 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Operating radiusRegional
revealedStates observed44
US statesInspections · 24 mo720720
CA busiestInspection density by state· each tile = a state · shade = inspections, last 24 mo
Home base
STOCKTON, CA
Top corridor
CA
Density
fewermore
05
Network & fraud
Affiliated entities & reincarnation signals · for review, not a verdict
Last 12 months: 2 trucks also ran under 2 other carriers
VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 3252063USDOT 931301Some overlap is legitimate (leased or sold equipment); review alongside the other signals.
Show all-time history (17 trucks · 13 carriers)
Across all inspections on record: USDOT 2203504USDOT 4093153USDOT 931301USDOT 154712USDOT 3373801USDOT 3252063USDOT 2920979USDOT 3324679
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)161161
Observed (24 mo)139139
Shared w/ other carriers1717
Registered and roadside-observed capacity are broadly consistent.
06
Identity & contact
FMCSA census + L&I dossier
Location
- Physical address
- 1477 TILLIE LEWIS DR, STOCKTON, CA, 95206-1130
- Mailing address
- 1477 TILLIE LEWIS DRIVE, STOCKTON, CA, 95206
- Operation
- Interstate· Hazmat
Contact
- Phone
- (209) 944-5613
- Fax
- (800) 417-8036
- Web domain
- williamstankline.com
Registration
- Officers
- Corrine Lill · Mark Lill
- USDOT / docket
- 229047 · MC-197435
- First registered
- 02/22/1983
- Last MCS-150
- 04/01/2025 · 13,000,000 mi (2024)
- FMCSA safety rating
- Satisfactory · 05/19/2014
- D-U-N-S
- 8139033
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 WILLIAMS 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 WILLIAMS TANK LINES LLC's USDOT number?
WILLIAMS TANK LINES LLC's USDOT number is 229047, and its motor carrier number is MC-197435.
Is WILLIAMS TANK LINES LLC authorized to operate?
As of 2026-06-15, WILLIAMS TANK LINES LLC is active in the FMCSA register with common, contract, broker operating authority on file.
What is WILLIAMS TANK LINES LLC's safety record?
WILLIAMS TANK LINES LLC has a 6.2% vehicle out-of-service rate (national average 22.26%) across 1,210 roadside inspections, with 17 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 88/100 (tier: clear).
How big is WILLIAMS TANK LINES LLC's fleet?
WILLIAMS TANK LINES LLC operates 161 power units and 347 drivers per its most recent MCS-150 filing.
Where is WILLIAMS TANK LINES LLC based?
WILLIAMS TANK LINES LLC is based in STOCKTON, CA, with roadside inspections recorded across 5 states.