WILLIAMS TANK LINES LLC is a large fleet motor carrier based in STOCKTON, California (USDOT #229047). As of 2026-09-16T00:36:08.093Z, it holds a Satisfactory FMCSA safety rating and a FileFlo Carrier Intelligence Score of 100/100 (Low Risk), based on 50 recent inspection(s) and 29 recorded violation(s) in public FMCSA data.
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100/100 Low Risk
| Category | Score | Max |
|---|---|---|
| Safety Rating | 30 | 30 |
| Inspection Pass Rate | 20 | 20 |
| Out-of-Service Rate (vs FMCSA national avg) | 15 | 15 |
| CSA BASIC percentiles | Not measured | n/a |
CIS subtotal normalizes 3 publicly-available FMCSA components (Safety Rating + Inspection Pass Rate + OOS Rate) to a 0-100 surface. CSA SMS BASIC percentiles are not published in FMCSA's public Socrata datasets and the SMS portal at ai.fmcsa.dot.gov is not crawlable at scale, so we surface a transparent "Not measured" rather than fabricate a score component. Carriers with a Compliance Review on record may have published BASIC data on the SAFER snapshot for that DOT.
WILLIAMS TANK LINES LLC is a large fleet operating out of STOCKTON, California with USDOT number 229047. The company operates 336 power units and holds a current FMCSA safety rating of Satisfactory. Based on our analysis of federal safety data, WILLIAMS TANK LINES LLC has a FileFlo Carrier Intelligence Score (CIS) of 100/100, classified as Low Risk.
WILLIAMS TANK LINES LLC has undergone 50 recorded DOT inspections. The vehicle out-of-service rate is 8.0%, which is below the national average of 20.72%, suggesting solid vehicle maintenance practices.
The public FMCSA record for WILLIAMS TANK LINES LLC carries 29 recorded violations, and the most recent inspection on file is dated 20260908. Across 50 recorded inspections, the record carries 0 driver out-of-service violations and 7 vehicle out-of-service violations.
A recorded violation is what an inspector wrote down at the roadside. It is not a penalty, and it is not an amount owed: FMCSA assesses civil penalties only after a compliance review classifies specific cited violations. The step that changes this record is the document behind each line, so the next move is to see which records an investigator would ask for and which of them exist today.
A CIS score of 100 places WILLIAMS TANK LINES LLC in the Low Risk category. This carrier demonstrates strong safety practices across inspections, maintenance, and driver compliance. Maintaining this score requires ongoing document tracking, timely medical card renewals, and consistent pre-trip inspections.
Motor carriers operating in California must comply with both federal FMCSA regulations and state-specific transportation requirements. The STOCKTON, CA corridor is monitored by FMCSA field offices and state highway patrol units conducting roadside inspections. Carriers based in STOCKTON should ensure driver qualification files, vehicle inspection reports, and hours-of-service records are current and audit-ready at all times.
WILLIAMS TANK LINES LLC falls under the Western Service Center for FMCSA field-office oversight (region code 09). Service-center territory drives which FMCSA Investigator team would conduct a new-entrant audit or compliance review if one is triggered for this carrier.
FileFlo helps California trucking companies automate compliance document tracking across 600+ document types, including CDL medical cards, annual vehicle inspections, drug & alcohol testing records, and driver training certifications.
WILLIAMS TANK LINES LLC is classified by FMCSA as an interstate carrier.
The carrier holds an Authorized For Hire classification, meaning it transports cargo or passengers for compensation under FMCSA operating authority and is subject to MC-number requirements at 49 CFR Part 365.
Business organization type: Corporation.
WILLIAMS TANK LINES LLC is flagged in FMCSA Census as a hazardous materials carrier (HM indicator: Y). Hazmat carriers are subject to additional regulations under 49 CFR Subchapter C, including HM-126 reporting, HM-232 security planning, and the Hazmat Cargo Tank Annual Inspection requirement (49 CFR 180.407). Hazmat violations carry their own, higher penalty schedule, separate from the general FMCSA schedule.
Operational range per MCS-150 filing: interstate within 100 miles (short-haul, 280 drivers); intrastate beyond 100 miles (67 drivers). The 100-mile boundary matters because drivers operating within a 100-air-mile radius qualify for the short-haul exception under 49 CFR 395.1(e)(1), which removes the requirement to maintain RODS for the day.
Self-reported MCS-150 annual mileage: 13,000,000 miles. MCS-150 mileage feeds the FMCSA SafeStat exposure denominator: drastically understated mileage can artificially inflate CSA BASIC percentile scores by reducing the per-mile exposure baseline. Updates are required every 24 months under 49 CFR 390.19.
Owned equipment per the FMCSA Census filing: 115 straight trucks, 46 tractors. Owned-vs-leased equipment matters for compliance documentation, owned trailers require the carrier to retain annual inspection certificates under 49 CFR 396.17, while leased trailers shift that documentation responsibility to the lease agreement.
The carrier reports 258 CDL-holding drivers on file. Each CDL driver must have a current Driver Qualification File (DQF) maintained per 49 CFR 391.51, including a Medical Examiner's Certificate, an annual MVR review, and a record of road-test results.
Intrastate driver count: 67. Intrastate drivers may be subject to state-specific CDL endorsement and hours-of-service variances depending on the state.
Primary cargo type per MCS-150: Petroleum Products. Cargo type drives which BASIC categories the carrier is monitored under (Hazmat Compliance applies only to HM-flagged carriers; Cargo-Related Crash applies broadly).
The FMCSA Motor Carrier Management Information System (MCMIS) crash dataset records 20 crash events involving WILLIAMS TANK LINES LLC in the available reporting window. Of these, 0 involved a fatality, 8 involved a reported injury, and 20 resulted in a tow-away. 20 events meet the federal-recordable threshold under 49 CFR 390.5 (fatality, injury treated away from the scene, OR tow-away of any vehicle).
Federal-recordable crashes feed the Crash Indicator BASIC in CSA: carriers above the intervention threshold are 7-10x more likely to be selected for a compliance review than peer carriers below the threshold. Insurance carriers also pull federal-recordable crash counts during quoting; a single recordable crash in a 24-month look-back can drive a 10-20% premium increase for owner-operators and small fleets.
Most recent recorded event: I-15 N/B, UNINCORPORATED, CA on 20260719.
Inspections cluster geographically across California (48), Nevada (1), Utah (1). The concentration in California is consistent with the carrier's primary lanes and tends to correlate with which state DOT inspector teams WILLIAMS TANK LINES LLC's drivers encounter most often at roadside checkpoints.
Across the 50 recorded inspections, WILLIAMS TANK LINES LLC's 8.0% vehicle out-of-service rate sits well below the FMCSA 2024 national average of 20.72%. The 0.0% driver out-of-service rate sits materially below the 2024 national average of 5.51%. Vehicle OOS-rate variance is the strongest predictor of Vehicle Maintenance BASIC scores in CSA; driver OOS-rate variance is the strongest predictor of Hours-of-Service Compliance + Driver Fitness BASIC scores.
FMCSA's intervention thresholds (the percentile bands that trigger investigator outreach) are roughly 65th percentile for non-passenger non-hazmat carriers (75th for hazmat, 70th for passenger) on each BASIC. Carriers that consistently sit above the national average across multiple BASICs accumulate intervention risk faster than carriers with mixed performance. A single high BASIC alone rarely triggers enforcement; sustained over-threshold performance does.
Your last out-of-service was 10 days ago.
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| Date | State | Driver OOS | Vehicle OOS |
|---|---|---|---|
| 20260908 | CA | 0 | 0 |
| 20260906 | CA | 0 | 1 |
| 20260906 | CA | 0 | 0 |
| 20260905 | CA | 0 | 0 |
| 20260905 | CA | 0 | 0 |
| 20260904 | CA | 0 | 0 |
| 20260903 | CA | 0 | 0 |
| 20260828 | CA | 0 | 0 |
| 20260825 | CA | 0 | 0 |
| 20260825 | CA | 0 | 1 |
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WILLIAMS TANK LINES LLC (USDOT #229047) holds a "Satisfactory" FMCSA safety rating. FileFlo's Carrier Intelligence Score for the carrier is 100/100 (Low Risk), derived from its safety rating, inspection pass rate, and out-of-service rate versus the FMCSA national average.
Per its most recent FMCSA MCS-150 filing, WILLIAMS TANK LINES LLC operates 336 power unit(s) and 0 driver(s), classifying it as a large fleet. Fleet counts are self-reported to FMCSA and can lag a carrier's current operation.
WILLIAMS TANK LINES LLC is registered with the FMCSA at a physical address in STOCKTON, California, under USDOT number 229047.
FileFlo shows 50 recent DOT inspection(s) and 29 recorded violation(s) for WILLIAMS TANK LINES LLC (USDOT #229047), sourced from FMCSA public records and the Socrata transportation datasets. The inspection table on this page lists dates, states, and out-of-service counts.
WILLIAMS TANK LINES LLC scores 100/100 (Low Risk) on FileFlo's Carrier Intelligence Score. The score normalizes three public FMCSA components (safety rating, inspection pass rate, and out-of-service rate versus the national average) into one 0-100 surface. CSA SMS BASIC percentiles are not published in FMCSA's public data and are excluded rather than estimated.
The 49 CFR sections a DOT compliance review actually checks, plain-English:
Compliance terms: CSA score · out-of-service order · hours of service · driver qualification file. See DOT compliance software & document management →
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Data sourced from FMCSA public records and the Socrata transportation dataset. Last updated: 2026-09-16T00:36:08.093Z. Information may not reflect the carrier's current status. Dispute this record · Claim this profile