Cornerstone Site Services Llc is an active intrastate hazmat carrier based in Round Rock, TX.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 5 | 1 | 0 |
| Tractors | 2 | 0 | 0 |
| Trailers | 5 | 0 | 0 |
| Total Power Units | 10 | ||
Distinct vehicles · 24 mo
vs 10 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 0% | 0% | Better than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 58% | 78% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 1 | — | 22.26% |
| Hazmat | 1 | 0 | 0.00% | 4.44% |
Where they run
Inspected in 1 state. Top state TX accounts for of activity.
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 9 | 0 | 1 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Jan 13, 2026 | TX | STRAIGHT TRUCK | 4 | 0 |
| Jun 30, 2025 | TX | STRAIGHT TRUCK | 4 | 1 |
| Apr 17, 2025 | TX | STRAIGHT TRUCK | 1 | 0 |
| Feb 14, 2025 | TX | STRAIGHT TRUCK | 1 | 0 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 0 | 0.00 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 4 | 5.11 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| Hazardous Materials Compliance |
| 1 |
| 0 |
| 0 |
| May 30, 2024 | TX | STRAIGHT TRUCK | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Jan 13, 2026 | 177817E | Shipping paper accessibility | Hazardous Materials Compliance | — |
| Jan 13, 2026 | 39378 | Wipers - Inoperative / missing / damaged wipers | Vehicle Maintenance | — |
| Jan 13, 2026 | 39379 | Defroster/Defogger - Inoperative or defective | Vehicle Maintenance | — |
| Jan 13, 2026 | 39395A | No/discharged/unsecured fire extinguisher | Vehicle Maintenance | — |
| Jun 30, 2025 | 393100A | No or improper load securement | Vehicle Maintenance | Yes |
| Jun 30, 2025 | 39311LR | No Lower rear retroreflective sheeting or reflex reflective materials as required for vehicles manufactured after December 1993 | Vehicle Maintenance | — |
| Jun 30, 2025 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |
| Jun 30, 2025 | 39617C | Operating a CMV without proof of a periodic inspection | Vehicle Maintenance | — |
| Apr 17, 2025 | 3965B | Oil and/or grease leak | Vehicle Maintenance | — |
| Feb 14, 2025 | 39617C | Operating a CMV without proof of a periodic inspection | Vehicle Maintenance | — |