Carrier profile · USDOT 1811463 · Updated Jun 13, 2026

DIAMOND ENVIRONMENTAL SERVICES LP

319 power unitsavg 10.4 yrLocal · 1 statesSAN MARCOS, CA81/100
AUTHORITY STATUS UNKNOWN
Verified linksdiamondprovides.comFMCSA SAFER

Safety

Roadside out-of-service rates versus the national benchmark, inspection and crash trends, decoded violation themes, and ELD / hours-of-service integrity — the full safety picture behind the verdict.

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 25.0%24-mo cumulative
050%nat'l 22.26%
Driver OOS 5.5%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 44 vehicle and 55 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

42.9% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 3.6 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

52 inspections in the charted months · busiest month Jul '25 · 5

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

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.

Thin coverage
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.1 / unit·yr
thin signalabundant signal
Few roadside inspections for a 319-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.
Registered power units
319
Inspections · 24 mo
55
Annualized
≈28 / yr
Coverage
≈0.1 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

2%
Unsafe Driving
Vektor peer est.
Hours-of-Service
0violations
clean · per-BASIC
73%
Driver Fitness
Vektor peer est.
Controlled Substances
0violations
clean · per-BASIC
36%
Vehicle Maintenance
Vektor peer est.

Percentile = standing among same-exposure peers (higher = worse). FMCSA publishes percentiles for only some carriers (shown official); elsewhere we show a Vektor peer-percentile estimate, or the absolute SMS measure when there are too few inspections to rank.

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 Driving33 · 1 OOS
  • 393.9 Inoperative required lampsVehicle Maintenance13 · 0 OOS
  • 393.11 Required lamps/reflectors missingVehicle Maintenance9 · 0 OOS
  • 396.3 Inspection / repair / maintenance not performedVehicle Maintenance8 · 5 OOS
  • 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance5 · 0 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance4 · 2 OOS
  • 393.45 Brake tubing / hose defectsVehicle Maintenance4 · 2 OOS
  • 396.5 Oil and/or grease leakVehicle Maintenance4 · 0 OOS
  • 393.100 Cargo securement (general)Vehicle Maintenance2 · 2 OOS
  • 396.7 Unsafe operationVehicle Maintenance2 · 1 OOS

ELD & hours-of-service

No hours-of-service or ELD violations on record across 96 inspections — a clean logging history.

Crash history· 27 total · 2 in 24 mo

27
Total crashes
2
In last 24 mo
1
Fatal
13
Injury
YearCrashesFatalInjuryTow
20252101
20243013
20233023
20224024
20212012
20202012
20191011
20182002
20174033
20162012
20131001
20111011
DateStateFatalitiesInjuriesTow-away
May 15, 2025CA00Yes
Jan 23, 2025CA10No
Jun 21, 2024CA01Yes
Jan 29, 2024CA00Yes
Jan 28, 2024CA00Yes
May 15, 2023CA00Yes
Apr 17, 2023CA03Yes
Mar 21, 2023CA01Yes
Apr 19, 2022CA00Yes
Mar 2, 2022CA01Yes
Feb 14, 2022CA00Yes
Jan 31, 2022CA01Yes
Dec 11, 2021CA00Yes
Dec 4, 2021CA01Yes
Dec 3, 2020CA01Yes
Aug 13, 2020CA00Yes
Mar 4, 2019CA01Yes
Jun 18, 2018CA00Yes
Mar 23, 2018CA00Yes
Sep 7, 2017CA01Yes
Aug 3, 2017CA02Yes
May 23, 2017CA00Yes
Apr 18, 2017CA01No
Sep 7, 2016CA01Yes
Apr 25, 2016CA00Yes