Carrier profile · USDOT 693501 · MC-924851 · Updated Jul 26, 2026

ENVIRONMENTAL MAINTENANCE SERVICES INC

DBA BIOSERV

17 power unitsavg 6.1 yrRegional · 4 statesPROSPECT, CT100/100

CARRIER ACTIVEMC-924851 ACTIVERATED SATISFACTORYHAZMAT

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 8.3%24-mo cumulative

050%nat'l 22.26%

Driver OOS 5.6%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 12 vehicle and 18 driver inspections over 24 months.

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

0.0% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 10.7 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

18 inspections in the charted months · busiest month Apr '25 · 3

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.

Expected band

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.5 / unit·yr

thin signalabundant signal

Roadside-inspection volume is about what you'd expect for a 17-unit fleet — enough signal to read the safety record, though not a heavy sample.

Registered power units: 17
Inspections · 24 mo: 18
Annualized: ≈9 / yr
Coverage: ≈0.5 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

15%

Unsafe Driving

Vektor peer est.

11%

Hours-of-Service

Vektor peer est.

22%

Driver Fitness

Vektor peer est.

Controlled Substances

0violations

clean · per-BASIC

33%

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.

393.9 Inoperative required lampsVehicle Maintenance7 · 0 OOS
392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving6 · 0 OOS
395.8 Record of duty status (log / ELD) not current or missingHOS Compliance3 · 0 OOS
393.78 Windshield wipersVehicle Maintenance2 · 0 OOS
391.41 No / expired medical certificateDriver Fitness2 · 1 OOS
396.3 Inspection / repair / maintenance not performedVehicle Maintenance1 · 0 OOS
393.25 Lighting device requirementsVehicle Maintenance1 · 0 OOS
393.41 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 1 OOS
393.45 Brake tubing / hose defectsVehicle Maintenance1 · 0 OOS

ELD & hours-of-service

3 hours-of-service / ELD violations on record · most recent Apr 15, 2026. FMCSA does not publish the ELD device brand; these are the carrier's logging-compliance signals.

0ELD device issues

3No log / no ELD

0False logs

0Drove over hours

Crash history· 2 total · 0 in 24 mo

Total crashes

In last 24 mo

Fatal

Injury

Year		Crashes	Fatal	Injury	Tow
2018		1	0	0	1
2005		1	0	0	1

Date	State	Fatalities	Injuries	Tow-away
Feb 9, 2018	NY	0	0	Yes
Nov 7, 2005	CT	0	0	Yes