TruckCodex

WAC LLC

USDOT 2532126 • DBA: STAMBACK SEPTIC SERVICE • 1111 E MALEY STREET, WILLCOX, AZ, 85643

ACTIVE
Authority:None on file
Insurance:None on file
BOC-3:Not on file
Safety Rating:Not rated
MCS-150:Never updated
OOS Orders:None

Overview

Company profile from FMCSA Census File

USDOT
2,532,126
Status
ACTIVE
Operation
Intrastate (Non-Hazmat)
State
Arizona
Phone
5203844803
Email
[email protected]
Power Units (MCS-150)
32
Drivers (MCS-150)
32
MCS-150 Mileage
625,000
Physical Address
1111 E MALEY STREET, WILLCOX, AZ, 85643
Mailing Address
PO BOX 1144, WILLCOX, AZ, 85644
Contact
Phone: 5203844803

Risk Signals2 flagged

MEDIUM
Elevated vehicle OOS rate: 36.0%
National average is 23.4%. This carrier's vehicle OOS rate is 12.6 percentage points above average.
HIGH
1 fatal crash in last 24 months
1 total fatality. See crash history below.

Signals are auto-detected from FMCSA public records. This is not a regulatory determination.

Authority & Insurance

Operating authority, insurance filings, and BOC-3 status

Active Authority
0
Revoked / Inactive
0
Authority Types
0
Insurance Policies
None on file
BOC-3 Filing
Not on file

Operating Authority

fmcsa-authhistApr 5, 2026
No records found

No insurance filings found for this carrier in FMCSA records.

Check FMCSA SAFER for current insurance status

Safety & Inspections

SMS BASIC scores, inspection history, and out-of-service rates

SMS BASIC Scores

Driver Fitness
N/A
Drugs / Alcohol
0%
Hours of Service
N/A
Unsafe Driving
0%
Vehicle Maintenance
12%

Higher percentile = worse safety performance relative to peers. Scores at or above 75% trigger FMCSA alerts.

Inspections
25
Violations
99
11 OOS
Vehicle OOS %
36.0%
Above nat'l avg (23.4%)
Driver OOS %
4.0%
Power Units (MCS-150)
32
Drivers (MCS-150)
32
Crash Records
2

Inspection Activity (24 months)

Monthly inspection counts with OOS months highlighted. Hover bars for details.

May
1
Jun
2
Jul
1
Aug
1
Sep
Oct
1
Nov
1
Dec
1
Jan
Feb
Mar
1
Apr
May
1
Jun
Jul
1
Aug
Sep
1
Oct
Nov
Dec
Jan
Feb
1
Mar
Apr
Clean monthMonth with OOSBased on latest 25 of 25 inspection records

Inspection Activity Map

1 state • 25 inspections

🚛
None Low Medium High🚛 Home base

Violation Summary (99 violations from 25 inspections)

fmcsa-inspection-file
Violation Summary (99 violations from 25 inspections)
CodeDescription# Violations# OOSSeverity WtBASIC
FMCSR:393.9(a)Inoperable required lamps913Vehicle Maintenance
FMCSR:392.2Operating a CMV while ill or fatigued808Unsafe Driving
FMCSR:396.17(c)No proof of periodic inspection603Vehicle Maintenance
FMCSR:393.78A-WSWindshield condition defective504Vehicle Maintenance
FMCSR:396.17C-PINo proof of periodic inspection403Vehicle Maintenance
FMCSR:393.9A-LILInoperable required lamps303Vehicle Maintenance
FMCSR:393.11(a)(1)Lighting devices/reflectors303Vehicle Maintenance
FMCSR:393.78(a)Windshield condition defective304Vehicle Maintenance
FMCSR:393.78Windshield condition defective304Vehicle Maintenance
FMCSR:392.2-SLLTCDOperating a CMV while ill or fatigued208Unsafe Driving
FMCSR:393.55D1-BCoupling device/towing methods defective208Vehicle Maintenance
FMCSR:392.2-SLLMFOperating a CMV while ill or fatigued208Unsafe Driving
FMCSR:393.134B-CRHLCCargo securement - large boulders227Vehicle Maintenance
FMCSR:393.48(a)Inoperative/defective brakes218Vehicle Maintenance
FMCSR:393.45(d)Brake tubing/hoses inadequate207Vehicle Maintenance
FMCSR:393.134(b)Cargo securement - large boulders227Vehicle Maintenance
FMCSR:390.21T(b)(1)390.21T(b)(1)20—General/Admin
FMCSR:393.45(b)(2)Brake tubing/hoses inadequate207Vehicle Maintenance
FMCSR:393.134(b)(3)Cargo securement - large boulders227Vehicle Maintenance
FMCSR:393.95(a)Emergency equipment - fire extinguisher missing/defective205Vehicle Maintenance
FMCSR:393.9A-LBLInoperable required lamps103Vehicle Maintenance
FMCSR:393.9A-LFTSIInoperable required lamps103Vehicle Maintenance
FMCSR:393.9A-LLPLInoperable required lamps103Vehicle Maintenance
FMCSR:393.11A1-CSLRRLighting devices/reflectors103Vehicle Maintenance
FMCSR:393.9B-LILLighting - Identification lamp(s) obscured10—Vehicle Maintenance
FMCSR:390.21TB1-MC390.21TB1-MC10—General/Admin
FMCSR:392.22A-DEmergency warning devices not displayed104Vehicle Maintenance
FMCSR:392.22B-DFPWDDriver - Failed to place warning devices on the road surface10—Unsafe Driving
FMCSR:393.11A1-LRRLighting devices/reflectors103Vehicle Maintenance
FMCSR:393.60(c)Glazing/window obstructions104Vehicle Maintenance
FMCSR:393.79Defroster/Defogger - Inoperative or defective10—Vehicle Maintenance
FMCSR:393.95(a)(1)Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.10—Vehicle Maintenance
FMCSR:393.95(g)Emergency Equipment (HM) - Improper warning devices for hazardous material loads.10—Vehicle Maintenance
FMCSR:392.16-DFailing to use seat belt (49 CFR)103Unsafe Driving
FMCSR:393.9A-LSMLInoperable required lamps103Vehicle Maintenance
FMCSR:393.205C-WRAWFLMIBWheel/Rim - Any wheel fasteners loose/missing/ineffective/broken.10—Vehicle Maintenance
FMCSR:393.9A-LHLIInoperable required lamps103Vehicle Maintenance
FMCSR:393.9A-LCLInoperable required lamps103Vehicle Maintenance
FMCSR:392.2-SLLOperating a CMV while ill or fatigued108Unsafe Driving
FMCSR:393.203E-CBPCab and Body Parts - Cab front bumper missing/not secured/protruding10—Vehicle Maintenance
FMCSR:393.9B-LRRLighting - Reflex reflector(s) obscured10—Vehicle Maintenance
FMCSR:396.5B-LFuel system leak107Vehicle Maintenance
FMCSR:392.9(a)Operating without proper operating authority118General/Admin
FMCSR:390.17390.1710—General/Admin
FMCSR:392.16(a)Failing to use seat belt (49 CFR)103Unsafe Driving
FMCSR:393.205(c)Wheel fasteners loose and/or missing10—Vehicle Maintenance
FMCSR:383.23(a)(2)CDL - wrong class118Driver Fitness
FMCSR:390.21T(a)390.21T(a)10—General/Admin
FMCSR:391.41(a)(1)391.41(a)(1)10—Driver Fitness
FMCSR:393.95(f)Emergency Equipment - Stopped vehicle warning devices missing or improper10—Vehicle Maintenance
FMCSR:393.43Brake - relay emergency valve117Vehicle Maintenance
FMCSR:393.60(d)Glazing/window obstructions104Vehicle Maintenance
FMCSR:393.19Hazard warning signal inoperable103Vehicle Maintenance

Peer Context

This carrier vs national averages. Lower is better for all metrics.

Vehicle OOS Rate
36.0%vs nat'l 23.4%
+12.6 pts above avg
Driver OOS Rate
4.0%vs nat'l 6.7%
-2.7 pts below avg
Violations / Inspection
3.96vs nat'l 1.80
+2.16 above avg

National averages: vehicle OOS 23.4%, driver OOS 6.7%, violations per inspection ~1.8. Based on FMCSA MCSAP program data.

Inspection History (25 inspections)

fmcsa-inspectionsApr 5, 2026
Inspection History (25 inspections)
DateReport #StationStateLevelVehicleViolationsTop CodesOOS
Mar 12, 202687289424MARANA AZAZLevel 3AUTOCAR STRAIGHT TRUCK1392.2-SLLTCDNo
Oct 14, 202586064088MARANA AZAZLevel 2KENWORTH STRAIGHT TRUCK6393.9A-LBL, 393.55D1-B, 393.9A-LFTSINo
Aug 29, 202585642634TUCSON AZAZLevel 2INTERNATIO TRUCK TRACTOR2396.17C-PI, 393.11A1-CSLRRNo
Jun 6, 202584893008SAHUARITA AZAZLevel 2PETERBILT STRAIGHT TRUCK4393.78A-WS, 393.9B-LIL, 390.21TB1-MCNo
Apr 2, 202584323884MARANA AZAZLevel 2PETERBILT STRAIGHT TRUCK5392.22A-D, 392.22B-DFPWD, 393.78A-WSNo
Jan 31, 202583772677TUCSON AZAZLevel 3PETERBILT STRAIGHT TRUCK0—No
Dec 26, 202483494678GREEN VALLEY AZAZLevel 3KENWORTH STRAIGHT TRUCK0—No
Nov 19, 202483249340MARANA AZAZLevel 2PETERBILT STRAIGHT TRUCK2393.134B-CRHLC, 393.78A-WSYes
Sep 18, 202482751678TUCSON AZAZLevel 2AUTOCAR STRAIGHT TRUCK8392.2, 393.11(a)(1), 393.48(a)Yes
Aug 19, 202482479934SAHUARITA AZAZLevel 2AUTOCAR STRAIGHT TRUCK3393.78(a), 393.134(b), 396.17(c)Yes
Jul 18, 202482197223ELFRIDA AZAZLevel 2PETERBILT TRUCK TRACTOR5393.78(a), 393.9(a), 396.17(c)No
Jul 17, 202482185158TUCSON AZAZLevel 2PETERBILT TRUCK TRACTOR9393.9(a), 390.21T(b)(1), 393.60(c)No
Jun 26, 202482003763TUCSON AZAZLevel 2PETERBILT STRAIGHT TRUCK2393.134(b), 393.95(g)Yes
Feb 29, 202481034544TUCSON AZAZLevel 3AUTOCAR TRUCK TRACTOR1392.16-DNo
Feb 29, 202481034176TUCSON AZAZLevel 1PETERBILT STRAIGHT TRUCK1392.2-SLLTCDNo
Oct 21, 202379971494SAHUARITA AZAZLevel 2MACK STRAIGHT TRUCK11393.9A-LIL, 393.78, 393.55D1-BNo
Oct 11, 202379880563TUCSON AZAZLevel 2AUTOCAR STRAIGHT TRUCK4392.2-SLL, 393.203E-CBP, 393.9B-LRRNo
Sep 22, 202379724546SAHUARITAAZAZLevel 3PETERBILT STRAIGHT TRUCK0—No
Sep 19, 202379708155INTERSTATE 10AZLevel 2AUTO STRAIGHT TRUCK1392.9(a)Yes
Aug 15, 202379405703MARANAAZAZLevel 2AUTOCAR STRAIGHT TRUCK2393.134B-CRHLC, 393.78A-WSYes
Jul 26, 202379258159RoadsideAZLevel 1AUTO STRAIGHT TRUCK0—No
Jun 23, 202378983773RoadsideAZLevel 2KW STRAIGHT TRUCK7393.9(a), 393.45(b)(2), 393.134(b)(3)Yes
Jun 5, 202378822276RoadsideAZLevel 2MACK TRUCK TRACTOR7392.2, 390.17, 392.16(a)No
May 11, 202378610049SACATON REST AREA WESTBOUNDAZLevel 2EAGB OTHER11392.2, 396.17(c), 383.23(a)(2)Yes
May 4, 202378544918I-10 WBAZLevel 2KW TRUCK TRACTOR7393.9(a), 393.78, 393.60(d)Yes

Inspection analytics

Monthly cadence, frequent stations, and violation mix

Inspections per month (24 mo)

13 total · 30.8% OOS
2024-062026-03
InspectionsOOS

Most frequent inspection stations

TUCSON AZ8 · 2 OOS
MARANA AZ4 · 1 OOS
SAHUARITA AZ3 · 1 OOS
INTERSTATE 101 · 1 OOS
ELFRIDA AZ1
SACATON REST AREA WESTBOUND1 · 1 OOS
SAHUARITAAZ1
MARANAAZ1 · 1 OOS

Violations by BASIC category

General/Admin6 · 1 OOS
Driver Fitness2 · 1 OOS

Recent Crashes

2 crash records from FMCSA Crash File

Total Crashes
2
Fatalities
1
Fatal crashes on record
Injuries
0
Tow-Aways
2

Crash History (2 records)

fmcsa-crash-fileApr 5, 2026
Crash History (2 records)
DateStateSeverityFatalitiesInjuriesCityLocationVINCarrier Name at Crash
Apr 22, 2025AZFATAL10—Camino Desierto @ Paseo Del Norte...010247STAMBACK SEPTIC SERVICE
May 9, 2024AZTOW00TUCSONI-10@M262...241178WAC LLC

Compliance Timeline

2 events merged from authority, insurance, enforcement, OOS, crash, MCS-150, and safety rating records

Apr 22, 2025
Crash
Fatal crash in AZ
1 fatality, 0 injuries
May 9, 2024
Crash
Tow-away crash in AZ
0 fatalities, 0 injuries

Related Records

Related records

StateAll entities in Arizona
Browse carriers, brokers, and FFs in AZ
CityEntities in WILLCOX, AZ
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Crashes2 crash records
FMCSA Crash File
Inspections25 inspection records
Full inspection history
StationTUCSON AZ
8 inspections at this station
StationMARANA AZ
4 inspections at this station
StationSAHUARITA AZ
3 inspections at this station
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RecallsRecalls & safety data
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Data sources & freshness

FMCSA Company Census File
Generated from 24-hour old database. Contact info and fleet counts may lag.
Updated 1 weeks ago
FMCSA Authority History
Updated 1 weeks ago
FMCSA Insurance Filings
Updated 1 weeks ago
FMCSA Vehicle Inspection File
Updated 1 weeks ago
Refresh dataLast updated: Apr 5, 2026