(562) 989-5991

HPC Testing Services
HPC Testing Services
  • Home
  • Drug Testing
    • Drug And Alcohol Testing
    • Hair Nail Drug Testing
    • On Site Mobile Testing
  • DNA Testing
  • DOT Testing
    • DOT Testing Compliance
    • Return To Duty (RTD Test)
    • Clean Truck Check CARB
    • DOT FMCSA Safety Training
  • More
    • Home
    • Drug Testing
      • Drug And Alcohol Testing
      • Hair Nail Drug Testing
      • On Site Mobile Testing
    • DNA Testing
    • DOT Testing
      • DOT Testing Compliance
      • Return To Duty (RTD Test)
      • Clean Truck Check CARB
      • DOT FMCSA Safety Training

(562) 989-5991


  • Home
  • Drug Testing
    • Drug And Alcohol Testing
    • Hair Nail Drug Testing
    • On Site Mobile Testing
  • DNA Testing
  • DOT Testing
    • DOT Testing Compliance
    • Return To Duty (RTD Test)
    • Clean Truck Check CARB
    • DOT FMCSA Safety Training

Return To Duty Process (RTD) DOT Drug Test & Clearinghouse

Fast & Compliant RTD DOT Drug Testing in Signal Hill, Long Beach CA and Los Angeles County

Are you an commercial license holder struggling with a “Driver Prohibited” status in the FMCSA Clearinghouse? Completing your Return To Duty (RTD) drug test is required to return to safety-sensitive work. The FMCSA mandates that all drivers assign a Consortium/Third-Party Administrator (C/TPA) to manage and report drug and alcohol testing results, including RTD tests.

At HPC Testing Services, we help Owner-Operators and drivers:

* Complete DOT-compliant RTD drug tests
* Assign a C/TPA for direct Clearinghouse reporting
* Meet FMCSA and DOT compliance requirements quickly and efficiently
* Receive confidential, supervised testing with fast results
* Schedule and complete follow-up testing as required by the SAP program

After a positive test or violation, drivers must complete a Substance Abuse Professional (SAP) program, pass a supervised RTD test, and comply with follow-up testing requirements to maintain their driving eligibility. Our team guides you through every step, ensuring you meet all DOT and FMCSA requirements and return to work safely.

Why Choose HPC Testing Services?

* Trusted local provider serving Signal Hill, Long Beach, and surrounding areas
* Fast, confidential, and reliable drug testing
* Direct FMCSA Clearinghouse reporting for Owner-Operators
* Personalized guidance through the RTD, SAP, and follow-up testing process

Get Back on the Road Today


Call us or schedule your Return To Duty DOT Drug Test online. We make FMCSA and DOT compliance simple so you can focus on driving safely. See our location on our Google Business Listing for Signal Hill & Long Beach.
 

young man outside a semi truck looking at his phone

Frequently Asked Frequently Asked Questions (FAQ)

FMCSA Clearinghouse & RTD Drug Testing - Signal Hill, Long Beach, Near me 

An RTD test is a DOT-mandated drug test that drivers must pass after a positive test or violation before returning to safety-sensitive work. 


Owner-Operators are required to assign a Consortium/Third-Party Administrator (C/TPA) to manage drug and alcohol testing records, including RTD results. An "Employer" may assign a C/TPA to assist with reporting however it is ultimately the Employers responsibility.
 


Testing and direct reporting can be completed quickly, often the same day, depending on the SAP program completion and test scheduling.
 


Yes. HPC Testing Services can perform your RTD drug test and report it directly to the Clearinghouse to restore your driving status as long as your SAP has updated your Clearinghouse and "Determined Eligible for RTD Testing"

 


Yes. We guide drivers through the Substance Abuse Professional (SAP) process to ensure compliance with DOT and FMCSA requirements. 


 Follow-up testing is a DOT requirement after a positive test or violation. Drivers must complete random, unannounced drug and/or alcohol tests as directed by their SAP to ensure ongoing compliance.


 Follow-up testing is typically required at least six times in the first 12 months, but your SAP may set a longer schedule depending on your situation. 


Yes. We can schedule and perform DOT-compliant follow-up tests and report results directly to the FMCSA Clearinghouse to keep your compliance current if you are an Owner-Operator. 


Missing a follow-up test can result in a “Driver Prohibited” status. It’s essential to complete all required follow-up tests on schedule to remain in compliance. 


Contact Us

Drop us a line!

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Better yet, see us in person!

We love our customers, so feel free to visit during normal business hours.

HPC Testing Services

1600 E Burnett St, Signal Hill, CA, USA

(562) 989-5991

Hours

Mon-Fri: 8:30 AM - 5:30 PM

Sat: 8:30 AM - 5:30 PM

Sun: Closed

Copyright © 2025 HPC Testing Services - All Rights Reserved.

Serving Long Beach, Signal Hill, and Los Angeles

  • Privacy Policy and Terms

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

DeclineAccept