Crossroads Drug and Alcohol Testing

We offer a variety of screenings to detect illegal, controlled substances, and over the counter medications for more than 20 popular drugs of abuse.

No Appointment Necessary • Walk-Ins Welcome • On-site Mobile Testing 24/7
Minimum Wait Time • Epass/Qpass

8am-5pm Mon-Fri | Sat & Sun closed

Testing Methods for Drugs and Alcohol

Illegal drugs can be detected by several methods. The most common method is to screen a urine sample for drugs. Oral fluids (saliva) and hair follicle are reliable methods, too. A breath sample is the standard for the detection of alcohol in the system, but urine and saliva are acceptable options to screen for alcohol.


Laboratory Drug Testing

Laboratory drug testing is more favorable to other types of test options because it instills more confidence in the employer and employee. Results are determined by laboratory instruments that are regularly examined and calibrated to ensure accuracy. The laboratory will conduct an initial screening for substances and if detected, will conduct a second test using Gas Chromatography Mass Spectrometry or GC/MS, a more precise method to determine the presence of drug metabolites.

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Instant Drug Testing

We use approved Food and Drug Administration (FDA) and CLIA (Clinical Laboratory Improvement Amendments) Point of Care Testing devices. If the result is positive, the sample is sent to a certified laboratory for Gas chromatography-mass spectrometry (GC-MS) confirmation. 

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Alcohol Testing

Breath samples are the most common method of alcohol detection for employment. Breath yields immediate results. We use breath alcohol devices that are listed on the federally approved compliance list for DOT (Department of Transportation) testing. The presence of alcohol can also be detected in a urine or saliva sample.

Hair Testing

Analyzes for drugs within the hair shaft using about a half-inch of Hair to detect drug usage within the previous 90 days (about 3 months). Due to the passing of the new marijuana testing law AB2188 in California, hair drug testing is not recommended in California for employment.

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Oral Fluids Testing

Saliva identifies recent drug usage that can be missed by urine testing. Oral samples identify donors under the influence when the sample is collected. The window of detection in oral fluid starts within one hour of drug usage. Read the new 2024 law AB2188 on why you might switch to Oral fluids if you are an employer in California and NOT regulated by Federal testing regulations.

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Onsite / Mobile Testing

Crossroads will bring its clinic to your location and test employees for pre-employment testing, random testing, post-accident testing, or reasonable suspicion testing 24/7 365. Your employees do not have to wait at a clinic for hours, costing you money by not being productive. If you have a major hiring event that requires testing onsite, Crossroads is the company to call.

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Make Crossroads your C/TPA

As your Consortium/Third-Party Administrators, we can manage all, or part, of your DOT drug and alcohol testing program, sometimes including maintaining required testing records.

DOT Testing

The Department of Transportation’s (DOT) rule, 49 CFR Part 40, describes required procedures for conducting workplace drug and alcohol testing for all Federally regulated transportation industry. It established the goal of a Drug-Free Federal Workplace.

For-Hire Passenger Carriers

In California, drug and alcohol screenings are required of for-hire passenger carriers: limousines, airport shuttles, chartered, scheduled bus operators, and Transportation Network Companies.

Human Resources

As your one stop solution C/TPA. Our online electronic drug/alcohol screening program makes it easy to access web-based screenings which allows you or the DER to order, schedule, inform the donor of test location, monitor the time of specimen collection, follow donor/specimen status, track missed donor appointments, and view many other screening details.

Prime Contractors

We can help boost your contracting awards. Although not all contracts have DBE (Disadvantage Business Enterprise) goals to meet, it is still prudent for prime contractors and subcontractors to consider every opportunity to utilize the services of a DBE as their primary TPA.


1755 Huntington Drive #102
Duarte, Ca 91010

Hours are 8-5 M-Fri
Walk-Ins Welcome