Reasons for testing

Pre-Emploment Testing

Pre-employment drug testing allows you to make informed decisions about potential employees. Abusing drugs can compromise the stability and integrity of your workplace, so pre-employment drug screening is essential in preventing the hiring of people who use drugs.

Random Testing

Random drug testing ensures that your current employees remain drug-free. Random drug testing allows an employer to use a random selection process to select one or more employees in the workplace to submit to a drug test.

Reasonable Suspicion Testing

Reasonable suspicion drug testing, which can be one of the most challenging aspects of a drug-free workplace program. Some of the indications that may warrant a reasonable suspicion drug test include, but are not limited to: smell of alcohol on the breath or odor on the body, confusion or disorientation, unsteady walking or standing, unusual or erratic behavior, and slurred speech. 

Follow-up Testing

You are the sole determiner of the number and frequency of follow-up tests and whether these tests will be for drugs, alcohol, or both, unless otherwise directed by the appropriate DOT agency regulation. For example, if the employee had a positive drug test, but your evaluation or the treatment program professionals determined that the employee had an alcohol problem as well, you should require that the employee have follow-up tests for both drugs and alcohol.


The employee returns to duty with Employer A. Two months afterward, after completing the first two of six follow-up tests required by the SAP's plan, the employee quits his job with Employer A and begins to work in a similar position for Employer B. The employee remains obligated to complete the four additional tests during the next 10 months of safety-sensitive duty, and Employer B is responsible for ensuring that the employee does so. Employer B learns of this obligation through the inquiry it makes under §40.25.

Certified Staff

Valley Testing certified staff assists employees at a collection site, who receives and makes an initial inspection of the specimen provided by those employees, and who initiates and completes the Federal Drug Testing Custody and Control Form (CCF).

The collector is the one individual in the drug testing process who has direct, face to face contact with the employee. Without the collector ensuring the integrity of the urine specimen and collection process, the test itself may lose credibility.

The procedure for collecting a urine specimen as outlined in 49 CFR Part 40 is very specific and must be followed whenever a DOT-required urine specimen collection is performed. These procedures, including the use of the Federal Drug Testing Custody and Control Form (CCF), apply only to DOT-required testing.