on-site testing faq
Your On-Site Testing answers and updates

YOUR TESTING EXPERTS: WSS is committed to providing the knowledge your team needs to create a safer workplace.


Are you still performing on-site testing?

Yes. Drug testing is considered an essential service, and we will continue to be available to our clients 24/7/365.

Do you do collection only?

Yes. WSS is partnered with many third-party administrators around the country.

How far do you travel for on-site collections?

We travel throughout Houston and its 12 surrounding counties. Wherever you are, we will come to you.

What are the benefits of on-site testing?

DOT regulations have nothing to do with the hiring or firing process. It is up to the discretion and company policy to determine if the employee needs to be removed. The employer’s responsibility is to immediately remove an employee from a safety sensitive operation. An employee may be subject to losing certain certifications or licenses needed to perform such jobs.

Are you doing post-COVID-19 Return to Duty testing?

Yes, as of April 16, 2020. However, please follow these safety guidelines to protect your employees and our on-site staff. 

EXPOSED:  Anyone who has been exposed by COVID-19 or suspects being exposed, are then mandated by the CDC to self-quarantine for two weeks; longer if they live with the person who has been exposed. Then it would be two weeks after the person has recovered, again mandated by the CDC.

ILLNESS: Prior to returning to work after an illness that includes COVID-19 Symptoms – especially fever – should have a return to duty release.  At least 3 days (72 hours) have passed since recovery defined as resolution of fever without the use of fever-reducing medications and improvement in respiratory symptoms (e.g., cough, shortness of breath); and, at least 7 days have passed since symptoms first appeared.
Persons who have COVID-19 who have symptoms and were directed to care for themselves at home may discontinue home isolation under the following conditions:
Resolution of fever without the use of fever-reducing medications and
Improvement in respiratory symptoms (e.g., cough, shortness of breath) and
Negative results of an FDA Emergency Use Authorized molecular assay for COVID-19 from at least two consecutive nasopharyngeal swab specimens collected ≥24 hours apart** (total of two negative specimens).

Individuals with laboratory-confirmed COVID-19 who have not had any symptoms may discontinue home isolation when at least 7 days have passed since the date of their first positive COVID-19 diagnostic test and have had no subsequent illness.

WSS can do a return to duty check AFTER a person has recovered from an illness only if the worker did not test positive and has been without fever for 72+ hours without medication.

Are you testing asymptomatic drivers?

Yes, we are testing all asymptomatic individuals who need to return to work. This includes but is not limited to:

  • Department of Transportation (DOT) physical exams and certification for all commercial driver’s license (CDL) holders
  • Breath alcohol testing (BAT) and urine drug screening (UDS) collections for controlled substance testing, which is still required under FMCSA regulations for the following situations:
    • Pre-employment testing
    • Post-accident testing
    • Reasonable suspicion
    • Return-to-duty
    • Follow-up testing