Testing Locations » California » West Covina CA » Quest Diagnostics – West Covina Sunset Avenue – Employer Drug Testing Not Offered Quest Diagnostics – West Covina Sunset Avenue – Employer Drug Testing Not Offered Quest Diagnostics – West Covina Sunset Avenue – Employer Drug Testing Not Offered1135 S Sunset AveSte 400West Covina, CA 91790-3964 United States Located in the Medical Arts building next to Queen of the Valley Hospital.rnQuantiferon collection after 200pm
