Testing Locations » California » Lancaster CA » Quest Diagnostics – Lancaster West Avenue J – Employer Drug Testing Not Offered Quest Diagnostics – Lancaster West Avenue J – Employer Drug Testing Not Offered Quest Diagnostics – Lancaster West Avenue J – Employer Drug Testing Not Offered1629 W Avenue JSte 102Lancaster, CA 93534-2850 United States Located across from Antelope Valley Hospital between 16th and 17th Streets West.rnQuantiferon collection after 200pm