Quest now offers COVID-19 antibody testing by appointment. Not available to patients experiencing COVID-19 symptoms within last 10 days; face covering required at all locations. Welcome to Quest Diagnostics. TSPOT: M-F 8:00 am-12:00 pm 1:00 pm-4:00 pm. PSC across the street from the postal service office. In the back of the Safeway parking lot. Visit our website, QuestDiagnostics.com, to get tips for preparing for your test and to schedule an appointment. This location, along with blood and urine testing, features: Routine Lab Test; Pediatric Specialty; Glucose Tolerance Test