Safety Supply & Occupational Health Clinic. As a ONE STOP SHOP, we offer: Physical Assessments (Pre-employment, Post-Offer, Post-employment) DOT Physical Exams Drug Testing (Urine & Hair) Breath Alcohol Respirator Fit Testing & Medical Clearance Ergonomic Evaluations Audiometric Testing Spirometry DOT Exams Our onsite safety supply, service, and calibration services include fire extinguishers, fire suppression systems, H2S gas monitors, hydrostatic cylinder testing, and much more.