Professional Drug and Alcohol Testing on Site. Background Checks, Pre-Employment Drug Screening, Post Accident Testing, DOT Drug/Alcohol Testing, Athlete & Student Drug Testing, Paternity & DNA Tests. Orange County Mobile Drug Testing is certified by the DOT and DATIA. We offer 24 hour Post Accident Drug and Alcohol Testing in Orange County and all of Southern California. Pre Employment Mobile Drug Testing and DOT Post Accident Drug Testing. Covering Orange County, Los Angeles County, San Diego County. Anyone, Anytime, Anywhere! Drug Testing, Drug Screening, Alcohol Testing, DNA Testing, Background Screening, Background Checks, Paternity Tests, Pre-Employment Drug Testing, DOT Drug and Alcohol Testing, Student / Athlete Drug Testing