
Precision Diagnostic Solutions provides reliable DOT and non-DOT drug testing, breath alcohol testing, and DNA specimen collection services for employers, government agencies, schools, staffing companies, transportation professionals, and individuals. Clients may visit our Hayward office or schedule convenient mobile and on-site services throughout Northern California. We offer appointments, walk-in availability, same-day service when available, and coordinated group testing for workplaces and educational programs. Our woman-owned business is committed to accurate collection procedures, proper chain-of-custody documentation, confidentiality, regulatory compliance, and responsive customer service. At Precision Diagnostic Solutions, every collection is guided by our promise of Precision, Privacy, and Professionalism.
| Monday | 10:00 AM – 6:00 PM |
| Tuesday | 10:00 AM – 6:00 PM |
| Wednesday | 10:00 AM – 6:00 PM |
| Thursday | 10:00 AM – 6:00 PM |
| Friday | 10:00 AM – 6:00 PM |
| Saturday | 10:00 AM – 2:00 PM |
| Sunday | Closed |
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