tri-county-testing Make an Appointment If you need to secure your workplace and improve DOT compliance, then make an appointment and our professionals will get in touch with you. First Name (required) Last Name (required) Your Email (required) Contact No Your Message 1. Accurate Testing Our tests are governed by strict standards to ensure accurate testing every time. 2. Quick Results With mobile testing, you are able to collect samples on-site, saving you time and money. 3. Cost Efficient Our mobile testing is cost-efficient, allowing mass testing affordable for companies.