Tri-Cities Laboratory 7131 West Grandridge Blvd. Kennewick, WA 99336. Contact TCL 509-736-0100 1-800-213-6372. PATIENT: Welcome to the TCL Testing Information Portal This Testing Information portal is a powerful, accessible gateway to our laboratory products and services. It makes it easy for users to find and view up-to-date testing ...PSC Locations‧Provider.