Interpath hours of operation and location: Interpath has in-house labs at the following locations around Tri-Cities. Pasco Lab Location: 515 West Court St.: Monday - Friday 8 AM - 6 PM / Sat. 8 AM - 12 PM. Kennewick Lab Locations: 3180 West Clearwater Suite A & B: Monday - Friday 8 AM -5 PM..