Testing Locations » Connecticut » Wethersfield CT » Quest Diagnostics – Wethersfield 1025 Silas Deane Highway – Employer Drug Testing Not Offered Quest Diagnostics – Wethersfield 1025 Silas Deane Highway – Employer Drug Testing Not Offered Quest Diagnostics – Wethersfield 1025 Silas Deane Highway – Employer Drug Testing Not Offered1025 Silas Deane HwyWethersfield, CT 06109-4229 United States Route 99