NaCl was deposited on each of the Au(111) and Au(110) samples via sublimation at 780 K. CO was then deposited on the various samples at similar dosing conditions: a sample base temperature of 4.3 K, a partial CO pressure of 9.0 E-9 mbar in the STM chamber, and a sample temperature maximum of 7.1 K with the STM thermal shields open during the dosage. The total CO deposition time was 80 seconds for each sample.