Decay rates were estimated using a Bayesian regression model, using SARS-CoV-2 nCoV-WA1-2020 (MN985325.1) and SARS-CoV-1 Tor2 (AY274119.3). Aerosols containing (105.25 50% tissue-culture infectious dose ($TCID_{50}$) per milliliter) of SARS-CoV-2 or (106.75-7.00 $TCID_{50}$ per milliliter) of SARS-CoV-1 were produced with a 3-jet Collison nebulizer. The samples were inserted in a Goldberg drum to produce an aerosolized environment. The study design incorporated 5 environmental conditions: aerosols, plastic, stainless steel, copper, and cardboard.