Abstract: At 3:58 p.m. on December 12, 2106, Employee #1 was picking up tools and equipment from the work-site after a day of installing sheathing and face board on the new construction residential home. Employee #1 uncovered a basement opening in the garage and climbed down an extension ladder into the basement to check on a generator that was placed in the basement. Employee #1 was overcome from carbon monoxide and fell face down on the floor. Employee #2 could not locate the employee on the work-site, so he entered the basement looking for the employee. Employee #2 dragged Employee #1 to the ladder and ascended the ladder to phone for emergency services. Employee #2 re-entered the basement to check the employee's breathing and was overcome by carbon monoxide also. Both individuals were found unresponsive by emergency personnel that arrived at the work-site. Employee #2 recovered from the incident and Employee #1 died as a result.