Fig. C.1.

(Color Online) Location of tracer gas (ethane) concentration sensors on the floor plan during the (A) afternoon test and (B) morning test with a leak. The red seat indicates the position of index case A1. Small red-outlined circles indicate the seating location of the infected patrons. Small blue circles indicate the location of the tracer gas sensors. The tables are numbered TA, TB, and TC for families A, B, and C, respectively, and T04–T18 for the other tables. The morning test with a leak was unintended; the tracer gas leaked due to a damaged pipe below TA. Nevertheless, the measured data from test (B) also support the observed distribution in test (A).