Figure 4
From: Air pollution in Boston bars before and after a smoking ban
Pre-ban secondhand smoke respirable particulate, SHS-RSP, (total measured RSP – background RSP, B) in micrograms per cubic meter and SHS-PPAH concentration (total measured PPAH – background PPAH, B') in nanograms per cubic meter versus burning cigarette density Ds (active smokers observed per hundred cubic meters of space volume) and air exchange rate Cv in units of air changes per hour (ach) as calculated from RSP using the model of Repace (2005). The decay rates of PPAH are higher than for RSP. Background-subtraction values are arbitrarily chosen from measured open-window nonsmoking hotel room values. Data from Pub # 6 are omitted from this plot.