In N_URB3 on weekdays during occupancy, PM1/PM2.5 ratio
varied from 0.95 to 0.98, PM2.5/PM10 ratio from 0.64 to 0.89, and
PM10/PMTotal ratio from 0.50 to 0.89. During non-occupancy periods
on weekdays, PM1/PM2.5 ratio varied from 0.95 to 0.99, PM2.5/PM10
ratio from 0.93 to 0.98, and PM10/PMTotal ratio from 0.97 to 0.99. On