Table 2.

Summary of the increases in PM_2.5 concentrations (1-h average and peak PM_2.5 concentrations, μg/m³) during the morning and afternoon shifts.

Subject ID	ΔPM2.5-ave		ΔPM2.5-peak
	Morning	Afternoon	Morning	Afternoon
01A	7.3	2.6	22	39
01B	35.1	4.4	89	26
01C	25.8	11.9	39	23
02A	62.4	13.9	146	120
02B	64.4	30.5	84	122
02C	86.8	47.2	148	101
03A	3.1	2.4	17	18
03B	16.1	1.2	24	3
03C	17.0	11.6	41	57
04A	84.7	23.7	126	45
04B	15.2	5.8	100	33
04C	1.1	2.2	4	4
05A	74.9	47.5	278	92
05B	47.9	37.6	73	120
05C	20.3	26.5	32	34
06A	22.1	11.2	62	67
06B	8.0	1.6	15	6
06C	65.9	63.8	77	95
07A	13.0	5.0	67	18
07B	40.8	24.9	110	53
07C	21.6	13.9	45	75
08Aa	21.2	16.8	26	45
09A	32.7	21.2	50	28
09B	31.2	42.6	51	150
09C	28.8	22.0	63	105
10Cb	80.0	51.0	107	72
11Ac	15.8	25.0	46	114
11Cc	41.6	33.3	54	60
Average±SD	35.2±25.9	24.1±22.1	71.3±56.1	64.3±43.5
Range	1.1–87	1.2–98	4.0–278	3.0–150

^aSubject 08 withdrew from the study after one measurement.

^bOne valid exposure measurement for subject 10.

^cTwo valid exposures for subject 11.