Table 4.

Average, median, exceedances to the legislation and the p value of the difference between the hourly mean before and after implementation of IAP mitigation measure for the occupation period for PM₁₀.

ME	(PM10)in a						(PM10)post b						p Value
	Avg c	Med d	Exceedances (%)				Avg c	Med d	Exceedances (%)
			WHO e		PL f				WHO e		PL f
CR1_A	43.06	39.25	0	✓	0	✓	41.72	40.75	0	✓	0	✓	0.757
CR1_B	71.95	70.25	33	✕	0	✓	50.40	47.63	0	✓	0	✓	0.013 *
JI1_A	120.44	103.00	33	✕	100	✕	63.58	61.63	33	✕	0	✓	0.006
PRIM1_A	54.80	51.67	25	✕	0	✓	53.81	62.63	0	✓	0	✓	0.959
PRIM1_B	38.03	38.85	0	✓	0	✓	40.42	38.13	0	✓	0	✓	0.563
RF1	47.04	51.25	33	✕	0	✓	29.33	29.75	0	✓	0	✓	0.100
JI2_A	64.18	59.25	0	✓	0	✓	140.57	122.75	67	✕	100	✕	0.011
PRIM2_A	53.67	54.75	0	✓	0	✓	60.99	59.38	0	✓	0	✓	0.480
PRIM2_B	33.61	31.25	0	✓	0	✓	33.76	32.25	0	✓	0	✓	0.931
PRIM2_C	55.81	40.75	100	✕	0	✓	54.36	47.75	0	✓	0	✓	0.605
CR3_A	43.88	42.38	67	✕	0	✓	62.01	58.25	33	✕	50	✕	0.010
CR3_B	37.33	42.50	0	✓	0	✓	28.79	28.75	0	✓	0	✓	0.400
CR3_C	36.13	36.13	0	✓	0	✓	136.69	136.69	100	✕	50	✕	0.333
CR3_D1	37.08	29.13	50	✕	0	✓	26.00	21.50	0	✓	0	✓	0.400
CR3_D2	23.17	16.75	0	✓	0	✓	35.63	29.00	0	✓	0	✓	0.400
RF3	860.25	903.25	100	✕	100	✕	23.50	25.50	0	✓	0	✓	0.100

^a PM₁₀ concentration of first IAQ campaign; ^b PM₁₀ concentration of second IAQ campaign (after IAP mitigation measures implemented); ^c Average; ^d Median; ^e % of exceedances to the World Health Organization (WHO); ^f % of exceedances to the Portuguese legislation; * p < 0.05 (considered statistically significant) for the item in bold; ✕—Exceedances to the Portuguese legislation or WHO; ✓—No exceedances to the Portuguese legislation or WHO.