Table 4.

Diagnostic ratios for PM2.5-bound PAHs in indoor and outdoor air collected in two investigated sites in Silesia, Poland

Ratioa	Outdoor air		Indoor air		Range	Source type
	Dąbrowa Górnicza	Złoty Potok	Dąbrowa Górnicza	Złoty Potok
ΣLMW/ΣHMW	0.47	0.68	0.62	0.62	<1	Pyrogenic
FL/(FL + PYR)	0.19	0.22	0.27	0.41	<0.5	Petrol emission
ANT/(ANT + PHE)	0.17	0.20	0.15	0.14	>0.1	Pyrogenic
PHE/PHE + ANT	0.83	0.80	0.85	0.86	0.76	Coal
FLA/(FLA + PYR)	0.45	0.46	0.60	0.70	0.4–0.5	Fossil fuel combustion
					>0.5	Grass, wood, and coal combustion
					0.57	Coal burning
BaA/(BaA + CHR)	0.51	0.50	0.49	0.47	0.5	Coal/coke
					0.46	Coal burning
BaP/(BaP + CHR)	0.47	0.48	0.67	0.73	0.5	Diesel
					0.73	Gasoline
BaA/BaP	1.19	1.13	0.49	0.34	0.5	Gasoline
					1	Diesel and wood combustion
IcdP/(IcdP + BghiP)	0.49	0.50	0.50	0.51	0.2–0.5	Petroleum combustion
					>0.5	Grass, wood and coal combustion
IcdP/BghiP	0.98	1.08	1.00	1.03	~1	Diesel
BbF/BkF	1.97	1.96	2.01	1.91	>0.5	Diesel
BaP/BghiP	0.91	1.06	0.98	1.00	0.9–6.6	Wood combustion

ΣLMW total concentrations of two- and three-ring PAHs, ΣHMW total concentrations of four- and five-ring PAHs

^aPAH diagnostic ratios for various sources adopted from Tables 3 and 4 in Rogula-Kozłowska (2015) and references cited therein