In vitro toxicity of particulate matter (PM) collected at different sites in the Netherlands is associated with PM composition, size fraction and oxidative potential - the RAPTES project

Table 1 Mean values of air pollutants and meteorological conditions at the selected sampling days

Site	Date	PM_{10-2.5 μm}	PM_{2.5-0.18 μm}	PM_{0.18 μm}	PNC	O₃	NO	NO₂	Temp	RH	Wind	BG PM₁₀
		(μg/m ³ )	(μg/m ³ )	(μg/m ³ )	(#/cm ³ )	(ppb)	(ppb)	(ppb)	(°C)	(%)	(m/s)	(μg/m ³ )
Farm	05-Jul-07	4.3	6.7	3.8	6700	30	2.99	6.6	17	81	5.3	18
Urban background	02-Jul-07	3.9	6.1	2.0	20600	23	7.39	16	18	81	0.26	15
Steelworks	16-Jul-07	6.0	11	4.5	NA	37	14.1	32	21	84	1.2	27
Harbor	13-Dec-07	6.1	19	5.5	19600	3.9	25.2	24	3.8	90	3.2	24
Continuous traffic	12-Jul-07	15	16	4.4	NA	12	36.5	25	18	79	2.5	26
Truck traffic	26-Jul-07	6.0	14	4.1	42800	4.5	106	30	20	81	3.8	17
Stop & go traffic	24-Jan-08	43	28	13	64700	2.4	41.1	38	11	90	4.8	90
Underground	26-Sep-07	58	38	83*	39300	0.9	14.9	20	18	57	0.00	13

PNC, particle number concentration (median); Temp, temperature; RH, relative humidity; BG, background levels of PM₁₀; NA, not available; * selected day not available, mass concentration estimated based on average values during other sampling days at this site.

ISSN: 1743-8977