Table 3: Average concentration and standard deviations of PAHs detected at the three experimental sites. The table included also the mean level of PAH totals (sum of the concentrations of each PAH analysed).

Chemical compound	Burgesi		Cavallino		Nardò
ng/m3	Average	Std. dev.	Average	Std. dev.	Average	Std. dev.
Acenaphthylene (ACY)	21.79	23.8	58.96	80.2	36.39	31.8
Acenaphthene (ACE)	39.76	34.8	218.61	282.5	24.05	23.0
Fluorene (FL)	0.16	0.2	0.20	0.1	0.33	0.3
Phenanthrene (PHE)	0.44	0.3	0.34	0.2	0.30	0.1
Anthracene (ANT)	2.49	4.3	0.04	0.04	2.70	4.5
Fluoranthene (FLT)	0.17	0.3	< 0.005	0.002	0.41	0.7
Pyrene (PYR)	0.15	0.3	< 0.005	0.001	0.36	0.6
Benzo(a)anthracene+ Chrysene (BaA+CHR)	0.07	0.1	18.91	28.2	13.40	22.9
Benzo(b+k)fluoranthene (B(b+k)F)	0.16	0.2	0.07	0.1	0.39	0.6
Indeno(1,2,3-c,d)pyrene (IcdP)	0.01	0.006	0.04	0.03	0.03	0.02
Dibenzo(a,h)anthracene (dahA)	0.07	0.1	0.32	0.4	0.20	0.3
Benzo(ghi)perylene (BghiP)	0.84	1.4	4.98	6.4	3.22	5.5
Dibenzo(al+ai)pyrene	0.96	1.3	5.64	7.4	3.96	6.1
Dibenzo(ae)pyrene	0.005	0.003	0.01	0.01	0.01	0.004
Dibenzo(ah)pyrene	0.04	0.1	11.70	17.5	8.23	14.2
Benzo(a)pyrene (BaP)	1.5	1.7	5.0	6.2	0.7	0.6
PAH totals	69.5	54.9	324.9	428.5	94.7	97.1