Pyr(mg/kg) B(a)A(mg/kg) Chry(mg/kg) B[b]F (mg/kg) B(k)F (mg/kg) B(a)P (mg/kg) D(ah)A (mg/kg) B(ghi)Per (mg/kg) Sample 1 5.67 1.17 2.90 11.10 0.68 0.26 0.46 0.90 Sample 2 6.73 1.61 3.42 15.72 1.20 0.46 0.36 0.45 Sample 3 3.98 0.09 0.92 1.15 0.07 0.12 0.19 0.40 Sample 4 5.97 0.44 1.40 4.57 0.50 0.23 0.07 0.42 Sample 5 3.80 0.27 0.70 1.56 0.35 0.17 0.43 0.59 Sample 6 1.64 0.12 0.24 1.90 0.13 0.27 0.34 0.54 Sample 7 2.14 0.04 0.92 1.25 0.22 0.06 0.11 0.24 Sample 8 1.91 0.01 0.62 1.44 0.61 0.05 0.13 0.34 Sample 9 10.28 0.39 0.92 10.19 3.62 0.66 0.57 0.48 Limit (Dlgs 152/2006) 5.00 0.50 5.00 0.50 0.50 0.10 0.10 0.10

Table 5: Levels of PAHs (mg/kg) with maximum admissible concentration known detected in samples and the limits set by the Legislative Decree 152/2006. The triple horizontal line separates new crumb (samples 1-5) from crumb sampled from sporting installations (samples 6-9). Values in bold exceeded the limit.