Cd(mg/kg) Pb(mg/kg) Cr(mg/kg) Ni(mg(kg) Cu(mg/kg) Zn(mg/kg) Fe(mg/kg) Sample 1 1.81 27.86 7.92 26.12 46.42 3474.00 489.60 Sample 2 1.77 17.51 17.52 9.86 39.96 3732.00 7256.00 Sample 3 0.47 13.97 4.12 4.11 5.59 5314.00 129.12 Sample 4 2.05 33.58 3.34 5.27 84.49 13202.00 657.40 Sample 5 2.68 11.23 2.84 8.95 9.50 6462.00 355.40 Sample 6 2.38 22.84 2.95 5.43 27.47 4866.00 1577.40 Sample 7 0.47 10.76 3.58 5.14 5.49 4168.00 543.00 Sample 8 1.51 29.44 1.91 3.90 14.43 6006.00 262.20 Sample 9 1.53 38.99 5.37 5.75 65.11 4194.00 346.80 Limit(LND, 2011) 2.00 100.00 150.00 120.00 120.00 150.00 N.D.

Table 2: Levels (mg/kg) of cadmium, lead, chromium, nickel, copper, zinc and iron in samples of rubber crumb. The triple horizontal line separates new crumb (samples 1-5) and crumb sampled from sporting installations (samples 6-9). Values in bold exceeded the limits set by the Italian National Amateur League reported in the last row.