According to the German Federal Environmental Agency, "if the use of PAH containing extender oil is stopped within limits for BaP of 1ppm and PAH of 10 ppm the PAH concentration in tyre tread would drop to about 0,33ppm for BaP and 3,3ppm for the PAH's, This will in consequence lead to a reduction of the PAH emissions from tyre wear of more than 95% within 5-6 years".
According to the German Federal Environmental Agency, "if the use of PAH containing extender oil is stopped within limits for BaP of 1ppm and PAH of 10 ppm the PAH concentration in tyre tread would drop to about 0,33ppm for BaP and 3,3ppm for the PAH's, This will in consequence lead to a reduction of the PAH emissions from tyre wear of more than 95% within 5-6 years".