sec.440ZBBlasting

### sec.440ZB Blasting A person must not conduct blasting if— the airblast overpressure is more than 115dB Z Peak for 4 out of any 5 consecutive blasts; or the airblast overpressure is more than 120dB Z Peak for any blast; or the ground vibration is— for vibrations of more than 35Hz—more than 25mm a second ground vibration, peak particle velocity; or for vibrations of no more than 35Hz—more than 10mm a second ground vibration, peak particle velocity. s 440ZB ins 2008 No. 52 s 41 - (a) the airblast overpressure is more than 115dB Z Peak for 4 out of any 5 consecutive blasts; or - (b) the airblast overpressure is more than 120dB Z Peak for any blast; or - (c) the ground vibration is— (i) for vibrations of more than 35Hz—more than 25mm a second ground vibration, peak particle velocity; or (ii) for vibrations of no more than 35Hz—more than 10mm a second ground vibration, peak particle velocity. - (i) for vibrations of more than 35Hz—more than 25mm a second ground vibration, peak particle velocity; or - (ii) for vibrations of no more than 35Hz—more than 10mm a second ground vibration, peak particle velocity. - (i) for vibrations of more than 35Hz—more than 25mm a second ground vibration, peak particle velocity; or - (ii) for vibrations of no more than 35Hz—more than 10mm a second ground vibration, peak particle velocity.