 An innovative drilling and blasting technique called Penetrating Cone Fracture ( PCF ) was used in the remedial works process . PCF was chosen over conventional drilling and / or blasting techniques due to the reduced risk of damage to the existing structure from vibration , as well as lower noxious fume and dust levels . 
 An innovative drilling and blasting technique called Penetrating Cone Fracture ( PCF ) was used in the remedial works process . PCF was chosen over conventional drilling and / or blasting techniques due to the reduced risk of damage to the existing structure from vibration , as well as lower noxious fume and dust levels . 
An innovative drilling and blasting technique called Penetrating Cone Fracture ( PCF ) was used in da remedial works process . PCF was chosen over conventional drilling and / or blastin techniques due to the reduced risk of damage to tdaexisting structure from vibration , as well as lower noxious fume and dust levels .