Noise and Vibration

We have repeatedly urged the County to measure blast vibration on homes themselves, and not simply measure the ground effect of the blast. The blast effect on a structure is potentially much greater than the effect on the ground, and the DEIR is seriously flawed when it considers only ground effects.

More generally, the DEIR fails to consider a number of sensible, practical steps that the Quarry can take to mitigate significantly the noise effects on residents, such as reducing maximum truck speed, rubberizing the asphalt on Pt. San Pedro Road, spacing out the trucks more than is currently required, reducing the amount of explosives used so as to lighten the effects of blasting on nearby homes and requiring that more material be barged out of the Quarry site in order to reduce truck trips.