I'm not quite convinced the depositing of sand on a driveway, would end in a successful prosecution or if it is technically committing the offence, of criminal damage?
If the product is deposited loosely, after removal they would be some element of cleaning, thus damage has been caused.
The idea of depositing the sand therefore, could be construed as criminal damage. However in this case the depositing of the sand is carried out by another, who would be oblivious to the offence; it would be a normal act to deliver sand, but covering a bank with cow pooh would not.
If the driver or sand company, had been informed of the intention of depositing the sand, and carried out the act, then they would have become complicit in the offence.
But the delivering of the sand onto the driveway, by an innocent 3rd party, I'm not quite sure the offence would be complete?
Over to you pirate.