Hi alexp79
Yes there was both scoria and gravel at site prior to set out.
I think I know the photo you are talking about. (near the alfresco)
The puddle is at the base of the berm. (that section of block was cut, the front was filled).
It's pooled there because of some heavy overnight rain.
I went back and had a look about 4 hours later, all water had gone.
cheers.