hash_nanay
Would you be able to tell where in the engineering plan does it state the height of the land and the slab?
I really hope that you are not another one with a slab height issue.
Read through the threads that are linked below. They show engineering plans as well as discussing freeboard and the regulations. There are several threads on H1 about slab height issues.
viewtopic.php?f=31&t=69164&p=1126251#p1126251
viewtopic.php?p=1064688#p1064688