Which of the following statements are correct with respect to estimation of water tanks?

A: Water proofing compounds are added in plaster of water tank walls.

B: Item particulars in estimate of water tanks, does not include estimate of ladder to be built around it.

C: When the vertical and horizontal walls of tanks meet, a sloping structure is built at their intersection, this is called haunching.

D: When the vertical and horizontal walls of tanks meet, a sloping structure is built at their intersection, this is called soling.