Compaction would be the biggest issue. The chemicals are long ago evaporated, leeched, and/or otherwise degraded after such a long period of time.

Thank you for the response.

If you removed the soil that might, possibly, have been exposed to the Chlorine used in the pool water then you will have removed what ever contamination there may have been, if any.
Since on of the reasons for building a raised bed is to bypass any native soil compaction that would not be a concern with raised beds, unless that same soil, un amended with organic matter, was used.

I have plants where an above ground pool was. The backwash dumped into another area than where the pool set. I have not had ANY problems.

Double post

This post was edited by wayne_5 on Thu, May 1, 14 at 13:13

A properly managed pool has available chlorine near what drinking water does, and a pH near neutral. Although you add a lot of chemicals over time, they're degraded to harmless by-products.