Hey all.
We just got back from BCV and spent lots of time at SAB. The pool was recently reopened after being refurbished and there was sand in all areas of the pool, including the lazy river portion.
Of course there were areas where the sand was "washed" away, such as the area going up to the two spas - there are stairs in this area and I could imagine sand being a hazard. The only other area where there was definitely no sand was the whirlpool area - an area of the pool near the bottom of the slide that had water "spinning" or "whirling" - it's a lot of fun!!
The rest of the pools were sandy bottomed.
The quiet pool and spa is definitely a normal, concrete pool.