i'm sure this has been asked & answered but since i can't see anything i'll post as my first question

here's what we've got .. bulldozer came in, prepared ground for 24' AGP, guy used a transit & installed stakes to level .. my hubby has worked his tail off taking dirt off to level & i think he's trying to get the ground as level as glass .. so how many inches does it have to be within before we level with sand? kinda anxious to get the pool up & running before winter hits

p. s. glad i found this forum, looks like i'll be checking in often .. thanks for your help!