I apologize in advance for the long newbie post. We recently purchased a round 24 x 52 AGP. It is scheduled to be installed in a few weeks. We are supposed to have the site ready and 4 yards of sand on site for the installers. We rented a mini excavator and had the area worked on yesterday. Our contract says the installers will correct leveling issues up to 8". My husband is convinced that the site isnt going to work. He is concerned about drainage issues because we had a hard rain right after the excavation was done and theres a little water standing in one corner. We know nothing about how to install drainage pipes or if we even need to. I have attached a picture. I know this isnt much to go on. Any info is appreciated.