Was your contractor supposed to landscape the site with "good black dirt"? If so, he didn't. It looks like you've been given, at best, fill soil. It's predominantly clay (about 87% of the soil particles are "fine", which means they're very, very small. This indicates a clay soil), with the remainder being sand and gravel. The gravel could be left over from the building job if the contractor spread gravel for a temporary driveway or road and then skid-steered it into the soil when spreading the garbage soil that they dumped. Had the samples been taken near the property's borders, the gravel may not have been present.
It's also possible that your soil is actually sub-soil; it may simply be the "spoil" left over from digging the foundation, spread out after the job was finished.
Regardless of where the soil came from, it is not "good black dirt". If that's what your contract called for, the contractor didn't deliver on it. If you desire restitution (the proper soil delivered), I would recommend that you get your attorney to draw up the appropriate contract, and that the contract call for the contractor to remove at least six inches of this "soil" and replace it with at least six inches of sifted black dirt (this will typically remove weed roots but not weed seed). If you're supposed to have a lawn, that must be hydroseeded and covered with shredded straw (this is better than erosion mat unless you're on a hill).