Break and remove concrete from garage floor.
Excavate pyritic material.
Repair all cracks in foundation.
Backfill with DB certified material (3/4 inch clean gravel).
Install geotextile membrane.
Install polyethylene (vapour barrier).
Install garage drain box. Which is gravity fed to the sump pit.
Pour new 4 inch reinforced concrete slab.
Remove all excess material.
Clean the work area.