. >> reporter: paige and nick ippolito moved into a house managed by balfour beatty communities. >> it was a distressed property probably 20 years ago. >> reporter: within months a water leak warped their floor and a company technician recorded his concern that the couple's infant daughter could become sick from chewing on flooring tiles that contained asbestos. >> it's very upsetting to know that he was concerned for our child's safety but didn't tell us. >> reporter: maintenance documents say the leak was repaired almost immediately. >> it says the call was put in at 4:32 p.m., and it was completed at 4:52. that's a physical impossibility to fix something of that extent in 20 minutes. >> reporter: but internal records reviewed by cbs news and reuters reveal at the time balfour beatty employees at tinker kept two sets of books. calls were first recorded on paper and only entered into a computer system when a job was nearly completed. this made it appear the company was quickly addressing problems and kept it eligible for millions in performance bonuses. >> whenever you generate a work

. >> reporter: ...paige and nick ippolito moved into a house managed by balfour beatty communities. > was a distressed property probably 20 years ago. >> reporter: within months a water leak warped their floor and a company technician recorded his concern that the couple's infant daughter could become sick from chewing on flooring tiles that contained asbestos. >> it's very upsetting to know that he was concerned for our child's safety but didn't tell us. >> reporter: maintenance documents say the leak was repaired almost immediately. >> it says the call was put in at 4:32 p.m., and it was completed at 4:52. that's a physical impossibility to fix something of that extent in 20 minutes. >> reporter: but internal records reviewed by cbs news and reuters reveal at the time balfour beatty employees at epnker kept two sets of books. calls were first recorded on paper and only entered into a computer system when a job was nearly completed. this made it appear the company was quickly addressing problems and kept it eligible for millions in performance bonuses. >> whenever you generate a work