After looking through 94 pages of this. The Appraiser did not mention anything about the Septic System because the area around the drain field was dry, probably due to lack of usage. No other items were required repair. If the Appraiser did write up the observable MPRs the buyer or the owner would have completed the repairs for the loan.
Even if the Appraiser check the boxes of well and septic, there may not be evidence that the distance between them was sufficent for FHA Requirements, even the home inspector could not find it. The borrower and owner had the tank pumped, and flow tested, there were no reports of problems? This buyer would have bought the home, they were unlucky, that after 3 months of use the system failed.