what evidence did you provide that the appraiser knew that there were required unseeable repairs needed. not following a guideline isn't considered intentional fraud. it's usually a light slap on the wrist by FHA. you seem like a smart person who didn't understand that every older house needs some repairs. as is means i understand it's not brand new, i accept the problems. i minored in psych and you cannot accept what happened. one way to ruin your health.
Lets start at what evidence the appraiser had to disclose the fact it was well and septic.
The listing told her it was well and septic
The sellers disclosure told her it was well and septic
The OSSFF told her it was well and septic
The receipt for the septic tank being pumped told her it was well and septic
Her own eyes and pictures at the property told her it was well and septic
In her own words, the phone call to her after discovering the error, admitted she was required to determine minimum distance requirements.
Next use your psych degree to ask yourself why she chose to conceal that and NUMEROUS other factual items that she not only marked did not exist, she cropped/framed them out of every appraisal picture.
Hint, another appraisers forum, one that doesn't deflect to the borrower, stated it was intentionally done to "close the loan."
I'm glad you mention every older house needs some repairs, because the fact she did not mark one item subject to repair on an older home in average condition per FHA was a red flag and required a field review PRIOR to closing.