Does anyone else have any reccs if I do this myself or do I contract a planning expert to do so. QUOTE]
I'd advise you contact a good Architectural Technician, Architect, Engineer, Planning Consultant with experience of appealing to An Bord Pleanala. It is vital that the submission is based on planning law.
Septic tanks or threatment plants polluting your well is a good point. Especially if your well be "downhill" of their system, an experienced professional will advise you.
Site survey/ levels, photographic record, soil test results etc. Lots to do, arguments to make, points to raise. Don't do it yourself - its too important to risk making a mistake.
I know abit about tax returns but I hire my Accountant to submitt my tax returns. I know a lot about the law and court cases but I also hire my Solicitor to represent me! A little knowledge can be a dangerous thing.
Hire a professional asap, time is very important - do not run out of time!
Good luck