Read about small septic systems that work. There is almost no case where a septic system cannot be devised for any soil. Sandy soils may be best for septic systems. Do NOT instantly believe the hype of sewerage system engineers. Research for yourself.
Franklin Michigan people fought the pump and grind sewer system and got a hybrid system. Very acrimonious battle.
Developers tried to force the wrong system on people and use sewers as a way to get development areas that they can pack houses into and maximize their profit.
http://www.google.co.uk/search?q=small+flows+clearing+house&ie=UTF-8&oe=UTF-8&hl=en&client=
No one in government listens to anyone but the big developers with engineering hype money and influence because of a history of working with government engineers!
Will ye no think kindly on those who would be your friends! May the sun shine with your thoughts, today, and happiness grow in your heart! May you allow yourself some peace of mind.