Thanks for the replies so far. This is not for the Lakes area. This is the only NH forum I participate in and I knew somebody here would be able to help. I got a link from another board to a chart that showed my zone (southern NH) in the 60-70" range but I feel that is far too pessimistic.
At some point I will need to speak with my local code officer if I want to go this route. My leach tank and dry well are grandfatherred but if this is considerred a "major" change to the system, permits and other responsibilities may make it cheaper to just use a laundrymat.
Thanks!
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