Planting trees DESPITE septic tank/leach lines
This past summer I purchased a home that sits on an acre in upstate South Carolina. Due to the size of the lot the home features a septic tank and leach lines - I've always had city sewer in the past. Because I did not have any experience with septic tanks I gave little thought (as in zero) to potential problems when I began to landscape my place. Long story short I planted several trees in a backyard that was in desperate need of them; now I am finding out about the damage they will inevitably cause.
Here's my question: Do I absolutely have to remove the trees or is it reasonable to think that a proper maintenance program such as flushing copper chloride will keep the lines clean? I am a huge tree lover and am almost willing to risk the future expense of the tree-root damage for the beauty that the tree will provide in the years leading up to it and after it, but am having an attack of conscious thinking about future home owners (if I were to ever sell it that is).
What do you guys think? Can I keep them or do they have to go? FYI...planted a nuttal oak, two october glory red maples, legacy sugar maple, green vase zelkova on the left side of the property (closer to the tank itself, with the oak being the only one within twenty feet of the tank) and a willow oak and autumn blaze maple on the other end near the part where the leach field drains.
PS. I'm only asking here b/c extensive internet research led me to the answers I expected. I'm hoping one intelligent, like-minded soul out there can offer me hope!