I don't think it's so much an issue of contamination from the field (unless there is a failure) as it is a question of whether the playset will affect the field. Installers I've talked to say nothing should be on top of the field that will cause compaction, such as structures and vehicles. It will probably be worth calling a couple of septic companies and asking if there would be a problem building the size set you want.

Hi everyone: Thanks for all of your comments! This is what I've decided to do: I'm going to amend the soil this summer, let it lay fallow over the winter and put the berries in early next spring. To do this I'm going to "roundup" the marginal amount of grass on the site and turn over the soil/sod, incorporating elemental sulfur and pine sawdust (and pine needles if I can find a source). I'm not planning to dig down past about 8" - I've been told by several folks that as long as I don't go into the sand or gravel of the field I should be ok. Once that's done, I'll mulch the whole shebang with pine chips for the winter. I would like to plant blueberry sod, but the price for the size area I'm covering ($3/ft) is pretty steep for me (plus husband will have a heart attack). I've found a source in Fryeburg, Maine that sells lowbush blueberry plugs and so I'm thinking I'll go with that, or perhaps a combination of plugs and sod. This is all kind of risky, given how dry the leach field gets in the high summer, but a) I think the mulch with help somewhat; and b) there are lots of blueberries growing on Pum Island on the sand dunes and they seem to survive the lack of water ok. So, once again thanks for all of your interest. If any of you have leads on other sources for lowbush blueberry stock I'd appreciate the tips. I'll post a follow up next spring (hopefully with pictures) to show what I did. Have a lovely growing season, papercarver

Hi everyone: Thanks for all of your comments! This is what I've decided to do: I'm going to amend the soil this summer, let it lay fallow over the winter and put the berries in early next spring. To do this I'm going to "roundup" the marginal amount of grass on the site and turn over the soil/sod, incorporating elemental sulfur and pine sawdust (and pine needles if I can find a source). I'm not planning to dig down past about 8" - I've been told by several folks that as long as I don't go into the sand or gravel of the field I should be ok. Once that's done, I'll mulch the whole shebang with pine chips for the winter. I would like to plant blueberry sod, but the price for the size area I'm covering ($3/ft) is pretty steep for me (plus husband will have a heart attack). I've found a source in Fryeburg, Maine that sells lowbush blueberry plugs and so I'm thinking I'll go with that, or perhaps a combination of plugs and sod. This is all kind of risky, given how dry the leach field gets in the high summer, but a) I think the mulch with help somewhat; and b) there are lots of blueberries growing on Pum Island on the sand dunes and they seem to survive the lack of water ok. So, once again thanks for all of your interest. If any of you have leads on other sources for lowbush blueberry stock I'd appreciate the tips. I'll post a follow up next spring (hopefully with pictures) to show what I did. Have a lovely growing season, papercarver

Hi everyone: Thanks for all of your comments! This is what I've decided to do: I'm going to amend the soil this summer, let it lay fallow over the winter and put the berries in early next spring. To do this I'm going to "roundup" the marginal amount of grass on the site and turn over the soil/sod, incorporating elemental sulfur and pine sawdust (and pine needles if I can find a source). I'm not planning to dig down past about 8" - I've been told by several folks that as long as I don't go into the sand or gravel of the field I should be ok. Once that's done, I'll mulch the whole shebang with pine chips for the winter. I would like to plant blueberry sod, but the price for the size area I'm covering ($3/ft) is pretty steep for me (plus husband will have a heart attack). I've found a source in Fryeburg, Maine that sells lowbush blueberry plugs and so I'm thinking I'll go with that, or perhaps a combination of plugs and sod. This is all kind of risky, given how dry the leach field gets in the high summer, but a) I think the mulch with help somewhat; and b) there are lots of blueberries growing on Plum Island on the sand dunes and they seem to survive the lack of water ok. So, once again thanks for all of your interest. If any of you have leads on other sources for lowbush blueberry stock I'd appreciate the tips. I'll post a follow up next spring (hopefully with pictures) to show what I did. Have a lovely growing season, papercarver