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24/02/2008, 17:06 Gyn_Paul Joined on 23/08/2004 La Creuse - God's own Dept. Posts 1,218 Re: putting in a new Fosse septique  Pat76 wrote: Thanks for the replies. Gyn-Paul, how big is your sand filter? Thanks Pat For our 3000 L fosse the filter is 25sqm (that's 5m x 5m x 1m deep : although because of the layers of gravel below and above the actual sand, and the returned soil on top the actual hole is the better part of 2m.). I opted for a sand filter rather than muck about with field drains because the field it's in is boggy for most of the year, and the previous foss (+ French drains) frequently backed up during periods of heavy and persistant rainfall. All that was required additionally, after the installation of the fosse and the sand filter, was to dig a trench for an outflow to the ditch by the road (some 4m lower than the field and 2m lower than the sand filter). For many installations requiring a sand filter this becomes the main issue: can you run off a pipe at such a low level? I imagine if it had been an issue, our sand filter could have been 10m x 10m x 50cms deep, but that's probably as thin as you can make it without your distributing and collecting pipes practically touching ! p "Don't think of them as problems, think of them as opportunities." "OK, I think I've hit an insurmountable opportunity!"    Report

25/02/2008, 18:08 Pat76 Joined on 14/10/2007 Holmfirth/Charente 16 Posts 21 Re: putting in a new Fosse septique Hi Gyn-Paul Thank you for the information. We don't know how boggy our garden can be, but we are assuming it must get fairly damp near the stream. The ground does not slope much from the house to the stream, so fingers crossed it will not cause a problem! Pat    Report

26/02/2008, 9:20 maude Joined on 21/10/2004 vendee Posts 207 Re: putting in a new Fosse septique cost in Vendee area-450euros. Maude Edited.This is for the survey only and not the 200 quoted by Clare.Obviously the installation cost is another matter! Maude Hope this clarifies this. maude    Report

26/02/2008, 13:02 Gyn_Paul Joined on 23/08/2004 La Creuse - God's own Dept. Posts 1,218 Re: putting in a new Fosse septique If you can put your hand to one of those laser spirit levels, a couple of long sticks marked off in 50cm intervals and another pair of willing hands (wearing a pair of wellies), you can easily work out how far above the water level the garden is. if you find you can establish 5m from water level to mean ground level then you're OK. Failing that, you might be looking at a pumped discharge. But it sounds to me like you really need a site survey from a reputable installer. p edit - the wellies are on the feet not the hands ! "Don't think of them as problems, think of them as opportunities." "OK, I think I've hit an insurmountable opportunity!"    Report

26/02/2008, 13:43 Gyn_Paul Joined on 23/08/2004 La Creuse - God's own Dept. Posts 1,218 Re: putting in a new Fosse septique  maude wrote: cost in Vendee area-450euros. Maude [duplicate post] "Don't think of them as problems, think of them as opportunities." "OK, I think I've hit an insurmountable opportunity!"    Report

26/02/2008, 13:43 Gyn_Paul Joined on 23/08/2004 La Creuse - God's own Dept. Posts 1,218 Re: putting in a new Fosse septique  maude wrote: cost in Vendee area-450euros. Maude Are you sure? is there perhaps a '0' missing here? p "Don't think of them as problems, think of them as opportunities." "OK, I think I've hit an insurmountable opportunity!"    Report

27/02/2008, 18:43 Pat76 Joined on 14/10/2007 Holmfirth/Charente 16 Posts 21 Re: putting in a new Fosse septique Thanks to everyone who took the trouble to reply,  I now have a much better idea of what we need to do. Pat    Report

28/02/2008, 7:44 Boiling a frog Joined on 06/09/2004 Charente 16 Posts 638 Re: putting in a new Fosse septique The first step is to contact your Mairie and ask who it is that carries out the inspections and authorisations for septic tanks.Hopefully it is a representative from SPANC and if so you arrange an appointment with the representative who will come out and tell you exactly what system is required.Also hopefully they will already know the type of soil (they do in our area) so no need for a soil test.You then put in an application and you should receive authorisation within a couple of weeks.The rep will probably also be able to give you some recommendations for installation,beware of man with digger who may or may not know how to install a fosse and drainage .           Boiling a frog    Report

28/02/2008, 8:08 Patf Joined on 23/08/2004 SW Gers Posts 2,310 Re: putting in a new Fosse septique One of the peolpe who gave us an estimate reminded us to find out where the water, electricity gas and telephone underground systems were. Don't want to cut through any of them.    Report

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